22nd Apr 2018 09:00AM
Topic:- Physics
A circular loop of area 1cm2, carrying a current of 10A, is placed in a magnetic field of 0.1T such a way that the plane of the loop is perpendicular to the magnetic field. The torque acting on the loop due to the magnetic field is: /
1 2 , 10A , 0.1T :
1. 10-4
2. 10-6Nm
4. 1Nm
Correct Answer :-
Zero /
If the ground state energy of hydrogen is -13.6eV, then the potential energy and the kinetic energy of the electron in that state respectively are: /
-13.6eV , : :
1. 27.2eV and -13.6eV / 27.2eV -13.6eV
2. -27.2eV and 13.6eV / -27.2eV 13.6eV
3. -13.6eV and -27.2eV / -13.6eV -27.2eV
4. 13.6eV and 27.2eV / 13.6eV 27.2eV
Correct Answer :-
-27.2eV and 13.6eV / -27.2eV 13.6eV
The coefficient of friction between the road and tyre of a vehicle is 0.04. The maximum allowable speed of a vehicle which when takes a turning of 20 m radius along a level road is: (take g = 10m/s2) /
0.04 20 . : (g = 10/2 )
1. 2.2 m/s / 2.2 /
2.
3.
4.
4)
5)
6)
7)
After 4 half-life time, the percentage of original radioactive substance left will be: /
4 , :
1. 12.5%
2. 6.25%
3. 25%
4. 3.125%
Correct Answer :-
The magnetic field of a bar magnet is similar to: /
:
1. Magnetic field due to straight solenoid carrying a direct current /
2. Magnetic field of a straight wire carrying direct current /
3. Magnetic field due to coil of wire carrying alternating current /
4. Magnetic field of a straight wire carrying alternating current /
Correct Answer :-
Magnetic field due to straight solenoid carrying a direct current /
While passing electric currents through two long straight parallel conductors in opposite directions, the magnetic force acting between them will be: /
, :
1. Repulsive /
2. Neither attractive nor repulsive /
3. Attractive /
4. Both attractive and repulsive /
Correct Answer :-
Repulsive /
The displacement of particle executing simple harmonic motion is given by y = 5sin20πt. Its frequency is: /
y = 5sin20πt :
1. 20πHz
2. 10Hz
3. 10πHz
4. 20Hz
Correct Answer :-
8)
9)
10)
11)
10Hz
An electric dipole with charges +q and –q having the electric dipole moment ‘P’ is placed in a uniform electric field ‘E’. If its dipole moment is along the direction of the electric field, then the net force on acting on it and its potential energy are respectively: /
+q –q P , E , : :
1. zero and minimum /
2. qE and maximum / qE
3. qE and PE / qE PE
4. 2qE and minimum / 2qE
Correct Answer :-
zero and minimum /
When the light passes from glass to water, the parameter that remains constant is: /
, :
1. Frequency /
Correct Answer :-
Frequency /
For an ideal transformer, the input voltage and current are 200V and 2 A respectively. If the output current is 1.5A, then the output voltage is: /
() : 200 2 () 1.5 , -
1. 400V
2. 266.7V
3. 2667V
4. 26.67V
Correct Answer :-
For wave propagation, a medium is necessary for: /
, :
1. X rays / X
2. Cosmic rays /
3. Sound waves /
4. Infra red rays /
12)
13)
14)
15)
Sound waves /
The bob of the simple pendulum is made with a hollow sphere containing mercury which is suspended by means of a wire. If a little mercury is drained off, then the period of oscillation of the pendulum will: /
, , , :
1. decrease /
2. remain unchange /
3. become unstable /
4. increase /
Correct Answer :-
The escape velocity of a body depends upon mass as: /
:
1. ve∝ m
2. ve∝ m2
3. ve∝ m3
4. Escape velocity does not depend on mass /
Correct Answer :-
Escape velocity does not depend on mass /
The moment of inertia of a thin circular disc of mass ‘M’ and radius ‘R’ about any diameter is: /
‘M’ ‘R’ : :
1. 2MR2
2. MR2
Correct Answer :-
The equation y = A sin2 (kx–ωt) represents a wave with: /
y = A sin2 (kx–ωt) :
16)
17)
18)
1.
2.
3.
4.
Correct Answer :-
The capacity of a parallel plate capacitor in air is 55 x 10-6F and on immersing it into oil it becomes 110 x 10-6F. The dielectric constant of oil is: /
55 x 10-6F , 110 x 10-6F :
1. 3
2. 2
3. 1.1
4. 0.5
Correct Answer :-
2
The range of wavelength of visible light in the electromagnetic spectrum is: /
:
1. 3800nm to 7700nm / 3800nm 7700nm
2. 3.8mm to7.7mm / 3.8mm 7.7mm
3. 3.8fermi to 7.7fermi / 3.8 7.7
4. 3800 A0 to 7700 A0 / 3800 A0 7700 A0
Correct Answer :-
3800 A0 to 7700 A0 / 3800 A0 7700 A0
The significant figures of the number 8.0096 are: /
8.0096 :
1. 5
2. 3
3. 1
4. 4
5
The temperature of hot junction at which the thermo emf produced in the thermocouple becomes maximum is called________. /
_____ ,
1. critical temperature /
2. inversion temperature /
3. curie point /
4. neutral temperature /
Correct Answer :-
neutral temperature /
The potential barrier of silicon at 27°C is 0.7 eV. The potential barrier at 47°C is: /
27°C 0.7 eV 47°C :
1. 0.6 eV
2. 1.07 eV
3. 1.4 eV
4. 0.75 eV
Correct Answer :-
0.75 eV
If two electrons are forced to come close to each other, then the potential energy of the system will: /
- , :
1. decrease /
3. become zero /
4. increase /
Correct Answer :-
increase /
If three capacitors each of capacitance 1µF are connected in such a way that the resultant capacitance of the system is 1.5µF, then: /
1µF 1.5 µF :
1. two capacitors are connected in parallel and one in series with the parallel combination / ,
2. two capacitors are connected in series and one in parallel with the series combination / , ,

23)
24)
25)
4. all three capacitors are connected in series /
Correct Answer :-
two capacitors are connected in series and one in parallel with the series combination / , ,
In the relation y = r sin(ωt + kx), the dimensional formula for kx or ωt is same as: /
y = r sin (ωt + kx) , kx ωt :
1.
2.
3.
4.
Correct Answer :-
A water fountain on the ground sprinkles water all around it. If the speed of the water coming out of the fountain is ‘v’, then the maximum area around the fountain that gets wet is: /
‘v’ , :
1.
2.
3.
4.
Correct Answer :-
When the switch is made off, a spark is seen inside the switch. It is due to fact that: /
, :
1. no earthing is provided for the electric circuit in the building /

26)
27)
28)
29)
3. very high induced emf is produced since the break is faster / , ...
4. the short circuit is produced at the break /
Correct Answer :-
very high induced emf is produced since the break is faster / , ...
A bulb of 60W is connected is series with an inductor and a dc source. Now the dc source is replaced by an ac source of same rms value of voltage, then the brightness of the bulb will: /
60W - - - , :
1. decrease /
3. increase /
4. be exactly half of the brightness as that in the dc source / - ,
Correct Answer :-
decrease /
An object is placed at distance of 25 cm from a concave lens. If the image is got at 5cm from the lens, then the power of the lens is: /
25 5 :
1. 6 D
-16D
Two bodies of the same mass moving along a straight line in opposite directions with velocities 3 m/s and 6 m/s undergo perfectly inelastic collision. After collision their velocities are respectively: /
3 / 6 / : : :
1. 0m/s, 0m/s / 0 /, 0 /
2. 6m/s, 3m/s / 6 /, 3 /
3. 4.5m/s, 4.5m/s / 4.5 /, 4.5 /
4. 3m/s, 6m/s / 3 /, 6 /
Correct Answer :-
4.5m/s, 4.5m/s / 4.5 /, 4.5 /
Two resistors of 100Ω and 200Ω are connected in series with a 3.1 volt battery. If an ammeter of resistance 10Ω is used to measure current, then ammeter reading will be: /
30)
31)
32)
100Ω 200Ω , 3.1 10Ω , :
1. zero /
0.01A
Two projectiles are having the same directions of projection. If their velocities of projection are in the ratio 1 : 2, then their horizontal ranges will be in the ratio: /
1 : 2 , :
1. 4 : 1
2. 1 : 1
3. 1 : 4
4. 1 : 2
Correct Answer :-
1 : 4
Pressure, Kelvin temperature and molecular mass of an ideal gas are respectively P, T and M. The density of the gas is: /
, : P, T M :
1.
2.
3.
4.
Correct Answer :-
If one electron is removed from an isolated body, then the charge remaining on the body will be: /
, :
1. -1.6 x 10-19 coulomb / -1.6 x 10-19
2. 1.6 x 1019 coulomb / 1.6 x 1019
33)
34)
35)
36)
3. 1.6 x 10-19 coulomb / 1.6 x 10-19
4. 3.2 x 10-19 coulomb / 3.2 x 10-19
Correct Answer :-
1.6 x 10-19 coulomb / 1.6 x 10-19
A current of 2 ampere produces a deflection of 30° in a tangent galvanometer. A deflection of 60° will be produced in it by a current of: /
2 30° 60° :
1. 6A
2. 3A
3. 1A
4. 4A
Correct Answer :-
6A
A box is there on the top of a truck moving horizontally. The coefficient of limiting friction between the box and platform of the truck is ‘µ’. The maximum acceleration the truck can have without the box sliding is: /
‘µ’ :
1. µg
2. µ2g
µg
If ‘g’ is the acceleration due to gravity on the earth’s surface, the gain in the potential energy of an object of mass ‘m’ raised from the surface of the earth to a height equal to radius ‘R’ of the earth is: /
‘g’ , ‘m’ , ‘R’ -
1. mgR/4
2. mgR/2
3. mgR
mgR/2
A 2kg mass is acted upon by two mutually perpendicular forces 3N and 4N. The acceleration produced on the body is: /
37)
38)
39)
40)
2 . 3N 4N :
1. 2 m/s2
2. 2.5 m/s2
3. 10 m/s2
Correct Answer :-
2.5 m/s2
A process in which volume is kept constant is known as: /
, :
1. Isothermal process /
2. Isobaric process /
3. Isochoric process /
4. Adiabatic process /
Correct Answer :-
Isochoric process /
On a hill station, water boils at 95°C. The temperature expressed in Fahrenheit is: /
, 95°C :
1. 171°F
2. 203°F
3. 20.3°F
4. 100°F
Correct Answer :-
203°F
The resistance of a wire is 10Ω. It is drawn in order to increase its length by 100%. The new resistance of the wire will be: /
10Ω 100% :
1. 20Ω
2. 2.5Ω
3. 40Ω
4. 5Ω
Correct Answer :-
40Ω

41)
42)
43)
‘m’ : , :
1. Twice the angular momentum of the body /
2. Twice the kinetic energy of the body /
3. Angular momentum of the body /
4. Kinetic energy of the body /
Correct Answer :-
Twice the kinetic energy of the body /
To remove the barrier potential from a p-n junction diode : /
p-n ( ) -
1. The diode is to be forward biased /
2. The diode is to be reverse biased /
3. A low current is to be sent through the diode /
4. A high current is to be sent through the diode /
Correct Answer :-
The diode is to be forward biased /
A particle is thrown upwards with a certain initial velocity. It reaches the maximum height and subsequently returns back to the initial point. Throughout its motion, the physical quantity which remains constant is: /
, :
1. Speed /
4. Velocity /
Correct Answer :-
Acceleration /
A body of mass ‘m’ is projected with a velocity ‘u’ at an angle 30° with the horizontal. The magnitude of the change in momentum at the end of the flight is: /
‘m’ ‘u’ 30° :
1. mu
2. 2mu
(III)
A wire fixed at the upper end, stretches by a length ‘l’ when a force ‘F’ is applied. The work done in stretching is: /
50)
1)
‘l’ , ‘F’ -
1. 2Fl
2. Fl
Correct Answer :-
When a sphere having moment of inertia ‘I’ about an axis passing through its center of gravity and mass ‘m’ rolls from rest down an inclined plane without slipping, its kinetic energy is: /
: ‘I’ ‘m’ ,
1. Iω + mv
Correct Answer :-
Topic:- Chemistry
Given below are the standard reduction potentials in aqueous medium for the following. Which is the correct decreasing order of their oxidizing property? /
?
Al3+ / Al; E0= 1.66V
Tl3+/ Tl; E0 = +1.26V
In3+/ In; E0 = 0.34V
Ga3+/ Ga; E0 = 0.56V
2)
3)
4)
Correct Answer :-
The correct order of reactivity of following compounds in nucleophilic substitution is: /
:
i C2H5Br ii C2H5Cl iii C6H5CH2Br iv CH3OC6H4Br
1. iii > i > ii > iv
2. ii > iv > iii > i
3. iv > ii > iii > i
4. i > ii > iii > iv
Correct Answer :-
iii > i > ii > iv
Which one of the following statements is CORRECT regarding enzyme inhibition action? /
?
1. Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme. /

2. Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein. /
,
3. Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate. /

4. Non-competitive inhibitors often bind to the enzyme irreversibly. /
,
Correct Answer :-
Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme. /

KH (Henry’s constant) of N2 and O2 for a solvent are 76 kbar and 34 kbar respectively, at a given temperature. This implies that: /
, N2 O2 KH ( ) 76 kbar 34 kbar :
1. Nitrogen is less soluble in the liquid than oxygen /
,
2. None of the above /
3. Oxygen is less soluble in the liquid than nitrogen /
,

5)
6)
7)
8)
,
Correct Answer :-
Nitrogen is less soluble in the liquid than oxygen /
,
The phosphodiester linkage between pentose sugar of nucleotide is present between carbon at: /
, ______
1. 2 and 3 / 2 3
2. 3 and 1 / 3 1
3. 5 and 3 / 5 3
4. 5 and 2 / 5 2
Correct Answer :-
5 and 3 / 5 3
The number of electrons required to deposit 1 gm atom of aluminium (at wt =27) from a solution of aluminium chloride will be: /
1 ( =27 ) :
1. 1M
2. 3M
3. 1N
4. 3N
Correct Answer :-
3N
0.5% of aqueous solution of potassium chloride found to freeze at 272.76 K (Kf of water is 1.86 K kg/mol). The van’t Hoff factor is approximately: /
0.5% 272.76 ( Kf =1.86 /) () , ________
1. Cannot be predicted /
2. 1
3. 2
Which of the following does NOT reduce nitrobenzene to aniline? /
?
9)
10)
11)
Which of the following is the least reactive alkali metal? /
?
1. Rb
2. Na
3. K
4. Li
Correct Answer :-
Li
5 ml of freshly prepared ferrous sulphate solution is taken in each of four test tubes.Strips of aluminium, magnesium, silver and copper are introduced in these tubes.A black residue is obtained in two of them Identify the pair./
5 , ,
1. Copper and aluminium /
2. Aluminium and copper /
3. Magnesium and aluminium /
4. Magnesium and silver /
Correct Answer :-
Magnesium and aluminium /
The concentration of N2O5 is 2.33 mol/L and after 184 minutes, it is reduced to
2.08 mol/ L The reaction takes place according to the equation
2 N2O5 (g) → 4 NO2 (g) + O2 (g), the rate of production of NO2 during this period is: /
N2O5 , 2.33 / 184 , 2.08 / 2 N2O5 (g) → 4 NO2 (g) + O2 (g) , , NO2 :
1. 6.79 × 10–4 mol L–1/min / 6.79 × 10–4 –1/
2. 2.72 × 10–3 mol L–1min–1 / 2.72 × 10–3 –1/-1
3. 0.679 × 10–4 mol L–1/min / 0.679 × 10–4 –1/
4. 0.272 × 10–4 mol L–1/min-1 / 0.272 × 10–4 –1/-1
Correct Answer :-
12)
13)
14)
15)
2.72 × 10–3 mol L–1min–1 / 2.72 × 10–3 –1/-1
While cooking the bottom of the vessel is getting blackened on the outside. It is due to: /
, :
1. Food is not cooked completely /
2. Fuel is burnt completely /
3. Fuel is wet /
4. Fuel is not burning completely /
Correct Answer :-
Fuel is not burning completely /
The hydrocarbon that shows isomerism among the following is: /
, :
1. C5H12
2. C3H4
3. C2H6
4. C3H6
Correct Answer :-
α-D-(+) :
1. α- L(-) glucose / α- L(-)
2. α- D (-) glucose / α- D (-)
3. β-D(+) glucose / β-D(+)
4. β- L(-) glucose / β- L(-)
Correct Answer :-
α- L(-) glucose / α- L(-)
Name the metal which is a constuent of green colouring maer in plants. /
:
1. Calcium /
2. Magnesium /
3. Sodium /
4. Iron /
16)
17)
18)
19)
When water is electrolysed, it produces hydrogen and oxygen gas.What type of reacon takes place in this case? /
, ?
1. Displacement /
2. Combinaon /
3. Double displacement / -
4. Decomposion reacon /
Correct Answer :-
Decomposion reacon /
Propene and propane can be disnguished from each other by_________. /
_______
1. Red litmus paper / -
2. Bromine water /
3. pH paper / pH
4. Blue litmus paper / -
Correct Answer :-
Bromine water /
Low oxidaon states in transion metals are found when: /
, :
1. A metal complex compound has ligands capable of σ-bonding. /
σ-
2. A metal complex compound has ligands capable of π-acceptor character in addion to the σ-bonding. /
σ- π-
3. A metal complex compound has ligands capable of π-acceptor character. /
π-
4. Central metal ion shows inert pair effect. /

Correct Answer :-
A metal complex compound has ligands capable of π-acceptor character in addion to the σ-bonding. /
σ- π-
PCl5 is ionic in solid state and exist as: /
, PCl5 _____
1. [PCl4]- [PCl6]+
2. [PCl4]+ [PCl6]-
Correct Answer :-
[PCl4]+ [PCl6]-
Idenfy the element which is both brile and non-ducle. /
, -
1. Platinum /
2. Sulphur /
Correct Answer :-
Sulphur /
Which one of the following elements will lose an electron easily? /
, ?
1. Mg
2. Ca
3. Be
4. Sr
Correct Answer :-
Which of the following properes belong to halogens family? /
?
1. They have 1 electron in the valence shell / ( ) 1
2. They are highly metallic in nature /
3. They are mono-atomic / (-)
4. They are strong oxidising agents /
Correct Answer :-
They are strong oxidising agents /
Misch metal is an alloy consisng of: /
, , :
1. Rare earth metal, iron and traces of S, Ca and Al / , S, Ca Al
2. d element and traces of S, Ca and Al / d S, Ca Al
3. Alkali metal, iron and traces of S, Ca and Al / , S, Ca Al

24)
25)
26)
27)
4. Rare earth element and traces of S and Al / S Al
Correct Answer :-
Rare earth metal, iron and traces of S, Ca and Al / , S, Ca Al
The molarity of sulphuric acid soluon is 18, if the density is 1.8g/cc, then the concentraon in mol/kg is: /
, 18 1.8g/cc , mol/Kg :
1. 0.05m
2. 50m
3. 5.0m
4. 500m
Correct Answer :-
500m
The sodium salt of an unknown anion when treated with MgCl2 gives a white precipitate only on boiling. Identify the anion. /
MgCl2
1. CO3 2
2. SO4 2
HCO3
The non-stoichiometric compound Fe0.94O is formed when x % of Fe2+ ions are replaced by Fe3+ ions. The value of x is: /
Fe2+ x%, Fe3+ , - Fe0.94O x :
1. 15
2. 12
3. 6
4. 18
Correct Answer :-
18
The enthalpy of vaporization of a liquid is 60 kJ/ mol and its entropy of vaporization is 150 J/mol. What is the boiling point of the liquid at 1 atm.pressure? /
28)
29)
30)
31)
, 60 / , 150 / 1 ?
1. 250 K
2. 200 K
3. 450 K
4. 400 K
Correct Answer :-
400 K
The important arsenide type of semiconductor devices are prepared by combination of _____ groups /
, _____
1. 13 and 15 / 13 15
2. 13 and 11 / 13 11
3. 12 and 10 / 12 10
4. 12 and 15 / 12 15
Correct Answer :-
13 and 15 / 13 15
Compound A is reduced to an alcohol B by sodium in ethanol. A and B answers haloform test. A is: /
A, B A B A :
1. Propanal /
2. Ethanal /
3. Butanal /
4. Methanal /
Gypsum on heating to a temperature above 120°C gives: /
1200C ______
1. CaSO4
CaSO4

32)
33)
34)
, () :
1. Odd electron on chlorine atom is delocalized /

2. Odd electron on chlorine atom is localized /

3. Odd electron on oxygen atom is delocalized /
,
4. Odd electron on oxygen atom is localized /

Correct Answer :-
Odd electron on chlorine atom is delocalized /

If the empirical formula of an organic compound is BrH5C2, then what is the percentage composition by mass of bromine? (at. Mass of Br = 80) /
BrH5C2 , ? (Br = 80 )
1. 73.4%
2. 85%
3. 88.2%
4. 79.9%
Correct Answer :-
73.4%
If the standard internal energy change for the combustion of methane is –Y kJ/mol at 298 K, then what would be the value of H0? / 298 K , -Y / , H0 ?
1. +Y kJ/mol / +Y /
2. –Y + 4.95 kJ/ mol / –Y + 4.95 /
3. –Y kJ/mol / –Y /
4. –Y–4.95 kJ/mol / –Y–4.95 /
Correct Answer :-
Esters are reduced to aldehydes by using _________. /
_______
1. Sn and HCl / Sn HCl
2. H2/ Pd

35)
36)
37)
38)
3. Di-isobutyl aluminium hydride / -
4. NaBH4
Correct Answer :-
Di-isobutyl aluminium hydride / -
Hydrolysis of sugar is catalyzed by H+ ion. Half life of the reaction is independent of initial concentration of sugar at a particular pH. At a constant concentration of sugar, the rate increases ten times when pH is decreased by one unit. Pick the CORRECT expression. /
-, H+ pH , ,
1. r=k[sugar][H+]
2. r=k[sugar]1/2[H+]0
3. r=k[sugar]2
4. r=k [H+]
r=k [H+]
Which of the following sets of quantum numbers correctly describe an electron present in 4f orbital? /
, 4f ?
1. n = 3, l = 2, m = −2, s = − ½
2. n = 4, l = 3, m = +1, s = + ½
3. n = 4, l = 3, m = 4, s = − ½
4. n = 4, l = 4, m = −4, s = + ½
Correct Answer :-
Which of the following is not an electromagnetic in nature? /
- ?
1. Sound waves /
2. Radar waves /
3. Ultra violet rays /
4. Infra-red rays /
Correct Answer :-
Sound waves /
Which one of the following statements is CORRECT about denaturation of protein? /
?
1. Renaturaon is reverse of denaturaon /
(),
39)
40)
41)

3. Denaturaon is always irreversible /
,
4. Denaturaon is carried out by change in pH /
, pH
Correct Answer :-
,
Which one of the following statements is CORRECT about the oxides of nitrogen? /
?
1. Nitric oxide is paramagnec in gaseous state / ,
2. Nitrogen trioxide is an anhydride of nitric acid / ,
3. Nitrogen pentoxide is liquid at room temperature / ,
4. Nitrogen pentoxide is a reducing agent / ,
Correct Answer :-
Nitric oxide is paramagnec in gaseous state / ,
Identify the metal used and the compound formed as the byproduct when the large scale preparation of hydrogen is carried out by Lane’s process? /
, ?
1. Al, Al2O3
2. Ca, Ca(OH)2
3. Fe, Fe2O3
4. Fe, Fe3O4
PHBV is a biodegradable polymer with _____ linkage. /
PHBV , _____
1. amide /
3. sulphur /
4. ester /
Correct Answer :-
499 disintegrations/min / 499 /
On what does the value of the universal gas constant depend on? /
?
1. Temperature of the gas /
2. Units of pressure and volume /
3. Pressure of the gas /
4. Number of moles of the gas /
Correct Answer :-
Units of pressure and volume /
A hydrogenation reaction is carried out at 500K. If the same reaction is carried out in presence of a catalyst at the same rate required at 400K, energy barrier is lowered by 20kJ/mol, then the activation energy of the reaction is: /
500K , 400K , - 20 / ,
1. 200 kJ/mol / 200 /
2. 500 kJ/mol / 500 /
3. 100 kJ/mol / 100 /
4. 300 kJ/mol / 300 /
Correct Answer :-
100 kJ/mol / 100 /
During froth floatation process, _____ is used as a depressant to separate PbS from ZnS ore because only____ forms complex with the depressant thereby preventing its froth formation. /
,________ , ZnS PbS , _______
1. NaCN, PbS
2. NaCN, ZnS
3. NaOH, PbS
4. NaOH, ZnS
1-Methyl cyclopentene can be converted into 2-methyl cyclopentanol by: /
_______ 1- , 2- |
1. Dehydrogenaon /
2. Hydroboraon /
3. Oxymercuraon-demercuraon / -
4. Acid catalyzed hydraon /
Correct Answer :-
Correct Answer :-
1. 0.1797 x104 years / 0.1797 x104
2. 2.34 x 104 years / 2.34 x 104
3. 1.261 x 103 years / 1.261 x 103
4. 1.261 x 104 years / 1.261 x 104
Correct Answer :-
49)
50)
1)
3. Pinacole rearrangement /
4. Hofmann rearrangement /
Correct Answer :-
1. 7.2 x 10−6 g, 4.32 x 104 s
2. 7.2 x 10−4 g, 8.64 x 104 s
3. 7.2 x 10−3 g, 4.32 x 103 s
4. 7.2 x 10−5 g, 4.32 x 104 s
Correct Answer :-
Topic:- Mathematics
If f ( 1 ) = 1, n 1, f ( n + 1) = 2f ( n ) + 1, then f ( n ) = /
f ( 1 ) = 1, n 1, f ( n + 1) = 2f ( n ) + 1 , f ( n ) =
1. n
2. 0
2)
3)
4)
5)
The number of 4-digit numbers that can be formed by using digits 1, 2, 3, 4, 5 such that atleast one digit is repeated is ______. /
4 1, 2, 3, 4, 5 , _________
1.
2.
3.
4.
Correct Answer :-
The distance between the points P (ab sin , 0) and Q (0, ab cos ) is /
P (ab sin , 0) Q (0, ab cos ) :
1. ab
3. x = 0
4. y = 0
Correct Answer :-
y = 0
The length, breadth and height of a cuboid are in the ratio 2 : 3 : 4 and if its total surface area is 208cm2, its height is /
, 2 : 3 : 4 208 2 , :
1. 12 cm / 12 .
2. 4 cm / 4 .
6)
7)
8)
Correct Answer :-
8 cm / 8 .
ABC is an equilateral triangle inscribed in a circle of radius 4cm. CD is perpendicular to AB. The side AC =? /
ABC, 4 . CD, AB AC =?
1.
2.
3.
4.
Correct Answer :-
There are two cones. The curved surface area of the first one is twice the second. The slant height of the second one is twice that of the first. The ratio of their radii is : /
, :
1. 2 : 3
2. 4 : 1
3. 1 : 2
4. 1 : 3
9)
10)
11)
12)
The diameter of a wheel is 84cm. How many revolutions will it make to cover 792m? /
84 792 ?
1. 300
2. 600
3. 270
4. 210
Correct Answer :-
300
The area bounded by the lines y = x, y = 0 and x = 4 is: /
y = x, y = 0 x = 4 :
1. 14 sq units / 14
2. 4 sq units / 4
3. 8 sq units / 8
4. 16 sq units / 16
Correct Answer :-
8 sq units / 8
The maximum number of common tangents that can be drawn to two circles which touch each other externally is : /
, :
1. 3
2. 1
3. 4
4. 2
Correct Answer :-
3
The point C(a, b) which divides the line segment joining the points A(2, 5) and B(-5, -2) in the ratio 3 : 4 lies in the______ quadrant. /
C(a, b), A(2, 5) B(-5, -2) 3 : 4 , _____
1. 1st /
2. 4th /
13)
14)
15)
16)
The probability of friends Reena and Kavya not celebrating their birthday on the same day of the year (non-leap year) is : /
( ) :
1. 1
Correct Answer :-
The equation of the line which passes through the point of intersection of the lines x – 2y + 3 = 0 and 2x + y – 4 = 0 and has slope 2 is: /
, x – 2y + 3 = 0 2x + y – 4 = 0 2
1. 2x + y = 0
2. x + y = 2
3. x + y = 1
4. 2x - y = 0
2x - y = 0
The equation of the locus of a point which is equidistant from the axes is: /
, :
1. x + y = 1
Correct Answer :-
y = x
The line segment joining the points (1, 3) and (13, -6) is divided by x-axis in the ratio: /
(1, 3) (13, -6) , x- :
1. 1 2
2. 1 13
Correct Answer :-
1 2
A bag contains 3 red, 4 white and 5 blue balls. Two balls are drawn at random. The probability that they are of different colours is___. /
3 , 4 5 , ___
1. None of the above /
2.
3.
4.
Correct Answer :-
A radioactive element disintegrates at a rate proportional to the quantity of substance P at any time t. What is the differential equation of the disintegration? /
, t P ?
1.
2.
3.
4.
Correct Answer :-
If the length of the major axis of an ellipse is three times the length of its minor axis, its eccentricity is: /
, , :
1.
20)
21)
22)
2.
3.
4.
Correct Answer :-
If there is a 60% chance of rain today, then the probability that it will not rain today is _______. /
60% , __________
1.
2.
3.
4.
Correct Answer :-
If the tangent to the curve x = at2, y = 2at is perpendicular to x axis, then its point of contact is: /
x = at2, y = 2at , x- , :
1. (0, 1)
2. (0, 0)
3. None of the above /
4. (1, 0)
Correct Answer :-
(0, 0)
In triangle PQR, M and N are points on sides PQ and PR, respectively. If PM = 4cm, PN = 3cm, MQ = 12cm and NR = 9cm, then QR = ______. /
PQR , PQ PR M N : PM = 4 , PN = 3 , MQ = 12 NR = 9 , QR = ______
1. 3MN
2. 4MN
3. 2MN
4MN
If (4, 0) and (-4, 0) are the foci of an ellipse and the semi-minor axis is 3, then the ellipse passes through which one of the following points? /
(4, 0) (-4, 0) - 3 , ?
1. (0, 5)
2. (0, 0)
3. (5, 0)
4. (3, 0)
Correct Answer :-
(5, 0)
What are the degree and order respectively of differential equation of the family of rectangular hyperbolas whose axes of symmetry are the coordinate axes? /
, , ?
1. 1, 1
2. 2, 2
3. 2, 1
4. 1, 2
Correct Answer :-
1, 1
What is the equation of the curve passing through the origin and satisfying the differential equation dy = (y tan x + sec x) dx? /
, dy = (y tan x + sec x) dx ?
1. x = y cos x
2. y = x cos x
3. y = cos x + sin x
4. y = log( sec x + tan x)
Correct Answer :-
x = y cos x
On increasing the diameter of a circle by 40%, its area will be increased by _____. /
40% , _____
1. 96%
96%
How many numbers can be formed with the digits 1, 2, 3, 4, 3, 2, 1 so that the odd digits always occupy the odd places? /
1, 2, 3, 4, 3, 2, 1 , ?
1. 16
2. 14
3. 12
4. 18
Correct Answer :-
18
If x2 + 9y2 = 91 and xy = 5, then the value of x + 3y = /
x2 + 9y2 = 91 xy = 5, x + 3y =
1. ±13
2. ±10
3. ±11
4. ±12
Correct Answer :-
±11
Two concentric circles are of radii 10cm and 6cm. The length of the chord to the larger circle which is a tangent to the smaller circle is _____. /
10 6 _______
1. 12cm / 12
2. 14cm / 14
3. 16cm / 16
4. 8cm / 8
Correct Answer :-
16cm / 16
A circle is touching the side DE of triangle ADE at F and touching AD and AE produced, at B and C respectively. If AB = 12cm, then AD + DE + AE = _____. /
, ADE DE F AD AE : B C AB = 12 , AD + DE + AE = _____
31)
32)
33)
Correct Answer :-
24cm / 24
A dealer sells an article for Rs.75 and gains as much percent as the cost price of the article. The cost price of the article is: /
75 :
1. Rs. 70 / 70
2. Rs. 60 / 60
3. Rs. 50 / 50
4. Rs. 55 / 55
Correct Answer :-
Rs. 50 / 50
Which one of the following points lie inside a circle of radius 6 and centre at (3, 5)? /
, 6 (3, 5) ?
1. (0, 1)
2. (-2, -1)
3. (2, -1)
4. (3, -5)
Correct Answer :-
(0, 1)
A fair coin is tossed repeatedly. The probability of getting a result in the fifth toss different from those obtained in the first four tosses is: /
- :
1.
2.
3.
4.
34)
35)
36)
37)
Ravi travels a distance of 36 kilometers in 5 hours. He travels a part of the distance on foot at an average speed of 4 km/hr. and rest of the distance on cycle at an average speed of 12 km/hr. The distance travelled on cycle is: /
5 36 4 / 12 / :
1. 22 km / 22
2. 12 km / 12
3. 20 km / 20
4. 24 km / 24
Correct Answer :-
24 km / 24
Twelve solid spheres of the same size are made by melting a solid metallic cylinder of base diameter 2cm and height 16cm. The diameter of each sphere is: /
, 2 16 :
1. 1cm / 1
2. 2cm / 2
3. 4cm / 4
4. 8cm / 8
Correct Answer :-
2cm / 2
Equation of the plane cuts off three coordinate axes at A, B, C in such a way that the centroid of triangle ABC is (3,2,5). Then its equation is ________. /
A, B, C ABC (3,2,5) ________
1.
2.
3.
4.
Correct Answer :-
If f ( xy ) = f ( x ) f ( y ), then f ( t ) may be of the form : /
f ( xy ) = f ( x ) f ( y ), f ( t ) :
1. None of these /
38)
39)
40)
Correct Answer :-
Find the values of ‘a’ for which the center of the circle is (2a – 1, 3a + 1), diameter is 20 units and the circle passes through (-3, -1). /
‘a’ , (2a – 1, 3a + 1) , 20 (-3, -1)
1.
2.
3.
4.
Correct Answer :-
Find the eccentricity of ellipse, if length of major axis is three times the length of minor axis. /
, ,
1.
2.
3.
4.
Correct Answer :-
Number of words formed by 2 vowels and 3 consonants taken from 4 vowels and 5 consonants is _____. /
4 5 2 3 _____
1. 60
2. 120
7200
If a garden roller 140cm long covers an area of 43.12m2, in 10 revolutions, then its diameter is : /
140 , 10 43.12 2 , :
1. 84cm / 84
2. 120cm / 120
3. 72cm / 72
4. 98cm / 98
Correct Answer :-
1.
2.
3.
4.
51)
52)
53)
Correct Answer :-
1. 1
2. 0
3. xy
Correct Answer :-
1. -1
2. 1
3. 0
Correct Answer :-
1. None of the above /
2.
3.
4.
Correct Answer :-
1.
2.
3.
4.
1. None of the above /
2.
3.
4.
Correct Answer :-
10cm / 10
When 1 is added to each of two numbers, their ratio becomes 1 2 and when 5 is subtracted from each of them,
their ratio is 5 11. The difference between the numbers is: /
1 , 1 2 5 ,
5 11 :
1. 36
2. 71
3. 26
4. 35
Correct Answer :-