a multidisciplinary quiz

7/29/2019 A Multidisciplinary Quiz

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Team Prizes

Amount

per

participant

Amount per

team

Name of

College

Particpation Prize 250 1000 All

Ist in Written 250 1000 SVC

Ist in Interactive 250 1000 ANDC, SVC

Ist in Paper Reading 250 1000 SVC

Finalist 350 1400

Consolation 300 1200 MH

Third 750 3000 SSC

Second 1000 4000 ANDC

First 1250 5000 SVC



Two optically active alkenes, Band C, have the same

molecular formula, C5H9Cl.

After addition of one mole of H2

to each, B is converted to D(achiral), and C forms E

(optically active). Give the



Siemers and Schitznler, studiedsequences

of echolocation signals from five

sympatric,congeneric Myotis bat species using

sonagrams. The duration, pulse interval andfrequency of echolocation calls for each species

are shown in the Figure provided. Make themost pertinent interpretation and implicationsof these results.

A: Myotis nattereri, B: M. emarginatus, C: M.

mystainus, D: M. daubentonii and E: M.



A metal disc is placed in a static anduniform magnetic field B, and is set torotate in a clockwise direction. Is therean EMF induced between points O and P,where O is the centre of the disc and P isa point on the circumference? (Assume

that B is perpendicular to the face of thedisc.)



There are four isomericunsaturated

compounds (alkenes) with theformulaC

4H

8. These compounds all react

with water in the presence of H2

SO4

as a

catalyst.i. Name the type of compound formed inthis reaction.ii. Three of the four isomers form thesame compound during this reaction.Identify these three isomers and outline

your reasoning.



In a major work on ecological parameters &plant

species diversity result were as shown

below:

Interpret & provide your explanations for theabove observations.(a) Explain the significance of the rate constants

for the metabolism of the drug to stage B(b) What is the significance of the rate constantsfor the metabolism of B to F and C.?(c) Where is the rate –determining step of the

series? What is the significance?

Island Area

(m)

Elevation

(ft)

Distance

from

mainland(m)

Distance

from

otherislands

(m)

Number of

Plant

species

Cedros 134 3950 14 10 205

Guadulupe 98 4600 165 165 163

Santa Cruz 96 2470 20 5 420

San Clemente 56 1965 49 21 235

Natividad 2.8 490 5 5 42

San Geronimo 0.2 130 6 6 4

Ano Nuevo 0.02 60 0.25 0.25 40

In



You may have seen a toycalled the Cartesian diver. It

consists of a cylindrical jarcontaining water, in which asmall doll is floating. The topof the jar is covered with athin rubber sheet. When the

rubber sheet is pressed down,



The Buton Island in Indonesia is home to two sympatric

populations of the Wallacea bats. One population (A) hasa large body and head size. It uses echolocation calls at27.2Htz. The second population (B) has a small body andhead size while using echolocation calls at 53.6Htz.

Interestingly, when the researchers examined the DNA of these two populations of bats for their relatedness, thetwo populations were found to be very distinct. Individualsof population A were found to be significantly similar toeach other (showing 80-90% sequence similarity) but very

different from members of population B (sharing onlyabout 40% sequence similarity). Individuals of populationB were significantly similar to each other, showing 80-90% intra-population sequence identity.

Interpret and provide your own explanations for theabove observations.



The string tied to a pendulumbob is slowly pulled so that the

effective pendulum lengthdecreases extremely slowlywith time.If the pendulum wasinitially oscillating in a simpleharmonic motion, explain what

happens when the string is



While studying thedecomposition of gaseous

N2O5 it is observed that a plot

of logarithm of its partial

pressure versus time islinear. What kinetic

parameters can be obtained



The following schemerepresents the hypothetical

metabolic pathway of a drug. The

values in the parentheses are therate constants for the appropriatesteps.

(0.04) (0.30) (4.67) (0.004) (2.49)

Drug A B C D E Excreted

(0.04)

F Excreted



What is the principle

of working of amicrowave oven? Can

it be used to toastbread?



Account for the trend inacidity:

[Fe(H20)6]2+<[Fe(H20)

6]3+<[Al(H2

0)6]3+

≈ [Hg(H20)

6]2+



Assuming that the Sun sendsenergy to us at a constantrate and that a constantfraction of the earth'ssurface is exposed to the

sun, are the earth and thesun in thermal equilibrium?Give reasons for either an

E h f h f ll i i i



Each of the following reactions iscarried out and the products

separated

by careful distillation, recrystallization orchromatography. For each reaction tellhow many fractions will be collected.

Draw a stereochemical formulaof thecompound(s) making up each fraction.Specify whether each fraction, as

collected, will be optically active oroptically inactive. (i) (S)(Z)-3-penten-2-ol + KMn O

4→

C5H12O3

Th t bilit f ti t t f f EDTA



The stability formation constants of a no. of EDTA-metal complexes are given in table:

(a) What would be the effect of adding 0.01 mmol of EDTA to a solution containing o.5 mmol of copper

(II) and 0.01mol of calcium (II) ions?(b) The Cr-EDTA complex is highly toxic. Statewhether EDTA is suitable to use as a heavy metalantidote for lead when a patient has accidentallyingested a solution containing Chromium (II),

Mercury(II) and Lead(II) ions(c) Explain the consequence of adding 0.05 mmol of

EDTA to a solution containing a mixture of 0.05mmol of Iron (II) and 0.05mmol of Iron (III) ions.

Why would the addition of excess Zinc (II) ions to

Metal Log β Metal Log β

Calcium (II)

Chromium (II)Copper(II)

Iron(II)

10.6

13.018.0

14.3

Iron(III)

Lead(II)Mercury(II)

Zinc(II)

25.1

17.021.0

16.5



We know that magnetic fieldsdo no work on chargedparticles. Yet a piece of iron

jumps up from the tablewhen a bar magnet is

brought near it. What bringsabout the change in kineticenergy?



Gold can be extracted from its ores byreacting the ore with O

2gas in the

presence of aqueous CN- ions according to

this equation.4Au(s) + 8CN-(aq) + O2(g) + 2H

2O(l) →

4[Au(CN)2]-(aq) + 4OH-(aq)

iii. Write the equilibrium expression for this

reaction.ii. At fixed [CN–] and O

2pressure will the

amount of [Au(CN)2]– be greatest at high or

low pH? Justify your answer.



Our ability to determine the direction fromwhich a sound is coming is partly based onthe difference in time at which our twoears detect the sound. Given the speed of sound (350ms-1) and the separationbetween ears (0.15m), what difference isexpected in the times at which a sound

arrives at our two ears? How does thisdifference compare with the timeresolution of the human hearing system?Would a sensory system that utilized 7TM

receptors and G proteins be capable of

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