1.

PART A

The cumulative profits of a company sinceits inception are shown in the diagram. Ifthe net worth of the company at the end of4h year is 99 crores, the principal it hadstarted with was

L 9.9 crores2.91 crores3. 90 crores4. 9.0 crores

Popular use of which of the followingfertilizers increases the aciditv ofsoil?

1" Potassium Nitrate2. Ammonium suiphate3. Urea4. Superphosphate of lime

Exposing an organism to a certain chemicalcan change nucleotide bases in a gene,causing mutation. In one such mutatedorganisin if a protein had only 70o/o of theprimary arnino acid sequence, which of thefollowing is likely?

1. Mutation broke the protein2. The organism could not make amino acids3. Mutation created a terminator codon4. The gene was not transcribed

A reference material is required to be preparedwith 4 ppm calcium. The amount of CaCO3(molecular weight: 100) required to prepare1000 g of such a reference material is

1. 10 pg2. 4pg3. 4mg4. 10 mg

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0-

\ i

J.

4.

5. Identify the figure which depicts a firstorder reaction.

3

Time

The speed ofacar increases everyminute as shown in the following Table.The speed at the end of the 19'n minutewould be

I rime Speed(m,sec)i (minutes)

1. 26.52. 28.03. 27.04. 28.5

If the atmospheric concentration ofcarbon dioxide is doubled and there arefavourable conditions of water,nutrients, light and temperature, whatwould happen to water requirement ofplants?

i. It decreases initially for a short timeand then returns to the orietnal value

2. It increases3. It decreases4. It increases initially for a short time

and then retums to the oneinal value

o

9

c

O0

6.

,7

8. If Vinoul is applied to the circuit shown, theoutput wouid be

A ph,ysiological disorder X aiways leads to thedisorder Y. I{owever. disorder Y may occurby itself. A population shows 4-9.6 incidence ofdisorder Y. Which of the followins inferencesis valid?

I . 4o/o of the population suffers from bothX&Y

2. Less than 4%o of the population suffersfrom X

3. At least 4%o of the population suffersfiomX

4. There is no incidence of X in the sivenpopulation

Water is dripping out. of a tiny hole at thebottom of three flasks whose base diameter isthe same, and are initially filled to the sameheight, as shown

Which is the correct comparison of the rateof fall of the volume of water in the threeflasks?

1. Afastest,Bslowest2. Bfastest.Aslowest

oc

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4.

n

9.

10.

4

11.

3. Bfastest,Cslowest4. Cfastest,Bsiowest

How many o bonds are present in thefollowing moiecule?HC=CCH=CHCH:

1At. 1+

2. 103.6LIJ

The graph represents the depthtemperature in the open ocean;region this is likely to be

1. Tropical region2. Equatorial region3. Polar region4. Sub-tropical region

12.

profile ofin whichprevalent?

13.

The nomal boiling point of a solvent (whosevapour pressure curve is shown in the figure)on a planet whose normal atmosphericpressure is 3 bar, is about

l . 400 K2. 273K3. i00 K4. 500K

f '

14. Diabetic patients are advised a low

glycaemic index diet' The reason for this is

1. Theyrequire less carbohydrate than

healthy individuals2. They cannot assimilate ordinary

carbohYdrates3. They need to have slow, but sustained

release of glucose in their blood sheam

4. They can tolerate lowet, but not higher

than normal blood sugar levels

15. Glucose molecules dift'use across a cell of

diameter d in time z' If the cell diameter is

tripled, the diffusion time would

f. increase to 9r2. decrease to r/33. increase to 3r4. decrease to r/9

16. The reason for the hardness of diamond is

l. extended covalent bonding2. laYered structure3. formation of cage structures4. formation of tubular structures

f7. Which of the following particles'has the

largest range in a given medium if their

initial energies are the same?

1. alpha2. gamma

3. positron4. electron

18. A ball is dropped from a height ft above the

surface of the earth. Ignoring air drag, thecurve that best represents its variation of

acceleration is

.9tuo0)

0G

I tt /I

distance

t----II

distance

(g

06

w

distance

Il\t \l \

distance

(s0)

o

Frs{){}(!

19. Standing on a polished stone floor one feels

colder than on a rough floor of the same

stone. This is because

1. Thermal conductivity of the stone

dePends on the surface smoothness

2. Specific heat of the stone changes by

polishing it3. ttt" temperature of the polished

floor is lower than that of the rough

floor4. There is greater heat loss from the

soles of the feet when in contact

with the polished floor than with the

rough floor

20. The acidity of normal rain water is due to

1. SOz2. COz3. NOz4. NO