Question # 1

Which is the optimum temperature for the activity of enzyme?

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20 - 35°C

10 -15°C

55 - 70°C

35 - 55°C

Which of the following is incorrect for glucose & sucrose

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Both are water solube

Natural polymers

Source of energy

Carbohydrate in nature

The number of moles of CO2 which contain 16g of oxygen

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0.25

1.00

1.50

0.50

One of the following is not a biopolymer,Point out that one:

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lipid

starch

diamond

protein

Which one of the following gases has lowest density at room temperature:

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NH₃

Ne

N₂

CO

All are examples of different classes of enzymes except

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Hydrolases

Isomerases

Oxido-reductases

Mutases

The material possessing superconducting properties is

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Yb Ba₂ Cu₂ O₈

Hg Be₂ Ca₂ Cu₂ O₈

Y Ba₂ Cu₃ O₇

Y B₂ Cu₃ O₇

Lactic acid is buffered by

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L. Carnosine

Glutathione

Casenogin

Dopa

In Boyle's law which of the following pair is variable:

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Temperature and quantity of a gas.

Pressure and volume.

Volume and quantity of a gas.

Pressure and quantity of a gas.

When equal proportion of DH3_ l and C2H5 ___ l are treated with Na metal in preasence4 of dry ether, the number of possible hydrocarbons obtained will be:

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5

4

3

2

Which of the following is not a charbohydrate

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Nuclic acid

Starch

Glycoyen

Cellulose

The number of elements in the 4th periods of periodic table is

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8

10

18

32

The order of frequency of the following radiations unltraviolet, visible, infrared and microwave is

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Microwave > infrared > visible > ultraviolet

Visible > ultraviolet > microwave > infrared

Ultraviolet > visible > infrared > microwave

Infrared > microwave > ultraviolet > visible

The percentage of methane in natural gas is

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50%

60%

85%

90%

Which of the following pairs are chemically dissimilar?

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Na and K

Ba and Sr

Zr and Hf

Ca and Zn

Which isomer of C₅H₁₁OH gives, one dehydration, the greastest number of different alkenes

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Phosphorus pentoxide finds use as

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An oxidizing agent

A reducing agent

A bleaching agent

A dehydrating agent

Which of the following sets of atomic numbers belong to that of the alkali metals?

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1,12,30,4,62

37,19,3,55

9,17,35,53

12,20,56,88

Which of the following has highest oxidation potential

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Be

Li

Na

Ca

The diameter of atoms is of the order:

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2* 10^-5m

2* 10^-10m

2* 10^-2m

2* 10^-3m

B-B'-dichloroethyl sulphide is commonly known as

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Mustard gas

Laughing gas

Phosgene gas

Bio gas

Picric acid is

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2, 4, 6-Trinitrotoluene

2, 4, 6-Tribomoethanol

2, 4,6-Trinitrophenol

Para-Nitrophenol

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