Question # 1

Polypeptides are formed from amino acids by

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Oxidation

Addition

Condensation

Reduction

General formula of aliphatic carboxylic acids:

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R-OH

R-COH

R-CO-R

RCOOH

Requirement of macronutrient per acre of the land is

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5 to 200 kg

20-200 kg

200-400 kg

30-400 kg

What is the weight of 10 dm³of CO₂at 27°C and 2 atm?

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89.3 g

56.1 g

125 g

127 g

In which of the following a re dipole-dipole interaction present?

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molecules of CCL₄

molecules of solid iodine

molecules of NH₃

atoms of the helium gas

Plastic, rubber, synthetic fibers belong to macromolecules:

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Inorganic

organic

Biopolymer

synthetic

The protein component of enzyme ls called

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apoenzyme

proenzyme

holoenyme

co-enzyme

Albumin, globin and casein are

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Milk proteins

Plasma proteins

Egg proteins

Meat proteins

Which of the following statement about ribose is incorrect

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Poly hydroxyl compound

It is an aldo sugar

Contain six carbon atoms

It exhibit optical activity

Which class of compound cannot show positional isomerism?

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Alkanes

Alkene

Alkynes

Alcohol

A gas is heated in a closed vessel. Which of the following statement is not true for the gas?

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the intermolecular forces between particles weaken

the kinetic energy of particles increases

the total internal energy of the gas remains constant

the total internal energy of the gas increases

Chemistry related to the study of environment affected by the chemicals and pollutants is called:

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Biochemistry

Physical chemistry

Pharmaceutical chemistry

Environmental chemistry

Potassium hexacyanoferrate (II) has the formula

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K₄[Fe(CN)₆]

K₃[Fe(CN)₆]

K₂[Fe(CN)₆]

K [Fe(CN)₆]

During the formation of a chemical bond the potential energy of the system

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Decreases

Increases

Does not change

None of these

The number of amino acids found in proteins that a human body can synthesize is

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20

10

5

14

Which of the following statement is incorrect about SHE(Standard hydrogen electrode):

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Reduction potential of Cu⁺² is smaller than H⁺ions whenit is coupled with copper electrode.

gas is passed in it at 1 atm pressure.

Its oxidation potential and reduction potential is zero.

It is made of platinum wire dipped in HCl solution

What is the total number of different chloroethanes of formula C₂H_6-nCl_npossible (n may be 1 to 6)

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6

8

9

10

The natural fertilizers consist of

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Plants

Animals

Both plants and animals

Microorganisms

Azeotropic mixture of HCl and water has

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48% HCl

22.2% HCl

36% HCl

20.2% HCl

Which of the following is a molecular diseases?

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Allergy

Cancer

German measles

Sickle cell anemia

An ionic compound A+B is most likely to be formed when

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The ionization energy of A is high and electron affinity of B is low.

The ionization energy of A is low and electron affinity of B is high.

Both ionization energy of A and electron affinity of B are high.

Both ionization energy of A and electron affinity of B are low.

Alcohols, phenols and ethers may be considered as derivative of

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Hydrocarbons

Benzene

Carboxylic acid

Water

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