Question # 1

In beta elimination reaction

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carbon number changes

unsaturated compound is formed

hybridization. ofC remains same

pi bonds are decreased

Which is the correct order of boiling points

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structure of ice

solution of ethanol in water

solution o fNaCl in benzene

linking of helix protein molecule

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

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89.3 g

36.1 g

125 g

127 g

Which of the following has the lowet solubility in water

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НСOOH

CH3СООН

CH3-CH2-СООН

C3H7-COOH

Polumerization process was classified by

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W.H. Garold

William Hackel

W.H. Carothers

H. Carothers

The total number of 3d-series transition elements is

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10

40

14

58

Which one is best buffer those have

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pH = pKa

pH > pKa

pOH < pKb

pKa =0

In which of the following molecules strongest hydrogen bond is shown

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water

ammonia

hydrogen fluoride

hydrogen sulphide

The temperature at which volume of ideal gas is hypothetically zero is called

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Absolute zero

0°C

OK

Both a and c

Which of the following is sweetest sugar

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Glucose

Maltose

Fructose

Sucrose

The particles in solids are

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widely separated and moving randomly

widely separated not moving

moving randomly but not separated

close together and vibrating slightly

By the use of catalysis the energy of activation is

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Decreased

Increased

Not affected

None

For effective collisions the molecules slow down before collision and their kinetic energy decreases which results in increase in their

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Activation energy

Average energy

Potential energy

Collisions frequency

The mass of the neutron is of the order of

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10^-23kg

10^-24kg

10^-26kg

10^-27kg

Nitroalkane are used in

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Fuel

Solvents

Organic synthesis

All of them

Which is not carboxylic acid with pungent smell?

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Formic acid

Acetic acid

Ethanoic acid

Butyric acid

In the electrolysis of aqueous solution of sodium nitrate, the ions which are reduced at the cathode are

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H₃O⁺

Na⁺

OH^-

NO^3-

Which reaction produces a free radical

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SN reaction

Homelytic fission reaction

Heterolytic fission reaction

Addition reaction

A nucleoside may be

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Ribonuleoside

Deoxyribonucleoside

Both a and b

None

Which of the following does give violet colour with neutral ferric chloride?

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Acetic acid

Salicaylic acid

Formine acid

Benzoic acid

the unreactivity of alkanes is based upon

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Inertness of sigma bond

Non-polarity of the bonds

Both A and B

None of above

The major components of coal gas are

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Hydrogen and methane

Ethane and carbon monoxide

Nitrogen and ethane

Ethane and carbon dioxide

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