Question # 1

Enthalpy of neutralization (∆H°n) per mole of H2SO4/ Ba(OH)2 is

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+57.4 kJmol-1

-114.8 kJmol-1

-57.4 kJmol-1

Which one of the following substances is a synthetic polyester?

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cotton

nylon

rayon

terylene

The pressure of 5dm³gas increase from 250 torr to 500 torr then new volume of gas

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500 cm³

375 cm³

2500 cm³

None of these

Amino acid α-hydroxy carboxylic acid and

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CO₂ gas

H₂ gas

N₂ gas

NH₃ gas

Indicate the number of open chain isomers of C6H14

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4

5

6

7

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destory

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50,000

10,000

20,000

None of these

For a gas the isotherm is the graph between

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V and T

T and P

n and T

P and V

Which of the following molecules have a permanent dipole

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CH₄

CHCl₃

CCl₄

CO₂

Which fiber contains 85% acrylonitrile by weght?

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azlon fiber

saran fiber

acrylic fiber

rayon fiber

London forces are more affective at

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low temperature

high temperature

low pressure

low temperature and high pressure

Acidification of soil can leach metal:

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Al

Hg

Pb

Ca

Variable valency is generally exhibited by

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Normal elements

Transition elements

Metallic elements

None of these

The relation between Kc and Kp is

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The orbital in Rutherford's model is

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Spiral

Circular

Both

None

Ozone in most of the tropical regions acts as a pollutant and causes

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Damages to eyes

Aggravates asthma

Chest discomfort

All of these

Which is the derived lipid?

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Common fats

Vitamin-D

Common oils

Spinolipids

The human body can synthesize ______ amino acids

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1

10

20

19

A polymer may be

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Homopolemer

Co-polymer

Terpolymer

All of these

Ethyl alcohol prepared during fermentation is pure:

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20%

10%

11%

12%

Which of the following reactions occur at moderate rate :

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Rusting of iron

Chemical weathering of stone work of buildings by acidic gases in atmosphere.

Hydrolysis of an ester

Fermentation of sugars

A chemical reaction A---------->B is said to be in equilibrium when :

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Rate of transformation of A to B is equal to B to A.

50% reactant has been changed to B.

Conversion of A to B is 50% complete

Complete conversion of A to B has taken place.

UV radiations bring about

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Skin cancer

Mouth cancer

Lung cancer

Liver cancer

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