Question # 1

The fiber which is made from acrylonitrile as monomers:

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PVC

rayon fiber

acrylic fiber

Polyester fiber

pH of an aqueous solution is 3.0 at 25°C. The hydrogen ion concentration in the solution would be

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0.001

0.01

0.0001

10(-5)

Property due to which water acts as a universal solvent is

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Polarity

It's ability to make hydrogen bond

Both A and B

Strong dipole dipole interaction

Indicate the number of open chain isomers of C6H14

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4

5

6

7

Molar mass of high molecular w.f. polymers ranges from:

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1000 to 10000

10000 to 100000

100000 to 1000000

1000 to 1000000

Mercury does not wet the glass because of

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repulsion

weak cohesive force

high viscosity

capillary action

The substance used in the soil to provide element.Which are essential for plant growth are known as:

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manures

fertilizers

pesticides

additive

Which of the following is synthetic thermoplastic polymer

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PVC

Bakelite

Synthetic varnishes

Both b & c

The forces present between the ions and water molecules are called:

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dipole-dipole forces

dipole-induced dipole forces

London dispersion forces

ion-dipole forces

ΔH° represent the enthalpy change at

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0°C and 1 atm pressure

25°Cand 1atm

0K and I atm pressure

25°C and 2 atm pressure

Ethylene polymerizes at 100 atm pressure and 400 °C to give

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Polybenzene

Polypropylene

Polyalcohol

Polyethylene

Coordination number of Pt in [PtCI(NO₂) (NH₃)₄]²⁺is

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2-

4

1

6

When formaldehyde is added to Grignard reagent we get

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Aldehyde

Acetone

Primary alcohol

Secondary alcohol

Chloroform is carcinogenic:

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Heart

Lungs

Liver

Kidney

The sp²hybird orbitals are oriented in space at one angle

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180°

109.5°

100°

120°

Which of the following expressions show a heterolytic bond fission

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Which of the following may affect the rate constant (k) fro a reaction :

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Change in concentration.

Change in pressure.

Change in pH.

Change in temperature.

The digestion of fats in the intestines is aided by

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Diffusion

Protection

Peptization

Emulsification

A free radical reaction takes place in three steps, initiation, propagation and terminations. Which of the following expression represents a propagation step

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The process of electrical coating of one metal on another to protect, decorate or to have greater resistance to corrosion is called

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Electroplating

Electrolysis

Conduction

Induction

Which carbohydrates is an essential constituent of plant cells?

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Starch

Cellulose

Sucrose

Vitamins

Which is made by coordinate covalent bond

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H₃O⁺

H₂O

CH₄

HCl

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