Question # 1

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

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50000

20000

100000

10000

Ester with raspberry flavor

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Amyl acetate

Isobutyl formate

Amyl butyrate

Octyl acetate

Each of the following compounds is effective as a refrigerant.
The release of which one of these cause the greatest depletion of the ozone layer?

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CC₂/F₂

CH₃OCH₃

CH₃CHF₂

CH₃CH₂CH₃

The volume of a real gas

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is constant

increases with T decrease

becomes zero at absolute zero

never becomes zero

Plastics are amorphous solids and

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have sharp melting points

undergo clean cleavage when cut with knife

do not undergo clean cleavage

possess orderly arrangement over long distances

The structure of a polymer depends upon how the monomer-repeating unit joins to make a polymer. What is not the type of structure of a polymer

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Synthetic polymer

Linear polymer

Branched

Cross linked or inter connected polymer

Which of the following gives silver mirror with ammonicaT AgNO3

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Benzyl alcohol

Benzene

Benzoic acid

Benzaldehyde

Starch is a polymer of

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Sucrose

Fructose

α-D-Glucose

Lactose

Which one is a non-polar compound?

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SnCl2

PH3

Gecl4

H2O

The boding which covalent molecules containing hydrogen and one of the small electronegative element such as O, For Mis called:

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ionic bonding

bridge bonding

H-bonding

metalic bonding

Most animals can not digest:

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starch

cellulose

proteins

glucose

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0.12

0.50

0.25

4.00

The mass of the neutron is of the order of

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10^-23kg

10^-24kg

10^-26kg

10^-27kg

The spectrum of He is expected to be similar to that of

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H

Na

He⁺

Li⁺

Which of the following is not a fertilizer

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Nitrophos

Dolomite

Super phosphate of lime

Urea

Maximum freezing point falls in

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Camphor

Naphthalene

Benzene

Water

The four bonds of carbon in methane are directed towards the corners of

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Cube

Pentagon

Hexagon

Tetrahedron

Soft drinks and baby feeding bottles are generally made up of

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Polyester

Polyurethane

Polyurea

Polystyrene

Which of the following elements is not stable:

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Xe

Ar.

Kr.

Li.

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

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SO₂

NO₂

CO

A and b only

The term cryoscopy is used for

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Depression of freezing point

Elevation in boiling poing

Lowering of vapour pressure

Osmotic pressure

Aqueous solution of glucose C₆H₁₂O₆, boils at 100.052°C. The solution contains

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180 grams glucose in 1 kg water

18 grams glucose in 1 kg water

1.8 grams glucose in 1 kg water

3.6 grams glucose in 1 kg

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