Question # 1

A single free chlorine redical can destroy ozone molecules upto:

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100000

100

1000

10000

If V₁= 5 litters, P₁= 2 atm, T₁= 273°C, T₂= 0°C and V₂= ? When P₂= 1 atm.

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5 lit

10 lit

2.5 lit

12.5 lit

Propanone does not undergo

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Oxime formation

Reduction of Fehling solution

Hydrazone formation with hydrazine

Reaction with HCN

The % of CO₂in the atmosphere is

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3.0%

0.03%

0.3%

0.5%

A polymer of polyvinyl chloride with DP 1000 has molecular or molar mass:

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630

6300

63000

630000

Under which condition CO has the maximum molar volume

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high T and P

Low T and High p

high T and low P

Low T and low P

Pressure remaining constant, at which temperature the volume of a gas will become twice of what it is at 0°C

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546°C

200°C

546 K

273 K

The instrument that is used to measure the pressure of a gas is called

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viscometer

photometer

barometer

stalagmometer

Which one is nitrogen fertilizer among the following:

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calcium sulphate

urea

magnesium carbonate

potassium phosphate

The heat of hydrogenation of most of the alkene is about

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120 kJ/mol

100 kJ/mol

140 kJ/mol

105 kJ/mol

The polymers which can be re-softened again and again are called

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Thermoplastic

Thermosetting

Both a and b

None

Which is in differnet phase form other metals

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Ni

Hg

Cd

Na

Where lime is not used

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In refining or metals

In paper industry

In glass industry

In the preparation of NaOH

pH of water is 7, if 0.01 M NaOH is added, than its pH is

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12

14

zero

10

Lactic acid on oxidation by alkaline potassium permanganate gives

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Tartaric acid

Pyruvic acid

Cinnamic acid

Propionic acid

Which gas is not a constituent of atmosphere

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Xe

O₃

H₂

F₂

IIB elements (Zn, Cd, Hg) and III B elements (Sc, Y and La) are

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Non typical transition element

Typical transition element

Normal elements

Inner transition element

The chemical reactivity of glass is reduced by the use of

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Fluxes

Formers

Stabilizers

None of these

Dilatometer method is useful for the reaction that involve :

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Small volume changes in solutions

Change in infractive indices

Where reactants absorb U.V, visible or infrared radiation

Ecology is a science of environment and deals specially with

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Stratosphere

Biosphere

Lithosphere

Hydrosphere

X-ray work has shown that the diameters of atom are of the order of

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8 x 10^-10m

2 x 10^-10m

8 x 10^-8m

2 x 10^-8m

Copper oxide is dedected by borax bead test with colour:

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Blue

Red

Yellow

Black

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