Question # 1

Vapour pressure of a liquid

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increasing with increase of temperature

increases with decrease of temperature

increases with size of container

increases with volume of liquid

Which is most acidic?

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H2O

C2H5OH

C4H9OH

CH3-CH2-CH2OH

The chemical reactivity of glass is reduced by the use of

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fluxes

formers

stabilizers

none of the above

A gas is heated in such a way that its volume and absolute temperature both are doubled. the pressure of gas:

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Becomes 4 time

Becomes half

Becomes 2 time

Remains same

Methyl mercaptan, CH₃SH, is one of the substances responsible for bad breath and is often used to impart a smell to natural gas in a pipeline.
What will be formed when CH₃SH is burned in an excess of air?

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CO CO₂ H₂S

CO H₂O SO₃

CO₂ H₂O SO₂

CO₂ H₂O SO₃

The units of ionic product of H2O is

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Mole dm-3

Mole2 dm-6

Mole-1 dm-3

Mole-2 dm-6

If allowed to expand, the gases suddenly

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heat up

move randomly

react

cool down

The maximum hydrogen bonding is in:

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diethyl ether

ethanol

water

benzene

The compound used to distinguish the ethyne and ethene is

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Alkaline KMnO4

Ammonical AgNO3

Bromine water

Tollen's Reagent

For a chemical reaction in which one of the reactant also act as solvent, the order will be

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First order

Third order

Second order

pseudo-first order

Which of the following has isomorphous structure

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NaF

S

Sn

N

The colour of transition metal complexes is due to

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d-d transitions of electrons

Para magnetic nature of transition elements

Ionization

Loss of s-electrons

Acetaldehyde is used to make

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Rubbber

Antiseptics

Phenolic resin

All of these

Which of the following is present in the stings of bees and wasps

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Formic acid

Citric acid

Carbolic acid

Formalin

NO and NO₂gases in atmosphere are represented by

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NO

NO₄

NO_x

N_xO_y

How many moles of oxygen, O₂are needed for the complete combustion of two moles of butane C₄H₁₀?

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2

8

10

13

Which of the following compounds will react with Tollen's reagent

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Plaster of pares is obtained by heating

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Gypsum

Epsom

Lime stone

Dolomite

On adding sodium nitroprusside ketones give

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Red

Wine red

White

Orange

Which of these polymers is a synthetic polymer

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Animal fat

Starch

Cellulose

Polyester

Which of the following liquid pairs shown a positive deviation from Raoult's law

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CH₃COOH₃+ CH₃CI

C₆H₆+ CH₄OH

H₂O + HCI

H₂O + HNO₃

The colour of the transition metal compounds is due to

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p-d transition

d-d transition

s-p transition

None of these

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