Question # 1

In crystal structure of sodium chloride the arrangement of CI^- ions is

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Fee

Both fee and bcc

Bee

None of these

The last orbit of argon would have electrons

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8

18

2

6

According to MO Theory the species O⁺₂ possesses

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Bond order of 2.5

Three unpaired electrons

Diamagnetic character

Stability lower then O₂

For the carbylamine reaction we need hot alc.KOH and

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Any amin and chloroform

Chloroform and Ag powder

A primary amine and chloroform

A mono alkyl amine and trichlorom-ethane

Chile salt petre is

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NaNO₃

Na₂SO₄

KNO₃

Na₂S₂O₃

Which of the following is directly related to Qualitative analysis?

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Identification

Separation

Measurement

Calculation

The equilibrium

Cr₂O^2-₇ 2CrO²₄ is shifted to right in

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An acidic medium

A basic medium

A neutral medium

It does not exist

Heating a mixture of sodium benzoate and soda lime gives

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Methane

Benzene

Sodium benzene

Calcium benzoate

The unit of rate constant for a zero order reaction is

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Liter sec^-1

Liter mol^-1sec^-1

Mol liter^-1sec^-1

Mol sec^-1

Detergents are

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Synthetic products

Natural products

Both A and B

None of the above

An endothermic reaction is one in which

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Heat is converted into electricity

Heat is obsorbed

Heat is evolved

Heat is converted into mechanical work

Among alkali metal salts, the lithium salts are the poorest conductors of electricity in aqueous solution because of

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Easy diffusion of Li⁺ions

Lower ability of Li⁺ions to polarize water molecules

Lowest charge to radius ratio

Higher degree of hydration of Li⁺ions

An endothermic reaction is one in which the reacting substances

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Have more energy than the products

Have less energy than the products

Have the same energy as the products

Are at a higher temperature than the products.

The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water in

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-1.86°C

-3.72°C

+1.86°C

+3.72°C

Which one of the following elements occurs free in nature?

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N

P

As

Sb

The chemical composition of white lead is

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Na₂CO₃

Pb₃O₄

Pb(OH)₂.2PbCO₃

PbO

The number of atoms contained in 11.2 L of SO₂at S.T.P are

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3/2 x 6.02 x 10²³

2 x 6.02 x 10²³

6.02 x 10²³

4 x 6.02 x 10²³

Which of the following is monoatomic?

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Oxygen

Neon

Fluorine

Nitrogen.

Toluene can be oxidized to benzoic acid by

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KMnO₄(alk)

K₂Cr₂O₇(acidic)

Both

None

Which of the following reaction is used for detecting presence of carbonyl group?

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Reaction with hydroxylamine

Reaction with hydrazine

Reaction with phenyl hydrazine

All

Which of the following belongs to the halogen family?

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Francium

Polonium

Radium

Astatine

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

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Mercury

Lead

Nitrogen oxide

Sulphur oxide

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