Question # 1

In which of the following elements +1 oxidation state is more stable than +3

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B

Al

ga

Ti

A current of 9.65 ampere flowing ofr 10 minutes deposits 3.0 g of the metal which is monovalent. The atomic mass of the metal is

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10

50

30

96.5

Bond angle is minimum for

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H₂O

H₂S

H₂Se

H₂Te

What happens when CCl₄is treated with AgNO₃solution?

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NO₂will be evolved

A white ppt. of AgCl will form

CCl₄will dissolve in AgNO₃solution

Nothing will happen

Which of the following halogens does not form its oxyacids?

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F

Cl

Br

I

Inter molecular forces in solid hydrogen are

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Covalent forces

Van der Waal forces or London dispersion forces

Hydrogen bonds

All of these.

DDT is formed from

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Benzene and Chlorobenzene

Chloral and Chlorobenzene

Chloral and benzene

Chlorobenzene and chlorine

Which one is the property of an ideal solvent?

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Should be expensive

It should react chemically with the solute

Impurities should crystallize along with the solute

Should be safe to use

The treatment of benzene with isobutene in the presence of sulphuric acid give

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isobutyl benzene

tert-Butyl benzene

n- Butyl benzene

no reaction

One mole of gas refers to

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The number of molecules in one litre of gas

The number of molecules in one gram of gas

The number of molecules contained in 12 grams of ¹²C isotope

The number of molecules in 22.4 litres of a gas at S.T.P.

The acid used in lead storage cells is

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Phosphoric acid

Nitric acid

Sulphuric acid

Hydrochloric acid

A certain current liberate 0.5 g of hydrogen in 2 h. How many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution?

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12.7 gm

15.9 gm

31.8 gm

63.5 gm

Variable valency is generally exhibited by

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Normal elements

Transition elements

Metallic elements

None of these.

Bromine is obtained on a commercial scale from

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Caliche

Carnallite

Common satl

Cryolite

The number of oxygen atoms in 4.4 g of CO₂is approximately

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1.2 x 10²³

6 x 10²²

6 x 10²³

12 x 10²³

The maximum number of electrons in a subshell for whichι = 3 is

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14

10

8

4

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