Question # 1

A thionic acid

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H2S2O3

H2S2O6

H2S2O8

H2S2O7

The formula of bleaching powder is.

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Ca OCl2

CaCIO3

Ca(CIO)3)2

CaOCI

The most reactive alkali metal among the following is

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Li

Na

Cs

Rb

Which of the following iso electronic spices has the highest IE.

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Ne

Na+

F

O2-

Noble gases are used in discharge tubes to give different colours. Raddish orange glow is due to.

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Ar

Ne

Xe

Kr

The rising world temperature will have serious effect on.

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Agriculture

Animal production

Human being

All above

Pick out the ideal conditions needed for the manufacture of H2SO4 by contact process.

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Low temperature high pressure and high concentration of reactants

Low temperature , low concentration of reactants and low pressure

High temperature high pressure and high concentration of reactants

Low temperature, low pressure and high concentration of reactants.

Which of the following process is involved in the purification of crude metals.

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Liquation process

Oxidation process

Distillation process

Electro refining

According to SHAB, Lewis acid are divided into.

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Two classes

Three classes

Four classes

None of above

The maximum absorption in [Ti(OH)2)6 3+ take place at wavelength of.

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4000 A^o

5000 A^o

6000 A^o

10000 A^o

An sp3 hybrid orbital contains

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1/4 a character

1/2 a character

2/3 a character

3/4 a character

Atomic volume of C, N, O and F are in the order

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C > N > F > O

C > N > O > F

F > O > N >C

N > C > O >F

The colour of Ni2+ ion is.

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Blue

Green

deep green

Orange

How pig iron is usually obtained from

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iron pyrite

Limonite

Hematite

Siderite

Variable electrovalency is due to the following reasons.

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Unstable configuration of core

Inset electron pair effect

All of above

None of above

Which of the following alloys contains Cu and Zn

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Bronze

Brass

Gun metal

Type metal

Phosphorus normally exhibit a covalency of.

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+1 and +2

+2 and +3

+3 and +4

+4 and +5

Which of the following statements false about transition metals.

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They form complexes

They show variable valency

All transiting metal compounds are paramagnetic

They form coloured ions

Which one of the following noble gas is obtained by radioactive disintegrastion

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Kr

Br

Rn

Xe

Select the correct IUPAC name for [FeF4(OH)2]-

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Diaquatrafluoriron (III) ion

Diaquateratrafluoriferrate (III) ion

Diaquatertrafluoroiron (I)

None of these

The inert gases Ar, Kr and Ke form compounds with water at low temperature and high pressure. These compounds are called.

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Halides

Hydrates

Clathrates

All of above

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