Question # 1

A thionic acid

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H2S2O3

H2S2O6

H2S2O8

H2S2O7

The process in which ore is heated generally in the absence of air, to expel water from a hydrated oxide at temperature below their melting points is called.

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calcination

Roasting

Froth floatation

Bessemerization

Which one of the following ions is colourless.

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Cu+

Co2+

Ni2+

Fe3+

The boiling point of water is unexpectedly high because.

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H2O molecule in linear

Sp3 hydrogen bonding is involved in the formation of water

There is hydrogen bonding and consequent association of H2O molecules.

Oxygen is the first member of the VI group

Which of the following hydroxide is amphoteric.

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B(OH)3

Al(OH)3

Ga (OH)3

In (OH)3

Hydrogen gas will not redue

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Heated cupric oxide

Headed ferric oxide

Heated stannic oxide

Heated aluminium oxide

Which among the following is a Talse statement.

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SO3 is obtained by the catalytic oxidation of SO2

SO3 has trigonal planar geometry in gaseous state

SO3 in nauseous state has all S-O bonds equivalent

SO3 gas shows more solubility in water than in H2SO4

The most stable oxidation state shown by lead is.

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+2 , +4

+2 only

+3 , +4

+4 only

Which of the following is not true as compared with alkaline earth metals.

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Alkali metals are more reactive

Alkali metals have lower density

Alkali metals are more electro positiveness

Alkali metals have stronger metallic bonds

Lithium shows diagonal relationship with

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Beryllium

Sodium

Magnesium

Calcium

All the member of group III A are metals except.

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B

Ai

Ga

In

Calcium cyanamide on treatment with steam under pressure gives NH3 and

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Calcium carbonate

Calcium hydroxide

Calcium oxide

Calcium bicarbonate

Which of the following is the third most abundant element in the nature.

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Oxygen

Sulphur

Aluminum

Hydrogen

Xenon diflouride is obtained by irradiating a mixture of xenon and fluorine with light from a high pressure.

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Mercury arc

Tungeston arc

Xenon arc

None of above

Which halide of cesium will be highly ionic in nature.

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K+

Ag+

Rb+

Ca+

Metallic bond is treated essentially as in character

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Ionic

Covalent

Polar

Non polar

Phosphorus has the oxidation state of +3 in

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Orthophosphoric acid

Hypophosphoric acid

Metaphosphoric acid

Orthophosphorus acid

The Hall process involves the reduction of Al2O3 to aluminium by

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Carbon

Carbon monoxide

Molecular hydrogen

Electrolysis

Flourine differs from the other members of its own group due to.

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Its small size and low bond energy

Its higher electornegativity

None-availability of d-orbitals in its valence shell

All the above

Group IV A consist of elements.

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3

4

5

6

Which of the following compounds is electrovalent in nature.

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SO2

ICI

KBr

CHI3

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