Question # 1

The type of bonding in HCl is

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Pure covalent

Polar covalent

Highly polar

Hydrogen bonding

Which one of the following pairs are chemically dissimilar.

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Na and K

Ba and Sr

Zr and HF

Ca and Zn

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

The inert gasses AR, Ka, and Xe form solid compounds with certain organic molecules under pressure..

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Halides

Hydrates

Clathrates

All of above

In which property listed below hydrogen does not resemble alkali metals.

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Tendency to form cation

Nature of oxide

Combination with halogens

Reducing character.

The bond length is measured by

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X-ray diffraction

Neutron diffraction

Microwave spectroscopy

All of above

The principal ores of copper are

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Copper sulphides

Copper oxides

Both sulphides and oxides

Copper carbonate

Which of the following elements display maximum tnedency to form P Pi - p PI multiple bonds with itself and with carbon and oxygen.

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N

p

Bi

As

Which of the following is not true of ozone.

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It is a strong electilizing agent

It attacks organic compounds containing carbon carbon double bond

Its molecular is linear and has two different O-O bond lengths

It is more powerful oxidising agent at molecular oxygen

Which of the following is not an alkali metal.

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Potassium

Francium

Sodium

Strontium

Which of the following reactions is employed to produce ozone in the laboratory.

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Exposure of air to UV light

Reaction of F2 with H2O at low temperature

Reaction SO2 with H2O2

Passage of silent electric discharge through oxygen

Ca H2 on reaction with water liberates

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H2

O2

Botha of these

None of these

Which of tetra chloride is resistant to hydrolysis.

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CCl4

SiCl4

GeCl4

SnCl4

The formula of borax glass is.

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Na2B4O7 10H2O

Na2B4O7 5H2O

Na B4 O7

None of above

HCIO4, HNO3 and HCL are all strong acids in aqueous solution inglacial acetic acid medium, their acid strength is such that.

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HCIO4 > HCL > HNO3

HNO3 > HCIO4 > HCl

HCl > HCIO4 > HNO3

The coordination number of closely packed hexagonal is.

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4

6

8

12

The element Uuu has atomic numebr

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102

111

101

110

Which metal can produce dihydrogen gas by reaction with dil H2SO4

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Ag

Fe

Cu

Pt

Which of the following gas is lightest.

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Dihydrogen

Helium

Dinitrogen

Dioxygen

Sulphate ores of aluminium

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Alumite

Cryolite

Fekdsper

Kaolin

Mangalium is an alloy of.

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Al + Mg

Mg + Ai + Mn

Mg + Ai + Cu

Mg + Ai + Cu + Mn

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