Question # 1

The gap between occupied and the unoccupied orbitals is not very large and the conduction of electricity is negligible at lower temperature and appreciable at high temperatures then it will be.

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Good conductor

Non conductor

Semi conductor

None of the above

An element having low IE and low EA is likely to belong to.

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Group IA

Group IB

Group VII A

Group VIII

Elements of group 14 have the electronic configuration of their outer shell as

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ns2 np3

ns2 np2

ns2 np6

ns2

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

Ground state electronic configuration of valence shell in N2 m lecule is written as (a2s)2, (o*2s)2 , (pi sp)4, (o2p)2, Hence, the bond order of N2 molecule is.

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1

2

3

0

Molten iron withdrawn from the blast furnace is called.

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Wrought iron

Pig iron

Bessemer iron

Stainless steel

in monel metal copper is alloyed wiht which metal.

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Fe

Mn

Ni

All

Metal crystallize is system having co ordination number

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8

12

14

any one of above

CoCl3 ,6NH3 has six NH3 molecules that satisfy the valency of the Cu3+ metal ion

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Primary

Secondary

Both A and B

None of above

Which of the ionic possesses highest bond energy.

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C-C

Si -Si

Ge - Ge

Sn -Sn

Which of the following has the highest melting poing.

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NaCl

Li Cl

KCl

Rb Cl

Which of the following elements has the highest value of second ionization energy.

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Lithum

Beryllium

Boron

Magnesium

The green colour of glass is due to the presence of.

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Chromium (III)

Cobalt (II)

Mn (IV)

Iron(III)

Which of the following ahs non zero dipole moment.

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NH3

SF6

BF3

CO2

In urea the amount of nitrogen is

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82.0%

46.0%

33.0%

21.0%

Group III A of the periodic table consist of elemetns.

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3

4

5

6

Which of the following statements is not true for both B and Al

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They burn in oxygen to give oxides at high temperature

Their halides are Lewis acids

They combine with nitrogen to form nitrides

They react with HCl to form chlroides.

Pick out the incorrect statement for SO2

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It turns filter paper moistened with acidified K2Cr2O7

It turns starch iodate paper blue

It does not react with chlorine in presence of charcoal

It decolourises acidified KMnO4 solution.

Which of the following is an alloy of copper

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Brass

Bronze

Monel metal

All

The one in which the acceptor atom is of low positive charge, Large size and has several outer electrons which can be easily excited is a.

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Soft base

Hard Base

Soft acid

Hard acid

Main constituent of all inorganic matter

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Carbon

Silicon

Tin

Lead

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