Question # 1

Any substance which has solidified from the liquid state with crystallization is known as

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Steel

Fibre

Glass

Asbestos

SO2 acts as

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Lewis base

Lewis acid

Botha A and B

None of above

Which one of the following has the highest boiling point.

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H2O

H2S

H2Se

H2Te

Which of the following parameter is not involved in calculations based on Born Haber Cycle.

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Ionization enthalpy

Electron gain enthalpy

Electronegativity

Bond dissociation energy

The lightest alkali metal is.

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Lithium

Sodium

Rubidium

Caesium

The order in O2+ is

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1.0

1.5

2.0

2.5

The rusting of iron is catalysed by which of the following.

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Fe

O2

Zn

H+

Which of the following compound does not following octet rule.

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CS2

PBr3

IBr

Br F3

Which of the following statement is not true regarding Open Hearth process.

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No iron is lost

The process is economical and simple

Steel obtained is of high quality

Scrap iron cannot be used in this process.

Which of the following elements would have the lowest first ionization energy

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Mg

Rb

Li

Ca

In Dannis's method the end of the copper caps into which graphite electrode are fixed with cement.

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Portiant

Bakelite

Asbestos

All of above

LiAIH4 is most useful reducing agent It reduce to alcohol

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Aldehydes

Ketone

Carboxylic acid

Any of above

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

The energy gap between tag and eg sets in denoted by

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A-

10 Dq

Both A and B

None of above

Which of the following compounds has highest boiling point.

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HI

HF

HBr

HCl

Which of the following will exhibit variable electro Valency due to intert pair effect.

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Fe

Sn

K

Both Fe and Sn

By applying an external force the ionic solid can be easily broken to powder form so the ionic solid are highly

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Hard

Brittle

Tough

Soft

In manufacturing of cement crystallization of amorphous dehydration products of clay

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500 ^oC to 800 ^oC

900 ^oC to 1200^oC

1250 ^oC ti 1400 ^oC

1000 to 1100 ^oC

The electron gain enthalpy of chlorine is -349 Kj mol-1 ionization energy of Cl would be.

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-349 kJ mol -1

349 kJ mol-1

-698 kJ mol-1

698 kJ mol-1

The most reactive alkali metal among the following is

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Li

Na

Cs

Rb

The hybridization of sulphur in sulphur dioxide is.

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sp

sp2

sp3

dsp2

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