Question # 1

Which is the most amphoteric?

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Na₂O

MgO

AI₂O₃

CaO

The alkali metal which is liquid at 15°C is

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K

Cs

Na

None

Which of the following process is used to separate insoluble particles from liquids?

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Separation

Filtration

Crystallization

Condensation

All the naturally occurring processes proceed spontaneously in a direction which lead to

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Decrease of entropy

Increase of enthalpy

Increase of free energy

Decrease of free energy

Variable valency is generally exhibited by

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Normal elements

Transition elements

Metallic elements

None of these

Dilute hydrochloric acid solution cannot be concentrated by boiling beyond

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11%

33%

44%

22%

Which of the following has greatest reducing power?

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HI

Hbr

HCI

HI

Crystal can be classified in to basic crystal habits

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7

4

14

3

For the carbylamine reaction we need hot alc.KOH and

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Any amin and chloroform

Chloroform and Ag powder

A primary amine and chloroform

A mono alkyl amine and trichlorom-ethane

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