Question # 1

The formula of nitre is

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KNO₃

NaNO₃

NaCI

Na₂CO₃

At 500 K the equilibrium constant for reaction cis-C₂H₂CI₂ trans-C₂H₂CI₂ is 0.6. At the same temperature the equilibrium constant for the reaction trans-C₂H₂CI₂ cis-C₂H₂CI₂ will be

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0.60

1.67

0.66

2.6

One mole of a gas refers to

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The number of molecules in one litre of gas

The number of molecules in one gram of gas

The number of molecules contained in 12 grams of ¹²C isotope

The number of molecules in 22.4 liters of a gas at S.T.P.

Vital force theory was rejected by

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Berzelius

Kolbe

Wholer

Lavoiser

The credit of discovering neutron goes to

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Rutherford

Langmuir

Chadwick

Austen

Which of the following is different from the other three oxides?

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MgO

SnO

ZnO

Cr₂O₃

In which of the following elements +1 oxidation state is more stable than +3

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B

AI

Ga

Ti

Evaporation of water is

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An exothermic change

An endothermic change

A process where no heat changes occur

A process accompanied by chemical

The following has zero valency

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Na

Be

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Kr

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