Question # 1

Which one of the following compounds does not exist?

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NCI₅

AsF₅

SbCI₅

PF₅

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

Which one of the following elements occurs free in nature?

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N

P

As

Sb

According to MO Theory the species O⁺₂ possesses

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Bond order of 2.5

Three unpaired electrons

Diamagnetic character

Stability lower then O₂

Sodium thiosulfate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behaviour

An endothermic reaction is one in which

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Heat is converted into electricity

Heat is obsorbed

Heat is evolved

Heat is converted into mechanical work

When electricity is passed through molten AI₂O₃ + Na₃AIF₆ and 13.5 gms AI are deposited,the number of faraday must be

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0.5

1.0

1.5

2.0

Which is the most amphoteric?

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Na₂O

MgO

AI₂O₃

CaO

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

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