Solved Chemistry MCQS Set 2

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Solved Chemistry MCQS


According to MO theory, the species O+2
Stability lower then O2
Three unpaired electrons
Diamagnetic character
Bond order of 2.5

Which metal is protected by a layer of its own oxide?
Fe
Al
Ag
Au

Rusting of iron is catalysed by
Zn
H+
Fe
O2

Which for the following has greatest reducing power?
HCl
HBr
Hl
Hl

The order of reactivity of halogens in aliphatic substitution reactions is
Cl2 C12 > Br2
Cl2 > Br2 > F2
Br2 > C12 > F2
F2 > Br2 > C12

Variable valency is generally exhibited by
Metallic elements
Transition elements
Normal elements
None of these.

Outermost shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be
XY2
XY
X2Y3
X2Y

If one litre of air is passed repeatedly over heated copper and magnesium till no further reduction in volume takes place, the volume finally obtained would be approximately
800mL
10mL
Zero
200mL

Cannizzaro reaction is not given by
Acetaldehyde
Trimethyl acetaldehyde
Benzaldehyde
Formaldehyde.

Magnesium keeps on burning in
N2O
N2 as well as CO2
N2
CO2

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