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NAT I Engineering Chemistry MCQs With Answers

Question # 1

Sodium thiosulfate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behaviour

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Question # 2

Which one of the following compounds does not exist?

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NCI₅

AsF₅

SbCI₅

PF₅

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Question # 3

Hybridization explain the------- of orbitals

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Type of Bonding

Shapes

Shape and Type of bonding

None of above

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Question # 4

An exothermic reaction is one in which the reacting substances

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Have more energy than the products

Have less energy than the products

Have the same energy as the products

Are at a higher temperature than the products

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Question # 5

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

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Question # 6

How many moles of Helium gas occupy 22.4 L at 0^oC at 1 atm.Pressure?

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0.11

0.90

1.0

1.11

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Question # 7

The structure of XeF₆

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Distorted octahedral

Pyramidal

Tetrahedral

None of the above

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Question # 8

The dimension of rate constant of a second order reaction involves

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Neither time nor concentration

Only time

Time and concentration

Time and square of concentration

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Question # 9

Which of the following has least mass?

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2 gram atom of nitrogen

3 x 10²³ atoms of C

1 mole of S

7.0 g of Ag.

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Question # 10

Which has the largest radius?

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CO³⁺

Mn³⁺

Fe³⁺

Cr³⁺

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Question # 11

Ammonia gas used directly as a fertilizer is injected into the soil at a depth of about

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Two inches

Three inches

Five inches

Six inches

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