Question # 1

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

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

The following has zero valency

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Na

Be

AI

Kr

Portland cement is manufactured by using

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Limestone,clay and sand

Limestone,gypsum and sand

Limestone,gypsum and alumina

Limestone,clay and gypsum

How many kinds of space lattices are possible in a crystal?

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23

7

230

14

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

Which one of the following elements occurs free in nature?

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N

P

As

Sb

Magnesium keeps on burning in

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N₂

CO₂

N₂O

N₂ as well as CO₂

ΔH_{Neutralisation} is always

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Positive

Negative

Zero

Positive or negative

Most common reactions of benzene and its derivatives are

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Electrophilic addition reactions

Electrophilic substitution reactions.

Nucleophilic addition reactions

Nucleophilic substitution reactions

The kinetic theory of gases predicts that total kinetic energy of a gaseous assembly depends on

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Pressure of the gas

Temperature of the gas

Volume of the gas

Pressure temperature and volume of the gas

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