Question # 1

Which one is nitrogen fertilizer among the following:

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calcium sulphate

urea

magnesium carbonate

potassium phosphate

Soda lime is often employed to remove both

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H2O and NO2

CO2, and NO2,

H2O and CO2

H2S and CO2

The crystal system are of

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7 types

10 types

5 types

8 types

Amount of fresh water used by agriculture is

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2%

23%

69%

97%

CFC's are known to cause depletion of ozone layer therefore their use has been banned in refrigerators and air conditioners. Which alternate compound may be suitable to replace CFC

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CCl₄

CHCl₃

CH₃- CH₂- CH₂- CH₃

CHCl₂- CHF₂

Type of polymer formed by the polymerization of two monomers is:

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homopolymer

copolymer

ter polymer

All of these

Vapour pressure of a substance does not depend upon:

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physical state of matter

temperature

intermolecular forces

surface area

Which of following is oxidation state of oxygen in peroxides?

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-2

1/2

-1

+2

Aldehydes are easily oxidized to corresponding carboxylic acids in the presence of:

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Strong oxidizing agents

Highly strong oxidizing agents

Tollen's reagent

Tollen's reagent and Fehling solution

For a gas the isotherm is the graph between

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V and T

T and P

n and T

P and V

Macromolecules are classified:

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inorganic

organic

biopolymer

synthetic

Water shows maximum density at

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4°C

0°C

100°C

-4°C

The unit of rate of reaction is

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mole dm^-3

mole Kg^-1

moles dm^-3sec^-1

grams dm^-3

Which element has highest oxidation potential

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Li

Be

Ba

Ra

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Decrease in temperature favour more dissolution of the salt

Increase in temperature favour more dissolution of the salt

Lowering pressure favour more dissolution of the salt

Increasing pressure favour more dissolution of the salt

Methyl alcohol is not used

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As a solvent

A an anti-freezing agent

As a substitute for petrol

For denaturing of ethyl alcohol

Grignard reagent is not prepared in aqueous medium but prepared in ether medium because

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The reagent is highly reactive in ether

The reagent does not react with water

The reagent becomes inactive in water

The reagent reacts with water

Due to the bacterial action on wood it is converted into

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Peat

Lignite

Bituminous coal

Anthracite

Which of the following enzymes brings about the hydrolysis of fats?

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Urease

Maltase

Zymase

Lypase

Which one of the following particles has amass 1/1836 time, that of hydrogen?

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Neutron.

Proton.

Electron.

Positron.

Ricket is caused due to the deficiency of vitamin

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A

D

B

E

Macromolecules are

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organic molecules

High molecular mass molecules

Natural compounds

Rarely occurring molecules

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