Question # 1

What element is not essential for the growth of plants and not required in the fertilizers?

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nitrogen

potassium

phosphorus

barium

The one atmospheric pressure of air in term of pound per square inches is

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101.325

1.01325

760

14.7

Which of the following has positive value of enthalpy

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Neutralisation

Atomization

combustion

All of the above

Men residence time of methane in atmosphere in years is:

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1-7

2-7

3-7

4-7

The degree of unsaturation in fats or oils is usually measured by numbers of grams of iodine required by 100 grams of fat, this is called

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oil number

saturation number

iodine number

un saturation number

If an endothermic reaction is allowed to take place very rapidly in air, the temperature of the surrounding air will

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Remains constant

Increase

Decrease

Either increase or decrease

One Joule is equivalent to

Point out the substance which has maximum vapour pressure at a given temperature?

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Acetone

Water

Ethanol

Acetic acid

Proteins have linkage between amino acids

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imide

amide

ester

ether

When graph is plot between P and 1/V at constant temperature. A straight line obtains which move toward ______ when temperature increase

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Pressure axis

Volume axis

1/V axis

1/P axis

Ozone is most of the tropical regions acts as a pollutant and causes

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Damages to eyes

Aggravates asthma

Chest discomfort

All of these

Which one of the following statements is wrong for gases?

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gases do not have a definite shape and volume

volume of the gas is equal to volume of container confining the gas

confirmed gas exerts uniform pressure on the walls of its container in which it is enclosed

mass of gas cannot be determined by weighing a container in which it is enclosed

Isotopes differ in

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properties which depend upon mass

arrangement of electrons in orbitals

chemical properties

the extent to which they may be affected in electric fields

Hydrogen chloride molecule contains

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Covalent bond

Double bond

Co-ordinate bond

Electrovalent bond

Which of the following is a typical transition metal

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Sc

Y

Ra

Co

Equal volumes of 0.1 M AgNO₃and 0.2 M NaCl are mixed. The concentration of NO^-₃ions in the mixture will be

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0.1 M

0.05 M

0.2 M

0.15 M

Objects of the size of an atom can be observed in

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An electron microscope

An x-ray spectrum

Atomic absorption spectrum

A visible spectrum

In the ground state of an atom the electron is present

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In the nucleus

In the second shell

Nearest to the nucleus

Farthest from the nucleus

Which of the following fibres are made of polyamides?

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Dacron

Orlon

Nylon

Rayon

Which of the following synthetic phosphorous fertilizers is marked as super phosphate

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Calcium dihydrogen phosphate

Appetite

Calcium phosphate

Wavellite

In the modern periodic table the elements are placed in the ascending order of their

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Atomic masses

Melting points

Boiling points

Atomic numbers

The order of distance between the various Bohr orbits is

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r₂- r₁> r₃- r₂> r₄- r₃> ......

r₁> r₂> r₂- r₃> r₄-r₃> .....

r₂-r₁= r₃- r₂= r₄- r₃> .....

r₂- r₁> r₃- r₂< r₄- r₃< ....

Interstitial compounds have

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Half formula

Fixed formula

Indefinite formula

None

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