Question # 1

The boding which covalent molecules containing hydrogen and one of the small electronegative element such as O, For Mis called:

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ionic bonding

bridge bonding

H-bonding

metalic bonding

Acidification of soil can leach metal:

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Al

Hg

Pb

Ca

The structure of protein helps protein to

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be in proper shape

attach substrate

perform is function

All of these

The particles in solids are

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widely separated and moving randomly

widely separated not moving

moving randomly but not separated

close together and vibrating slightly

The original volume of a gas at 0° is 273 cm³at constant pressure, its volume at 273°C becomes

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zero cm³

546 cm³

446 cm³

346 cm³

Which of the following is a molecular formula of vinyl acetate

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C₄H₆O₂

C₂H₄O₂

C₄H₆O₃

None of these

The element with highest E°red

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N

F

O

CI

Sterols, vitamin D and terpenese belong to

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Simple lipids

Complex lipids

Derived lipids

None

Coagulation in the purification of water is carried out by

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Alum

NiSO₄

BaSO₄

CuSO₄

Per hydro cyclopentano phenathrene is the basic structure of all the:

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Proteins

vitamins

waxes

amines

Coal contains sulphur in it:

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1-3%

1-6%

1-9%

1-12%

Hydrogenation of vegetable oils is accelerated by Ni catalyst. The catalytic activity of Bi is increased by a promoter of activator which is

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Na and K

Na and Hg

Hg and Zn

Cu and Te

The percentage of which element in the organic compound is determined by the difference method

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Carbon

Hydrogen

Nitrogen

Oxygen

Red P can be obtained form white P by

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Heating it with a catalyst in an inert atmosphere

Distilling it in an inert atmosphere

Dissolving it in CS₂and crysllizing

Melting it ad pouring the liquid into water

0.5 mole of CH4and 0.5 mole of SO2gases have equal

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Volume

Mass in grams

Total number of atoms

Number of molecules

A ring contains 3 gram diamond. The number of C-atoms which a ring contains is

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3.01 x 10²³

1.5 x 10²³

6.02 x 10²⁴

3.01 x 10²⁴

N₂3H₂⇌ 2NH₃

_{Which of the following change will favorthe formation of more}NH₃at equilibrium in above reaction :

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By adding NH_3.

By removingH_2.

By decreasing pressure.

By increasing pressure.

Ethyl alcohol may be identified by

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Ring test

Iodoform test

Tollen's test

Bazeyer's test

The bond order for He₂molecule is

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zero

1/2

1

2

The forced which holds together two or more atoms or ions to form a large variety of compounds in called:

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A chemical bond.

An ionic bond.

A covalent bond.

A coordinate bond.

The alkaline earth elements have in their s-orbital

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One electron

Two electron

No electron

Three electron

Amino acids are buildng blocks of:

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protein

Carbohydrates

Lipids

fats

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