Question # 1

The destiny of a gas is directly proportional to pressure, inversely proportional to temperature and directly proportional to:

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Viscosity

Molar mass

Momentum

All of above

Halogens form halogen acids. HF is the weakest among all of them This is due to the reason that

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fluorine is a very small-sized atom

fluorine is highly electronegative atom

there is strong hydrogen bonding in HF

the polarity of HF bond is less

How many zones through which charge passes in a rotary kiln.

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3

4

5

6

Reason of pollution are:

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Population and urbanization

Transportation

Industrialization

All of these

All gases can be compressed by:

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Keeping constant pressure

Decreasing pressure

Increasing pressure

None of above

The pH range of acid rain is?

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7-6.5

6.5-6

6-5.6

Less than 5

Enthalpy of formation of one mole of ionic compound form gaseous ion under standard condition is called

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Gibb's energy

Bond energy

Lattice energy

The pH range of the acid rain is

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6.5 - 6

Less than 5

8 - 7.5

7 - 6.5

Example of basic essential amino acids

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Arginine

Histidine

Lysine

All of the above

Some of crystals are good conductors of heat and electricity, they may be

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ionic in nature

of metallic character

covalent in nature

of molecular nature

Oxides of sulphur react in atmosphere by various reactions to form:

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sulphates

sulphites

sulphides

sulphate aerosols

Which of the following is a typical transition metal?

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Sc

Y

Ra

Co

The oxidation number of chromium in K₂Cr₂O₇is

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14

12

6

None of these

The tendency of atoms to attain a maximum of eight electrons in the valence shell is known as:

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Duplet rule.

Triad rule.

Octet rule.

Tetrade rule.

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Rate = k[FeCl₃] [Kl]²

Rate = k[Fe⁺³][Cl^-1] [Kl]

Rate = k[Fe⁺³] [Cl^-1][K;]

Rate = k[Kl]³[FeCl₃]°

The theory of chemical bonding has been a major problem of:

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Modern Physics.

Modern Chemistry.

Modern Biology.

Mechanics.

Boiling point of acetic acid is ^oC

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116

117

118

119

The structure of benzene is

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Hexagonal

Pyramidal

Square planer

Tetrahedral

Boric acid cannot be used:

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An antiseptic in medicine

For washing eyes

In soda bottles

For enamels and glazes

For effective collisions the molecules slow down before collision and their kinetic energy decreases which results in increase in their

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Activation energy

Average energy

Potential energy

Collisions frequency

The substance added in the paints for improving the mechanical properties is called

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Pigment

Filter

Stabilizer

Binder

50 cm³of 0.05 molar nrea (N₂H₄CO) solution has % W/N concentration

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6%

3%

0.3 %

0.6 %

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