Question # 1

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

Which of the following gases shows more ideal behaviour at 0°C

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H₂

CH₄

He

NH₃

Pan is an irritant to human beings and it affects

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Eyes

Nose

Hair

Skin

Considering the physical properties of the gases, which of the following statements about particles of gas is not true. The particles

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orderly arranged

randomly moving

having wide spaces

causing pressure

Critical temperature of argon's gas is low. the reason is that

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it contains four lone pairs

it is mono atomic gas

it has as smell signed

its polarizability is low

A polymer of PVC having D.P 500 has molar mass:

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6300

63000

3150

31500

The ratio of close packed atoms to tetrahedral holes in cubic close packing is

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1 : 1

1 : 2

1 : 3

2 : 1

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

When the concentration of product is increased the instantaneous rate of reaction with reference to reactants will be

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Positive

Negative

the same

falling curve

The transition temperature of tin is

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95.5 C°

13.2 C°

13.2°C

128.5°

How many zones through which the charge passes in a rotary kiln?

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4

3

2

5

Caroxyl group has functional in it.

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one

two

three

four

Which of the following (1 M) conducts more electricity?

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Sulphuric acid

Boric acid

Nitric acid

Phosphorus acid

Which of the substances Na, Hg, S Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution?

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Na, Pt and graphite

Na and Hg

Pt and graphite only

Na and S only

Elements in which f-orbitals are in the process of completion are called

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Outer transition element

Inner transition elements

Non-tranistion elements

Radioactive elements

The orbital in Rutherford's model is

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Spiral

Circular

Both

None

The geometrical shape of a transition complexion is related to the state of hybridizing of the central atom. What is trigonal bipyramidal

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sp³

dsp²

dsp³

d²sp³

What is chrome yellow?

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Pbo

Pb₂O

PbCrO₄

Pb₃O₄

Which of the following in an example of reversible reaction

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IIB elements (Zn, Cd, Hg) and III B elements (Sc, Y and La) are

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Non typical transition element

Typical transition element

Normal elements

Inner transition element

The pH of 10^-3mole dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

Which of the followings is not a nulceophile

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OH^-

NH₃

C₂H₅O^-

Br₂

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