Question # 1

In N.W.F.P the phosphate fertilizers are produced at

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D.I.Khan

Haripur

Nowshera

Dargai

The maximum number of electrons in a subshell for whichι = 3 is

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14

10

8

4

The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water in

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-1.86°C

-3.72°C

+1.86°C

+3.72°C

Which is true for an element R present in group 13 of the periodic table?

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It is a gas at room temperature

It has oxidation state of +4

It forms R₂O₃

It forms RX₂

SO₂ and NO₂produce pollution by increasing

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Alkalinity

Acidity

Neutrality

Buffer action

A clathrate may be defined as a

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Cage compound

Liquid crystal

Mixture

Solid solution

Which of the following fluorides of xenon is impossible?

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XeF₂

XeF₃

XeF₄

XeF₆

Which of the following is different from the other three oxides?

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MgO

SnO

ZnO

Cr₂O₃

The spectrum of helium is expected to be similar to that of

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H

Li⁺

Na

He⁺

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

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Mercury

Lead

Nitrogen oxide

Sulphur oxide

White lead is

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Basic lead acetate

Acidic lead carbonate

Basic lead carbonate

Basic lead hydroxide

Which of the following alkali metal hydroxides is the strongest base?

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LiOH

NaOH

KOH

CsOH

The reagent which forms crystalline osazone derivation when treated with glucose is

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Fehling solution

Phenyl hydrazine

Benedict solution

Hydroxyl amine

Which of the following is a colligative property?

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Melting point

Osmotic pressure

Freezing point

Sublimation temperature

Which of the following possesses the highest melting point?

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Chlorobenzene

o- Dichlorobenzene

m-Dichlorobenzene

p-Dichlorobenzene

All the naturally occurring processes proceed spontaneously in a direction which lead to

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Decrease of entropy

Increase of enthalpy

Increase of free energy

Decrease of free energy

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