Question # 1

In which molecule carbon atom is sp²hybridized

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CH₄

C2H₄

C₂H₂

None of the above

White lead is

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Basic lead acetate

Acidic lead carbonate

Basic lead carbonate

Basic lead hydroxide

Inert pair effect plays an important role in case of

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F

Al

Si

Tl

Gooch crucible is used for the filtration of precipitates having

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High Solubility

High concentration

High ignition temperature

Low Temperature

An endothermic reaction is one in which the reacting substances

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Have more energy than the products

Have less energy than the products

Have the same energy as the products

Are at a higher temperature than the products.

The order of reactivity of halogens in aliphatic substitution reactions is

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Br2 > C12 > F2

Cl2 > Br2 > F2

Cl2 C12 > Br2

F2 > Br2 > C12

Which of the following mineral does not contain Al?

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Cryolite

Mica

Feldspar

Fluorspar

Helium-oxygen mixture is used by deep sea divers in preference to nitrogen-oxygen mixture because

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Helium is much less soluble in blood than nitrogen

Helium is much less soluble in blood than helium

Under the sea nitrogen and oxygen react to give poisonous nitric oxide

Nitrogen is highly soluble in water.

Reaction of acids with alcohols is also known as

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Esterification

Saponification

Alkalization

None

Acetylene gives

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White ppt. with ammonical AgNO₃and red ppt. with ammonical Cu(NO₃)₂

White ppt. with ammonical AgNo_{3 and red ppt. with ammonical}Cu₂Cl₂

White ppt. with both

Red ppt. with both

The following has zero valency

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Na

Be

Al

Kr

When electricity is passed through moten Al₂O₃+Na₃AIF₆and 13.5 gms of Al are deposited, the number of faraday must be

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0.5

1.0

1.5

2.0

Bragg's law is given by equation

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nλ= 2θsinθ

nλ= 2 d sinθ

2 nλ= d sinθ

nλ= 1/2 d sinθ

Bond angle is minimum for

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H₂O

H₂S

H₂Se

H₂Te

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

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D.I.Khan

Haripur

Nowshera

Dargai

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

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LiOH

NaOH

KOH

CsOH

The movement of solvent molecules through a semipermeable membrane is called

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Electrolysis

Electrophoresis

Osmosis

Cataphoresis

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

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Fehling solution

Phenyl hydrazine

Benedict solution

Hydroxyl amine

Rusting of iron is catalysed by

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Fe

O₂

Zn

H⁺

Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH₄or LiAIH₄?

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1-Propanol

2-Propanol

2-Methyl-2-propanol

Ethanol

The rate of reaction between A and B increases by a factor of 100, and when the concentration with respect to A is increased 10 folds, the order of reaction w.r.t. A is

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10

1

4

2

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