Question # 1

A current of 9.65 ampere flowing for 10 minutes deposits 3.0 g of the metal which is monovalent the atomic mass of the metal is

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10

50

30

96.5

On heating acetaldehyde with ammonical silver nitrate solution we get

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CH₃OH

Silver acetate

HCHO

Silver mirror

Rusting of iron is catalysed by

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Fe

O₂

Zn

H⁺

The number of unpaired electrons in the P-subshell of oxygen atom

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1

2

3

4

Gooch crucible used to filter the solution of

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H₂SO₄

HCI

KMnO₄

Both B & C

Which of the following halogens does not forms its oxyacids?

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Fluorine

Chlorine

Bromine

Iodine

The total pressure exerted by a number of non reacting gases is equal to the sum of partial pressure of the gases under the same conditions is known as

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Boyle's law

Charle's law

Avogadro's law

Dalton's law

Which of the following statement is correct if the intermolecular forces in liquids A, B and C are in the order A < B < C?

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B evaporates more readily than A

B evaporates less readily than C

A and B evaporates at the same rate

A evaporates more readily than C

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

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14

10

8

4

Inter molecular forces in solid hydrogen are

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Covalent forces

Van der Waal forces or London dispersion force

Hydrogen bonds

All of these

In which of the following elements +1 oxidation state is more stable than +3

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B

AI

Ga

Ti

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

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D.I.Khan

Haripur

Nowshera

Dargai

The pore size of filter paper depends upon

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Nature of the medium

Temperature of the medium

Size of particles

Mass of the particles

Isopropyl alcohol on oxidation forms

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Acetone

Ether

Ethylene

Acetaldehyde

Causticisation process is used for the preparation of

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Caustic soda

Caustic potash

Baryata solution

Slaked lime

Which of the following statements is correct with respect to the property of elements with increase in atomic number in the carbon family (group 14)?

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Their metallic character decreases

The stability of +2 oxidation state increases

Their ionization energy increases

Their atomic size decreases

Reaction of ethylamine with chloroform in alcoholic KOH produces

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CH₃OH

CH₃NC

C₂H₅NC

C₂H₅CN

Sulphure dioxide affects

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Cell wall

Plasmodesmata

All membrane systems

Nucleus

Which of the following is acidic?

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SO₃

N₂O

BeO

HgO

Enzymes are

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Proteins

Minerals

Oils

Fatty acids

Ozane is not

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An allotrope

A powerful oxidizing agent

Paramegnetic

a bent molecule

Hypo is used to photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

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