Question # 1

Which of the following transition metal ions will have definite value of magnetic moment?

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Sc³⁺

Ti³⁺

Cu⁺

Zn²⁺

The chemical composition of white lead is

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Na₂CO₃

Pb₃O₄

Pb(OH)₂.2PbCO₃

PbO

Which one of the following compounds does not exist?

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NCl₅

AsF₅

SbCl₅

PF₅

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

The rotation of two carbon atoms joined by double bond would happened only if

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P_ibond is broken

Sigma bond is broken

Both bonds are broken

None of above

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

Which of the following method is most appropriate for the manufacture of methane?

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By reduction of CH2SL2

Wurtz reaction

Liquification of natural gas

None of these

Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBh₄or LiAH₄?

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1-Propanol

2-Propanol

2-Methyl2-Proponal

Ethanol.

Given below are some statements concerning formic acid, which of them is true?

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It is a weaker acid than acetic

it is a reducing agent

When its calcium salt is heated, it forms a ketone

It is an oxidizing agent

Each of following is true of white and red phosphours except that they

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Are both soluble in CS₂

Can be oxidized by heating in air

Consist of the same kind of atoms

Can be converted into one another

The credit of discovering neutron goes to

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Rutherford

Langmuir

Chadwick

Austen

What quantity of limestone (CaCO₃) on heating will give 56 kg of CaO?

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1000 kg

56 kg

44 kg

100 kg

Natural fertilizer provides potassium in the form of K₂O (potash)

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1.5 kg

3 kg

4.5 kg

6.5 kg

The formula of nitre is

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KNO₃

NANO₂

NaCl

Na₂CO₃

Which of the following is an example of body centred cube?

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Magnesium

Zinc

Copper

Sodium

Bond angle is minimum for

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H₂O

H₂S

H₂Se

H₂Te

A zero order reaction is one whose rate is independent of

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Temperature of the reaction

The concentration of the reactants

The concentration of the products

The material of the vessel in which the reaction is carried out

Which metal is protected by a layer of its own oxide?

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Al

Ag

Au

Fe

ΔH_{neutralisation}is always

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positive

Negative

Zero

Positive or negative

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

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D.I.Khan

Haripur

Nowshera

Dargai

Heating a micture of sodium benzoate and soda lime gives

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Benzene

Methane

Sodium benzoate

Calcium benzoate

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