Question # 1

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

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B

AI

Ga

Ti

The alkali metal which is liquid at 15°C is

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K

Cs

Na

None

The unit of rate constant for a zero order reaction is

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Liter sec^-1

Liter mol^-1sec^-1

Mol liter^-1sec^-1

Mol sec^-1

The reference calomel electrode is made from which of the following?

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ZnCI₂

CuSO₄

Hg₂CI₂

HgCI₂

The most reactive compound for electrophilic nitration will be

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Benzyl chloride

Benzoic acid

Nitrobenzene

Chlorobenzene

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

The pore size of the filter paper depends upon

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Nature of the medium

Temperature of the medium

Size of the particles

Mass of the particles

The structure of XeF₆

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Distorted octahedral

Pyramidal

Tetrahedral

None of the above

The vapour density of a gas is 11.2 The volume occupied by 11.2 g of this gas at N.T.P is

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22.4 liters

11.2 liters

1 liter

2.24 liters

The credit of discovering neutron goes to

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Rutherford

Langmuir

Chadwick

Austen

The symbol of the element whose atoms have the outer most electronic configuration 2s² 2p³ is

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N

Li

P

Na

Which of the following is a colligative property?

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Melting point

Osmotic pressure

Freezing point

Sublimation temperature

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

Ethyl alcohol is industrially prepare from ethylene by

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Permanganate oxidation

Catalytic reduction

Absorbing in H₂SO₄followed by hydrolysis

Fermentation

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

Which for the following has greatest reducing power?

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Hl

HBr

HCl

Hl

Which of the following imparts violet colouration to non-luiminous flame of Bunsen burner?

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NaCl₂

BaCl₂

CaCl₂

KCl

Which species represents the electrpohile in aromatic nitrotaion?

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NO^-₂

NO⁺₂

NO2

NO^-₃

Ethyl chloride on treatment with aqueous alkali gives

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Ethane

Ethene

Ethanal

Ethanol

The last orbit of argon would have electrons

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8

18

2

6

Outermost shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be

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XY

X₂Y

X₂Y₃

XY₂

The vapour density of a gas is 11.2. The volume occupied by 11.2 g of this gas at N.T.P. is

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22.4 litres

11.2 litres

1 litre

2.24 litres

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