Question # 1

Hybridized in carbon is:

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sp

sp²

sp³

d²sp

Which one of the following equations represent the reaction that occurs when calcium nitrate is heated strongly

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______ is used in breathing equipments for mountaineers and in space craft

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Li₂O

BeO

N₂

KO₂

Calcium carbide reacts with water to produce

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Acetylene

Methane

Ethylene

Ethane

The alkali metals form

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Ionic bond

Covalent bond

Co-ordinate bond

H-bond

The element caesium bears resemblance with

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Ca

Cr

Rubidium

None of the above

In the earth crust sodium is

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2.50%

2.30%

2.40%

3.50%

Dipole moment of CO molecule is:

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0.0

1.112 D

0.112 D

2.112 D

Which of the following oxides is peroxide?

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Na₂O₂

MnO₂

BaO

SO₂

The chemical formula of chile salt peter is

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Na₂CO₃

KNO₃

NaNO₃

NaNO₂

The oxidation number of each element of group l-A is

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0

+1

+2

-1

The oxyacids of phosphorus in which phosphorus has the lowest oxidiation state is

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Hypophosphorus acid

Orthophosphorus acid

Pyrophosphorus acid

Metaphosphorus acid

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

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1

2

3

4

Sulphuric acid reacts with PCl₅to give

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Thionyl chloride

Sulphur monochloride

Sulphuryl chloride

Sulphur tetrachloride

The chemical formula of Epson salt is

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MgSO₄

MgCl₂

MgSO₄. 7H₂O

MgCl₂. 7H₂O

Alkaline earth metals posses two electrons in their outermost

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F-orbital

D-orbital

S-orbital

P-orbital

Aluminium oxide is:

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Acidic oxide

Basic oxide

Amphoteric oxided

None of these

All the following decompose easily on heating to give oxygen except

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Lead nitrate

Potassium chlorate

Mercuric oxide

Manganese dioxide

White P when boiled with strong solution of caustic soda produces

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Phosphine

Posh acid

Phosphorous acid

None

BiCl₃on hydrolysis forms a white precipitate of

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Bismuthio acid

Bismuth oxychloride

Bismuth pentachloride

Bismuth hydroxide

Tincal is a mineral of:

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Al

B

Si

C

Which shows maximum catenation property?

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S

Se

Te

O

Baking powder has which one of the following formula

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Na₂CO₃

Na₂SO₄

NaHCO₃

K₂CO₃

When SO₂is passed through acidified K₂Cr₂O₇solution

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The solution turns blue

The solution is decolourised

SO₂is reduced

Green Cr₂(SO₄)₃is formed

What is the formula of asbestos?

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CaMg₃(SiO₃)₄

CaSiO₃

Na₂SiO₃

Mg₃H₂(SiO₃)₄

Which of the following is not the reactions of lithium

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What is chrome yellow?

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Pbo

Pb₂O

PbCrO₄

Pb₃O₄

Which oxide of nitrogen is obtained on heating ammonium nitrate at 250° C?

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Nitric oxide

Nitrous oxide

Nitrogen dioxide

Dinitrogen tetraoxide

Red P can be obtained form white P by

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Heating it with a catalyst in an inert atmosphere

Distilling it in an inert atmosphere

Dissolving it in CS₂and crysllizing

Melting it ad pouring the liquid into water

Which metal of Group-II A of the periodic Table, will form the least ionic chloride

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Be

Mg

Ca

Sr

Which one of the following does not belong to alkaline earth metals

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Be

Ra

Ba

Rn

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