Question # 1

Which of the following is formed by the action of water on sodium peroxide?

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H₂

N₂

O₂

CO₂

The acid used in lead storage cells is

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Phosphoric acid

Nitric acid

Sulphuric acid

Hydrochloric acid

Which element among the following belongs to Group IV-A of the periodic table?

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Barium

Iodine

Lead

Oxygen

Hypo is used in photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

Electron affinity of sulphur is

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More than O and Se

More than O but less than Se

Less than O but more than Se

Equal to O and Se

Which carbonate of alkali metals is insoluble in water

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Na₂CO₃

K₂CO₃

Li₂CO₃

Cs₂CO₃

Which of the following salt is soluble in water

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CaCO₃

CaSO₄

MgSO₄

BaSO₄

Which of the following elements is most metallic?

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P

As

Sb

Bi

Which has soapy touch?

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Na2B4O7

H3BO3

Ca2B6O11

HBO2

The chemical formula of Epson salt is

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MgSO₄

MgCl₂

MgSO₄. 7H₂O

MgCl₂. 7H₂O

Phosphine is not obtained by the reaction when

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White P is heated with NaOH

Red P is heated with NaOH

Ca₂P₂reacts with water

PH₄l is boiled with water

Hybridized in carbon is:

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sp

sp²

sp³

d²sp

On alkali and alkaline earth metals down the group, there is decreasing trend in

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m.p.

b.p.

Ionization potentiall

All of these

Pb has inert pair of electrons:

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One

Two

Three

Four

LiOH ______ soluble than NaOH

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More soluble

Less soluble

Equally soluble

None

Which electronic configuration corresponds to an element of Group ||Z-A of the periodic table?

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1s, 2s², 2p⁶, 3s², 3p⁶, 4s²

1s², 2s², 2p⁶

1s², 2s², 2p⁶, 3s², 3p³

1s², 2s² , 2p⁶, 3s², 3p¹

Alkaline earth metals posses two electrons in their outermost

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F-orbital

D-orbital

S-orbital

P-orbital

What causes nitrogen to be chemically inert?

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Multiple bond formation in the molecule

Absence of bond distance

Short internuclear distance

High bond energy

All the following decompose easily on heating to give oxygen except

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Lead nitrate

Potassium chlorate

Mercuric oxide

Manganese dioxide

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

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

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Be

Ra

Ba

Rn

The chemical formula of magnesite is

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MgCl₂

Mg(HCO₃)₂

MgCO₃

None of these

Which one of the following is not an alkali metal

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Francium

Caesium

Rubidium

Radium

Which of the following compound is industrially prepared by the electrolysis of solution of NaCl

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Na₂CO₃

NaHCO3

NaOH

NaOCl

NaHCO₃is prepared by

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Down's process

Solvay's process

Nelson's process

None of these

The most acidic of the following compounds is

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P₂O₃

Sb₂O₃

B₂O₃

As₂O₃

The structure of white phosphorus is

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Square planar

Pyramidal

Tetrahedral

Trigonal planer

Bond angle is minimum for

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H₂O

H₂S

H₂Se

H₂Te

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

Sodium forms largely

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Normal oxides

Per-oxides

Superoxides

None of these

The acid which has a peroxy linkage is

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Sulphurous acid

Pyrosulphuric acid

Dithionic acid

Caro's acid

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