Question # 1

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 of the following equations represents the action of heat on NaHCO₃

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Which of the following is the hardest metal among following

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Li

Na

Rb

K

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

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Barium

Iodine

Lead

Oxygen

Which of the following form normal oxide

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K

Li

Na

None

The structure of white phosphorus is

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Square planar

Pyramidal

Tetrahedral

Trigonal planer

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

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Be

Mg

Ca

Sr

Bond angle is minimum for

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H₂O

H₂S

H₂Se

H₂Te

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

Which of the following is not the reactions of lithium

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Sulphuric acid reacts with PCl₅to give

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Thionyl chloride

Sulphur monochloride

Sulphuryl chloride

Sulphur tetrachloride

Plaster of pares is obtained by heating

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Gypsum

Epsom

Lime stone

Dolomite

The most acidic of the following compounds is

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P₂O₃

Sb₂O₃

B₂O₃

As₂O₃

Identify the incorrect statement with respect to ozone

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Ozone is formed in the upper atmosphere by a photochemical reaction involving dioxygen

Ozone is more reactive than diaoxygen

Ozone is diamagnetic whereas dioxygen is paramagnetic

Ozone protects the earth's inhabitants by absorbing gamma-radiations

Phosphorus pentoxide finds use as

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An oxidizing agent

A reducing agent

A bleaching agent

A dehydrating agent

Which salt is used for the treatment of hyperacidity in stomach

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NaCl

KCl

NaHCO₃

Na₂CO₃

Which property is not present in Al?

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Reacts with acid

Reacts with bases

Changes litmus paper

Changes methyle orange colour

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

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Na₂CO₃

NaHCO3

NaOH

NaOCl

Which of the following elements is most metallic?

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P

As

Sb

Bi

Which is not the form of silica?

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Amethyst quatz

Rose quatz

Smoky

None of these

Which of the following phosphorus is most reactive?

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Red phosphorus

White phosphorus

Scrlet phosphorus

Violet phosphorous

Lime, calcium oxide, is used in agriculture for

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Adding ca metal in soil

Making soil acidic

Neutralizing acidic soil

Adding oxygen to soil

What is chrome yellow?

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Pbo

Pb₂O

PbCrO₄

Pb₃O₄

Which of all following compound is not possible

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Which colour is imparted by sodium

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Yellow

Violet

Red

Crimson

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

Sodium is never found free in nature because of its

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Chemical reactivity

Small ionic size

Small atomic volume

None of these

Which of the following salt is used as purgative

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CaSO₄

MgSO₄

BeSO₄

NaCl

Which element forms an iron with charge 3+?

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Berylium

Aluminium

Carbon

Silicon

Which of the following is acidic?

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SO₃

N₂O

BeO

HgO

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ECAT Chemistry Chapter 14 Group IIIA & IVA Elements Online Test MCQs With Answers

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