Question # 1

Which is litharge or massicot?

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PbO

Pb₂O

Pb₃O₄

PbO₂

The maximum number of electrons in the outermost shall of s-black elements is

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One

Two

Three

Four

Which of all following compound is not possible

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Phosphorus pentoxide finds use as

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An oxidizing agent

A reducing agent

A bleaching agent

A dehydrating agent

Alkaline earth metals are usually

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Reducing agent

Oxidizing agent

Amphoteric

Acidic

Al is the most element in earth crust:

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O

Si

Al

Pb

Which one of the following is not an alkali metal

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Francium

Caesium

Rubidium

Radium

Sometimes a yellow turbidity appears while passing H₂S gas even in the absence of II group radicals. This is because

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Sulphur is present in the mixture as impurity

IV group radicals are precipitated as sulphides

Of the oxidation of H₂S gas by some acid radicals

III group radicals are precipitated as hydroxides

Which of the following statement is not related to Solvay's process of Na₂CO₃

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Cheap materials

Pure product

Continuous process

Harmful by-products

Which one of the following pentafluorides cannot be formed?

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PF₅

AsF₅

SbF₅

BiF₅

The silver bromide in hypo (Na₂S₂O_{3) solution is}

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Soluble

Not soluble

Precipitated

Not effect

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

Which of the following is not the reactions of lithium

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Which of the following are electropositive in nature

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Alkali metals

Alkaline earth metals

Halogens

Alkali and alkaline earth metals

LiOH ______ soluble than NaOH

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More soluble

Less soluble

Equally soluble

None

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

What is the formula of asbestos?

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CaMg₃(SiO₃)₄

CaSiO₃

Na₂SiO₃

Mg₃H₂(SiO₃)₄

When ammonia is heated with cupric oxide, a molecule of ammonia will

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Gain 3 electrons

Lose 3 electrons

Gain 2 electrons

Lose 2 electrons

When a colourless gas is passed through bromine water only decolourisation takes place the gas is

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SO₂

HBR

HCl

H₂S

Which of the following elements is most metallic?

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P

As

Sb

Bi

Sulphuric acid reacts with PCl₅to give

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Thionyl chloride

Sulphur monochloride

Sulphuryl chloride

Sulphur tetrachloride

S-block elements consist of

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Alkali metals

Alkaline earth metals

Alkali and alkaline earth metals

None of these

Hybridized in oxygen is:

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sp

sp²

sp³

dsp³

CaC₂on hydrolysis form

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CH₄

C₂H₄

C₂H₂

C₆H₆

Which of the following salt is soluble in water

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CaCO₃

CaSO₄

MgSO₄

BaSO₄

Polyanion formation is maximum in

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Nitrogen

Oxygen

Sulphur

Boron

In the earth crust sodium is

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2.50%

2.30%

2.40%

3.50%

Sodium hexametaphophate is known as

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Calgon

Permutite

Natalite

Nitrolim

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

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NaHCO₃is commonly called

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Soda ash

Baking soda

Washing soda

None of these

Silicon atom is hybridized:

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sp

sp²

sp³

dsp²

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

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