Question # 1

Relative order of acidity of oxy acid

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HCIO > HCIO2 > HCIO3 > HCIO4

HCIO4 > HCIO3 >HCIO2 > HCIO

HCIO3 > HCIO2 > HCIO > HCIO4

HCIO2 > HCIO4 > HCIO3 > HCIO

In each period the element with lest electron affinity belongs to.

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Group 1

Group 14

Group 17

Group 18

In the purification of bauxite , the ore is fused with sodium carbonate in the process

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Baeyer's process

Hall's process

Serpeck's process

Any of above

Which of the following statements is false about transition metals.

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They form complexes

They show variable valency

All transition metal compounds are paramagnetic

They form coloured ions

Fluorine finds considerble use of DDFT which is used as.

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herbicide

Fungacide

Insecticide

Nomatocides

Which of the following alloys contains Cu and Zn

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Bronze

Brass

Gun metal

Type metal

Pig iron is also called.

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Cast iron

Steel

Wrought iron

Stainless steel

Among LiCl, BeCl2, BCl3, and CCl4 the covalent bond character follows the order.

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LiCl < Becl2< Bcl3 < CCl4

LiCl > BeCl2 < BCl3<CCl4

LiCl< Becl2 < BCl3 < CCl4

LiCl > Becl2 > BCl3 < CCl4

Which of the following elements of group 15 is a typical metal.

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P

As

Bi

Sb

Which among the following elements has the highest value of IE.

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Mg

Na

Ca

Sr

pKa value of hyponitrous acid is.

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-7.0

8.9

4.1

6.6

Ca H2 on reaction with water liberates

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H2

O2

Botha of these

None of these

Which element among the following cannot exhibit variable electronvalency

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₂₉Cu

₅₀Sn

₂₅ Mn

₃₈ Sr

A boy accidently splashes a few drops of conc. H2SO4 on his cotton shirt. A few minutes later, the splashed part blacken and holes appear.This is because the sulphuric acid.

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Heats up the cotton so that it burns

Dehydrates the cotton

Causes cotton to react with oxygen of the air

Removes the elements of water from cotton

The correct order of electron affinities is.

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C > Si, > Na > Ar

Si > Cl > Na > Ar

C > Na > Si > Ar

C > Si > Ar > Na

Which of the following parameter is not involved in calculations based on Born Haber Cycle.

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Ionization enthalpy

Electron gain enthalpy

Electronegativity

Bond dissociation energy

Pauling has suggested that the calculate of energy can be improved by considering.

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Screening effect

Polarization effect

Both A and B

None of abvoe

Bases and reducing agents are electron giving agents and also called as.

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Electrodotic

Electrophile

Nucleophile

None of above

Is a chain silicate

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Olivine

Tremolite

Beryl

Zeolite

The aluminium salt commonly used to stop bleeding is

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Aluminium sulphate

Potash Alum

Aluminium chloride

Aluminium fluroide

The pH of the 0.0032 M H2SO4 is.

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3.2

4.0

2.198

1.0

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