Question # 1

Which of the following hydroxides has the maximum solubility in water.

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Mg (OH)2

Ca (OH)2

Sr (OH)2

Ba (OH)2

An ionic compound X + Y - is most likely to be formed if

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Ionization enthalpy of X is high electron gain ethalpy of Y is low

Ionization enthalpy of X is high electron gain enthalpy of Y is high

Ionization enthalpy of X is low,electron gain enthalpy of Y is low

Ionization enthalpy of X is low electron gain enthalpy of Y is high

Which of the following pentahalides is not formed.

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NF5

PF5

AsF5

BiF5

When a lead a storage battery is discharged .

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SO2 is evolved

PbS is consumed

Pb is formed

H2SO4 is consumed

When 0.01 moles of NaOH are added to a buffer solution, its pH changes from 4.745 to 4.832 WHAT IS ITS.

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0.115

0.900

0.015

0.215

Graphite is a good conductor of electricity because is.

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Has sp2 hybridized carbon stoms

Has free electrons

Is crystalline

Has free atoms

Variable electrovalency is due to the following reasons.

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Unstable configuration of core

Inset electron pair effect

All of above

None of above

Used for sterilizationof drinking water

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F

Br

Cl

I

Which of the elements of group II A has the highest value of IE.

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Mg

Be

Ca

Sr

The state of hybridization of Xe in Xe F6 are

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sp2

sp3

sp3 d

dsp3

Gold dissolves in aqua regia forming

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AuCl

Au(NO3)3

AuCl3

HAuCl4

Which of the following is the most abundant alkaline earth metal.

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Be

Mg

Ca

Sr

Which of the following species have undistributed octahedral structure.

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SF6

PF6

Si F₆^2-

XeF6

Which ionization Potential in the following equations involves the greatest amount of energy.

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Na = Na+ + e

K = K+ +e

C2+ = C3+ +e

Ca+ = Ca2+ + e

The coordination number of closely packed hexagonal is.

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4

6

8

12

If steel is heated to a temperature well below red heated and is then cooled slowly the process is called.

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Annealing

Quenching

Tempering

Nitriding

Which of the following is not true of ozone.

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It is a strong electilizing agent

It attacks organic compounds containing carbon carbon double bond

Its molecular is linear and has two different O-O bond lengths

It is more powerful oxidising agent at molecular oxygen

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

Which among the following is insoluble in water.

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LiOH

KOH

NaOH

RbOH

Which of the following state is not true with respect to copper.

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it is malleable and ductile

It is a best conductor of heat and electricity

It forms alloys easily

Moltan copper absorbed carbon dioxide

Electron gas theory fails to explain

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Specific heat of metals

Electrical and thermal conductivity

Paramagnetic behavior of metals

All of the above

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