Question # 1

Which pair of the gases doesn't obey Dalton's Law of partial pressures

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H₂and O₂

N₂and O₂

H₂S and H₂

NH₃and HCl

Lonic solids are characterized by:

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low melting points

_{good conductivety in solid state}

high vapour pressures

solubility in polar solvents

The lattice energy of NaCl is

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787 j/ mole

790 kj/mol

780 kJ/ mol

-787 kI / mole

According to Hess's law, the enthalpy change for a reaction

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Depends on path

Independent of the path

The sum of ∆E and ∆H

None of these

Which one of the following is not associated with SN2 mechanism

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100 % inversion of configuration

Tertiar alkyI halides

2nd order kinetics

Change of hy bridization from sp³ to sp² in transition state

Calendar stock is process in paper making in which

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Moisture is removed

Pulp is spreaded over fabric or screen

Paper thickness is removed

Paper is wounded in the form of reel

[Ti (H20)6]3+ ion isin colour.

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Yellow

Blue

Violet

Red

In which molecule. all atoms are coplanar?

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CH4

BF3

NH3

PH3

Carbon Monoxide is:

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colouriess

orderless

high toxic

All of these

The pH range of the acid rain is

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7 - 6.5

6.5 - 6

6 - 5.6

Less than 5

One dm3 of H2 and O2: has different masses but no. of particles are

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same

H2 has greater

different

O2 has greater

DNA has deoxyribose, a base and the third component is

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Phosphoric acid

Ribose

Adenine

Thymine

The number of subatomic particles in atoms sidcovered is more than:

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110

100

125

90

The negatively charged particles are called

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Cation

Radical

Anion

Positron

The unit of rate constant is the same as that of the rate of reaction in :

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First order reaction.

Second order reaction.

Zero order reaction.

Third order reaction.

Which of the following cannot conduct electricity :

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NaCl fused.

NaCl(aq)

NaCl(Solid)

Both (b) and (c)

Which compound is more soluble in water

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C₂H₅OH

Benzene

CH₃OCH₃

Hexane

Which of the following is the most suitable method for removing the traces of water from ethanol?

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Reacting with Na metal

Passing dry HCl through it

Distilling it

Reacting with Mg

The potassium fertilizers are preferred for horticulture, tobacco and potatones, which of the following is popular potassium fertilizer

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Potassium oxide

Potassium chloride

Potassium sulphate

Potassium nitrate

General formula of carbocyclic acids is:

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RCOH

RCOR

RCOOR

R-OH

Electrons arranged in orbitals according to the increasing order of their n + l values, this rule is named as

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Hund's rule

Heisenberg's principle

Paulit exclusion principle

Auf bau principle

For the above reaction the relationship b/w k_c and k_p will be :

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K_p = K_cRT

Kp = K_c(RT)_-1

K_p = K_c(RT)_-2

K_c = K_p

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