Acids, Bases and Salts+Gaseous and Liquid States

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Full marks:40 Pass marks:20
Date:2077/09/05 Day:Sunday
Time:5:00 to 6:00 PM

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Volume of 4.4 g of CO2 at N.T.P is:

1 point

22.4 L

2.24 L

224 L

44.8 L

Clear selection

Which of the following species is an acid and also a conjugate base of another acid?

1 point

HSO4-

H2SO4

OH-

H3O+

Clear selection

The atomic weight of helium is 4 times of hydrogen. Its rate of diffusion as compared to hydrogen is:

1 point

Twice

1/√2 times

√2 times

1/4 th

Clear selection

The constant R is:

1 point

work done per molecule

work done per degree molecule

work done per degree per mole

work done per mole

Clear selection

Sodium hydroxide is a strong base because:

1 point

It is highly ionized

It is highly soluble in water

It can neutralize strong acids

It contains OH- ions

Clear selection

In the reaction NH3+BF3→NH3→BF3, BF3 is:

1 point

Lewis acid

A lewis base

Neither a lewis acid nor a lewis base

A lewis acid and a also a lewis base

Clear selection

The van der waal's equation reduces itself to the ideal gas equation at:

1 point

High pressure and low temperature

Low pressure and low temperature

Low pressure and high temperature

High pressure and high temperature

Clear selection

Ionization of HCl in water results in the formation of:

1 point

H+ ion and Cl- ion

H3O+ ion and Cl- ion

H+ ion, OH- ion and Cl- ion

HCLO- ion

Clear selection

The conjugate base of NH2- is:

1 point

NH3

NH--

NH4+

N3-

Clear selection

For easily liquefiable gases like SO2, NH3 etc, the critical temperature is generally:

1 point

Low

High

Not certain

None of the above

Clear selection

Conjugate base of weak acid is:

1 point

Weak acid

Weak base

Strong base

None of the above

Clear selection

Conjugate base of weak acid is:

1 point

Weak acid

Weak base

Strong base

None of the above

Clear selection

The compound that is not a Lewis acid is:

1 point

BF3

ALCL3

BeCl2

None of the above

Clear selection

The conjugate base of HBr is:

1 point

H2Br+

H+

Br-

Br+

Clear selection

According to Lewis concept, an acid is a substance which:

1 point

Accepts proton

Accepts a lone pair of electrons

Donates proton

Donates a lone pair of electrons

Clear selection

Boiling point of liquid depends on all of the following factors except:

1 point

Viscosity of the liquid

External pressure

Volume of the liquid taken

vapour pressure of the liquid

Clear selection

Which of the following is the strongest conjugate base?

1 point

Cl-

CH3COO-

SO4--

NO2-

Clear selection

Which of the following is the strongest acid?

1 point

H3PO4

H2SO4

HNO2

CH3COOH

Clear selection

The rate of diffusion of methane at a given temperature is twice that of a gas X. The molecular weight of X is:

1 point

Clear selection

An element which can exist as +ve ion in acid solution and -ve ion in basic solution is called:

1 point

Acidic

Basic

Neutral

Amphoteric

Clear selection

Conjugate base of HCO3- is:

1 point

CO3--

H2CO3

H2O

CO2

Clear selection

The correct value of R is close to:

1 point

0.082 litre-K^-1 mol^-1

o.082 litre-atm K

0.082 litre-atm^-1 K mol^-1

0.082 litre^-1 K^-1

Clear selection

Which of the following can act both as Bronsted acid and a Bronsted base?

1 point

Na2CO3

OH-

HCO3-

NH3

Clear selection

Ammonia gas dissolves in water to give NH4OH. In the reaction, water act as:

1 point

An acid

A base

A salt

A conjugate base

Clear selection

300 ml of a gas at 27 degree celcius is cooled to -3 degree celcius at constant pressure, the final volume is:

1 point

540 L

135 L

270 L

350 L

Clear selection

The relative rate of diffusion of a gas( molecular weight=128) as compared to oxygen is:

1 point

2 times

1/4 times

1/8 times

1/2 times

Clear selection

Which is the strongest base among the following?

1 point

Mg(OH)2

KOH

NaOH

Al(OH)3

Clear selection

When an ideal undergoes unrestrained expansion, no cooling occurs because the molecules:

1 point

are above the inversion temperature

exert no attractive forces on each other

do work equal to loss in kinetic energy

collide without loss of energy

Clear selection

Which of the following is a colligative property?

1 point

Osmotic pressure

viscosity

surface tension

Boiling point

Clear selection

Volume of 0.5 mole of a gas at 1 atm pressure and 273 degree celcius is:

1 point

11.2 litres

22.4 litres

44.8 litres

5.6 litres

Clear selection

A closed flask contain water in all its three states; solid, liquid and vapour at 0 degree celcius. In this situation the average KE of water molecules will be:

1 point

Greatest in the solid state

Greatest in the vapour state

same in all three state

Greater in the liquid than in the vapour state

Clear selection

The conjugate acid H2PO4- is:

1 point

H3PO4

H2PO4-

PO4---

H3O+

Clear selection

Name:

Which of the following expressions at constant pressure represents Charle's law?

1 point

V∝1/T

V∝T

V∝1/T^2

V=d

Clear selection

Air at sea level is dense. This is a practical application of:

1 point

Boyle's law

Charle's law

Avagadro's law

Dalton's law

Clear selection

Which among following qualifies as Lewis acid?

1 point

NaF

NaCL

NH3

BeCl2

Clear selection

Which of the following mixture of gases does not obey Dalton's law of partial pressure?

1 point

O2,CO2

N2,O2

Cl2,O2

HCl,NH3

Clear selection

If two moles of an ideal gas at 546 K occupy a volume of 44.8 litres, the pressure must be:

1 point

2 atm

1 atm

3 atm

4 atm

Clear selection

Acetic acid is weaker than sulphuric acid because:

1 point

It is not corrosive like sulphuric acid

It ionises to a smaller degree

It decomposes at a lower temperature

It gives only one H+ per molecule

Clear selection

The strongest conjugate base is:

1 point

NO3-

Cl-

SO4--

CH3COO-

Clear selection

In the combination H3N-BCl3 act as an acid according to:

1 point

Arrhenious theory

Bronsted-Lowry concept

Lewis concept

None of the above

Clear selection

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