R4RIN – MCQs, Mock Tests | CBES Board Class 9 Solutions Multiple Choice Questions CLASS 9

Bypassing hydrogen gas through vegetable oil it is converted in to

1. butter
2. milk
3. ghee
4. condensed milk

✅ Correct Answer: 3

Fog is a solution to

1. air in water vapors
2. air in air
3. vapors in vapors
4. water vapors in air

✅ Correct Answer: 4

To prepare ammonia gas the gaseous mixture of

1. hydrogen and chlorine is used
2. hydrogen and nitrogen is used
3. hydrogen and helium is used
4. hydrogen and iodine is used

✅ Correct Answer: 2

The solution of copper and zinc forms

1. sodium
2. mercury
3. brass
4. silver

✅ Correct Answer: 3

The number of moles of solute dissolved per dm3 of the solution is

1. molality
2. percentage
3. concentration
4. molarity

✅ Correct Answer: 4

A mixture that has a uniform composition throughout is called

1. saturated solution
2. super saturated solution
3. solution
4. solvent

✅ Correct Answer: 3

The solution of mercury with other metals is called

1. amalgam
2. saturated solution
3. supersaturated solution
4. unsaturated solution

✅ Correct Answer: 1

Solubility is the amount of solute dissolved in

1. 50 g of solvent
2. 100 g of solvent
3. 250 g of solvent
4. 200 g of solvent

✅ Correct Answer: 2

At a particular temperature the solution which cannot dissolve more solute is called

1. saturated solution
2. saturated solution
3. unsaturated solution
4. aqueous solution

✅ Correct Answer: 1

Commercially concentrated HCl is

1. 0.4
2. 0.5
3. 0.37
4. 0.8

✅ Correct Answer: 3

olid solutions of metals are called

1. alloys
2. amalgams
3. saturated solutions
4. supersaturated solution

✅ Correct Answer: 1

The mass of NaOH present per dm3 of 0.25M NaOH solution is

1. 10 g
2. 8 g
3. 5 g
4. 2 g

✅ Correct Answer: 1

In solutions the particles are

1. invisible
2. visible by naked eye
3. visible by ordinary microscope
4. visible by electron microscope

✅ Correct Answer: 1

The concentration of a dilute solution is

1. high
2. very high
3. same
4. low

✅ Correct Answer: 4

In amalgams the solvent is

1. gas
2. liquid
3. solid
4. none of above

✅ Correct Answer: 3

The substance present in a lesser amount in solution is

1. solute
2. solvent
3. aqueous solvent
4. none of above

✅ Correct Answer: 1

When the tiny particles of a substance are dispersed through a medium then the mixture is called

1. alloys
2. amalgams
3. suspension
4. colloid

✅ Correct Answer: 4

The particle size in suspension is

1. less than 103 nm
2. 102 nm
3. greater than 103
4. 10 nm

✅ Correct Answer: 3

The molarity of solution which contains 40 g urea dissolved in 500cm3 is

1. 1.2 M
2. 1.389 M
3. 1.334 M
4. 1.5 M

✅ Correct Answer: 3

An unsaturated solution

1. cannot dissolve more solute
2. cannot add more solvent
3. can add more solute
4. none of above

✅ Correct Answer: 3

The concentration of the solution is the quantity of

1. solvent in solute
2. solute in given solvent
3. gas dissolved in liquid
4. none of above

✅ Correct Answer: 2

Colloids can

1. scatter light
2. not scatter light
3. absorb heat
4. evolve heat

✅ Correct Answer: 1

When NaCl is dissolved in water the negative end of water molecules is attracted towards

1. Cl
2. H
3. He
4. Na

✅ Correct Answer: 4

Solutions that contain solid solutes in liquid solvents are called

1. liquids in solids
2. solids in liquids
3. solids in solids
4. solids in gas

✅ Correct Answer: 2

The solubility of Na2SO4

1. increases with increase in temperature
2. decreases with increase in temperature
3. no effect on solubility with change in temperature
4. none of above

✅ Correct Answer: 2

In the presence of crystals of solute a supersaturated solution is

1. not stable
2. stable
3. cannot be made
4. none of above

✅ Correct Answer: 1

Mass of solute dissolved in 100g of a solution refers to

1. percentage of solution
2. molarity of solution
3. molality of solution
4. none of above

✅ Correct Answer: 1

The methanol and water are

1. miscible
2. non miscible
3. forms saturated solution
4. forms supersaturated solution

✅ Correct Answer: 1

In the air the nitrogen gas acts as

1. solute
2. solvent
3. gaseous solute
4. aqueous solute

✅ Correct Answer: 2

The only liquid metal at room temperature is

1. sodium
2. iron
3. mercury
4. aluminum

✅ Correct Answer: 3