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1 of 15

Rusting of iron requires

Oxygen only

Water only

Oxygen and water

Hydrogen

2 of 15

The solution of a sample in a tube will be identified as a chloride if it gives

A. a white precipitate on addition of AgNO3 and barium chloride solutions

B. a white precipiate when acidified with HCI, and then AgNO3 solution added

C. a white precipitate when acidified with dilute HNO3 and then AgNO3 solution added

D. a white precipitate when acidified with dilute H2SO4 and then barium nitrate solution added

3 of 15

Which of the following best describes the relationship between exothermic reactions and energy changes in a chemical system?

Exothermic reactions absorb energy from their surroundings, resulting in a decrease in temperature.

Exothermic reactions release energy to their surroundings, resulting in an increase in temperature.

Exothermic reactions do not involve any energy changes.

Exothermic reactions convert potential energy into kinetic energy without releasing heat.

4 of 15

The boiling point of a liquid depends on

Colour only

Intermolecular forces

Shape only

Mass number only

5 of 15

A chemical process in which there is a gain of electrons is known as?

A. Sublimation

B. Reduction

C. Oxidation

D. Distillation

6 of 15

Which of the following are chemical changes?

I. cooking of food
II. digestion of food
III. freezing of water
IV. water is heated up

A. I and II

B. I, II, and III

C. III and IV

D. all of the above

7 of 15

Which type of bond is formed when two atoms share electrons equally, resulting in a balanced distribution of electrical charge?

Ionic Bond

Polar Covalent Bond

Nonpolar Covalent Bond

Metallic Bond

8 of 15

Which of the following statements correctly describes the behavior of acids and bases in an aqueous solution?

Acids increase the concentration of hydroxide ions (OH-) in solution.

Bases decrease the concentration of hydrogen ions (H+) in solution.

Acids react with metals to produce hydroxides and hydrogen gas.

Bases have a pH less than 7.

9 of 15

Which of the following gases will diffuse fastest when passed through a porous plug?
[H = 1, C = 12, N = 14, O = 16]

A. Propane

B. Oxygen

C. Methane

D. Ammonia

10 of 15

The entropy and enthalpy of a system are a measure of

A. degree of disorderlinesss and heat content respectively

B. heat content and degree of disorderliness respectively

C. heat content of a system only

D. degree of disorderliness only

11 of 15

Which process involves loss of electrons?

Reduction

Oxidation

Neutralization

Hydrolysis

12 of 15

Helium atoms are chemically unreactive because

A. there are no electrons around the nucleus

B. the number of protons equals the number of electrons

C. there are equal number of protons and neutrons in the nucleus

D. the outer electron shell is completely filled

13 of 15

The periodic classification of elements is an arrangement of the elements in order of their

A. Atomic Weights

B. Isotopic Weights

C. Molecular Weights

D. Atomic Numbers

14 of 15

Which of the following synthetic polymers is commonly used in the production of plastic bottles and containers due to its excellent chemical resistance and durability?

Polystyrene

Polyethylene terephthalate (PET)

Polyvinyl chloride (PVC)

Polypropylene

15 of 15

What is observed when aqueous solutions of each of tetraoxosulphate (VI) acid, potassium trioxoiodate (V) and potassium iodide are mixed together?

A. A white precipitate is formed

B. A green precipitate is formed

C. The mixture remains colourless

D. The mixture turns reddish brown

Chemistry Past Questions Practice

Set Your Time in Minutes

There are 15 questions in total

Chemistry Past Questions Practice

minutes!

Rusting of iron requires

The solution of a sample in a tube will be identified as a chloride if it gives

Which of the following best describes the relationship between exothermic reactions and energy changes in a chemical system?

The boiling point of a liquid depends on

A chemical process in which there is a gain of electrons is known as?

Which of the following are chemical changes?

I. cooking of food
II. digestion of food
III. freezing of water
IV. water is heated up

Which type of bond is formed when two atoms share electrons equally, resulting in a balanced distribution of electrical charge?

Which of the following statements correctly describes the behavior of acids and bases in an aqueous solution?

Which of the following gases will diffuse fastest when passed through a porous plug?
[H = 1, C = 12, N = 14, O = 16]

The entropy and enthalpy of a system are a measure of

Which process involves loss of electrons?

Helium atoms are chemically unreactive because

The periodic classification of elements is an arrangement of the elements in order of their

Which of the following synthetic polymers is commonly used in the production of plastic bottles and containers due to its excellent chemical resistance and durability?

What is observed when aqueous solutions of each of tetraoxosulphate (VI) acid, potassium trioxoiodate (V) and potassium iodide are mixed together?

Chemistry Past Questions Practice

Set Your Time in Minutes

There are 15 questions in total

Chemistry Past Questions Practice

minutes!

Rusting of iron requires

The solution of a sample in a tube will be identified as a chloride if it gives

Which of the following best describes the relationship between exothermic reactions and energy changes in a chemical system?

The boiling point of a liquid depends on

A chemical process in which there is a gain of electrons is known as?

Which of the following are chemical changes? I. cooking of food II. digestion of food III. freezing of water IV. water is heated up

Which type of bond is formed when two atoms share electrons equally, resulting in a balanced distribution of electrical charge?

Which of the following statements correctly describes the behavior of acids and bases in an aqueous solution?

Which of the following gases will diffuse fastest when passed through a porous plug? [H = 1, C = 12, N = 14, O = 16]

The entropy and enthalpy of a system are a measure of

Which process involves loss of electrons?

Helium atoms are chemically unreactive because

The periodic classification of elements is an arrangement of the elements in order of their

Which of the following synthetic polymers is commonly used in the production of plastic bottles and containers due to its excellent chemical resistance and durability?

What is observed when aqueous solutions of each of tetraoxosulphate (VI) acid, potassium trioxoiodate (V) and potassium iodide are mixed together?

Which of the following are chemical changes?

I. cooking of food
II. digestion of food
III. freezing of water
IV. water is heated up

Which of the following gases will diffuse fastest when passed through a porous plug?
[H = 1, C = 12, N = 14, O = 16]