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1 of 15

Which of the following factors most significantly affects the solubility of a solid solute in a liquid solvent?

The pressure of the gas above the liquid

The temperature of the solvent

The color of the solute

The size of the container holding the solution

2 of 15

What properties of duralumin make it more useful than its constituent metals?

A. It is heavy with a high melting point

B. It is malleable and has high density

C. It is strong and light

D. It is hard and ductile

3 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

4 of 15

The main ore of aluminium is

Haematite

Bauxite

Galena

Limestone

5 of 15

Which of the following is a common method used for the synthesis of addition polymers?

Condensation polymerization

Ionic polymerization

Chain-growth polymerization

Step-growth polymerization

6 of 15

Balance: Na2CO3 + HCl → NaCl + H2O + CO2

Na2CO3 + HCl → 2NaCl + H2O + CO2

Na2CO3 + 2HCl → 2NaCl + H2O + CO2

Na2CO3 + HCl → NaCl + H2O + CO2

Na2CO3 + 2HCl → NaCl + 2H2O + 2CO2

7 of 15

Which of the following raw materials would be required from the smelting of iron ore in a blast furnace?

A. CaCO 3

B. Zn(NO3)2

C. CuSO4

D. AICI3

8 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

9 of 15

Copper sulphate solution was electrolysed using the apparatus show above. Which of the following changes are observed?

A. The bulb lights and copper is deposited at both electrodes

B. the bulb lights and copper is deposited at the anode and disappears from the cathode

C. the bulb lights and copper is deposited at the cathode and oxygen liberated at the anode

D. the bulb lights and copper is deposited at the cathode and disappears from the anode

10 of 15

Which indicator turns blue in alkaline solution?

Methyl orange

Litmus

Phenolphthalein

Universal indicator

11 of 15

Which of the following is an example of a base?

HNO₃

NaOH

CO₂

HCl

12 of 15

Which of the following statements accurately describes a characteristic of synthetic polymers compared to natural biopolymers?

Synthetic polymers are always biodegradable and environmentally friendly.

Synthetic polymers have highly variable molecular weights and structures depending on the synthesis process.

Natural biopolymers are always more durable than synthetic polymers.

Synthetic polymers can be engineered to have specific properties and functionalities tailored for various applications.

13 of 15

Which of the following is an example of a salt?

NaCl

H₂SO₄

NH₃

CO₂

14 of 15

When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called

A. ionic bond

B. electrovalent bond

C. covalent bond

D. co-ordinate bond

15 of 15

Soaps clean surfaces on the principle based on?

A. viscosity

B. floatation

C. elasticity

D. surface tension

Chemistry Past Questions Practice

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