- A given amount of gas occupies 10.0dm5 at 4atm and 273°C. The number of moles of the gas present is [Molar volume of gas at s.t.p = 22.4dm 3
- A. 0.89 mol
- B. 1.90 mol
- C. 3.80 mol
- D. 5.70 mo
Reveal Answer
2. According to Charles’ law, the volume of a gas becomes zero at
- A. 0°C
- B. -100°C
- C. -273°C
- D. -373°C
Reveal Answer
3. A substance that is used as a ripening agent for fruits is
- A. Ethene
- B. Propane
- C. Methane
- D. Butane
Reveal Answer
4. The Sulphide which is insoluble in dilute hydrochloric acid is
- A. FeS
- B. CuS
- C. ZnS
- D. Na2S
Reveal Answer
5. What is the PH of 0.00 1 moldm3 solution of the sodium hydroxide
- A. 14
- B. 13
- C. 12
- D. 11
Reveal Answer
6. The type of bonding in [Cu(NH\(_3\))\(^4\)]\(^{2+}\) is
- A. coordinate
- B. electrovalent
- C. metallic
- D. covalent
Reveal Answer
7. Which of the following is an example of a chemical change?
- A. Dissolution of salt in water
- B. Rusting of iron
- C. Melting of ice
- D. Separating a mixture by distillation
Reveal Answer
8. To what temperature must a gas at 273k be heated in order to double both its volume and pressure?
- A. 298K
- B. 546K
- C. 819K
- D. 1092K
Reveal Answer
9. According to the Kinetic Theory an increase in temperature causes the kinetic energy of particles to
- A. Decrease
- B. Increase
- C. Be zero
- D. Remain constant
Reveal Answer
10. An element used in the production of matches is
- A. Nitrogen
- B. Aluminium
- C. Copper
- D. Sulphur
Reveal Answer
