Introduction to acids and bases

Which of the following metals can react with dilute hydrochloric acid to produce a gas that burns with a ‘pop’ sound?

1. (1)  Copper

2. (2)  Magnesium

3. (3)  Iron

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)

2. Consider the following reaction:
   CuCO3(s) + H2SO4(aq) --> CuSO4(aq) + Q(g) + H2O(l)

   Which of the following statements concerning this reaction are correct?

3. 1. (1)  A pale blue solution forms.

   2. (2)  The mass of CuCO3(s) decreases.

   3. (3)  Q(g) turns limewater milky.

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)

2. Which of the following ionic equations correctly represents the reaction between sodium hydrogencarbonate solution and dilute hydrochloric acid?

• 2. Na+(aq) + Cl-(aq) ->

  3. NaCl(aq)

• 2. NaHCO3(aq)+ H+(aq)->

  3. Na+(aq) + CO2(g) + H2O(l)

• 2. HCO3-(aq) + H+(aq) ->

  3. CO2(g) + H2O(l)

• 2. HCO3-(aq)+HCl(aq) -> Cl-(aq) + CO2(g) + H2O(l)

2. Which of the following substances can turn moist red litmus paper blue?

   1. (1)  Oven cleaners

   2. (2)  Toilet cleaners

   3. (3)  Window cleaners

• 1. (1) and (2) only

• 1. (1) and (3) only

• 1. (2) and (3) only

• 1. (1), (2) and (3)

2. Which of the following solutions can react with excess sodium hydroxide solution to give a white precipitate?

   1. (1)  Magnesium nitrate solution

   2. (2)  Zinc nitrate solution

   3. (3)  Copper(II) nitrate solution

• 1. (1) only

• 1. (2) only

• 1. (1) and (3) only

• 1. (1), (2) and (3)

2. Heating a solution mixture of ammonium chloride and sodium hydroxide will produce a gas. Which of the following statements concerning this gas are correct?

   1. (1)  It has a characteristic pungent smell.

   2. (2)  It turns moist red litmus paper blue.

   3. (3)  It relights a glowing splint.

• 1. (1) and (2) only

• 1. (1) and (3) only

• 1. (2) and (3) only

• 1. (1), (2) and (3)

2. Which of the following statements concerning aqueous ammonia are correct?

   1. (1)  Its basicity is 1.

   2. (2)  It is an alkali.

   3. (3)  It contains mobile ions.

• 1. (1) and (2) only

• 1. (1) and (3) only

• 1. (2) and (3) only

• 1. (1), (2) and (3)

2. Which of the following statements concerning different concentrated mineral acids are correct?

   1. (1)  Concentrated hydrochloric acid is corrosive.

   2. (2)  Concentrated nitric acid is usually stored in brown bottles.

   3. (3)  Concentrated sulphuric acid can be used as a dehydrating agent.

• 1. (1) and (2) only

• 1. (1) and (3) only

• 1. (2) and (3) only

• 1. (1), (2) and (3)

Solid X is soluble in water. When aqueous ammonia is added in an aqueous solution of X, a

white precipitate is formed. The precipitate dissolves upon addition of excess sodium

hydroxide solution. Which of the following compounds might X be?

• Zinc nitrate

• Barium sulphate

• Magnesium chloride

• Copper(II) carbonate

Which of the following substances can react with dilute sodium hydroxide solution?

(1)Zinc chloride solution

(2)Solid citric acid

(3)Ammonium sulphate

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)