Chemistry
Which of the following reactions is a neutralization reaction ?
- When zinc reacts with dilute HCl
- Reaction between barium chloride solution and dilute H2SO4
- When carbon burns in air
- Sodium hydroxide reacts with dilute H2SO4
Answer
Sodium hydroxide reacts with dilute H2SO4
Reason — A neutralisation reaction occurs when an acid reacts with a base to form water and salt. In this case, sodium hydroxide (NaOH) is a base, and dilute sulphuric acid (H2SO4) is an acid. When they react, they form water (H2O) and sodium sulphate (Na2SO4), which is a salt.
2NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + 2H2O(l)
Zinc with dilute HCl is a displacement reaction. Barium chloride with dilute (H2SO4) is a double displacement reaction forming a precipitate. Carbon burning in air is a combination reaction.
Related Questions
State the conditions required for the following reactions to occur :
(a) Decomposition of water into hydrogen and oxygen.
(b) Formation of iron sulphide from iron and sulphur.
(c) Reaction between zinc and dilute hydrochloric acid to produce hydrogen gas.
(d) Decomposition of potassium chlorate into potassium chloride and oxygen.
Burning of a metal in air represents a :
- Combination reaction
- Displacement reaction
- Decomposition reaction
- Double displacement reaction
Which of the following oxides produces salt upon reacting with sodium hydroxide?
- Na₂O
- CaO
- NO
- ZnO
The acidic gas produced when lead nitrate is heated is :
- PbO
- NO₂
- MgO
- N₂O