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
Chemical Reaction
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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.
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