Question

Rohit added some sodium hydroxide to a test tube containing dilute hydrochloric acid.Which of the following observations are correct?
A. The temperature of the test tube increases
B. A salt is formed
C. The temperature of the test tube decreases
D. Water is formed

Answer 1

Explanation:

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Answer 2

Of the following observations A. The temperature of the test tube increases B. A salt is formed and D. Water is formed are correct.

• The reaction between sodium hydroxide and dilute hydrochloric acid is exothermic as this reaction is accompanied by the evolution of heat. Hence, the temperature of the test tube will increase. So, option A is correct.
• HCl is an acid, while sodium hydroxide is basic. A neutralisation reaction occurs when an acid reacts with a base, resulting in the formation of water and salt as the end product. Hence, both options B and D are correct.