Observe the given figures showing the mixing of chemicals in four different test tubes.

Which of the following statements is/are correct?
I. `H_2` gas is evolved in test tube (I).
II. Test tube (2) will burst as a large amount of heat is evolved.
III. No reaction takes place in test tube 3.
IV. In test tube 4, yellowish-green chlorine gas is evolved.

Options

A. II and IV only
B. I only
C. II and III only
D. I and IV only

Answer

B

Explanation

When in water, few drops of acid are added, it produces less heat. When calcium carbonate reacts with dil. HCI, carbon dioxide gas is produced. Copper does not react with dil. HCI as copper is less reactive than hydrogen.