Question

From the list given below, select the word(s) required to correctly complete blanks (i) to (v) in the following passage. The words from the list are to be used only once. Write the answers as (a) (i), (ii) (iii) and so on. Do not copy the passage.

A solution M turns blue litmus red, so it must contain  _______ ions; another, solution O turns red litmus blue and hence, must contain ______ ions.

Select the word/s given which are required to correctly complete the blanks.

विकल्प

• ammonia

• ammonium carbonate

• carbon dioxide

• hydrogen

• hydronium

• hydroxide

• precipitate

• salt

• water

Answer 1

A solution M turns blue litmus red, so it must contain hydronium ions; another, solution O turns red litmus blue and hence, must contain hydroxide ions.