Question

The substance which is solid at room temperature forms ionic compound and with hydrogen forming a hydride the aqueous solution of which is acidic may be

Answer 1

Answer:

HI - hydrogen Iodide

Explanation:

Non-metal hydrides are acidic (you think why), and by acidic i mean something which is reasonably acidic such as "hydrohalide's aqueous solution" but not H2O(also a non-metal hydride). In fact only Iodine is solid among halogens at room temperature. (In fact it is the most acidic hydride)