Question

X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ___________.
(b) If X is a non-metal, then the litmus will turn _________.
(c) If X is a reactive metal, then _________ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non-metal, it will form _________ oxide, which will form _________ solution with water.
(e) If X is a non-metal, it will not conduct electricity unless it is carbon in the form of _________.

Answer 1

(a) If X is a metal, then the litmus will turn blue.
(b) If X is a non-metal, then the litmus will turn red.
(c) If X is a reactive metal, then hydrogen will be evolved when X reacts with dilute sulphuric acid.
(d) If X is a non-metal, it will form an acidic oxide, which will form an acidic solution with water.
(e) If X is a non-metal, it will not conduct electricity unless it is a carbon in the form of graphite.