Question

In each of the following questions, two statements are given: statement -1 and statement -2. Examine the statements carefully and answer the questions according to the instructions given below:

Statement 1: Phosphorus reacts with $\text{conc}.HN{O}_3$ to form orthophosphoric acid.

Statement 2: $H_{3}P{O}_4$ is a tribasic acid and has three replaceable $H^{+}$ ions.

• A. Statement -1 is true, statement -2 is true; statement -2 is the correct explanation for statement -1.
• B. Statement -1 is true, statement -2 is true; statement -2 is not the correct explanation for statement -1.
• C. Statement -1 is true, statement -2 is false.
• D. Statement -1 is False, Statement -2 is true.

Answer 1

The correct option is B Statement -1 is true, statement -2 is true; statement -2 is not the correct explanation for statement -1.

$S_1:\underset{Phosphorus}{P_4}+20HN{O}_3\to 20N{O}_2+\underset{orthophosphoricacid}{4H_{3}P{O}_4}+4H_{2}O$

$S_2:$

Statement 1 is true.
Statement 2 is true
But statement 2 is not the correct explanation for statement 1.