Question

When steam reacts with a metal like iron at a high temperature it gives A and B. The same metal when reacted with an acid forms A and C. Which of the following is/are not true about the properties of A.

• A. It is soluble in water due to its polar structure.
• B. It can be liquified under high temperature and low pressure
• C. It reacts with carbon to form methane
• D. It is used in Haber's process for the manufacture of ammonia

Answer 1

Answer: (A), (B)

The correct options are
A It is soluble in water due to its polar structure.
B It can be liquified under high temperature and low pressure

$3Fe+4H_{2}O\rightleftharpoons \underset{B}{F{e}_3{O}_4}+\underset{A}{4H_2\uparrow }$
$Fe+2HCl\to \underset{C}{FeC{l}_2}+\underset{A}{H_2\uparrow }$
A is dihydrogen. It is insoluble in water because of its non-polar structure. It can be liquified at low temperature and high pressure.
$H_2+C\stackrel{1420K}{\to }C{H}_4$
Haber's process,
$N_2+3H_2\leftrightharpoons N{H}_3$
At 673K, 200atm, iron as a catalyst and molybdenum as a promoter.