Question

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4. A gas 'A' reacts with another gas 'B' in the presence of a
catalyst to give a colourless gas 'C'. The gas 'C' when
comes in contact with air produces a brown gas 'D'. The
solution of 'A' in water turns red litmus blue. Explain the
observations.
ommon refrigerent. How does it deplete​

Answer 1

As the 'A' turns red litmus blue it is a base. Now the gas 'A' combines with 'B' in presence of Catalyst to give colorless gas Nitrogen monoxide. It reacts with oxygen to give brown gas which is Nitrogen dioxide. NH3 in water forms NH4OH which turns red litmus blue.

${ \huge\rm \pink {(◍•ᴗ•◍)H}\rm \blue {A} \rm \purple {N}\ \rm \green{J} \rm\red {U}\ \rm \orange {H} \rm{U} \rm \gray{I(◍•ᴗ•◍)}}$