Question

Iodine reacts with conc.$HN{O_3}$ and gives:
1.Iodic acid
2.Hydrogen iodide
3.Nitrous oxide
4.Nitrogen dioxide

Answer 1

Iodine is non-metallic. We can see that it is purple-black solid which is present. It is known to be a lustrous element. Iodine is known to be the most electropositive halogen. It is also the least reactive of the halogens even if it can still form compounds. On heating it is able to sublime easily and thus give out a purple vapour

Complete step-by-step answer: Iodine is known to dissolve in some solvents, which can be carbon tetrachloride and it is only slightly soluble in water. It is used in many medical treatments as tincture and iodoform. It is also used in certain drugs preparation. There is a use of it in some printing inks and dyes.
There is a use of silver iodine in photography and is an ingredient of water purification tablets which are used for drinking water preparation.
When we talk about nitric acid, we know that nitric acid is a strong acid. It is often called as the spirit of nitre. It is colourless in its pure form but when it gets older it turns into a yellow cast. It has a property to be corrosive and toxic.
As we know that nitric acid is used as a strong oxidizing agent, it reacts with iodine and form nitrogen dioxide.
According to the following equation:
$10HN{O_3} + {I_2} \to 2HI{O_3} + 10N{O_2} + 4{H_2}O$

Hence the correct option is 1.

Note: Nitric acid is manufactured by catalytic oxidation of ammonia. It is also a common reagent which can be used in laboratories and is an important chemical used in industries to produce fertilizers. When we talk about the $pH$of nitric acid, it is known to be $3.01$. There is a formation of nitrate salts when it reacts with hydroxides, metals and oxides.