In the lab students were asked to carry out the reaction between phenol and cons. `HNO_3`. But one student,'A' carried out the reaction between phenol and dil. `HNO_3`. Do you think that the student 'A' got the same result as others. Substantiate with suitable explanations. [Also write the chemical equations wherever necessary].

Assertion : On the addition of conc. HNO_(3) to the aqueous solution of common salt, NaCl crystallises out Reason : After the reaction between conc. HNO_(3) and hydrated ions, the water molecules are removed and the ions are thus unsolvated. (I) Both assertion and reason are true and reason is the correct explanation of assertion (II) Both assertion and reason are true and reason is not the correct explanation of assertion (III) Assertion is true and reason is false (IV) Assertion is true and reason is false

Potassium permanganate is a powerful oxidising agent in neutral, acidic and alkaline medium. In the lab, students were asked to convert an iodate. One of the students obtained I_2 instead of iodate:- What is the reaction carried out by the students who got iodate? Write the chemical equation.

Nitration of aniline is an electrophilic substitution reaction. A student proposes that aniline reacts with conc.HNO_3 to form m - nitro-aniline. Do you agree with the student ? Justify.

Pottassium permangante is a powerful oxdising agent in neutral, acidic and alkaline medium. In the lab, students were asked to convert an iodate. One of the students obtained I_2 instead of iodate:- What may be the reaction carried out by the student who obtained I_2 as one of the products?