Sulphur pieces do not react with cold concentrated nitric acid . But sulphur powder reacts.
Explain the reason why the rate of chemical reaction is increased here ?

Sulphur pieces do not react with cold concentrated nitric acid . But sulphur powder reacts. Suppose you want to incease the rate of reaction again. Which way you would choose ? Give reason.

What are the products obtained when copper reacts with concentrated nitric acid?

Why rate of reaction increases when concentration increases ?

Write down the chemical reaction between concentrated nitric acid and aluminium.

Why is concentrated sulphuric acid not used as a drying agent in the preparation of ammonia?

Hot concentrated sulphuric acid is a strong oxidising agent. Why?

The temperature dependence of the rate of a chemical reaction can be explained by Arrhenius equation.The rate of a chemical reaction doubles for an increase of 10 K in absolute temperature from 300 K. Calculate the activation energy(Ea)? [ R=8.314 JK^(-1)mol^(-1),log 2 = 0.3010 ].

Take 5mL water in a test tube and slowly add concentrated sulphuric acid to it. Touch the bottom of the test tube. What do you feel? Is the reaction exothermic or endothermic?

The wooden cupboards in which concentrated sulphuric acid is often seen charred. Why?