You are provided with a container made up of aluminium. You are also provided with solutions of dil HCl, dil `HNO_3`, `ZnCl_2` and `H_2O`. Out of these solutions which solution, can be kept in the aluminium container? Name the type of reactions takes place.

You are given three solutions A,B and C. the pH values of the solutions are 4.5, 7.0 and 10.0 respectively? Which of these has maximum concentration of H_3O^(+) ion.

What happens when an aqueous solution of sodium sulphate reacts with an aqueous solution of barium chloride? State the physical conditions of reactants in which the reaction between them will not take place. Write the balanced chemical equation for the reaction and name the type of reaction.

Which of the following gives iodoform on heating with a solution of I_2 containing Na_2CO_3 ?

You have been provided with three test tubes one of them contains distilled water and the other two contain an acidic solution and a basic soution respectively . If you are given only red litmus paper, how will you identify the contents of each test tube?

A container opened from the top and made up of a metal sheet, is in the form of a frustum of a cone of height 16 cm with radii of its lower and upper end as 8 cm and 20 cm, respectively. Find the cost of made which can completely fill the container, at the rate of Rs 20 per litre. Also find the cost of metal shape used to make the container, if it costs Rs 8 per 16cm^(2) . (Take pi=3.14 )

A container, opened from the top and made up of a metal sheet, is in the form of a frustum of a cone of height 16 cm with radii of its lower and upper ends as 8cm and 20 cm, respectively. Find the cost of the milk which can completely fill the container, at the rate of ₹ 20 per litre. Also find the cost of metal sheet used to make the container, if it costs ₹8 per 100 cm^2 ( Take pi = 3. 14 )

A container opened from the top is made up of a metal sheet is in the form of a frustum of a cone of height 16 cm with radii of its lower and upper ends as 8 cm and 20 cm, respectively. Find the cost of the milk which can completely fill the container, at the rate, of Rs 20 per litre. Also find the cost of metal sheet used to make the container, if it costs Rs 8 per 100 cm^2 . (Take pi = 3.14.)