State the inference drawn from the following observations :
Salt S is prepared by reacting dilute sulphuric acid with copper oxide. Identify S.

State the inference drawn from the following observations: Salt S is prepared by reacting sulphuric acid with zinc oxide.

State the inference drawn from the following observations: pH of liquid R is 10. What kind of substance is R?

State the inference drawn from the following observations : pH of liquid R is 10. What kind of substance is R ?

State the inference drawn from the following observations : A gas Q turns moist lead acetate paper silvery black. Identify the gas Q.

State the inference drawn from the following observations: A gas Q turns moist lead acetate paper silvery black. Identify the gas Q.

State the inference drawn from the following observation: A gas Q turns moist lead acetate paper silvery black. Identify the gas Q.

State the inference drawn from the following observations: A salt 'Y' which reacts with BaCl_2 solution to give a white precipitate insoluble in dil: HCI. State the anion in 'Y'.

State the inference drawn from the following observations: A salt 'X' on heating with sodium hydroxide solution evolves a gas which turns methyl orange to yellow. State the cation in 'X'.

State the inference drawn from the following observations : On carrying out the flame test with a salt P, a brick red flame was obtained. What is the cation in P?

Give balanced equations for the following reactions : Copper[II] oxide and dilute sulphuric acid.