Why is it necessary to add `H_2SO_4` while preparing the solution of `CuSO_4`?

H_2SO_4 is

What is oxidation state of S in H_2SO_4

What is action of dilute H_2SO_4 under pressure on ethoxy ethane?

Add potassium chromate (K_2CrO_4) solution into the solution of barium sulphate (BaSO_4) . Write down the balanced equation for this reaction.

What is the action of concentrated H_2SO_4 on HBr and HI

What is the action of 40% H_2SO_4 reagents on acetylene?

Add potassium chromate (K_2CrO_4) solution into the solution of barium sulphate (BaSO_4) . Will · you call this reaction a displacement reaction or a double displacement reaction?

4.9 g of H_2SO_4 is present in 500 cm^3 of the solution has molarity.

Add potassium chromate (K_2CrO_4) solution into the solution of barium sulphate (BaSO_4) . Write the name of the precipitate.

Add potassium chromate (K_2CrO_4) solution into the solution of barium sulphate (BaSO_4) . What was the colour of the precipitate formed?