Mixture of concentrated HNO_3 and concentrated HCl makes a powerful solution in which precious metal gold is dissolved. Name the solution which is formed?

Which mixture is used to dissolve precious metal gold?

The solution salt in water in which no more salt can be dissolved is called-

Three metals- copper, zinc and nickle are used to make an alloy which is used in making utensils and idols. Name that alloy?

Which one of the following four metals would be displaced from the solution of its salt by other three metals?

Name the source from which litmus solution is obtained. What is the use of this solution?

A sample of 1.0g of solid Fe_(2)O_(3) of 80% purity is dissolved in a moderately concentrated HCl solution which is reduced by zinc dust. The resulting solution required 16.7mL of a 0.1M solution of the oxidant. Calculate the number of electrons taken up by the oxidant.

Which one of the following transition metal ions is colourless in aqueous solution ?

Which gas is produced when Al metals reacts wth NaOH solution?