Answer the question given below:
Collect all the metal samples except sodium and potassium. If the samples are tarnished, rub them clean with sand paper.
CAUTION: Do not take sodium and potassium as they react vigorously even with cold water.
Put the samples separately in test tubes containing dilute hydrochloric acid. Suspend thermometers in the test tubes, so that their bulbs are dipped in the acid.
Observe the rate of formation of bubbles carefully.
CAUTION: Do not take sodium and potassium as they react vigorously even with cold water.
Put the samples separately in test tubes containing dilute hydrochloric acid. Suspend thermometers in the test tubes, so that their bulbs are dipped in the acid.
Observe the rate of formation of bubbles carefully.
a. What happens when a metal reacts with nitric acid?
b. What is aqua regia?
c. What happens when aluminium react with dil. HCl?
d. When a metal reacts with water, hydrogen gas is liberated. Which observation confirms that the gas evolved is hydrogen?