Some metals like magnesium, ribbon, aluminium foil, copper, wire and c

1.	Some metals like magnesium, ribbon, aluminium foil, copper, wire and charcoal (powder) were taken in different test tubes labelled as P, Q, R and S. 5 mL of dilute hydrochloric acid was added to each test tubes. When a burning matchstick is brought near the mouth of each test tube, in which cases pop sound would be heard
Answer» Answer: p,Q,r Explanation: as metal react with acid to give salt and hydrogen gas and when a BURNING matchstick is BROUGHT NEAR to the hydrogen gas a POP up sound will be heard

Some metals like magnesium, ribbon, aluminium foil, copper, wire and charcoal (powder) were taken in different test tubes labelled as P, Q, R and S. 5 mL of dilute hydrochloric acid was added to each test tubes. When a burning matchstick is brought near the mouth of each test tube, in which cases pop sound would be heard

Answer»

Answer:

p,Q,r

Explanation:

as metal react with acid to give salt and hydrogen gas and when a BURNING matchstick is BROUGHT NEAR to the hydrogen gas a POP up sound will be heard