Question

Activity 2.3
CAUTION: This activity needs the teacher's assistance.
Set the apparatus as shown in Fig. 2.1.
Take about 5 mL of dilute sulphuric acid in a test tube and add a
few pieces of zinc granules to it.
What do you observe on the surface of zinc granules?
Pass the gas being evolved through the soap solution
Why are bubbles formed in the soap solution?
Take a burning candle near a gas filled bubble.
What do you observe?
Repeat this Activity with some more acids like HCI. HNO, and
СН, СООН.
Are the observations in all the cases the same or different?
Delivery tube
Stand
Burning of hydr​

Answer 1

As you add a metal to acid it releases a salt of the metal and hydrogen gas.

METAL + ACID ⇒ METAL SALT + HYDROGEN GAS

for ex : Na + HCl  ⇒ NaCl + H₂