When dilute hydro-chloric acid is added to granulated zinc placed in a test tube, the observation made is
(1) the surface of the metal turns shining
(2) the reaction mixture turns milky
(3) odour of chlorine is observed
(4) a colourless and odorless gas evolves with bubbles

Q. When dilute sulphuric acid is added to granulated zinc placed in a test-tube, the observation made is :
(1) the surface of the metal turns shiny
(2) the reaction mixture turns milky
(3) odour of sulphur dioxide is observed
(4) a colourless and odourless gas evolves with bubbles

Q. When dilute hydrochloric acid is added to granulated zinc placed in a test tube, the observation made is:

Q. A student added dilute HCl to a test tube containing zinc granules. Which of the following observations are correct?
I. Zinc surface became dull and black.
II. A gas was evolved which burnt with a pop sound.
III. The solution remained colourless.

Q.

When a student added Zinc granules to dilute $HCl$, a colourless and odourless gas was evolved, which was tested with a burning match stick, it was observed that:

Q. Acetic acid is heated with $N{a}_{2}C{O}_3$ in a test tube. A colourless and odourless gas (X) is evolved. The gas turns lime water milky. Identify X.