Question

Miss Anita performed an activity during her period in class VII, she took a test tube and pour a transparent liquid in it, She exhaled air through straw in the test tube. All the students were surprised to see white colour appeared in the test tube. According to you, which liquid she had poured in the test tube

Answer 1

Answer:

I think she had poured salt water or water or iodine

Answer 2

Miss Anita performed an activity during her period in class VII, she took a test tube and pour a transparent liquid in it, She exhaled air through straw in the test tube. All the students were surprised to see white colour appeared in the test tube. According to you, which liquid she had poured in the test tube.

a) Fresh Water b) Salty Water c) Lime Water d)Hard Water

c) Lime Water.

Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white. Carbon dioxide reacts with limewater (a solution of calcium hydroxide, Ca(OH) 2), to form a white precipitate (appears milky) of calcium carbonate, CaCO 3. Adding more carbon dioxide results in the precipitate dissolving to form a colourless solution of calcium hydrogencarbonate.