Chemistry, asked by aslamm1, 4 days ago

Give reasons and the activity
Select the incorrect observations from the statements given:

I. The amount of Carbon dioxide in atmospheric air and exhaled air are equal.

II. Exhaled air contains more Carbon dioxide as compared to atmospheric air.

III. Atmospheric air contains more carbon dioxide as compared to exhaled air.

IV. Lime water immediately turns milky in both the test tubes.

(a)I and IV

(b)II and IV

(c)I, II and III

(d)I, III and IV

54. In 2nd activity Riya observed that:

(a)Lime water turns milky in test tube after some time.

(b)Lime water turns milky in test tube immediately.

(c)No change in color is observed.

(d)Lime water in test tube turns blue black.

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Answers

Answered by selviyogi1579
1

Answer:

Option d. I, III and IV is the correct answer and Q.54 the answer is a).

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Answered by MaTaehyung
8

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a)I and IV is the correct answer.

que 54:-

Answer-

b)Lime water turns milky in test tube immediately.

explaination

When carbon dioxide is passed through lime water, it turns milky due to the formation of calcium carbonate.

Ca(OH)2(aq) + CO2(aq)→ CaCO3(s)↓ + H2O(l)

Calcium carbonate precipitates as a milky white precipitate. This is a qualitative test for the presence of hydroxide salts.

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