Question

1. Give one test each to distinguish between the following
pairs of chemicals :
(i) Zinc nitrate solution and calcium nitrate solution.
(ii) Sodium nitrate solution and sodium chloride
solution.
(iii) Iron (III) chloride solution and copper chloride
solution.​

Answer 1

Answer:

• (1) Zinc nitrate and calcium nitrate solution can be distinguished by reaction with ammonium hydroxide. Zinc forms a white gelatinous ppt. whereas there is no precipitation of calcium hydroxide even with excess of ammonium hydroxide.

• (2) NaCl and NaNO3 solution can be distinguished simply by the addition of AgNO3 solution into NaCl solution and NaNO3 solution. NaCl gives white ppt of AgCl where as NaNO3 will not.

• (3). A condition of too little iron in the body.Iron deficiency is a common cause of too few healthy red blood cells in the body (anaemia). In a pregnant woman, iron deficiency puts the baby at risk ofdevelopmental delays.

• (4). Copper Chloride is a brownish-yellow powder. It is used in petroleum, textiles, metallurgy, photography, agricultural products, and as a feed additive and wood preservative. It is also used in light sensitive paper manufacturing, pigments for glass and ceramics, and Acrylonitrile manufacturing.

Explanation:

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