What would you observe in each of the following cases? 1. Ammonium hy

1.	What would you observe in each of the following cases? 1. Ammonium hydroxide is first added in a small quantity and then in excess to a solution of copper sulphate. 2. Sugar crystals are added to a hard glass test tube containing concentrated sulphuric acid. 3. Copper is heated with concentrated nitric acid in a hard glass test tube. 4. Water is added to the product formed, when aluminium is burnt in a jar of nitrogen gas. 5. When carbon monoxide is passed over heated copper oxide.
Answer» 1. In small quantity — a bluish white ppt is obtained. In excess — deep (inky) blue solution is obtained. 2. Turns to black mass called sugar charcoal. 3. A reddish brown acidic gas called nitrogen dioxide is obtained. 4. Pungent smelling basic gas called ammonia is evolved. 5. Reddish metal copper is obtained.

What would you observe in each of the following cases? 1. Ammonium hydroxide is first added in a small quantity and then in excess to a solution of copper sulphate. 2. Sugar crystals are added to a hard glass test tube containing concentrated sulphuric acid. 3. Copper is heated with concentrated nitric acid in a hard glass test tube. 4. Water is added to the product formed, when aluminium is burnt in a jar of nitrogen gas. 5. When carbon monoxide is passed over heated copper oxide.

Answer»

1. In small quantity — a bluish white ppt is obtained. In excess — deep (inky) blue solution is obtained.

2. Turns to black mass called sugar charcoal.

3. A reddish brown acidic gas called nitrogen dioxide is obtained.

4. Pungent smelling basic gas called ammonia is evolved.

5. Reddish metal copper is obtained.