Chemical Compounds and Reactions

Glucose is a covalent compound, hence it cannot give ions in solution and hence will be possessing the least precipitating power.

Green vitriol: FeSO₄.7H₂O Blue Vitriol: CuSO₄.5H₂O Thus, this option is correct.

Silver halides are light-sensitive compounds. When exposed to light, they undergo a chemical reduction process, which is the fundamental principle behind traditional film photography.

In a laboratory, sodium chloride is made by burning sodium in the atmosphere of chlorine, which is yellow in colour. The cause of yellow colour is the presence of electrons in the crystal lattice.

  Coloured glasses for goggles contain lanthanide oxide.

Correct option is (1). 

When KCl is heated with K₂Cr₂O₇ and concentrated H₂SO₄, chlorine gas liberates vigorously.

Correct option is (1). 

Correct option is (4). 

Add 5 ml of dil. HCl to salt and boil it. Add 1 ml of amyl alcohol ether and 1 ml of NH₄CNS solution. Shake well and the upper layer is coloured intense blue.

Correct option is (4). 

Correct option is (3). As₂S₃ dissolves in nitric acid to form H₃AsO₄, which gives a yellow crystalline ppt. with ammonium molybdate.

Correct option is (4). CuS is black. SnS and Bi₂S₃ are brown. Sb₂S₃ is orange yellow. 

Correct option is (1). The complex of Ni⁺² dimethyl glyoxime is red, that of Co⁺² is orange to light brown, that of Cr³⁺ is yellow and that of Zn²⁺ is white.

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