Sodium sulphate, Barium chloride, Magnesium sulphate, Bleaching powder. 2. Strontium – 89, Strontium – 90, Radium – 223, Iodine -123.

Question

Select the odd man out:

1. Sodium sulphate, Barium chloride, Magnesium sulphate, Bleaching powder.

2. Strontium – 89, Strontium – 90, Radium – 223, Iodine -123.

3. Soap, Toothpaste, Baking soda, Curd.

5. Boron-10, Iodine – 131, Cobalt – 60, Iodine – 123.

6. Na₂SO₄ , K₃PO₄ , MgBr₂ , HCl.

Answer 1

1. Bleaching powder, all others are crystalline salt with water of crystallization while bleaching powder is not.

2. Iodine -123, it is used to cure hyperthyroidism while others are used to cure bone cancer.

3. Curd, it is acidic in nature while others are basic in nature.

4. CaOCl₂ , it is amorphous in nature while rest are crystalline in nature.

5. Iodine -123, it is used in hyperthyroidism while rest are used in treatment of brain tumour.

6. HCl, rest all are salts but HCl is an acid.