Choose the correct alternative from the following : - Assertion (A) : Clothes are not washed properly in hard water. Reason (R) : Hard water contains many minerals.
Choose the correct alternative from the following : - Assertion (A) : Silver is not used to make electric wires. Reason (R) : Silver is a bad conductor.
Choose the correct alternative from the following : - Assertion (A) : DDT has nowadays lost its use as an insecticide. Reason (R) : DDT is harmful to man.
Choose the correct alternative from the following : - Assertion (A) : Leakages in household gas cylinders can be detected. Reason (R) : LPG has a strong smell.