Choose the correct alternative from the following : - Assertion (A) : Graphite is slippery and used as a lubricant. Reason (R): Graphite has free electrons.
Choose the correct alternative from the following : - Assertion (A) : Pressure cookers are fitted with ebonite handles. Reason (R) : Ebonite is strong.
Choose the correct alternative from the following : - Assertion (A) : Most of the ancient civilisations grew near the rivers. Reason (R) : The main occupation of man was agriculture.
Choose the correct alternative from the following : - Assertion (A) : Carbohydrates provide energy to the body. Reason (R) : Obesity is caused by excessive intake of carbohydrates.
Choose the correct alternative from the following : - Assertion (A) : Earthworms are not good for agriculture. Reason (R) : Earthworms break down the soil into fine particles and make it soft.