Choose the correct alternative from the following : - Assertion (A): Carbon monoxide when inhaled causes death. Reason (R) : Carbon monoxide combines with haemoglobin.
Choose the correct alternative from the following : - Assertion (A) : When common salt is kept open, it absorbs moisture from the air. Reason (R) : Common salt contains magnesium chloride.
Choose the correct alternative from the following : - Assertion (A) : The use of chlorofluoro carbons is banned throughout the world nowadays. Reason (R) : These chemicals cause skin cancer.
Choose the correct alternative from the following : - Assertion (A) : The freezing of sea water during winter does not kill the fishes. Reason (R) : Only surface water is frozen.