Practice MCQ Questions and answers on Chemistry-GK

Carbon dioxide is present under pressure in soft drinks.

If we burn graphite, no residue will be left.

Lead pencils contain graphite (a form of carbon), not lead. In fact, contrary to what many people believe, lead pencils never were made with lead. The ancient Romans used a writing device called a stylus.

Highest percentage of carbon is found in anthracite.

The main source of carbon monoxide is transportation.

Carbon monoxide intoxication can be caused by single or repetitively generated high short-term peaks, and carbon monoxide poisoning is the leading cause of death from poisoning (accidental and intentional).

Water-gas A mixture of carbon monoxide (CO) and hydrogen (H2) produced by passing steam over red-hot coke using the endothermic reaction.

Exhaust fumes of motor cars, gases produced from coal fire in a closed room and coal gas, all contain carbon monoxide, which is the cause of their poisonous nature. When carbon monoxide is inhaled, it prevents the oxygen from combining with hemoglobin and instead combines itself with hemoglobin to form carboxyhaemoglobin, which is stable compound. This causes oxygen starvation in the body tissues and eventually causes death by suffocation.

There are many pure forms of carbon in earth, but Diamond is the purest form of carbon. Other pure forms are graphite, fullerene and charcoal. Gold is not a form of carbon.

There are many pure forms of carbon in earth, but Diamond is the purest form of carbon. Other pure forms are graphite, fullerene and charcoal.