Basic quizzes

Q.1 The hardest form of carbon is
      A. coke
      B. graphite
      C. diamond

      D. charcoal

Answer: Option C

Q.2 The most important ore of aluminium is
       A. bauxite
       B. magnetite
       C. haematite
       D. monazite

Answer: Option A

Q.3 The hottest part of the gas flame is known as
       A. luminous zone
       B. dark zone
       C. blue zone
       D. non-luminous zone

Answer: Option D

Q.4 The human body is made up of several chemical elements; the element present in the highest              proportion (65%) in the body is
      A. carbon
      B. hydrogen
      C. oxygen
      D. nitrogen

Answer: Option C

Q.5 The gas used for artificial ripening of green fruit is
       A. ethylene
       B. ethane
       C. carbon dioxide
       D. acetylene

Answer: Option A