Chemistry Questions and Answers for Competitive Exam
Chemistry GK Questions
Q.22 The major constituent of air is
(A) nitrogen
(B) carbon dioxide
(C) oxygen
(D) hydrogen
Ans . A
Q.23 The main chemical constituent of clay is
(A) silicon oxide
(B) aluminium borosilicate
(C) zeolites
(D) aluminium silicate
Ans . D
Q.24 The mineral containing both magnesium and calcium is
(A) magnesite
(B) calcite
(C) carnallite
(D) dolomite
Ans . D
Q.25 The method that cannot be used for removing the permanent hardness of water is
(A) adding sodium carbonate
(B) distillation
(C) adding caustic soda
(D) boiling
Ans . D
Q.26 The following are the half-lives of four active isotopes. Which one of the following is the most dangerous to handle?
(A) 3 billion years
(B) 100 years
(C) 0.01 minute
(D) 13 days
Ans . C
Q.27 The gas used for artificial ripening of green fruit is
(A) ethylene
(B) ethane
(C) carbon dioxide
(D) acetylene
Ans . A
Q.28 Zone refining is used for the purification of
(A) Au
(B) Ge
(C) Ag
(D) Cu
Ans . B
If you have any problem or doubt regarding Chemistry Questions and Answers for Competitive Exams, you can ask me in the comment section. To more practice for General Science Questions, Visit the next page.
Showing page 4 of 6
enhttps://www.hindi.examsbook.com/chemistry-questions-and-answers-for-competitive-exam/464chemistry-questions-and-answers-for-competitive-examAbout author
Rajesh Bhatia
A Writer, Teacher and GK Expert. I am an M.A. & M.Ed. in English Literature and Political Science. I am highly keen and passionate about reading Indian History. Also, I like to mentor students about how to prepare for a competitive examination. Share your concerns with me by comment box. Also, you can ask anything at linkedin.com/in/rajesh-bhatia-7395a015b/.
Read more articles