Chemistry Questions and Answers
General Knowledge Chemistry Questions with Answers cover chemical reactions, elements, and compounds. These are important in SSC, RRB, and B.Ed exams to develop basic scientific understanding
Chemistry
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71 questions
41. The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?
- 3 billion years
- 100 years
- 0.01 minute
- 13 days
42. The gas used for artificial ripening of green fruit is
- ethylene
- ethane
- carbon dioxide
- acetylene
44. The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is
- cineole
- engenol
- geraniol
- limonene
45. The molecule which has the highest percentage of ionic character among the following is A.
- HI
- HF
- HCI
- HBr
46. The high reactivity of fluorine is due to
- its high electro negativity
- small size of fluorine atom
- availability of d-orbitals
- strong F - F bond
47. The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is
- 5x/36
- 5x
- 7.2 x
- x/6
49. The main chemical constituent of clay is
- silicon oxide
- aluminium borosilicate
- zeolites
- aluminium silicate
50. The mineral containing both magnesium and calcium is
- magnesite
- calcite
- carnallite
- dolomite