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
61. The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is
- chain isomerism
- functional group isomerism
- positional isomerism
- metamerism
62. The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?
- 1/6
- 1/3
- 1/8
- 1/4
63. The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
- 4
- 5
- 2
- zero
64. The National Chemical Laboratory is situated in
- New Delhi
- Bangalore
- Pune
- Patna
65. Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be
- 2 : 16 : 2
- 2 : 16 : 1
- 1 : 16 : 2
- 1 : 1 : 1
66. The mass number of an atom is equal to
- the number of protons
- the number of protons and electrons
- the number of nucleons
- the number of neutrons
69. The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
- liquation
- leaching
- levigation
- magnetic separation
70. The inert gases are ____ in water
- sparingly soluble
- insoluble
- soluble
- None of these