Chemistry General Knowledge Questions and Answers

Chemistry – General Knowledge Questions and Answers For Competitive Exams

Chemistry General Knowledge Questions and Answers

Q1. The fat of a common mussel-secretes a sticky glue that can be used to make heart implants.The unique chemical compound present in the glue is
Ans- Dihydroxy phenylalanine

Q2. When a metal is heated in a flame, the electrons absorb energy and jump to a higher energy state.On coming back to the lower energy state, they emit light, which we can observe in
Ans- Emission spectra

Q3. Exposure to mixtures of chemicals is greater than expected on the basis of the effects of exposure to each chemical individually.This is known as
Ans- Synergism

Q4. The effector response produced by two or more chemicals are less than the sum of the effects or response that the chemical would produce individually is known as
Ans- Antagonism

Q5. The open ‘Sigrees’ or coal stoves often require fanning to sustain burning because of
Ans- Tendency of carbon dioxide to form a layer along with dust smoke

Q6. Browning of paper in old books is caused by
Ans- oxidation of cellulose

Q7. The process of improving the quality of rubber by heating it with sulfur is called
Ans- Vulcanization

Q8. The gas that causes suffocation and death when coal or coke is burnt in a closed room is
Ans- Carbon monoxide

Q9. Atoms having the same number of protons but different number of neutrons are called
Ans- Isotopes

Q10. An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a
Ans- Battery