Tuesday, 5 November 2019
Monday, 4 November 2019
Chemistry For Class IX - Chapter No.1 - MCQs And Fill In The Blanks
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Chapter No.1: Introduction To Chemistry
Multiple Choice Questions/
Fill In The Blanks
Fill in the blanks:
i) The early Greeks believed that everything in the universe was made up of four elements Earth, Air, Fire and Water.ii) Al-Razi divided chemical substances on the basis of their origin as living and non-living.
iii) Organic chemistry is the branch of chemistry which deals with the carbon compounds.
iv) Bio chemistry is the backbone of Medical science.
v) PVC which is a plastic is the short name of Poly Vinyl Chloride.
vi) Oxygen was discovered by J. priestly.
vii) The best disinfectant is Chlorine.
viii) The periodic arrangement was the result of Mendeleev’s work.
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