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CBSE / Chemistry Questions

Total Questions 1082
Explain MENDELEEV'S PERIODIC TABLE ANDITS DRAWBACKS,LIMITATIONS AND ACHEIVEMENTS .
How can you prove that water contains dissolved oxygen ?
i learned in school that diamond is the hardest element and no other element can cut diamond.My question is that can a diamond cut another diamond?
WHO IS THE FATHER OF CHEMISTRY ?
What are hydrocarbons ? Distinguish alkanes from alkenes and each of them from alkynes, giving one example of each. Draw the structure of each compound cited as example to justify your answer.
Give an example of reaction catalysed by an enzyme.
Mind map on periodic table?
consequences of drought
why do cut slices of apple & potato become brown?
who is known as the father of modern chemistry
what is renewable and non -renewable resource
who is the father of chemistry
who discovered oxygen?
How did water formed?
WHO DISCOVERED CANAL RAYS?
what is the difference between bitumen and coal tar?
How did water formed?
If natural items like plants, living things, etc mix with soil, why could not plastic, steel, etc mix with soil?
is ripening of a fruit is a physical or chemical change?
what are organo-metallic compounds?