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CBSE / Chemistry Questions

Total Questions 1082
what is the structure of 2-Bromo-4-hydroxybenzonitrile?
what is the difference between aliphatic and aromatic hydrocarbons?
what is soil?
what is the difference between aliphatic and aromatic hydrocarbons?
1) what is the difference between (delta)rH and (delta)rH-? 2)N2 + 3H2 <----> 2NH3. What are the conditions for maximum yield of NH3?
What is Alpha,Beta & Gama Radiations.
why fire extinguisher is very good than water
instrument used to purify milk
what is the full form of pcra?
How will you convert a saturated compound to an unsaturated compound?
Differences between an ionic compound and a covalent compound.
how do explosions make sound
Who invented Canal rays?
Both valencies and ion charges are of same value?
What is acids
what is mole? what is the relation of mole and molar mass? how is avagardo number related to mole ?(if the number of particles in one mole of a substance is equal to avagardo number should we have to multiply the to avagardo number?)
Is there any substance which is smaller than a atom ?
An oxide of nitrogen is found to contain nitrogen and oxygen combined together in the ratio of 7:16 by mass. Derive the formula of the oxide and name it?
What is the chemical formula of 'lime'?
What is the chemical formula of 'chalk'?