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CBSE / Chemistry Questions

Total Questions 1082
what is dynamit?
ATOMIC NUMBER OF CHOLORINE
State and verify the law of conservation of mass with the help of neat labeled diagram and also give the balanced equation.
Define acid,base,salt.
what is covalent bond
the equilibrium constant kc for the decomposition of 'pcl5'is 0.0625mol/L at 300c predict the value of kp?
what is a&b in vander waal's equation?
explain about carbon compounds
for the compound (PtCl4)- how is charge determined?
which is the main source from synthetic fibres are made
charcoal is burnt in air.The gas evolved is ....[x]...This gas is passed through a clear solution....[y]... A White precipitate....[z]is formed.If Z Identified as calciumcarbonate,identify X and write for two reactions.
WHAT ARE IONIC BONDS?
what is polar molecules and non polar molecules and momentary dipole?
What is galvanisation
What is sodium bicarbonate?
DEAR SIR , IWANT TO KNOW THAT IF SINGLE BONDS , DOUBLE BONDS , TRIPLE BONDS ARE COMING UNDER COVALENT BONDS
what is the difference between physical and chemical changes ?
ARRANGE THE FOLLOWING SUBSTANCES IN THE INCRASING ORDER OF FORCE OF ATTRACTION BETWEEN THIER PARTICLES ; OXYGEN ,SALT ,MILK
EXPLAIN THE FOLLOWING BRIEFLY 1.gases expert pressure pressure on the walls of the container 2.water is liquid at room temperature 3.evaporation causes cooling
There were a mixture of mustard oil and water . name the process that can be used to obtain mustard oil the mustard oil from the above mixture . draw a well labelled diagram of the prcess.