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CBSE Questions

Total Questions 9982
what is a chert?
Which is the strongest metal of all metals ?
WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF MULTI-PURPOSE RIVER-VALLEY PROJECTS?
what is axis?
Amina thinks of a number and subtracts 5/2 from it. She multiplies the result by 8. The result now obtained is 3 times the same number she thought of. What is the number?
WHO INVENTED THE CLOCK
Verify Rolle’s theorem for f ( x) = 2 + ( x – 1)to the power of 2/3 in [ 0 , 2]
Liquids generally have lower density as compared to solids.But you must have observed that ice floats on water.Find out why.
WHY DOES CLOUDS HAVE DIFFERENT SHAPE
WHAT IS A CHERT
WHO DISCOVERD EARTH'S CORE
what is metals and non-metals?
FIRST POSTOFFICE IN INDIA
An object travels for 10 s with uniform acceleration along a straight line path . During this period if the velocity of the object is increased from 5 meter per second to 25 meter per second ,then find the distance traveled by the body ?
Complete the following (a) Zn + CuSO4 = (b) Fe2O3 + Al =
Balance the following equations (a) H2SO4+ NaOH = Na2SO4+H2O (b) Ba(OH)2+ HBr =BaBr2 + H2O (c) KCN + H2SO4 = K2SO4+HCN (d) Al + HCl = AlCl3 + H2O (e) CH4 + O2 = CO2 + H2O
Write balanced equation for the following reactions and identify the type of reaction (a) Zinc Carbonate gives Zinc Oxide plus Carbon dioxide (b) Magnesium plus Hydrochloric acid gives Magnesium Chloride plus Hydrogen (c) Potassium Bromide plus barium Iodide gives Potassium Iodide plus Barium Bromide (d) Hydrogen plus Chlorine gives Hydrogen Chloride
What is exothermic reaction and endothermic reaction? Give examples
What is a balanced chemical equation? Why should chemical equation be balanced?
What is the difference between displacement reaction and double displacement reaction? Write equation for these reactions