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CBSE->Std 9 Questions

Total Questions 1962
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'?
Do the elections conducted in India are truly democratic? reasons
what do you mean by demodulation?
What are some examples of thallophyta, bryophyta, pteridpphyta, gymnosperms and angiosperms ?
What is actually mean by mole concept
Which element is mostly found in earth crust?
according to Archimedes, when an object is fully or partially immersed in a fluid then the object feels a buoyant force ....but in case of air , which is a fluid do not posses any buoyant force why?
explain the gujjar bakarwal's stay during the village ?
what is the traditional activities of gujjar bakarwals
what is a valency ?
what is molar mass ?
is the use of minerals is more in this generation on the olden days or not?
find the value of k, if x-3 is a factor of x - 4x + k
WHICH IS THE LATEST CYCLONE APPROACHED INDIAN COAST
Why does rain fall backward while the vehicle is travelling and straight while stopped ?
How was humans formed ?
Who named the planet Earth and why ?
Give an example of an object whose potential energy and kinetic energy are same.