MEDIUM
9th CBSE
IMPORTANT
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What do you understand by Gram Molar Volume?
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Important Questions on Atoms and Molecules
EASY
9th CBSE
IMPORTANT
What is Avogadro's number?
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9th CBSE
IMPORTANT
What do you understand by polyatomic cation?
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9th CBSE
IMPORTANT
How do you define mole in terms of mass?
HARD
9th CBSE
IMPORTANT
Which of the following has maximum number of atoms?
HARD
9th CBSE
IMPORTANT
Which of the following would weigh the highest?
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9th CBSE
IMPORTANT
A change in the physical state can be brought about
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9th CBSE
IMPORTANT
Calculate the number of moles of magnesium present in a magnesium ribbon weighing . The molar atomic mass of magnesium is (raise to the power - )
MEDIUM
9th CBSE
IMPORTANT
How do you define the valency of an element in a molecular compound?
(i) It's combining capacity and is equal to the number of hydrogen atoms.
(ii) Number of chlorine atoms.
(iii) Ratio of molar should be equal.
(iv) Double the number of oxygen atoms with which one atom of the element combines.
