HARD
9th CBSE
IMPORTANT
Earn 100

The formula of a compound of radium bromide is RaBr2. Identify the chemical formula of radium carbonate.

A: RaCl2B: RaCO3C: RaSO4

(Enter your correct answer as A, B or C)

66.67% studentsanswered this correctly

Important Questions on Atoms and Molecules

MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 9
The formula of a compound of radium bromide is RaBr2. 
Identify the formula of radium sulphate.

A: RaCl2B: RaCO3C: RaSO4

(Enter your correct answer as A, B or C)

MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 10
Two elements sometimes form more than one compounds.
MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 10
The smallest particle of a compound is element.
EASY
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 10
Mass of 6.022 atoms of an element is called atomic mass.
MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 10
One mole of every substance has same mass.
EASY
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 11
_____ is a pure substance which is made up of only one kind of atoms.
EASY
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 11
The atomicity of ozone is _____. (one / two / three / four)
EASY
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 11
1 mole of oxygen atoms = _____ × 1023 oxygen atoms. (3.011, 6.022, 7.09)