General
✓✗Smallest particle of an element which can exist freely in nature is
- Neutron
- Electron
- Atom
- Molecule
General
✓✗How many moles of oxygen atoms are present in 
?
?- 2 moles
- 3 moles
- 1.5 moles
- Cannot be predicted from the formula
General
✓✗Dalton’s symbol ‘
’ represents
’ represents- Silver
- Carbon
- Gold
- Platinum
General
✓✗Which one of the following will have maximum number of molecules?
4 g of methane or 4 g of oxygen gas or 4 g of water.
4 g of methane or 4 g of oxygen gas or 4 g of water.
- Water
- Methane
- Oxygen
- All have equal
General
✓✗‘
’ represents
’ represents- 2 atoms of chlorine
- 2 molecules of chlorine
- 1 molecules of chlorine
- None of these
General
✓✗An anion has
- No charge
- Positive charge
- Negative charge
- Partial charge
General
✓✗An anion is formed by
- Gaining electron(s)
- Losing electron(s)
- Sharing electron(s)
- Losing protons
General
✓✗Dalton’s symbol ‘
’ represents
’ represents- Silver
- Sulphur
- Sodium
- None of these
General
✓✗How many molecules are present in a drop of water weighing 0.5 gms?
-
molecules
-
molecules
-
molecules
-
molecules
General
✓✗If 50 gms of calcium carbonate is decomposed completely then 28 gms of calcium oxide and 22 grams of carbon dioxide are obtained. Which law of chemical combination is illustrated by this statement?
- Law of constant proportion
- Law of conservation of mass
- Law of multiple proportions
- All of these