4. Tick () the correct option.
It is a simplest or basic form of a pure substance.
O b. Symbol
C. Valency
d. None of these
2. This is the symbol used to represent magnesium element.
b. Pb
c. Mg
d. Mu
3. What is the Latin name of element lead?
b. Aurum
C. Argentum
d. Plumbum
4. Which of the following is the molecular formula for hydrogen peroxide?
a. HO
c. H₂O₂
d. HO
5. What is the combining capacity of an element called?
b. Valency
C. Radical
d. None of these o
6. What is an element having valency 3 called?
O b. Monovalent
C. Trivalent
d. Pentavalent
7. An atom or a group of atoms carrying some charge are called
O b. valency
C. reaction
d. none of these
8. What is the new substance formed during a chemical reaction called?
b. lon
C. Reactant
d. Product
a Symbol
a. Divalent
a radical
a. Radical
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Valency
C. Radical
d. None of these o
6. What is an element having valency 3 called?
O b. Monovalent
C. Trivalent
d. Pentavalent
7. An atom or a group of atoms carrying some charge are called
O b. valency
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