Maharashtra Board Class 8 Chemical Change and Chemical Bond MCQ
Elevate your Class 8 Chemistry understanding with Maharashtra Board’s Class 8 Chemical Change and Chemical Bond MCQs.
Which of the following represents a chemical change?
a. Melting of ice
b. Boiling of water
c. Ripening of mango
d. Darkening of a cut potato
Answer: c. Ripening of mango
What is the product formed when baking soda is added to lemon juice?
a. Oxygen
b. Carbon dioxide
c. Water
d. Hydrogen
Answer: b. Carbon dioxide
What is the chemical equation for the combustion of carbon in the presence of oxygen?
a. C + O2 → CO
b. CO2 + H2O → C + O2
c. C + O2 → CO2
d. H2O + CO2 → C
Answer: c. C + O2 → CO2
In the chemical equation for cleaning Shahabad tile with hydrochloric acid, what is the product that gets washed away with water?
a. Calcium carbonate
b. Calcium chloride
c. Carbon dioxide
d. Water
Answer: b. Calcium chloride
What type of bond is formed in the compound sodium chloride (NaCl)?
a. Covalent bond
b. Metallic bond
c. Ionic bond
d. Hydrogen bond
Answer: c. Ionic bond
What is the charge on a sodium ion (Na+)?
a. +1
b. -1
c. 0
d. +2
Answer: a. +1
How many electrons are shared in one covalent bond?
a. 1
b. 2
c. 3
d. 4
Answer: b. 2
Which compound is formed by the combination of calcium chloride and sodium carbonate?
a. Calcium carbonate + Sodium chloride
b. Sodium carbonate + Calcium chloride
c. Calcium chloride + Sodium carbonate
d. Sodium chloride + Calcium carbonate
Answer: d. Sodium chloride + Calcium carbonate
What is the valency of oxygen in the H2O molecule?
a. 1
b. 2
c. 3
d. 4
Answer: b. 2
In the formation of the HCl molecule from H and Cl atoms, how many covalent bonds are present?
a. 1
b. 2
c. 3
d. 4
Answer: a. 1
What is the product formed when washing soda is added to hard water to soften it?
a. Sodium chloride
b. Sodium carbonate
c. Calcium carbonate
d. Sodium sulfate
Answer: c. Calcium carbonate
Which chemical bond involves the sharing of electrons between atoms?
a. Ionic bond
b. Covalent bond
c. Metallic bond
d. Hydrogen bond
Answer: b. Covalent bond
What is the charge on a chloride ion (Cl-)?
a. +1
b. -1
c. 0
d. +2
Answer: b. -1
In the formation of the H2 molecule, how many electrons are shared between the two hydrogen atoms?
a. 1
b. 2
c. 3
d. 4
Answer: b. 2
