Last updated on February 6th, 2024 at 12:52 pm
CG Board Class 8 Carbon
Chhattisgarh Board Class 8 Science Chapter 6 Solution Textbook question and answers as well as extra question and answers from the chapter
Choose the correct answer :-
1. Graphite is not used :-
(a) As lubricant (b) In electrodes
(c) In pencil lead (d) In cutting instrument.
2. Carbon dioxide converts blue litmus into red, thus it is an :-
(a) Acidic oxide (b) Alkaline/basic oxide
(c) neutral oxide (d) none of these.
3. Carbon allotrope with 60 atom is :-
(a) Fullerene (b) Graphite
(c) Diamond (d) Charcoal
4. Dry ice is :-
(a) Solid CO2 (b) liquid CO2
(c) Gaseous CO2 (d) Solid CO
5. The hardest substance in nature is :-
(a) Graphite (b) Stone
(c) Diamond (d) Charcoal
6. Which zone of the flame has the highest temperature?
(a) Inner dark zone (b) Shining and bright middle zone
(c) Light blue zone (d) Unlighted zone
7. Allotropy is a characteristic of : –
(a) Element (b) Compound
(c) Mixture (d) All of the above
Fill in the blanks :-
1. Combination of __________ produces flame.
2. Because of its softness ________ is used in pencil lead.
3. _________ is the hardest allotropic form of carbon.
4. Carbon dioxide is a ______ , _______ gas.
Combination of fuel and oxygen produces flame.
Because of its softness graphite is used in pencil lead.
Diamond is the hardest allotropic form of carbon.
Carbon dioxide is a colorless, odorless gas.
