ICSE 8 Chemistry
Carbon and Its Compounds
Question 1:
The process by which decayed plants are slowly converted into coal is called
(a) fermentation
(c) carbonization
(d) petrification [Level: Easy]
Question 2:
An amorphous form of carbon is
(b) diamond
(c) graphite
(d) coke [Level: Easy]
Question 3:
In combined state carbon occurs as
(a) soot
(b) fullerene
(c) coke
(d) methane [Level: Easy]
Question 4:
How dry ice can be used as refrigerant? [Level: Difficult]
Question 5:
“When carbon dioxide is bubbled in limewater it turns milky and when bubbled in excess further milkiness disappears”. Give the balanced equations to support the statement. [Level: Difficult]
Question 6:
Why CO2 is not collected over water during laboratory preparation of CO2 using dil. HCl & CaCO3? [Level: Moderate]
Question 7:
Name the following:
(a) Superior type of coal
(b) Amorphous form of carbon formed from coal [Level: Easy]
Question 8:
Question 9:
Name the product formed when carbon monoxide burns with blue flame in the air. Give a balanced chemical equation to represent the above chemical change. [Level: Moderate]
Question 10:
In the extraction of pure metals from their corresponding ores, Carbon monoxide is used as
(a) Redox agent
(b) Oxidising agent
(d) Redox reagent [Level: Moderate]
Question 11:
What happens when basic metallic oxide combines with carbon dioxide? Give balanced chemical equation to represent the chemical change. [Level: Difficult]
Question 12:
Which among the following is crystalline allotrope of carbon built up from a hexagonal unit?
(a) Diamond
(c) Coal
(d) Coke [Level: Difficult]
Question 13:
What is organic chemistry? [Level: Easy]
Question 14:
Graphite has high melting point. Give one application where graphite is used because it is having high melting point. [Level: Difficult]
Question 15:
Which crystalline allotrope of carbon is opaque to light & good conductor of heat?
(a) Diamond
(c) Soot
(d) Graphite [Level: Moderate]
Question 16:
Which acid is formed when carbon dioxide dissolves in water? Give the balanced chemical equation. [Level: Moderate]
Question 17:
Gaseous product obtained when CO is passed over heated Iron (III) oxide.
(c) Iron (II) oxide
(d) Carbon [Level: Moderate]
Question 18:
Which among the following allotrope of carbon is formed when Rishabh burns candle?
(a) Coal gas
(b) Coal tar
(c) Coke
(d) Soot [Level: Moderate]
Question 19:
Which among the following is nitrogenous fertiliser obtained from carbon dioxide?
(a) Ammonia
(b) Ammonium
(d) Uric acid [Level: Moderate]
Question 20:
Which among the following is called silent killer?
(a) Carbon dioxide
(b) Carbogen
(d) Carbon [Level: Moderate]
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All About Daily Practice Problems on ICSE 8 Chemistry Carbon and Its Compounds NCERT Chapter 9
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