Carbon and Its Compounds MCQs Class-8 Dalal Simplified ICSE Chemistry Solutions Chapter-9

Carbon and Its Compounds MCQs Class-8 Dalal Simplified ICSE Chemistry Solutions Chapter-9, Carbon and Its Compounds Dr Viraf J Dalal Middle School Allied Publishers Solutions. Chapter-9. We Provide Step by Step Solutions to Name the following, Correct answer, Give balanced, Fill in the blanks, Give reasons of Dr Viraf J Dalal Middle School Chemistry Allied Publishers. Visit official Website CISCE for detail information about ICSE Board Class-8.

Carbon and Its Compounds MCQs Class-8 Dalal Simplified ICSE Chemistry Solutions Chapter-9

Board ICSE
Class 8th
Subject Chemistry
Book Name Dalal New Simplified
Chapter-9 Carbon and Its Compounds
Unit-1 Carbon and Its Compounds
Topic Solution of exercise MCQs
Session 2023-24

Objective Types Questions

Carbon and Its Compounds MCQs Class-8 Dalal Simplified ICSE Chemistry Solutions Chapter-9

Question: 1. Name the following :

1. A crystalline allotrope of carbon built up from a hexagonal unit.

Answer: Graphite

2. An allotrope of carbon used for the manufacture of coke.

Answer: Coal

3. An amorphous allotrope of carbon which floats on water.

Answer: Wood charcoal

4. An acid formed when carbon dioxide is dissolved in water under pressure.

Answer: Carbonic acid

5. The gaseous product obtained when carbon monoxide is passed over heated iron [II] oxide.

Answer: Carbon dioxide

Question: 2. Select the correct answer from A, B, C, D and E for each statement given below :

A : Anthracite     B : Diamond     C : Carbogen     D : Urea        E: Lampblack

1. An allotrope of carbon used as a tip for deep boring drills. A: Diamond     
2. The type of coal with the highest carbon content. B: Anthracite 
3. An allotrope of carbon obtained by burning kerosene oil in a limited supply of air. C: Lampblack
4. A nitrogenous fertilizer obtained from carbon dioxide. D: Urea   
5. A compound which finds use for a victim of carbon monoxide poisoning. E: Carbogen

Question: 3. Give a balanced equation for the following conversions : [In one or two steps]

1. Coke to water gas
2. Calcium bicarbonate to calcium nitrate using a dilute acid.
3. Lime water to calcium bicarbonate.
4. Carbon dioxide to carbon
5. A metallic oxide to calcium carbonate.

Answer: 

Give a balanced equation for the following conversions[In one or two steps]

Question: 4. Complete the statements by filling the blanks with the correct word from the bracket.

1. The crystal of __graphite__ [diamond/graphite] is opaque to light and is a good conductor of heat.

2. A graphite-clay mixture baked at high temperature is used in making __refractory crucibles__ [lubricants/refractory crucibles]

3. Adsorption capacity of wood charcoal is increased by passing __steam__ [carbon dioxide/steam] over wood charcoal, at high temperature.

4. __organic__ [organic/inorganic] chemistry is the chemistry of carbon compounds mainly of ‘carbon’, ‘hydrogen’ & ‘oxygen’.

5. Sodium oxide combines with carbon dioxide to give __sodium carbonate__ [sodium carbonate/sodium bicarbonate]

Question: 5. Give reasons for the following :

1. Diamond & graphite are allotropic modifications of carbon.
2. It is dangerous to stand behind a running engine of a vehicle.
3. Both CO2 & SO2  turn lime water milky. Moist potassium permanganate paper helps in distinguishing the two gases.
4. Carbon monoxide and not carbon dioxide is highly poisonous gas.
5. Lime water finds application for testing both carbon dioxide & carbon monoxide gas individually.

Answer: 

1. Diamond & graphite are allotropic modifications of carbon.

Diamond & graphite are carbon elements, their chemical properties are same i.e. they form CO2  on burning but differ in physical state. Hence they are allotropic modifications.

2. It is dangerous to stand behind a running engine of a vehicle.

A running engine produces carbon monoxide in the form of smoke it releases, which is dangerous for humans.

3. Both SO2 and  CO2. turn lime water milky. Moist potassium permanganate paper helps in distinguishing the two gases.

SO2 turns the moist purple potassium permanganate paper to colourless, while CO2 gas has no effect on the moist purple permanganate.

4. Carbon monoxide and not carbon dioxide is highly poisonous gas.

Carbon monoxide is considered highly poisonous because it combines with haemoglobin in the blood of a human body. It ultimately decreases the oxygen carrying capacity of blood.

5. Lime water finds application for testing both carbon dioxide & carbon monoxide gas individually.

Carbon monoxide and carbon dioxide are passed through lime water. Carbon monoxide does not turn the lime water milky, while carbon dioxide turns limewater milky.

– : End of Carbon & Its Compound MCQs Class-8 Dalal Solutions :–

Return to –  Dalal Simplified Chemistry for ICSE Class-8 Solutions

Thanks

Share with your friends. 

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.