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carbon and its compounds

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

carbon occurs in combined state. true or false

a)

true

b)

false

2.

which of the following object does not contain carbon.

a)

diamond

b)

glass

c)

marble

d)

none of the above

3.

what is the chemical formula of calamine.

a)

ZnCo

b)

CaCo3

c)

Na2Co3

d)

Znco3

4.

choose the 2 classes of all compounds.

a)

inorganic, artificial

b)

organic, artificial

c)

inorganic, organic

d)

organic, natural

5.

choose crystalline forms of carbon.

a)

graphite

b)

fullerences

c)

charcoal

d)

coke

6.

SiC ----heat-----> Si + C (charcoal)

a)

true

b)

false

7.

which is the biggest diamond ever found.

a)

cullinian

b)

pitt

c)

kohinoor

d)

moon of baroda

8.

what is the formula of the most common fullerence

a)

C30

b)

C40

c)

C60

d)

C35

9.

tick the correct order of purity of coal

a)

peat - anthracite - lignite - butiminous

b)

anthracite - bituminous - lignite - peat

c)

peat - lignite - anthracite - bituminous

d)

peat - lignite - bituminous - anthracite

10.

chose correct diagram for destructive distructive distillation.

a)
b)
11.

2NaHCO3 ----heating----> + H2O + CO2

a)

NaCO

b)

Na2CO

c)

Na3CO2

d)

Na2CO3

12.

carbogen contains

a)

90% CO2 10% O

b)

90% CO2 5% O 5% methane

c)

95% CO2 5% O

d)

95% O 5% CO2

13.

what is inside of glass tube of a foam type fire extinguisher

a)

sulphuric acid

b)

aluminium sulphate

14.

tick the gasses which result in global warming

a)

carbon dioxide

b)

Methane

c)

Oxygen

d)

carbon mono oxide

15.

Carbon monoxide is non poisonous gas

a)

true

b)

false

16.

what is the name of goverments scheme to reduce the air pollution caused by burning chrcoal.

a)

pradhan mantri gram vikas yojna

b)

pradhan mantri ujwalla yojna

17.

which is the most commonly used coal type for industries

a)

peat

b)

antracite

c)

bituminous

d)

lignite

18.

carbon di oxide is heavier than air

a)

true

b)

false

19.

carbon mono oxide does not support extraction of metals from their oxides

a)

true

b)

false

20.

carbon di oxide turn lime water milky

a)

true

b)

false

21.

choose the wrong statement

a)

carbon monoxide is a thermally stable gas

b)

carbon di oxide is heavier than air

c)

graphite is an non crystalline form of carbon

d)

all are correct

22.

fullerences are found in

a)

igneous rocks

b)

asteroids

c)

solar winds

d)

instastellar dust

23.

CuO + CO ----heat-----> Cu + CO2

a)

true

b)

false

24.

formula of oxallic acid

a)

COH

b)

COOH

c)

(COOH)2

d)

(COH)3

25.

formula of ethyl alcohol

a)

C2H5OH

b)

CHOH

c)

C2H3OH