Science Chapter 4 Carbon And Its Compounds Quiz | CBSE Class 10

 

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Science Class 10 Chapter 4 Offline Quiz

NCERT Solutions Class 10 Science

Book:	National Council of Educational Research and Training (NCERT)
Board:	Central Board of Secondary Education (CBSE)
Class:	10th
Subject:	Science
Chapter:	4
Chapters Name:	Carbon and Its Compounds
Medium:	English

Q1.	Which amongst the following will conduct electricity?
	A. C6H12O6
	B. KCl(s)
	C. C2H5OH
	D. NaCl (aq)

Ans: NaCl (aq)

Q2.	Artificial flavour for orange is obtained from
	A. amyl acetate
	B. isoamyl valerate
	C. methyl butyrate
	D. octyl acetate

Ans: octyl acetate

Q3.	Which of the following contains covalent bond?
	A. MgCl2
	B. CaF2
	C. Al2O3
	D. HCl

Ans: HCl

Q4.	Assertion: Soaps are 100% biodegradable but do not work well with hard water. Reason: Some detergents are not bio-degradable but work well with hard water.
	A. Both A and R are true and R is the correct explanation of A.
	B. Both A and R are true but R is not the correct explanation of A.
	C. A is true but R is false.
	D. A is false but R is true.

Ans: Both A and R are true but R is not the correct explanation of A.

Q5.	Ethanol reacts with Na metal to form
	A. CH3ONa + H2
	B. C2H5ONa + H2
	C. CH3COONa + H2
	D. CH3C00H + H2O

Ans: C₂H₅ONa + H₂

Q6.	Carbon exists in the atmosphere in the form of
	A. carbon monoxide only
	B. carbon monoxide in traces and carbon dioxide
	C. carbon dioxide only
	D. coal

Ans: carbon monoxide in traces and carbon dioxide

Q7.	The number of covalent bonds in C4H10 is
	A. 10
	B. 8
	C. 13
	D. 12

Ans: 13

Q8.	Which of the following statements about graphite and diamond is true?
	A. They have the same crystal structure
	B. They have the same degree of hardness
	C. They have the same electrical conductivity
	D. They can undergo the same chemical reactions

Ans: They can undergo the same chemical reactions

Q9.	Which of the following is ethanol?
	A. CH3CHO
	B. CH3COOH
	C. CH3CH2
	D. CH3COOCH3

Ans: CH₃CH₂

Q10.	Solubility of alcohol in water is due to
	A. low density of alcohol
	B. volatile nature of alcohol
	C. ionisation
	D. hydrogen bonding

Ans: hydrogen bonding

Q11.	Butanone is a four carbon compound with the functional group
	A. carboxylic acid
	B. aldehyde
	C. ketone
	D. alcohol

Ans: Ketone

Q12.	Alcohols can be produced by the hydration of
	A. Alkenes
	B. alkynes
	C. alkanes
	D. acids

Ans: Alkenes

Q13.	The odour of acetic acid resembles that of
	A. Rose
	B. Burning Plastic
	C. Vinegar
	D. Kerosene

Ans: Vinegar

Q14.	Diamond is not a good conductor of electricity because
	A. It is very hard
	B. Its structure is very compact
	C. It is not soluble in water
	D. It has no free electrons to conduct electric current.

Ans: It has no free electrons to conduct electric current.

Q15.	The number of C-H bonds in ethane C2H6 molecule are
	A. 4
	B. 6
	C. 8
	D. 10

Ans: 6

Q16.	The by product in soap industry is
	A. Isoprene
	B. Ethylene glycol
	C. glycerol
	D. butane

Ans: glycerol

Q17.	Why does carbon form compounds mainly by covalent bonding?
	A. There are four electrons in the outermost shell of carbon.
	B. It requires large amount of energy to form C4+ or C4–
	C. It shares its valence electrons to complete its octet.
	D. All the above

Ans: All the above

Q18.	Which of the following will undergo addition reactions?
	A. CH4
	B. C3H8
	C. C2H6
	D. C2H4

Ans: C₂H₄

Q19.	When ethanoic acid is treated with NaHCO the gas evolved is
	A. H2
	B. CO2
	C. CH4
	D. CO

Ans: CO₂

Q20.	Soaps are formed by the saponification of
	A. Alcohols
	B. simple ester
	C. carboxylic acids
	D. glycerides

Ans: glycerides