Class 10 chemistry MCQs with answers are provided here for chapter 4 Carbon and its Compounds. These MCQs are based on the CBSE board curriculum and correspond to the most recent Class 10 chemistry syllabus. Students who wish to do well in their CBSE board exams should study MCQ Questions for Class 10 Science with Answers PDF Free Download. Students can boost their board exam scores by practising chapter-by-chapter CBSE Class 10 Science Multiple Choice Questions with Answers.
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Class 10 Carbon and its Compounds MCQs
1. Hydrocarbons are organic molecules that contain the element carbon.
a) Hydrogen
b) Oxygen
c) Carbon
d) Both hydrogen and carbon
Answer: d
Explanation: The word hydrocarbons come from the fact that these organic substances are formed entirely of carbon and hydrogen.
2. Give the name of the benzene acylation procedure.
a) Friedel craft reaction
b) Wurtz reaction
c) Wurtz fitting reaction
d) Debey Huckel reaction
Answer: a
Explanation: Friedel craft reaction is an electrophilic substitution reaction that occurs between ethanoyl chloride and benzene.
3. Alkane chlorination is an example of _____
a) Radical
b) Elimination
c) Free radical
d) Addition
Answer: c
Explanation: A reaction in which a chlorine atom is substituted for a hydrogen atom on an alkane is known as free radical chlorination.
4. Which of the chemicals below does not have a carbonyl group?
a) Alcohol
b) Aldehyde
c) Ketone
d) Carboxylic acid
Answer: a
Explanation: Carbonyl groups have a double bond between carbon and oxygen. Alcohols do not have a carbonyl group since the bond between C and O is a single bond.
5. Butanal is known by what name?
a) n-Butanaldehyde
b) α-Butanaldehyde
c) n-Butyraldehyde
d) α-Butyraldehyde
Answer: c
Explanation: Butanal is a four-carbon aldehyde, including the carbonyl group, with a straight chain. Because there are no substituents in the carbon chain, the prefix n- is used in the common name.
6. 3-Phenylprop-2-enal is another name for the chemical _________
a) Crotonaldehyde
b) Cinnamaldehyde
c) Salicylaldehyde
d) Vanillin
Answer: b
Explanation: A benzene ring is connected to the end carbon of the aldehyde chain, and there is a carbon double bond at the alpha carbon in cinnamaldehyde. C6H5-CH=CH-CHO is its formula.
7. Why are Germanium hydrides called _____________
a) silanes
b) germanes
c) stannum
d) plumbane
Answer: b
Explanation: Carbon hydrides are known as alkanes, alkenes, or alkynes, whereas silicon hydrides are known as silanes, and germanium hydrides are known as Germanes. The sole hydrides of stannane and plumbum are stand and plumbane.
8. Which of the following elements from Group 14 is a metal?
a) Germanium
b) Carbon
c) Stannum
d) Silicon
Answer: c
Explanation: Carbon is made up of five elements: carbon, silicon, germanium, stannum, and plumbum. Non-metals include carbon and silicon, metalloids include germanium and metals include stannum and plumbum.
9. What exactly is the fajan’s rule?
a) electronegativity
b) ionic compounds
c) Oxidation State
d) covalent compounds
Answer: c
Explanation: The Fajan’s rule states that compounds in the +2 oxidation state are ionic in nature, whereas compounds in the +4 oxidation state are covalent in nature; thus, the Fajan’s rule is about oxidation state and compound nature.
10. Which of the following carbon allotropes is amorphous?
a) Diamond
b) Fullerenes
c) Graphite
d) Lampblack
Answer: d
Explanation: Lampblack is an amorphous form of carbon that is obtained by burning vegetable oils in a limited supply of air and is used in the manufacture of printing ink, black paint, varnish, and carbon paper. Diamond, fullerenes, and graphite are crystalline allotropes of carbon, whereas diamond, fullerenes, and graphite are amorphous allotropes of carbon.
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