UPTET Carbon and Its Compounds Important Questions with Answers

Carbon and Its Compounds is one of the most important Chemistry chapters in the UPTET syllabus, and questions from this topic are frequently asked in the exam. Students often face confusion in areas such as functional groups, allotropes of carbon, hydrocarbons, and chemical reactions, making last-minute revision difficult without proper practice material.

Practising previous year questions (PYQs) is one of the most effective ways to prepare for UPTET Science. PYQs help candidates understand the actual exam pattern, repeated concepts, and the level of difficulty commonly asked in the examination.

UPTET Exam Weightage of Carbon and Its Compounds

In UPTET, candidates can expect around 2–4 questions from Carbon and Its Compounds and related Chemistry concepts. Important areas usually include functional groups, saturated and unsaturated hydrocarbons, allotropes of carbon, soaps and detergents, ethanol and ethanoic acid reactions, covalent bonding, and chemical properties of carbon compounds. 

Since many questions are straightforward, factual, or application-based, proper revision of PYQs can significantly improve accuracy. 

UPTET Science Important MCQs on Carbon and Its Compounds 

Q1. 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

Answer: (b) carbon monoxide in traces and carbon dioxide

Q2. Which of the following statements are usually correct for carbon compounds?
(i) are good conductors of electricity
(ii) are poor conductors of electricity
(iii) have strong forces of attraction between their molecules
(iv) do not have strong forces of attraction between their molecules

(a) (i) and (iii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)

Answer: (d) (ii) and (iv)

Q3. A molecule of ammonia (NH3) has:
(a) only single bonds
(b) only double bonds
(c) only triple bonds
(d) two double bonds and one single bond

Answer: (a) only single bonds

Q4. Buckminsterfullerene is an allotropic form of:
(a) phosphorus
(b) sulphur
(c) carbon
(d) tin

Answer: (c) carbon

Q5. Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of:
(a) Addition reaction
(b) Substitution reaction
(c) Displacement reaction
(d) Oxidation reaction

Answer: (a) Addition reaction

Q6. In which of the following compounds, -OH is the functional group?
(a) Butanone
(b) Butanol
(c) Butanoic acid
(d) Butanal

Answer: (b) Butanol

Q7. The soap molecule has a:
(a) hydrophilic head and a hydrophobic tail
(b) hydrophobic head and a hydrophilic tail
(c) hydrophobic head and a hydrophobic tail
(d) hydrophilic head and a hydrophilic tail

Answer: (a) hydrophilic head and a hydrophobic tail

Q8. Identify the unsaturated compounds from the following:
(i) Propane
(ii) Propene
(iii) Propyne
(iv) Chloropropane

(a) (i) and (ii)
(b) (ii) and (iv)
(c) (iii) and (iv)
(d) (ii) and (iii)

Answer: (d) (ii) and (iii)

Q9. Chlorine reacts with saturated hydrocarbons at room temperature in the:
(a) absence of sunlight
(b) presence of sunlight
(c) presence of water
(d) presence of hydrochloric acid

Answer: (b) presence of sunlight

Q10. Pentane has the molecular formula C5H{12}. It has:
(a) 5 covalent bonds
(b) 12 covalent bonds
(c) 16 covalent bonds
(d) 17 covalent bonds

Answer: (c) 16 covalent bonds

Q11. Name the functional group present in CH3COCH3:
(a) Alcohol
(b) Carboxylic acid
(c) Ketone
(d) Aldehyde

Answer: (c) Ketone

Q12. The portion of the atmosphere that contains O_3 and is responsible for absorbing UV rays is:
(a) Troposphere
(b) Stratosphere
(c) Mesosphere
(d) Ionosphere

Answer: (b) Stratosphere

Q13. The first organic compound synthesized in the laboratory was:
(a) CH4
(b) CH3COOH
(c) NH2CONH (Urea)
(d) C2H2

Answer: (c) NH2CONH (Urea)

Q14. The functional group present in carboxylic acid is:
(a) -OH
(b) -CHO
(c) C=O
(d) -COOH

Answer: (d) -COOH

Q15. Vinegar is a solution of:
(a) 50% – 60% acetic acid in alcohol
(b) 5% – 8% acetic acid in alcohol
(c) 5% – 8% acetic acid in water
(d) 50% – 60% acetic acid in water

Answer: (c) 5% – 8% acetic acid in water

Q16. Which of the following is not an allotrope of carbon?
(a) Diamond
(b) Graphite
(c) Buckminsterfullerene
(d) Benzene

Answer: (d) Benzene

Q17. Ethanol reacts with sodium and forms two products. These are:
(a) sodium ethanoate and hydrogen
(b) sodium ethanoate and oxygen
(c) sodium ethoxide and hydrogen
(d) sodium ethoxide and oxygen

Answer: (c) sodium ethoxide and hydrogen

Q18. The correct structural formula of butanoic acid is:

CH3−CH2−CH2−COOHCH_3-CH_2-CH_2-COOHCH3​−CH2​−CH2​−COOH

(a) CH3-CH2-CH2-COOH
(b) CH3-CH2-COOH
(c)CH3-CH2-CH2-CH2-COOH
(d) CH3-COOH

Answer: (a)

Q19. Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g., hydrogen. After the formation of four bonds, carbon attains the electronic configuration of:
(a) Helium
(b) Neon
(c) Argon
(d) Krypton

Answer: (b) Neon

Q20. The heteroatoms present in CH3-CH2-O-CH2-CH2Cl are:
(i) Oxygen
(ii) Carbon
(iii) Hydrogen
(iv) Chlorine

(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)

Answer: (d) (i) and (iv)

Carbon and Its Compounds is a highly important and scoring topic in the UPTET Science syllabus. Since questions from this chapter are frequently asked, candidates should focus on understanding core concepts such as functional groups, hydrocarbons, allotropes, covalent bonding, and important chemical reactions. 

Practising PYQs is one of the best ways to improve conceptual clarity, recognise repeated question patterns, and strengthen exam readiness. Regular revision of these questions can help candidates improve accuracy, save time during the exam, and maximise their score in the Science section.