Carbon and Its Compounds Class 10 Practice Questions
Carbon and Its Compounds Class 10 Practice Questions
Que 1. Write the molecular formula of the first two members of the homologous series having a functional group — Cl.
Que 2. Why covalent compounds are volatile in nature with low boiling and low melting point?
Que 3. Give the names of the following functional groups:
(i) — OH (ii) — COOH
Que 4. Unsaturated hydrocarbon gives a yellow flame with a lot of black smoke when burnt in oxygen. Give reason.
Que 5. State the valency of each carbon atom in (i) an alkane and (ii) an alkyne
Que 6. State two characteristic features of carbon which when put together give rise to many carbon compounds.
Que 7. Explain why washing clothes with hard water is not effective.
Que 8. Diamond is a poor conductor of electricity while graphite is a good conductor. Assign reason
Que 9. Give reasons for the following observations:
(a) The element carbon forms a huge number of compounds.
(b) Air holes of a gas burner have to be adjusted when the heated vessels get blackened by the flame.
Que 10. What will you observe on adding a 5% alkaline KMnO4 solution drop by drop to some warm ethanol taken in a test tube? Write the name of the compound formed during the above chemical reaction.
Carbon and Its Compounds Class 10 Practice Questions
Que 11. Which of the following metal is used as a catalyst in hydrogenation?
(a) Cu
(b) Ni
(c) Fe
(d) Na
Que 12. 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
Que 13. Which of the following gases is called ‘marsh gas’
(a) H2
(b) CH4
(c) C2H4
(d) C2H2
Que 14. Which of the following is a crystalline form of carbon?
(a) Charcoal
(b) Coal
(c) Graphite
(d) Lamp black
Que 15. A carbon compound contains two atoms of carbon. Which name should the carbon compound bear?
(a) Butane
(b) Ethane
(c) Methane
(d) Propane
Que 16. Which substance burns without producing flame?
(a) Candle
(b) Charcoal
(c) Wood
(d) LPG
Que 17. Which of the following is not the property of a homologous series?
(a) They show similar chemical properties.
(b) They differ by 14 units by mass.
(c) They all contain a double bond
(d) They can be represented by a general formula.
Que 18. 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
Que 19. Which of the following statements regarding graphite is not correct?
(a) Graphite is a black and soft crystalline substance
(b) Graphite is manufactured by heating coke at 3000 0C.
(c) Graphite is a bad conductor of heat and electricity.
(d) Graphite possesses a metallic luster and soapy touch.
Que 20. A student conducts an activity where he burns methane in the presence of oxygen. What is likely to form?
(a) Water
(b) Carbon dioxide
(c) Carbon dioxide and water
(d) Carbon dioxide and oxygen
Que 21. It is a product of the soap industry
(a) Glycerol
(b) Glucose
(c) Ester
(d) Propanal
Que 22. The difference between two consecutive members in a homologous series in alkanes in terms of molecular mass and number of atoms of elements are
(a) 14 a.m.u and CH2 respectively
(b) 12 a.m.u and CH3 respectively
(c) 14 a.m.u and CH respectively
(d) 12 a.m.u and CH3 respectively
Que 23. The final product of the chlorination of methane in the sunlight is
(a) CHCl3
(b) CH2Cl2
(c) CHCl3
(d) CCl4
Que 24. The isomers always possess similar
(a) Chemical properties
(b) Molecular formula
(c) Physical properties
(d) Structural formula
Que 25. A student conducts an activity, where he took a naphthalene ball and burns it. He observed that it gives a yellow flame with lots of black smoke and sooty deposits around it. What type of hydrocarbon does naphthalene contain?
(a) Unsaturated, as black smoke represents complete combustion
(b) Unsaturated, as sooty deposit represents unburnt hydrocarbons
(c) Saturated, as it gives a yellow flame which represents complete combustion
(d) Saturated, as the burning of any substance represents a complete combustion
Que 26. Which of the following is used in cough syrups
(a) Sugar-methanol
(b) Methanol
(c) Ethanol-methanol
(d) Sugar-ethanol
Que 27. Write the name and structure of a saturated compound in which 6 carbon atoms are arranged in a ring.
(a) Hexane
(b) Cyclohexane
(c) Pentane
(d) Cyclopentane
Que28. 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
Carbon and Its Compounds Class 10 Practice Questions
Assertion and Reason
In the following questions, a statement of assertion (A) is followed by a statement of the reason (R). Mark the correct choice as:
(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.
(e) Both Assertion and Reason are false.
Que 29. Assertion (A): Graphite is slippery to the touch.
Reason (R): The various layers of carbon atoms in graphite are held together by weak van der Wall forces.
Que 30. Assertion (A): Following are the members of a homologous series: CH3OH, CH3CH2OH, CH3CH2CH2OH.
Reason (R): A series of compounds with the same functional group but differing by ––CH2 – unit is called a homologous series.
Que 31. Assertion (A): Most carbon compounds are good conductors of electricity.
Reason (R): They do not dissociate to form ions and remain as molecules.
Que 32. Assertion (A): Cyclopropane is a heterocyclic compound.
Reason (R): Cyclopropane comes into the category of those compounds in which a complete ring is formed by carbon atoms only.
Que 33. Assertion (A): Most carbon compounds are good conductors of electricity.
Reason (R): They do not dissociate to form ions and remain as molecules.
Que 34. Assertion (A): The third member of an alkane is propane (C3H8).
Reason (R): It is obtained from the general formula CnH2n + 2
Que 35. Assertion (A): Propene reacts with HBr to give isopropyl bromide.
Reason (R): The addition of Br2 to alkene place it faster in the presence of ionising substance.
Carbon and Its Compounds Class 10 Practice Questions
