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Carbon and its Compounds: Class 10 Chemistry MCQ

1. Which of the following is not a saturated hydrocarbon?

  • (i) cyclohexane 
  • (ii) benzene
  • (iii) butane 
  • (iv) isobutene 

2. The bond between two identical non metallic atom has a pair of electron? 

  • (i) un-equally shared between two atoms.
  • (ii) transferd completely from one atom to another
  • (iii) with identical spins 
  • (iv) equally shared between them

3. Covalent compounds are generally 

  • (i) soluble in water 
  • (ii) insoluble in water 
  • (iii) ionize in water 
  • (iv) hydrolyse in water 

4. Propane with the molecular formula C3H8 has 

  • (i) 7covalent bonds 
  • (ii) 8 covalent bonds
  • (iii) 9 covalent bonds 
  • (iv) 10 covalent bonds

5. A hydrocarbon reacts with ammonical cuprous chloride solution to form a red precipitate. The hydrocarbon is

  • (i) ethane
  • (ii) ethene
  • (iii) butane
  • (iv) 1-propyne 

6. Which of the following substance is added to denature Ethanol? 

  • (i) methanol 
  • (ii) pyridine 
  • (iii) copper sulphate 
  • (iv) all of them 

7. Which of the following is not an allotropic form of carbon 

  • (i) fluorine 
  • (ii) fullerene 
  • (iii) diamond 
  • (iv) graphite 

8. Which of the following represents the correct decreasing order of hydrogen atoms? 

  • (i) alkanes, alkenes, alkynes 
  • (ii) alkanes, alkaynes, alkenes 
  • (iii) alkenes, alkynes, alkanes 
  • (iv) alkynes, alkanes, alkenes 

9. Detergents are sodium or potassium salts of long chain of

  • (i) aldehydes 
  • (ii) ketones 
  • (iii) carboxylic acid 
  • (iv) sulphonic acid 

10. Which of the following represents the structure of N2 molecule? 

  • (i) N ≡ N 
  • (ii) N = N 
  • (iii) N - N 
  • (iv) None of the above 

11. In double covalent bond there is sharing of

  • (i) 2 electrons
  • (ii) 4 electrons
  • (iii) 6 electrons
  • (iv) 3 electrons 

12. Cation is formed when 

  • (i) atom gains electrons 
  • (ii) atom loses electrons 
  • (iii) proton is lost by the atom 
  • (iv) atom shared by electrons 

13. The total number of electrons that take part in forming a bond in N2 is 

  • (i) 2 
  • (ii) 4 
  • (iii) 6 
  • (iv) 10 

14. Which of the following has the weakest carbon-carbon strength? 

  • (i) C2H2 
  • (ii) C2H4 
  • (iii) C2H6 
  • (iv) all have the same bond strength 

15. Which of the following salt when dissolved in water produces hard water?

  • (i) Calcium sulphate 
  • (ii) Magnesium bicarbonate 
  • (iii) Calcium chloride 
  • (iv) Any of the above

Answers

  1. (ii) benzene 
  2. (iv) equally shared between them 
  3. (ii) in soluble in water 
  4. (iv) 10 covalent bond 
  5. (iv) 1-propyne 
  6. (iv) all of them 
  7. (i) fluorine 
  8. (i) alkanes, alkenes, alkynes 
  9. (iv) sulphonic acid 
  10. (i) N ≡ N 
  11. (ii) 4 electrons 
  12. (ii) atom loses the electrons 
  13. (iii) 6 
  14. (i) C2H2
  15. (iv) any of the above

Comments  

 
#1 yogesh bansal 2014-12-14 09:24
these are some bit reasoning question
Quote
 

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