Test-MCQ Class 10-NCERT -Science-Chapter 4-Test-3 Chapter 4: Carbon and its Compound Multiple Choice Questions No of Questions : 20 Marks: 20 Please enter your email: 1. Which of the following is the correct representation of electron dot structure of nitrogen? b a c d 2. Structural formula of ethyne is a d b c 3. Pentane has the molecular formula C5 H12. It has 16 covalent bonds 17 covalent bonds 12 covalent bonds 5 covalent bonds 4. Ethanol reacts with sodium and forms two products. These are sodium ethanoate and hydrogen sodium ethanoate and oxygen sodium ethoxide and hydrogen sodium ethoxide and oxygen 5. The correct structural formula of butanoic acid is a b c d 6. The correct electron dot structure of a water molecule is c b d a 7.The name of the compound CH3 — CH2 — CHO is Propanone Ethanal Ethanol Propanal 8. Which of the following represents saponification reaction? c a d b 9. The first member of alkyne homologous series is propyne ethyne methane ethene 10. Drinking alcohol stands for isopropyl alcohol propyl alcohol ethyl alcohol methyl alcohol 11. 1-propanol and 2-propanol are chain isomers homologues position isomers functional isomers 12. The polar end of the sodium stearate soap molecule C17H35COONa contains ____. c18 NA CH3(CH2)16– chain -COO–Na+ group 13. The functional group of ketones is 0 “>C=O” COOH CH=O 14. The structural formula 2-butene is CH3 = CH – CH2 – CH3 CH3 = CH – CH3 – CH = CH – CH3 CH3 – C ≡ C – CH3 16. Which of the following represents cyclohexane: C6H6 C6H10 C6H14 C6H12 17. The chlorination of methane, is an example of ? addition reaction substitution chain reaction elimination reaction reduction reaction 18. 100% pure ethyl alcohol is called none of the any rectified sprit absolute alcohol denatured alcohol 19. The odour of acetic acid resembles that of: Kerosene Lemon juice Tomato Vinegar 20. which of the following has a double bond lemon molecule diamond molecule oxygen molecule NA Loading … Question 1 of 19
