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? a d c b 2. Structural formula of ethyne is c b a d 3. Pentane has the molecular formula C5 H12. It has 17 covalent bonds 5 covalent bonds 12 covalent bonds 16 covalent bonds 4. Ethanol reacts with sodium and forms two products. These are sodium ethanoate and oxygen sodium ethanoate and hydrogen sodium ethoxide and hydrogen sodium ethoxide and oxygen 5. The correct structural formula of butanoic acid is d b c a 6. The correct electron dot structure of a water molecule is b c a d 7.The name of the compound CH3 — CH2 — CHO is Ethanol Ethanal Propanone Propanal 8. Which of the following represents saponification reaction? a d b c 9. The first member of alkyne homologous series is ethene propyne methane ethyne 10. Drinking alcohol stands for ethyl alcohol methyl alcohol isopropyl alcohol propyl alcohol 11. 1-propanol and 2-propanol are homologues chain isomers position isomers functional isomers 12. The polar end of the sodium stearate soap molecule C17H35COONa contains ____. -COO–Na+ group c18 NA CH3(CH2)16– chain 13. The functional group of ketones is COOH 0 “>C=O” CH=O 14. The structural formula 2-butene is CH3 – C ≡ C – CH3 CH3 = CH – CH3 – CH = CH – CH3 CH3 = CH – CH2 – CH3 16. Which of the following represents cyclohexane: C6H10 C6H6 C6H14 C6H12 17. The chlorination of methane, is an example of ? elimination reaction reduction reaction addition reaction substitution chain reaction 18. 100% pure ethyl alcohol is called rectified sprit absolute alcohol denatured alcohol none of the any 19. The odour of acetic acid resembles that of: Lemon juice Vinegar Tomato Kerosene 20. which of the following has a double bond NA lemon molecule diamond molecule oxygen molecule Loading … Question 1 of 19
