Class 10 Chemistry Exam MCQs – Practice Test 4 (Chapter 8)

Hydrocarbons Notes Questions with Answers PDF – Test 4

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Hydrocarbons Notes Q&A PDF Download – Practice Test 4

MCQ 16: Which of the following are saturated hydrocarbons?

alkanes
alkenes
alkynes
alkyl radicals

MCQ 17: How does iodine react?

explosively
slowly in dark but rapidly in strong sunlight
requires high temperature or strong sun light
essentially unreactive

MCQ 18: Which of the following is not true about lighter alkanes?

their combustion can be controlled
they produce large amount of heat per gram
they are expensive and rare
they are widely used as fuel

MCQ 19: What is the color of the flame with which most alkanes burn?

orange
yellow
red
blue

MCQ 20: What type of reaction do alkynes undergo across the triple bond?

elimination reaction
substitution reaction
addition reaction
halogenation

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