Bihar Board - Class 12 - Chemistry - Chapter 10: Haloalkanes and Haloarenes Multiple Choice Questions ( MCQs)
The multiple choice questions for Chapter 10: Haloalkanes and Haloarenes of Class 12 Chemistry are provided here in English. These questions are based on the NCERT curriculum for Class 12. They are designed to help students assess their understanding of the key concepts covered in the chapter. These multiple choice questions will be useful not only for the Class 12 board exams but also for entrance exams like NEET. The questions for Bihar Board Class 12 Chemistry, Chapter 10: Haloalkanes and Haloarenes, have been prepared by expert teachers at Vidyakul.
Multiple Choice Question
1. Good conductor of electricity and heat is
(A) Anthracite coke
(B) Diamond
(C) Graphite
(D) Charcoal
Answer ⇒ (C) Graphite
2. In which of the following allotropes of carbon, percentage of carbon is maximum ?
(A) Wood charcoal
(B) Coconut charcoal
(C) Graphite
(D) None of these
Answer ⇒ (C) Graphite
3. The hybridisation of carbon in diamond is
(A) sp3
(B) sp2
(c) sp
(D) dsp2
Answer ⇒ (A) sp3
4. Organic compound must contain an element
(A) oxygen
(B) carbon
(C) hydrogen
(D) nitrogen
Answer ⇒ (B) carbon
5. Alkene gives which of the following reactions ?
(A) Addition reaction
(B) Substitution reaction
(C) Both (A) and (B)
(D) None of these
Answer ⇒(C) Both (A) and (B)
6. Single bond length between carbon-carbon is
(A) 1.34 Å
(B) 1.20 Å
(C) 1.54 Å
(D) none of these
Answer ⇒ (C) 1.54 Å
7. Valency of carbon is
(A) 1
(B) 2
(C) 3
(D) 4
Answer ⇒ (D) 4
8. Hybridisation of carbon in ethane is
(A) sp3
(B) sp2
(C) sp
(D) sp3d2
Answer ⇒ (A) sp3
9. Arrange the following alkyl halides in order of dehydrohalogenation
C2H5I , C2H5Cl , C2H5Br , C2H5F
(A) C2H5F >C2H5Cl>C2H5Br >C2H5I
(B) C2H5I >C2H5Br >C2H5Cl >C2H5F
(C) C2H5I >C2H5Cl> C2H5Cl>C2H5F
(D) C2H5F >C2H5I >C2H5Br>C2H5Cl
Answer ⇒ (B) C2H5I >C2H5Br >C2H5Cl >C2H5F
10. Tertiary alkyl halides are practically inert to substitution by SN2 mechanism because
(A) the carbocation formed is unstable
(B) there is steric hindrance
(C) there is inductive effect
(D) the rate of reaction is faster in SN2 mechanism
Answer ⇒ (B)there is steric hindrance
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