Mcq Std 12 Chemistry

Good Essays
Topics: Alkene, Chlorine, Methane
L-6 MCQ

(A) MCQs of the Textual Exercise

1) In haloalkane _________ bond is formed between carbon and halogen.

(a) Ionic (b) van der Waals (c) Covalent (d) hydrogen

2) In haloarene compounds, halogen combines with carbon having which hybridization?

(a) sp2 (b) sp3 (c) sp (d)dsp2

3) In haloalkane, carbon in C-X bond possesses which partial electric charge?

(a) Charge less (b) positive (c) negative (d) anionic

4) Which of the following bonds is the strongest?

(a) (b) (c) (d)

5) Which of the following is vinyl halide?

(a) CH2CL2 (b) CH2= CH-Cl (c) CH = C-Cl (d)

6) What is B in R-OH + PX5 R-X +B+ HX?

(a) HPOX3 (b) H3PO3 (c) POX3 (d) H3PO2

7) Which catalyst is used in preparation of bromobenzene by bromination of benzene?

(a)FeBr3 (b) HBr (c) AlBr3 (d) Br2

8) By which name the reaction CH3 - Br + Ag- F CH3F + AgBr is known?

(a) Grignard (b) Wurtz (c) Fitting (d) Swartz

9) What are nucleophilic reagents according to Lewis theory?

(a) Acid (b) Base (c) Neutral molecules (d) Positive ions

10) On which of the following factors the stability of carboncation depends?

(a) Resonance (b) Temperature (c) Transition state (d) Reaction rate

11) What is called an optically active substance?

(a) which reflects polarized light (b) which rotates the plane of polarized light

(c) which increases rate of polarized light (d) which absorbs polarized light

12) Arrange giving the sequence orde to Br, Cl, F and H combined with asymmetric carbon.

(a) H,Cl,Br, F (b) H,Cl, F, Br (c) Br,Cl, F , H (d) H,F ,Br, Cl

13) 2C6H5- X +2 Na A + 2 NaX . What will be the product A obtained in the reaction?

(a) C6H5Cl (b) C12H10 (c) C6H5-C6H5 (d) C6H5Na

14) Which is the structural formula of DDT?

(a) (b) (c) (d)

15) Which is substance is inflammable?

(a) DDT (b) Freon (C) CHI3 (d) CHCl3

(B) MCQs based on TEXT-BOOK

1) Mark MCQs

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