Chemistry MCQS

491. Which of the following is a secondary alkyl halide?
(A) CH3CH2Cl
B) CH3CHClCH3
(C) (CH3)3CCl
(D) CH3CH2CH2Cl

492. Which of the following is a tertiary alkyl halide?
(A) CH3CH2Cl
(B) CH3CHClCH3
C) (CH3)3CCl
(D) CH3CH2CH2Cl

493. The reaction between an alkyl halide and a hydroxide ion (OH-) is an example of:
(A) Substitution
(B) Addition
C) Elimination
(D) Condensation

494. The reaction between an alkyl halide and a nucleophile is an example of:
A) Substitution
(B) Addition
(C) Elimination
(D) Condensation

495. The reaction between an alkyl halide and a metal (e.g., lithium or magnesium) is an example of:
(A) Substitution
B) Addition
(C) Elimination
(D) Condensation

496. Alkyl halides undergo nucleophilic substitution reactions due to the presence of:
(A) A halogen atom
(B) A hydroxyl group
(C) A carbonyl group
D) A nucleophile

497. The reaction between an alkyl halide and ammonia (NH3) is an example of:
A) Substitution
(B) Addition
(C) Elimination
(D) Condensation

498. When alumina is placed in the path of cathode rays, it glows?
(A) Red
B) Blue
(C) Green
(D) Black

499. e/m values in cathode rays?
(A) Do not depend upon the nature of gas
B) Depend upon the nature of gas
(C) Depends on the amount of air
(D) None of the above

500. In the discharge tube, in which direction do cathode rays travel?
(A) Diagonal to the surface of the cathode
(B) Horizontal to the surface of the cathode
C) Perpendicular to the surface of the cathode
(D) Spread on the surface of the cathode