General Science MCQ – 45 (Chemistry)

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1. A compound having a bond angle 180^o is?
(A) Alkyne
(B) Alkane
(C) Alkene
(D) Cycloalkane

2. C₆H₅CHO is formed when C6H6 is treated with CO and HCI in the presence of anhydrous AICI₃. Name of the reaction is?
(A) Friedel crafts reaction
(B) Gattermann Koch reaction
(C) Rosenmund reaction
(D) Stephen reaction

3. Isopropyl iodide is formed after reaction of propene with HI, this is due to?
(A) More stable free radical
(B) Homolysis
(C) More stable carbanion
(D) More stable carbocation

4. Which among the following reagent can be used to distinguish between CH₂BrCH=CH₂ from CH₃CH=CHBr?
(A) Br₂/CCI₄
(B) Cold KMno₄
(C) AgNO₃/C₂H₅OH
(D) Ag(NH₃)2OH

5. Which one of the following compounds forms salt on reaction with NaNH₂?
(A) C₂H₂
(B) C₂H₆
(C) C₆H₆
(D) C₂H₄

6. Which one of the following halides can be used in the friedel-crafts reaction?
(A) Isopropyl chloride
(B) Bromobenzene
(C) Chlorobenzene
(D) Chloroethene

7. Choose the process by which liquid hydrocarbons can be converted to gaseous hydrocarbons?
(A) Hydrolysis
(B) Oxidation
(C) Cracking
(D) Distillation under reduced pressure

8. The product obtained on heating 2-Bromopentane with potassium ethoxide in ethanol is?
(A) 1-pentene
(B) 2-cis- pentene
(C) Trans-2- pentene
(D) 2-ethoxy pentene

9. Identify the given reaction:
CH₃ CH₂ CH = CH₂ H Br/ H₂O₂ Y C₂H₅ONa Z?
(A) (CH₃)₂-CH-O-CH₂CH₃
(B) CH₃-( CH₂)₄-O- CH₃
(C) CH₃– CH(CH)₃-O- CH₂ CH₃
(D) CH₃-( CH₂)₃-O- CH₂ CH₃

10. Find the correct order of increasing acidity?
(A) CH = CH > CH₂ = CH₂ > CH₃ – C = CH > CH₃ – CH₃
(B) CH₃ – CH₃ > CH₂ = CH₂ > CH₃ – C = CH > CH = CH
(C) CH₂ = CH₂ > CH₃ – CH = CH₂ > CH₃ – C = CH > CH = CH
(D) CH = CH > CH₃ – C = CH > CH₂ = CH₂ > CH₃ – CH₃