12th Class Chemistry Quiz Ranking Challenge

12th Class Chemistry Quiz Ranking Challenge Announcing the national 12th Class Monthly Chemistry Quiz Ranking Competition of 2025!

The national 12th Class Chemistry Quiz Ranking Competition of 2025 invites all 12th students with a passion for chemistry to put their knowledge to the test. No registration fees required, just pure scientific enthusiasm!

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Time: 30 Minutes for 20 Question.

Class 12th Chemistry Quiz Contest [June 2025]

The number of attempts remaining is 1

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1. The process of separation of a racemic modification into d and l -enantiomers is called

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2. Which of the following is an optically active compound?

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3. How many alcohol(s) with molecular formula C4H10O are chiral in nature?

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4. Halogenation of alkanes is

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5. Most reactive halide towards SN1 reaction is

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6. A Grignard reagent may be made by reacting magnesium with

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7. Which of the following is liquid at room temperature (b.p. is shown against it)?

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8. Which of the following reacts with NaOH to give an alcohol?

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9. Ethylene dichloride can be prepared by adding HCl to

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10. Aldehydes can be oxidised by :

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11. Bithional is an example of

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12. Which one is most reactive towards SN1 reaction?

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13. Which one of the following halogen compounds is difficult to be hydrolysed by SN1 mechanism?

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14. The catalyst used in the preparation of an alkyl chloride by the action of dry HCl on an alcohol is

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15. An organic amino compound reacts with aqueous nitrous acid at low temperature to produce an oily nitrosoamine. The compound is

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16. Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statements is not true:

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17. 2-Bromopentane is heated with potassium ethoxide in ethanol. The major product obtained is

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18. Bithional is added to soap as an additive to function as a/an

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19. Phosgene is a common name for

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20. SN2 mechanism proceeds through intervention of

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Chemistry Quiz Competition Details for 2025:

  • Registration: No Registration required. Only attempt Participate without any charges! Embrace this chance to pit your chemistry skills against international competitors.
  • Competition Time: 24 x 7 but once every month
  • Results Announcement: 2nd day of next month
 

Swati Kumari

I am an experienced chemistry teacher and content developer specializing in chemistry and science subjects at QuizRanker. With a Master’s degree in Chemistry from Delhi University, I bring a deep understanding of the subject and a passion for teaching. In addition to creating engaging educational content, I offer personalized one-on-one live tutoring sessions for students. I am available to support learners in 11th and 12th grade chemistry, as well as science subjects for students up to 10th grade.