12th Class Chemistry Quiz Ranking Competition

12th Class Chemistry Quiz Ranking Competition 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 [May 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 among MeX, RCH2X, R2CHX and R3CX is most reactive towards SN2 reaction?

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3. How many isomers of C5H11OH will be primary alcohols ?

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4. Which of the following statements is incorrect regarding glucose?

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5. Which of the following alkyl halides is used as a methylating agent?

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6. Acetaldehyde reacts with

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7. If formaldehyde and KOH are heated, then we get

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8. Which is highly soluble in water?

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9. IUPAC name of ethyl isopropyl ketone is

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10. C – X bond is strongest in

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

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12. Ethyl alcohol is industrially prepared from ethylene by

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13. In the preparation of chlorobenzene from aniline, the most suitable reagent is

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14. 5 Gammexane is

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15. Aldehydes can be oxidised by :

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

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17. B.H.C. is used as an

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18. Chloroform and conc. HNO3 react to produce

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19. Chlorobenzene is prepared commercially by

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20. Among the following, the most reactive towards alcoholic KOH is :

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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
 

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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.