11th Class Chemistry Quiz Ranking Competition

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Class 11th chemistry monthly quiz contest of 2025

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Time: 30 Minutes for 20 Question.

Class 11th Chemistry Quiz Contest [May 2025]

The number of attempts remaining is 1

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1. Freons are not recommended to be used in the refrigerator because they cause

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2. The most electronegative element in the periodic table is———

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3. At 25 degrees celsius and 730 mm pressure, 380 ml of dry oxygen was collected. If the temperature is constant, what volume will oxygen occupy at 760 mm pressure?

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4. A pure substance which contains only one type of atom is called ————–.

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5. The major source of CO pollution is ————

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6. Neutron was discovered by ————–

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7. Which is not a source of pollution?

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8. The gas released in the Bhopal gas tragedy was ———–

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9. Formation of CO and CO2 illustrates the law of ————–.

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10. Reduction never involves:

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11. The adsorption of hydrogen by palladium is called ———–

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12. According to Lewis concept, an acid is:

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13. Ostwald’s dilution law is applicable to:

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14. The significant figures in 0.00051 are ————–.

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15. The smallest particle that can take part in chemical reactions is ————–.

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16. Which of the following is a homogeneous mixture?

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17. A base according to Bronsted concept is a substance which can:

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18. The elements of group 16 are called———-

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19. The nucleus of the atom consists of ————–

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20. Water pollution is less if BOD is

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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.