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The process that involves the removal of...

The process that involves the removal of sulphur from the ores is :

A

Smelting

B

Roasting

C

Refining

D

Leaching

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JEE MAINS PREVIOUS YEAR-JEE MAIN 2021-CHEMISTRY (SECTION A)
  1. Given below are two statements : one is labelled as Assertion A and th...

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  2. The type of pollution that gets increased during the day time and in t...

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  3. The process that involves the removal of sulphur from the ores is :

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  4. In chromotography technique, the purification of compound is independe...

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  5. Which of the following reaction DOES NOT involve Hoffmann bromamide de...

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  6. The products "A" and "B" formed in above reactions are:

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  7. Which of the following is Lindlar catalyst ?

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  8. A group 15 element, which is a metal and forms a hydride with stronges...

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  9. Match List - I with List - Il : Choose the correct answer from ...

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  10. Given below are two statements : Statement 1: Both Ca Cl (2) , 6 H (...

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  11. The product "P" in the above reaction is :

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  12. Match List - I with List - II : Choose the correct answer from t...

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  13. Given below are two statements: Statement 1: H(2)O(2) can act as bot...

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  14. The correct order of conductivity of ions in water is :

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  15. Mesityl oxide is a common name of :

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  16. Which of the following compound CANNOT act as a Lewis base ?

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  17. Reducing smog is a mixture of :

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  18. Hoffmann bromamide degradation of benzamide gives product A, which upo...

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  19. The point of intersection and sudden increase in the slope, in the dia...

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  20. With respect to drug-enzyme interaction, identfy the wrong statement

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