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Calamine and Malachite, respectively, ar...

Calamine and Malachite, respectively, are the ores of

A

Nickel and Aluminium

B

Copper and Iron

C

Zinc and Copper

D

Aluminium and Zinc

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JEE MAINS PREVIOUS YEAR-JEE MAINS 2021-Chemistry Section A
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  2. Match List - I with List - II. Choose the most appropriate answ...

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  3. Monomer units of Dacron polymer are :

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  4. The oxide without nitrogen-nitrogen bond is:

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  5. The stereoisomers that are formed by electrophilic addition of bromine...

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  6. In the given chemical reaction, colors of the Fe^(2+) and Fe^(3+) ions...

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  7. Which one of the following given graphs represents the variation of ra...

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  8. Given below are two statements : Statement I : The nucleophilic addi...

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  9. Identify the element for which electronic con.figuration in +3 oxidati...

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  10. Which one of the following compounds is aromatic in nature ?

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  11. Which one of the following gives the most stable Diazonium salt ?

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  12. The potassium ferrocyanide solution gives a prussian blue colour when ...

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  13. In the following sequence of reactions a compound A, (molecular formul...

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  14. Number of paramagnetic oxides among the following given oxides is . ...

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  15. Water sample is called cleanest on the basis of which one of the BOD v...

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  16. Hydrogen peroxide reacts with iodine in basic medium to give:

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  17. Experimentally reducing a functional group cannot be done by which one...

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  18. The Crystal Field Stabilization Energy (CFSE) and magnetic moment (spi...

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  19. In the following sequence of reactions, C3H6 overset(H^(+) //H2O) to...

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  20. Identify A in the following reaction.

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