JEE Main 2018 (Online) 15th April Evening Slot | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

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1

JEE Main 2018 (Online) 15th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

In the leaching method, bauxite ore is digested with a concentrated solution of NaOH that produces 'X'. When CO₂ gas is passed through the aqueous solution of 'X', a hydrated compound 'Y' is precipitated. 'X' and 'Y' respectively are :

A

NaAlO₂ and Al₂(CO₃)₃.x H₂O

B

A(OH)₃ and Al₂O₃.x H₂O

C

Na[Al(OH)₄] and Al₂O₃.x H₂O

D

Na[Al(OH)₄] and Al₂(CO₃)₃.x H₂O

2

JEE Main 2018 (Online) 15th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

The total number of possible isomers for square-planar [Pt(Cl)(NO₂)(NO₃)(SCN)]^2- is :

A

8

B

12

C

16

D

24

3

JEE Main 2018 (Online) 15th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

Two compounds I and II are eluted by column chromatography (adsorption of I > II). Which one of following is a correct statement ?

A

I moves faster and has higher R_f value than II

B

II movesfaster and has higher R_f value than I

C

I moves slower and has higher R_f value than II

D

II moves slower and has higher R_f value than I

4

JEE Main 2018 (Online) 15th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Which of the following statements is not true ?

A

Step growth polymerisation requires a bifunctional monomer.

B

Nylon 6 is an example of step-growth polymerisation.

C

Chain growth polymerisation includes both homopolymerisation and copylymerisation.

D

Chain growth polymerisation involves homopolymerisation only.

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