JEE Main 2020 (Online) 7th January Morning Slot | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

1

JEE Main 2020 (Online) 7th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

Oxidation number of potassium in K₂O. K₂O₂ and KO₂ respectively is :

A

+1, +2 and + 4

B

+1, +1 and + 1

C

+2, +1 and $$ + {1 \over 2}$$

D

+1, +4, and +2

2

JEE Main 2020 (Online) 7th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

The atomic radius of Ag is closed to :

A

Au

B

Cu

C

Hg

D

Ni

3

JEE Main 2020 (Online) 7th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

A solution of m-chloronailimne, m-chlorophenol and m-chlorobenzoic acid in ethyal acetate was extracted initially with a saturated solution of NaHCO₃ to give fraction A. The left over organic phase was extracted with dilute NaoH solution tio give fraction B. The final organiic layer was labelled as fraction C. Fractions A,B and C, contain respectively :

A

m-chlorobenzoic acid, m-chloroaniline and m-chlorophenol.

B

m-chlorobenzoic acid, m-chlorophenol and m-chloroaniline.

C

m-chlorophenol, m-chlorobenzoic acid and m-chloronailine.

D

m-chloroaniline m-chlorobenzoic acid and m-chlorophenol.

4

JEE Main 2020 (Online) 7th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

The IUPAC name of complex [Pt(NH₃)₂Cl(NH₂CH₃)]Cl is:

A

Diamminechlorido (methanamine) platinum(II)chloride.

B

Biasmmine (methanamine)chlorido platinum(II)chloride.

C

Diamminechlorido (amminomethane) platinum(II) chloride.

D

Diammine (methanamine) chlorido platinum(II)Chloride.

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