AIEEE 2006 | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

1

AIEEE 2006

MCQ (Single Correct Answer)

+4

-1

The increasing order of stability of the following free radicals is

A

$${({C_6}{H_5})_2}\mathop C\limits^ \bullet H$$ < $${({C_6}{H_5})_3}\mathop C\limits^ \bullet$$ < $${(C{H_3})_3}\mathop C\limits^ \bullet $$ < $${(C{H_3})_2}\mathop C\limits^ \bullet H$$

B

$${(C{H_3})_2}\mathop C\limits^ \bullet H$$ < $${(C{H_3})_3}\mathop C\limits^ \bullet $$ < $${({C_6}{H_5})_2}\mathop C\limits^ \bullet H$$ < $${({C_6}{H_5})_3}\mathop C\limits^ \bullet$$

C

$${(C{H_3})_2}\mathop C\limits^ \bullet H$$ < $${(C{H_3})_3}\mathop C\limits^ \bullet $$ < $${({C_6}{H_5})_3}\mathop C\limits^ \bullet$$ < $${({C_6}{H_5})_2}\mathop C\limits^ \bullet H$$

D

$${({C_6}{H_5})_3}\mathop C\limits^ \bullet$$ < $${({C_6}{H_5})_2}\mathop C\limits^ \bullet H$$ < $${(C{H_3})_3}\mathop C\limits^ \bullet $$ < $${(C{H_3})_2}\mathop C\limits^ \bullet H$$

2

AIEEE 2006

MCQ (Single Correct Answer)

+4

-1

How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca²⁺ ion?

A

Six

B

Three

C

One

D

Two

3

AIEEE 2006

MCQ (Single Correct Answer)

+4

-1

The increasing order of the rate of HCN addition to compounds A – D is
(A) HCHO
(B) CH₃COCH₃
(C) PhCOCH₃
(D) PhCOPh

A

A < B < C < D

B

D < B < C < A

C

D < C < B < A

D

C < D < B < A

4

AIEEE 2006

MCQ (Single Correct Answer)

+4

-1

Nickel (Z = 28) combines with a uninegative monodentate ligand X^– to form a paramagnetic complex [NiX₄]²⁻ . The number of unpaired electron(s) in the nickel and geometry of this complex ion are, respectively

A

one, tetrahedral

B

two, tetrahedral

C

one, square planar

D

two, square planar

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