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TEST SERIES (CHEMISTRY FST)

263903 The pair of metal ions which are diamagnetic:

1

{Sc}^{+ 3}, {Cu}^{+ 2}

2

{Sc}^{+ 3}, {Zn}^{+ 2}

3

{Zn}^{+ 2}, {Cu}^{+ 2}

4

{Sc}^{+ 3}, {Ti}^{+ 3}

Explanation:

b
${Sc}^{+ 3}, {Zn}^{+ 2}$

NCERT-XII-101

TEST SERIES (CHEMISTRY FST)

263861 In case of ${sp}^{3} d$ hybridisation, if ratio of longer and shorter o-bonds is $1 : 1$ then how many lone pair's must be present:

1 Zero

2 Oпe

3 Two

4 Three

NCERT-XI-113

TEST SERIES (CHEMISTRY FST)

263895 Spin only magnetic moment is maximum for which of the following ion :

1

{Ti}^{+ 3}

2

{Cr}^{2}

3

{Mn}^{+ 2}

4

{Fe}^{+ 2}

Explanation:

c
$μ \propto$ no. of unpaired electron
${Ti}^{+ 3} = 1$ unpaired electron
${Cr}^{+ 2} = 4$ unpaired electron
$M n^{+ 2} = 5$ uпpaired electron
${Fe}^{+ 2} = 4$ unpaired electron

NCERT-XII-130

TEST SERIES (CHEMISTRY FST)

263896 Correct order of resonance energy for: a. thiophene b. Pyrrole c. Furan

1

c > b > a

2

b > c > a

3

b > a > c

4

a > b > c

NCERT-XI-353

TEST SERIES (CHEMISTRY FST)

263860 Consider the order $N^{- 3} > O^{2} > F^{-} > {Na}^{+}$ the correct statement is:

1 increasing order of Zeff.

2 increasing order of I.E.

3 decreasing order of size

4 increasing order of electron affinity

Explanation:

c
for iscelectronic species ionic radii $\propto \frac{1}{ENC}$

NCERT-XI-87

TEST SERIES (CHEMISTRY FST)

263903 The pair of metal ions which are diamagnetic:

1

{Sc}^{+ 3}, {Cu}^{+ 2}

2

{Sc}^{+ 3}, {Zn}^{+ 2}

3

{Zn}^{+ 2}, {Cu}^{+ 2}

4

{Sc}^{+ 3}, {Ti}^{+ 3}

Explanation:

b
${Sc}^{+ 3}, {Zn}^{+ 2}$

NCERT-XII-101

TEST SERIES (CHEMISTRY FST)

263861 In case of ${sp}^{3} d$ hybridisation, if ratio of longer and shorter o-bonds is $1 : 1$ then how many lone pair's must be present:

1 Zero

2 Oпe

3 Two

4 Three

NCERT-XI-113

TEST SERIES (CHEMISTRY FST)

263895 Spin only magnetic moment is maximum for which of the following ion :

1

{Ti}^{+ 3}

2

{Cr}^{2}

3

{Mn}^{+ 2}

4

{Fe}^{+ 2}

Explanation:

c
$μ \propto$ no. of unpaired electron
${Ti}^{+ 3} = 1$ unpaired electron
${Cr}^{+ 2} = 4$ unpaired electron
$M n^{+ 2} = 5$ uпpaired electron
${Fe}^{+ 2} = 4$ unpaired electron

NCERT-XII-130

TEST SERIES (CHEMISTRY FST)

263896 Correct order of resonance energy for: a. thiophene b. Pyrrole c. Furan

1

c > b > a

2

b > c > a

3

b > a > c

4

a > b > c

NCERT-XI-353

TEST SERIES (CHEMISTRY FST)

263860 Consider the order $N^{- 3} > O^{2} > F^{-} > {Na}^{+}$ the correct statement is:

1 increasing order of Zeff.

2 increasing order of I.E.

3 decreasing order of size

4 increasing order of electron affinity

Explanation:

c
for iscelectronic species ionic radii $\propto \frac{1}{ENC}$

NCERT-XI-87

TEST SERIES (CHEMISTRY FST)

263903 The pair of metal ions which are diamagnetic:

1

{Sc}^{+ 3}, {Cu}^{+ 2}

2

{Sc}^{+ 3}, {Zn}^{+ 2}

3

{Zn}^{+ 2}, {Cu}^{+ 2}

4

{Sc}^{+ 3}, {Ti}^{+ 3}

Explanation:

b
${Sc}^{+ 3}, {Zn}^{+ 2}$

NCERT-XII-101

TEST SERIES (CHEMISTRY FST)

263861 In case of ${sp}^{3} d$ hybridisation, if ratio of longer and shorter o-bonds is $1 : 1$ then how many lone pair's must be present:

1 Zero

2 Oпe

3 Two

4 Three

NCERT-XI-113

TEST SERIES (CHEMISTRY FST)

263895 Spin only magnetic moment is maximum for which of the following ion :

1

{Ti}^{+ 3}

2

{Cr}^{2}

3

{Mn}^{+ 2}

4

{Fe}^{+ 2}

Explanation:

c
$μ \propto$ no. of unpaired electron
${Ti}^{+ 3} = 1$ unpaired electron
${Cr}^{+ 2} = 4$ unpaired electron
$M n^{+ 2} = 5$ uпpaired electron
${Fe}^{+ 2} = 4$ unpaired electron

NCERT-XII-130

TEST SERIES (CHEMISTRY FST)

263896 Correct order of resonance energy for: a. thiophene b. Pyrrole c. Furan

1

c > b > a

2

b > c > a

3

b > a > c

4

a > b > c

NCERT-XI-353

TEST SERIES (CHEMISTRY FST)

263860 Consider the order $N^{- 3} > O^{2} > F^{-} > {Na}^{+}$ the correct statement is:

1 increasing order of Zeff.

2 increasing order of I.E.

3 decreasing order of size

4 increasing order of electron affinity

Explanation:

c
for iscelectronic species ionic radii $\propto \frac{1}{ENC}$

NCERT-XI-87

TEST SERIES (CHEMISTRY FST)

263903 The pair of metal ions which are diamagnetic:

1

{Sc}^{+ 3}, {Cu}^{+ 2}

2

{Sc}^{+ 3}, {Zn}^{+ 2}

3

{Zn}^{+ 2}, {Cu}^{+ 2}

4

{Sc}^{+ 3}, {Ti}^{+ 3}

Explanation:

b
${Sc}^{+ 3}, {Zn}^{+ 2}$

NCERT-XII-101

TEST SERIES (CHEMISTRY FST)

263861 In case of ${sp}^{3} d$ hybridisation, if ratio of longer and shorter o-bonds is $1 : 1$ then how many lone pair's must be present:

1 Zero

2 Oпe

3 Two

4 Three

NCERT-XI-113

TEST SERIES (CHEMISTRY FST)

263895 Spin only magnetic moment is maximum for which of the following ion :

1

{Ti}^{+ 3}

2

{Cr}^{2}

3

{Mn}^{+ 2}

4

{Fe}^{+ 2}

Explanation:

c
$μ \propto$ no. of unpaired electron
${Ti}^{+ 3} = 1$ unpaired electron
${Cr}^{+ 2} = 4$ unpaired electron
$M n^{+ 2} = 5$ uпpaired electron
${Fe}^{+ 2} = 4$ unpaired electron

NCERT-XII-130

TEST SERIES (CHEMISTRY FST)

263896 Correct order of resonance energy for: a. thiophene b. Pyrrole c. Furan

1

c > b > a

2

b > c > a

3

b > a > c

4

a > b > c

NCERT-XI-353

TEST SERIES (CHEMISTRY FST)

263860 Consider the order $N^{- 3} > O^{2} > F^{-} > {Na}^{+}$ the correct statement is:

1 increasing order of Zeff.

2 increasing order of I.E.

3 decreasing order of size

4 increasing order of electron affinity

Explanation:

c
for iscelectronic species ionic radii $\propto \frac{1}{ENC}$

NCERT-XI-87

TEST SERIES (CHEMISTRY FST)

263903 The pair of metal ions which are diamagnetic:

1

{Sc}^{+ 3}, {Cu}^{+ 2}

2

{Sc}^{+ 3}, {Zn}^{+ 2}

3

{Zn}^{+ 2}, {Cu}^{+ 2}

4

{Sc}^{+ 3}, {Ti}^{+ 3}

Explanation:

b
${Sc}^{+ 3}, {Zn}^{+ 2}$

NCERT-XII-101

TEST SERIES (CHEMISTRY FST)

263861 In case of ${sp}^{3} d$ hybridisation, if ratio of longer and shorter o-bonds is $1 : 1$ then how many lone pair's must be present:

1 Zero

2 Oпe

3 Two

4 Three

NCERT-XI-113

TEST SERIES (CHEMISTRY FST)

263895 Spin only magnetic moment is maximum for which of the following ion :

1

{Ti}^{+ 3}

2

{Cr}^{2}

3

{Mn}^{+ 2}

4

{Fe}^{+ 2}

Explanation:

c
$μ \propto$ no. of unpaired electron
${Ti}^{+ 3} = 1$ unpaired electron
${Cr}^{+ 2} = 4$ unpaired electron
$M n^{+ 2} = 5$ uпpaired electron
${Fe}^{+ 2} = 4$ unpaired electron

NCERT-XII-130

TEST SERIES (CHEMISTRY FST)

263896 Correct order of resonance energy for: a. thiophene b. Pyrrole c. Furan

1

c > b > a

2

b > c > a

3

b > a > c

4

a > b > c

NCERT-XI-353

TEST SERIES (CHEMISTRY FST)

263860 Consider the order $N^{- 3} > O^{2} > F^{-} > {Na}^{+}$ the correct statement is:

1 increasing order of Zeff.

2 increasing order of I.E.

3 decreasing order of size

4 increasing order of electron affinity

Explanation:

c
for iscelectronic species ionic radii $\propto \frac{1}{ENC}$

NCERT-XI-87

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