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A sum of money under compound interest doubles itself in 4 years. In how many years will it become 16 times itself?

Option: 1
12 years

Option: 2
16 years

Option: 3
8 years

Option: 4
None of these

16 years

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Debjani Behera

A certain loan amounts, under compound interest, compounded annually earns an interest of Rs.1980 in the second year and Rs.2178 in the third year. How much interest did it earn in the first year?
Option: 1
Rs.1600

Option: 2
Rs.1800

Option: 3
Rs.1900

Option: 4
None of these

xyz pqr abc year tt

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wgqefiqyg

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Spin only magnetic moment of an octahedral complex of $\mathrm{Fe}^{2+}$ in the presence of a strong field ligand in BM is :
Option: 1 4.89
Option: 2 4.89
Option: 3 4.89
Option: 4 4.89
Option: 5 2.82
Option: 6 2.82
Option: 7 2.82
Option: 8 2.82
Option: 9 0
Option: 10 0
Option: 11 0
Option: 12 0
Option: 13 3.46
Option: 14 3.46
Option: 15 3.46
Option: 16 3.46

Electionic configuration of $\mathrm{Fe}^{2+}=[\mathrm{Ar}] 3 \mathrm{~d}^{6}$

In the preserce of a strong field ligand, pairing will take place

Thus there are no unpaired electrons and the spin only magnetic moment is zero.

Hence, the correct answer is option (3)

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Posted by

sudhir.kumar

The number of geometrical isomers found in the metal complexes $\mathrm{\left[ PtCl _{2}\left( NH _{3}\right)_{2}\right],\left[ Ni ( CO )_{4}\right], \left[ Ru \left( H _{2} O \right)_{3} Cl _{3}\right] \text { and }\left[ CoCl _{2}\left( NH _{3}\right)_{4}\right]^{+}}$ respectively, are :
Option: 1 $1,1,1,1$
Option: 2 $1,1,1,1$
Option: 3 $1,1,1,1$
Option: 4 $1,1,1,1$
Option: 5 $2,1,2,2$
Option: 6 $2,1,2,2$
Option: 7 $2,1,2,2$
Option: 8 $2,1,2,2$
Option: 9 $2,0,2,2$
Option: 10 $2,0,2,2$
Option: 11 $2,0,2,2$
Option: 12 $2,0,2,2$
Option: 13 $2,1,2,1$
Option: 14 $2,1,2,1$
Option: 15 $2,1,2,1$
Option: 16 $2,1,2,1$

The complexes along with their geometrical isomers are given below:

(a) $\left [ \text { Pt} \left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2} \right ]$ : Square planar $\text{Ma}_{2}\text{b}_{2}$

(b) $\text{Ni}(\text{CO})_{4}$ : tetrahedral complex.

Does not show Geometrical isomerism.

(c) $\left[\mathrm{Ru}\left(\mathrm{H}_{2} \mathrm{O}\right)_{3} \mathrm{Cl}_{3}\right]$ : Octahedral $\text {Ma}_{3}\text{b}_{3}$

(d) $\left[\mathrm{Co} \mathrm{Cl}_{2}\left(\mathrm{NH}_{3}\right) _{4}\right]^{+}$ : Octahedral $\text{Ma}_{4}\text{b}_{2}$

Hence, the correct answer is option (3)

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sudhir.kumar

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The type of hybridisation and magnetic property of the complex $\left[\mathrm{MnCl}_{6}\right]^{3-}$ , respectively, are :
Option: 1 $\mathrm{sp ^{3} d ^{2} \text { and diamagnetic }}$
Option: 2 $\mathrm{sp ^{3} d ^{2} \text { and diamagnetic }}$
Option: 3 $\mathrm{sp ^{3} d ^{2} \text { and diamagnetic }}$
Option: 4 $\mathrm{sp ^{3} d ^{2} \text { and diamagnetic }}$
Option: 5 $\mathrm{d ^{2} sp ^{3} \text { and diamagnetic }}$
Option: 6 $\mathrm{d ^{2} sp ^{3} \text { and diamagnetic }}$
Option: 7 $\mathrm{d ^{2} sp ^{3} \text { and diamagnetic }}$
Option: 8 $\mathrm{d ^{2} sp ^{3} \text { and diamagnetic }}$
Option: 9 $\mathrm{d ^{2} sp ^{3} \text { and paramagnetic }}$
Option: 10 $\mathrm{d ^{2} sp ^{3} \text { and paramagnetic }}$
Option: 11 $\mathrm{d ^{2} sp ^{3} \text { and paramagnetic }}$
Option: 12 $\mathrm{d ^{2} sp ^{3} \text { and paramagnetic }}$
Option: 13 $\mathrm{sp ^{3} d ^{2} \text { and paramagnetic }}$
Option: 14 $\mathrm{sp ^{3} d ^{2} \text { and paramagnetic }}$
Option: 15 $\mathrm{sp ^{3} d ^{2} \text { and paramagnetic }}$
Option: 16 $\mathrm{sp ^{3} d ^{2} \text { and paramagnetic }}$

The complex $\left [ \text{MnCl}_{6} \right ]^{3-}$ contains $\mathrm{Mn^{3+}}$ ion in a weak ligand field. The electronic arrangement is shown below :

$\mathrm{M n^{3+}:\left[Ar\right] 4s^{0} 3 d^{4}}$

Thus, the complex is $\text{sp}^{3} \text {d}^{2}$ hybridised with a paramagnetic nature.

Hence, the correct arswer is option (4)

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sudhir.kumar

The overall stability constant of the complex ion $\mathrm{\left [ Cu\left ( NH_{3} \right )_{4} \right ]^{2+}}$ is $2.1\times 10^{1 3}$ . The overall dissociation constant is $y\times 10^{-14}$ . Then $y$ is ___________(Nearest integer)

Given,

Stability constant $= 2. 1\times 10^{13}$

$\begin{aligned} \mathrm{\therefore Dissociation \; constant}&= \mathrm{\frac{1}{stability\, constant}} \\&=\frac{1}{2.1 \times 10^{13}} \\&= 4.76 \times 10^{-14} \\&\simeq 5\times 10^{-14} \end{aligned}$

Hence, the answer is 5

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Posted by

sudhir.kumar

NEET 2024 Most scoring concepts

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Arrange the following Cobalt complexes in the order of incresing Crystal Field Stabilization Energy (CFSE) value. Complexes :

$\mathrm{\underset{\textbf{A}}{\left [ CoF_{6} \right ]^{3-}},\underset{\textbf{B}}{\left [ Co\left ( H_{2}O \right )_{6} \right ]^{2+}},\underset{\textbf{C}}{\left [ Co\left ( NH_{3} \right )_{6} \right ]^{3+}}\: and\: \ \underset{\textbf{D}}{\left [ Co\left ( en \right )_{3} \right ]^{3+}}}$

Choose the correct option :
Option: 1 $\mathrm{B< C< D< A}$
Option: 2 $\mathrm{B< A< C< D}$
Option: 3 $\mathrm{A< B< C< D}$
Option: 4 $\mathrm{C< D< B< A}$

As we have learnt ,

The CFSE depends upon the nature of ligands if the metal cation is the same.

Also, cations having greater positive charge have a greater CFSE.

Thus, the given complexes can be arranged in order of their CFSE as

$\mathrm{\underset{\textbf{D}}{\left [ Co\left ( en \right )_{3} \right ]^{3+}}> \underset{\textbf{C}}{\left [ Co\left ( NH_{3} \right ) _{6} \right ]^{3+}}>\underset{\textbf{A}} {\left [ CoF_{6} \right ]^{3-}}> \underset{\textbf{B}}{\left [ Co\left ( H_{2}O \right )_{6} \right ]^{2+}}}$

Hence, the correct answer is option (1)

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sudhir.kumar

3 moles of metal complex with formula $\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{3}$ gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of CO in the complex is_______.
(Round off to the nearest integer)

The given complex is $\left[\mathrm{Co}(\mathrm{en})_{3}\right] \mathrm{Cl}_{3}$ and its primary valency is 3 and secondary valency is 6 .

Hence, the answer is 6.

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sudhir.kumar

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This is an abiotic resource a option grass B option forest C option mineral MCQ?

The correct option is C) Mineral.

Mineral is an Abiotic resource as it is not derived from living organisms.

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Deependra Verma

Ankita and pooja are good friends but Poojas parent do not like girls going out without elders.discuss

Ankita and Pooja are good friends and wants to hang out together sometimes. However, Pooja's parents do not like girls going out without elders or adult supervision. According to me, they are right as the children are very young school going children. They should meet each other only at their homes and nearby places such as parks, eating joints only in presence of their parents. They should listen to the advice of their elders and follow their guidelines.

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Get Answers to all your Questions

All Questions

A sum of money under compound interest doubles itself in 4 years. In how many years will it become 16 times itself? Option: 1 12 yearsOption: 2 16 yearsOption: 3 8 yearsOption: 4 None of these

Posted by

Debjani Behera

A certain loan amounts, under compound interest, compounded annually earns an interest of Rs.1980 in the second year and Rs.2178 in the third year. How much interest did it earn in the first year?Option: 1 Rs.1600Option: 2 Rs.1800Option: 3 Rs.1900Option: 4 None of these

Posted by

wgqefiqyg

Crack CUET with india's "Best Teachers"

Posted by

sudhir.kumar

The number of geometrical isomers found in the metal complexes respectively, are :Option: 1 Option: 2 Option: 3 Option: 4 Option: 5 Option: 6 Option: 7 Option: 8 Option: 9 Option: 10 Option: 11 Option: 12 Option: 13 Option: 14 Option: 15 Option: 16

Posted by

sudhir.kumar

JEE Main high-scoring chapters and topics

The type of hybridisation and magnetic property of the complex , respectively, are :Option: 1 Option: 2 Option: 3 Option: 4 Option: 5 Option: 6 Option: 7 Option: 8 Option: 9 Option: 10 Option: 11 Option: 12 Option: 13 Option: 14 Option: 15 Option: 16

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A sum of money under compound interest doubles itself in 4 years. In how many years will it become 16 times itself?

Option: 1
12 years

Option: 2
16 years

Option: 3
8 years

Option: 4
None of these

A certain loan amounts, under compound interest, compounded annually earns an interest of Rs.1980 in the second year and Rs.2178 in the third year. How much interest did it earn in the first year?
Option: 1
Rs.1600

Option: 2
Rs.1800

Option: 3
Rs.1900

Option: 4
None of these

The overall stability constant of the complex ion $\mathrm{\left [ Cu\left ( NH_{3} \right )_{4} \right ]^{2+}}$ is $2.1\times 10^{1 3}$ . The overall dissociation constant is $y\times 10^{-14}$ . Then $y$ is ___________(Nearest integer)

3 moles of metal complex with formula $\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{3}$ gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of CO in the complex is_______.
(Round off to the nearest integer)