Day 412: JEE Mains Chemistry

1. A.
   A-III, B-II, C-IV, D-I
2. B.
   A-II, B-III, C-I, D-IV
3. C.
   A-I, B-II, C-III, D-IV
4. D.
   A-II, B-I, C-III, D-IV

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1. A.
   Among the isotopes of carbon, $\ ^{13}C$ is a radioactive isotope.
2. B.
   Carbon exhibits negative oxidation states along with +4 and +2 .
3. C.
   Carbon cannot exceed its covalency more than four.
4. D.
   ${CO}_{2}$ is the most acidic oxide among the dioxides of group of 14 elements.

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1. A.
   $\left\lbrack Ni(CN)_{4} \right\rbrack^{2 -}$
2. B.
   $\left\lbrack Ni\left( {NH}_{3} \right)_{2}{Cl}_{2} \right\rbrack$
3. C.
   $\left\lbrack Fe\left( {NH}_{3} \right)_{4}{Cl}_{2} \right\rbrack^{+}$
4. D.
   $\left\lbrack Co\left( {NH}_{3} \right)_{4}{Cl}_{2} \right\rbrack^{+}$

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1. A.
   The concentration of ${CH}_{3}COOH$ in the original mixture is 0.005 M
2. B.
   The concentration of HCl in the original mixture is 0.005 M
3. C.
   ${CH}_{3}COOH$ is neutralised first followed by neutralisation of HCl
4. D.
   Point ' C ' indicates the complete neutralisation HCl

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1. A.
2. B.
3. C.
4. D.

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