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Q 1. Heating of Ag with dil. {tex}\mathrm{HNO_{3}}{/tex} gives
{tex} \mathrm { NO } {/tex}
{tex} \mathrm { NO } _ { 2 } {/tex}
{tex} \mathrm { N } _ { 2 } \mathrm { O } {/tex}
{tex} \mathrm { N } _ { 2 } \mathrm { O } _ { 3 } {/tex}
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Q 2. When excess of {tex} \mathrm { SnCl } _ { 2 } {/tex} , is added to {tex} \mathrm { HgCl } _ { 2 } , {/tex} the substance formed is -
{tex} \mathrm { Hg } _ { 2 } \mathrm { Cl } _ { 2 } {/tex}
{tex}\mathrm{Sn}{/tex}
{tex} \mathrm { H } _ { \mathrm { g } } {/tex}
{tex} \mathrm { Cl } _ { 2 } {/tex}
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Q 3. Which of the following statements concerning transition elements, is not true?
They are all metals.
They easily form complexes.
Compounds containing their ions are coloured.
They show multiple oxidation states always differing by two units.
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Q 4. Which of the following compounds is not colored yellow?
{tex} \left( \mathrm { NH } _ { 4 } \right) _ { 3 } \left[ \mathrm { As } \left( \mathrm { Mo } _ { 3 } \mathrm { O } _ { 10 } \right) _ { 4 } \right] {/tex}
{tex} \mathrm { BaCrO } _ { 4 } {/tex}
{tex} \mathrm { Zn } _ { 2 } \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] {/tex}
{tex} \mathrm { K } _ { 3 } \left[ \mathrm { Co } \left( \mathrm { NO } _ { 2 } \right) _ { 6 } \right] {/tex}
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Q 5. The number of geometric isomers that can exist for square planar complex
{tex} [Pt \ (Cl) \ (py) \ (NH_{3}) \ (NH_{2}OH)]^{+} {/tex}
(py=pyridine):
4
6
2
3
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Q 6. The correct order of magnetic moments (spin only values in B.M.) anong is
{tex} (Atomic \ nos. :Mn=25, Fe=26,Co=27) {/tex}
{tex} \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] ^ { 4 -} > \left[ \mathrm { MnCl } _ { 4 } \right] ^ { 2 - } > \left[ \mathrm { CoCl } _ { 4 } \right] ^ { 2 - } {/tex}
{tex} \left[ \mathrm { MnCl } _ { 4 } \right] ^ { 2 - } > \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] ^ { 4 - } > \left[ \mathrm { CoCl } _ { 4 } \right] ^ { 2 - } {/tex}
{tex} \left[ \mathrm { MnCl } _ { 4 } \right] ^ { 2 - } > \left[ \mathrm { CoCl } _ { 4 } \right] ^ { 2 - } > \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] ^ { 4 - } {/tex}
{tex} \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] ^ { 4 - } > \left[ \mathrm { CoCl } _ { 4 } \right] ^ { 2 - } > \left[ \mathrm { MnCl } _ { 4 } \right] ^ { 2 - } {/tex}
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Q 7. The oxidation state of chromium in the final product formed by the reaction between {tex} \mathrm { Kl } {/tex} and acidified potassium dichromate solution is:
{tex} + 3 {/tex}
{tex} + 2 {/tex}
{tex} + 6 {/tex}
{tex} + 4 {/tex}
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Q 8. Which one of the following has an optical isomer?
{tex} \left[ \mathrm { Zn } ( \mathrm { en } ) \left( \mathrm { NH } _ { 3 } \right) _ { 2 } \right] ^ { 2 + } {/tex}
{tex} \left[ \mathrm { Co } ( \mathrm { en } ) _ { 3 } \right] ^ { 3 + } {/tex}
{tex} \left[ \mathrm { Co } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 4 } ( \mathrm { en } ) \right] ^ { 3 + } {/tex}
{tex} \left[ \mathrm { Zn } ( \mathrm { en } ) _ { 2 } \right] ^ { 2 + } {/tex}
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Q 9. The octahedral complex of a metal ion {tex} \mathrm { M } ^ { 3 + } {/tex} with four monodentate ligands {tex} L _ { 1 } , L _ { 2 } , L _ { 3 } {/tex} and {tex} L _ { 4 } {/tex} absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is:
{tex} L _ { 4 } < L _ { 3 } < L _ { 2 } < L _ { 1 } {/tex}
{tex} L _ { 1 } < L _ { 3 } < L _ { 2 } < L _ { 4 } {/tex}
{tex} L _ { 3 } < L _ { 2 } < L _ { 4 } < L _ { 1 } {/tex}
{tex} L _ { 1 } < L _ { 2 } < L _ { 4 } < L _ { 3 } {/tex}
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Q 10. Which one of the following complexes shows optical isomerism?
{tex} ( \mathrm { en } = \text { ethylenediamine } ) {/tex}
{tex} \operatorname { trans } \left[ \mathrm { Co } ( \mathrm { en } ) _ { 2 } \mathrm { Cl } _ { 2 } \right] \mathrm { Cl } {/tex}
{tex} \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 4 } \mathrm { Cl } _ { 2 } \right] \mathrm { Cl } {/tex}
{tex} \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 3 } \mathrm { Cl } _ { 3 } \right] {/tex}
{tex} \operatorname { cis } \left[ \mathrm { Co } ( \mathrm { en } ) _ { 2 } \mathrm { Cl } _ { 2 } \right] \mathrm { Cl } {/tex}
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Q 11. The color of {tex}\mathrm{ KMnO_{4} }{/tex} is due to:
{tex} \mathrm { L } \rightarrow \mathrm { M } {/tex} charge transfer transition
{tex} \sigma - \sigma ^ { * } {/tex} transition
{tex} \mathrm { M } \rightarrow {/tex} L charge transfer transition
{tex} \mathrm { d } - \mathrm { d } {/tex} transition
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Q 12. Aluminium chloride exists as dimer, {tex} \mathrm { Al } _ { 2 } {/tex}{tex} \mathrm { Cl } _ { 6 } {/tex} in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives
{tex} \mathrm { Al } ^ { 3 + } + 3 \mathrm { Cl } ^ { - } {/tex}
{tex} \left[ \mathrm { Al } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 3 + } + 3 \mathrm { Cl } ^ { - } {/tex}
{tex} \left[ \mathrm { Al } ( \mathrm { OH } ) _ { 6 } \right] ^ { 3 - } + 3 \mathrm { HCl } {/tex}
{tex} \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } + 6 \mathrm { HCl } {/tex}
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Q 13. The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey powder. This transformation is related to
an interaction with nitrogen of the air at very low temperatures
a change in the crystalline structure of tin
a change in the partial pressure of oxygen in the air
an interaction with water vapour contained in the humid air.
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Q 14. The most stable ion is
{tex} \left[ \mathrm { Fe } \left( \mathrm { OH } _ { 3 } \right] ^ { 3- } \right. {/tex}
{tex} \left[ \mathrm { Fe } ( \mathrm { Cl } ) _ { 6 } \right] ^ { 3-} {/tex}
{tex} \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] ^ { 3- } {/tex}
{tex} \left[ \mathrm { Fe } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 3 + } {/tex}
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Q 15. Knowing that the chemistry of lanthanoids(Ln) is dominated by its {tex} + 3 {/tex} oxidation state, which of the following statements is incorrect?
The ionic size of Ln (III) decrease in general with increasing atomic number.
Ln (III) compounds are generally colourless.
Ln (III) hydroxide are mainly basic in character.
Because of the large size of the Ln (III) ions the bonding in its compounds is predominantly ionic in character.
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Q 16. Among the properties (a) reducing (b) oxidising (c) complexing, the set of properties shown by {tex} \mathrm { CN } ^ { - } {/tex} ion towards metal species is
{tex} c,a {/tex}
{tex} b , c {/tex}
{tex} a , b {/tex}
{tex} a , b , c {/tex}
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Q 17. {tex} \text { The outer electron configuration of Gd (Atomic No..: } 64 ) {/tex} is:
{tex}4 \mathrm { f } ^ { 3 } 5 \mathrm { d } ^ { 5 } 6 \mathrm { s } ^ { 2 } {/tex}
{tex} 4f ^ { 8 } 5 d ^ { 0 } 6 s ^ { 2 } {/tex}
4{tex} f ^ { 4 } 5 d ^ { 4 } 6 s ^ { 2 } {/tex}
{tex}4 \mathrm { f } ^ { 7 } 5 \mathrm { d } ^ { 1 } 6 \mathrm { s } ^ { 2 } {/tex}
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Q 18. Iron exhibits {tex} + 2 {/tex} and {tex} + 3 {/tex} oxidation states. Which of the following statements about iron is incorrect?
Ferrous oxide is more basic in nature than the ferric oxide.
Ferrous compounds are relatively more ionic than the corresponding ferric compounds.
Ferrous compounds are less volatile than the corresponding ferric compounds.
Ferrous compounds are more easily hydrolysed than the corresponding ferric compounds.
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Q 19. {tex} \mathrm { CH } _ { 3 } - \mathrm { Mg } - \mathrm { Br } {/tex} is an organo metallic compound due to
{tex} \mathrm { Mg } - \mathrm { Br } {/tex} bond
{tex} \mathrm { C } - \mathrm { Mg } {/tex} bond
{tex} \mathrm { C } - \mathrm { Br } {/tex} bond
{tex} \mathrm { C } - \mathrm { H } {/tex} bond
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Q 20. In {tex} \mathrm { Fe } ( \mathrm { CO } ) _ { 5 } , {/tex} the {tex} \mathrm { Fe } - \mathrm { C } {/tex} bond possesses
ionic character
{tex} \sigma {/tex} -character only
{tex} \pi {/tex} -character
both {tex} \sigma {/tex} and {tex} \pi {/tex} characters
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Q 21. The actinoids exhibit more number of oxidation states in general than the lanthanoids. This is because
the {tex}5 \mathrm { f } {/tex} orbitals extend further from the nucleus than the 4 forbitals
the {tex}5 \mathrm { f } {/tex} orbitals are more buried than the 4 forbitals
there is a similarity between {tex}4 \mathrm { f } {/tex} and {tex} 5\mathrm { f } {/tex} orbitals in their angular part of the wave function
the actinoids are more reactive than the lanthanoids.
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Q 22. A reduction in atomic size with increase in atomic number is a characteristic of elements of
high atomic masses
{tex} d - {/tex} block
{tex} f - {/tex} block
radioactive series.
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Q 23. The number and type of bonds between two carbon
atoms in calcium carbide are
one sigma, one pi
one sigma, two pi
two sigma, one pi
two sigma, two pi
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Q 24. In the coordination compound, {tex} K _ { 4 } \left[ \mathrm { Ni } ( \mathrm { CN } ) _ { 4 } \right] , {/tex} the oxidation state of nickel is
{tex}0{/tex}
{tex} + 1 {/tex}
{tex} + 2 {/tex}
{tex} - 1 {/tex}
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Q 25. The magnetic moment (spin only) of {tex} \left[ \mathrm { NiCl } _ { 4 } \right] ^ { 2 - } {/tex} is :
{tex} 1.82\mathrm { BM } {/tex}
{tex} 5.46\mathrm { BM } {/tex}
{tex}2.82 \mathrm { BM } {/tex}
{tex} 1.41\mathrm { BM } {/tex}
