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CBSE Class 12th chemistry questions paper

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#1. Write JUPAC name of the complex : [Cr ( H₂ O ) ₅ Cl ] Cl₂

Pentaaquachloridochromium ( lll ) chloride.

Pentaamminethiocyanatocobalt ( lll ) chloride.

Diamminebis ( ethane -1,2-diammine ) cobalt ( lll ) chloride.

Pentaamminechloridocobalt ( lll ) Chloride.

#2. Write JUPAC name of the complex : [ Co ( NH₃)₅ SCN] Cl₂

Pentaamminethiocyanatocobalt ( lll ) chloride.

Diamminebis ( ethane -1,2-diammine ) cobalt ( lll ) chloride.

Pentaaquachloridochromium ( lll ) chloride.

Pentaamminechloridocobalt ( lll ) Chloride.

#3. Write the formula of copper hexacyano-ferrate(ll).

Cu₂ [ fe ( CN )₆ ]

[ CoF₄ ]³⁻

[ ptCl ( NH₃ )₅ ] Cl₃ .

[ Cr ( H₂ O )₅ SO₄ ] Br.

#4. Describe briefly the following : isomerism shown by [ Cr ( H₂O )₅ ( NCS ) ]²⁺

Linkage isomerism.

Ionisation isomer

Diamminebis isomer

Sodium isomer

#5. Write an ionisation isomer of [ Cr ( H₂ O )₅ Br ] SO₄ .

Ionisation isomer of [ Cr ( H₂ O )₅ Br ] SO₄ is [ Cr ( H₂ O )₅ SO₄ ] Br.

Ionisation isomer of [ Au ( H₂ O )₅ Br ] SO₄ is [ Cr ( H₆ O )₂ SO₂ ] Br.

lonisation isomer of [ fe ( H₂ O )₇ Br ] SO₄

lonisation isomer of [ fe ( H₂ O )₇ Br ] SO₄ is [ Au ( H₂ O )₅ Br ] SO₄

#6. Write the JUPAC name of [ CO (en )₂ (NH₃)₂ ] Cl₃ .

Diamminebis ( ethane- 1, 2-diammine ) cobalt ( lll ) chloride.

Pentaaquachloridochromium ( lll ) chloride.

Pentaamminechloridocobalt ( lll ) Chloride.

Pentaamminethiocyanatocobalt ( lll ) chloride.

#7. Write the JUPAC name of [ Co ( NH₃)₅ Cl ] Cl₂ .

Pentaamminechloridocobalt ( lll ) chloride.

Diamminetetrachloridoplatinum(II) ion.

Sodium tetrafluoridodihydroxochromate (III).

Ammonium hexanitrito-o-cobaltate(III).

#8. What is the coordination number of central metal ion in [ Fe ( C₂ O₄ )₃ ]³⁻ .

Coordination number is 6 ( one oxalate is linked by two bond ) .

Coordination number is 4 ( one oxalate is linked by two bond ) .

Coordination number is 8 ( one oxalate is linked by two bond ) .

Coordination number is 9 ( one oxalate is linked by two bond ) .

#9. Write JUPAC name for [ pt ( NH₃ )₂ Cl₄ ] ²⁻.

Diammineterachloridoplatinum ( ll ) ion.

Diammineterachloridosilver ( l ) ion

Sodium tetrafluriododihydroxochromate ( lll )

Ammonium hexanitrito-o-cobaltate ( lll )

#10. Write JUPAC name for [ Ag ( NH₃ )₂ ] NO₃ .

Diamminetetrachloridoplatinum ( ll ) ion

Diamminesilver ( l ) nitrate

Pentaamminethiocyanatocobalt ( lll ) chloride.

Pentaaquachloridochromium ( lll ) Chloride

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Results

#1. Write JUPAC name of the complex : [Cr ( H₂ O ) ₅ Cl ] Cl₂

#2. Write JUPAC name of the complex : [ Co ( NH₃)₅ SCN] Cl₂

#3. Write the formula of copper hexacyano-ferrate(ll).

#4. Describe briefly the following : isomerism shown by [ Cr ( H₂O )₅ ( NCS ) ]²⁺

#5. Write an ionisation isomer of [ Cr ( H₂ O )₅ Br ] SO₄ .

#6. Write the JUPAC name of [ CO (en )₂ (NH₃)₂ ] Cl₃ .

#7. Write the JUPAC name of [ Co ( NH₃)₅ Cl ] Cl₂ .

#8. What is the coordination number of central metal ion in [ Fe ( C₂ O₄ )₃ ]³⁻ .

#9. Write JUPAC name for [ pt ( NH₃ )₂ Cl₄ ] ²⁻.

#10. Write JUPAC name for [ Ag ( NH₃ )₂ ] NO₃ .

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