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پستهای کانال
* 44. Which element is radioactive?
* Answer: (C) $\text{U}$
* 45. All actinoids are
* Answer: (B) Radioactive
* 46. Which lanthanoid is used in lighter flints?
* Answer: (B) $\text{Ce}$
* 47. Mischmetal mainly contains
* Answer: (B) Lanthanoids and $\text{Ce}$
* 48. Which element is used in permanent magnets ($\text{NdFeB}$)?
* Answer: (B) $\text{Nd}$
* 49. The colour of $\text{KMnO}_4$ is
* Answer: (C) Purple
* 50. Which compound is orange in colour?
* Answer: (B) $\text{K}_2\text{Cr}_2\text{O}_7$
Would you like me to continue and solve questions 51 to 80, or do you need help with any of the Short/Long Answer questions in Section-B?
| 2 | Here are the step-by-step solutions for questions 1 to 50 from the Class-XII Chemistry Examination paper:
## Section-A: Objective Type Questions
* 1. Which of the following is a coordination compound?
* Answer: (C) $\text{[Fe(CN)}_6\text{]}^{4-}$
* 2. The central metal atom in $\text{[Co(NH}_3\text{)}_6\text{]Cl}_3$ is
* Answer: (C) Co
* 3. $\text{NH}_3$ acts as
* Answer: (B) Ligand
* 4. $\text{CN}^-$ is an example of
* Answer: (D) Ambidentate ligand
* 5. The coordination number of $\text{Co}$ in $\text{[Co(NH}_3\text{)}_6\text{]}^{3+}$ is
* Answer: (C) 6
* 6. The oxidation state of $\text{Fe}$ in $\text{[Fe(CN)}_6\text{]}^{4-}$ is
* Answer: (B) +2
* 7. Which ligand is ambidentate?
* Answer: (C) $\text{NO}_2^-$
* 8. Which of the following is a chelating ligand?
* Answer: (C) $\text{EDTA}^{4-}$
* 9. The IUPAC name of $\text{[Cu(NH}_3\text{)}_4\text{]SO}_4$ is
* Answer: (B) Tetra-amminecopper (II) sulphate
* 10. Which of the following shows geometrical isomerism?
* Answer: (B) $\text{[Pt(NH}_3\text{)}_2\text{Cl}_2\text{]}$
* 11. Cisplatin is used in
* Answer: (B) Cancer treatment
* 12. Which of the following is a strong field ligand?
* Answer: (D) $\text{CN}^-$
* 13. Which ligand causes maximum crystal field splitting?
* Answer: (C) $\text{CN}^-$
* 14. High spin complexes are generally formed by
* Answer: (B) Weak field ligands
* 15. Which of the following is an inner orbital complex?
* Answer: (B) $\text{[Fe(CN)}_6\text{]}^{4-}$
* 16. The colour of coordination compounds is mainly due to
* Answer: (C) d-d electronic transitions
* 17. Which complex is diamagnetic?
* Answer: (C) $\text{[Fe(CN)}_6\text{]}^{4-}$
* 18. The coordination number of $\text{EDTA}$ in metal complexes is
* Answer: (D) 6
* 19. Which metal ion has $d^{10}$ configuration?
* Answer: (C) $\text{Zn}^{2+}$
* 20. Which complex has coordination number 4?
* Answer: (B) $\text{[Ni(CO)}_4\text{]}$
* 21. The general electronic configuration of d-block elements is
* Answer: (B) $\text{(n-1)d}^{1-10} \text{ns}^{1-2}$
* 22. Which series is called the first transition series?
* Answer: (B) $\text{Sc}$ to $\text{Zn}$
* 23. Transition elements are characterized by
* Answer: (B) Partially filled d-orbitals
* 24. Which element is not a transition element?
* Answer: (C) $\text{Zn}$
* 25. Which transition metal shows the highest number of oxidation states?
* Answer: (C) $\text{Mn}$
* 26. The oxidation state of $\text{Mn}$ in $\text{KMnO}_4$ is
* Answer: (D) +7
* 27. The colour of transition metal ions is mainly due to
* Answer: (B) d-d electronic transition
* 28. Transition metals are generally
* Answer: (B) Hard and dense
* 29. Which transition metal is used in stainless steel?
* Answer: (B) $\text{Cr}$
* 30. Which metal is used in galvanization?
* Answer: (C) $\text{Zn}$
* 31. The magnetic property of transition elements is due to
* Answer: (B) Unpaired electrons
* 32. Which ion is colourless?
* Answer: (C) $\text{Sc}^{3+}$
* 33. Which transition element is used as a catalyst in the Haber process?
* Answer: (B) $\text{Fe}$
* 34. Which catalyst is used in the contact process?
* Answer: (B) $\text{V}_2\text{O}_5$
* 35. Which metal is used in hydrogenation of oils?
* Answer: (B) $\text{Ni}$
* 36. Lanthanoids belong to which block?
* Answer: (D) f-block
* 37. Actinoids belong to which block?
* Answer: (A) f-block
* 38. Which is the first Lanthanoid?
* Answer: (A) $\text{Ce}$ (Cerium)
* 39. Which is the first actinoid?
* Answer: (A) $\text{Th}$ (Thorium)
* 40. The common oxidation state of lanthanoids is
* Answer: (B) +3
* 41. Which lanthanoid shows +4 oxidation state?
* Answer: (B) $\text{Ce}$
* 42. The gradual decrease in the size of lanthanoids is called
* Answer: (B) Lanthanoid contraction
* 43. Lanthanoid contraction is due to
* Answer: (B) Poor shielding effect by 4f electrons | 66 |
| 3 | * 44. Which element is radioactive?
* Answer: (C) $\text{U}$
* 45. All actinoids are
* Answer: (B) Radioactive
* 46. Which lanthanoid is used in lighter flints?
* Answer: (B) $\text{Ce}$
* 47. Mischmetal mainly contains
* Answer: (B) Lanthanoids and $\text{Ce}$
* 48. Which element is used in permanent magnets ($\text{NdFeB}$)?
* Answer: (B) $\text{Nd}$
* 49. The colour of $\text{KMnO}_4$ is
* Answer: (C) Purple
* 50. Which compound is orange in colour?
* Answer: (B) $\text{K}_2\text{Cr}_2\text{O}_7$
Would you like me to continue and solve questions 51 to 80, or do you need help with any of the Short/Long Answer questions in Section-B? | 51 |
| 4 | Here are the step-by-step solutions for questions 1 to 50 from the Class-XII Chemistry Examination paper:
## Section-A: Objective Type Questions
* 1. Which of the following is a coordination compound?
* Answer: (C) $\text{[Fe(CN)}_6\text{]}^{4-}$
* 2. The central metal atom in $\text{[Co(NH}_3\text{)}_6\text{]Cl}_3$ is
* Answer: (C) Co
* 3. $\text{NH}_3$ acts as
* Answer: (B) Ligand
* 4. $\text{CN}^-$ is an example of
* Answer: (D) Ambidentate ligand
* 5. The coordination number of $\text{Co}$ in $\text{[Co(NH}_3\text{)}_6\text{]}^{3+}$ is
* Answer: (C) 6
* 6. The oxidation state of $\text{Fe}$ in $\text{[Fe(CN)}_6\text{]}^{4-}$ is
* Answer: (B) +2
* 7. Which ligand is ambidentate?
* Answer: (C) $\text{NO}_2^-$
* 8. Which of the following is a chelating ligand?
* Answer: (C) $\text{EDTA}^{4-}$
* 9. The IUPAC name of $\text{[Cu(NH}_3\text{)}_4\text{]SO}_4$ is
* Answer: (B) Tetra-amminecopper (II) sulphate
* 10. Which of the following shows geometrical isomerism?
* Answer: (B) $\text{[Pt(NH}_3\text{)}_2\text{Cl}_2\text{]}$
* 11. Cisplatin is used in
* Answer: (B) Cancer treatment
* 12. Which of the following is a strong field ligand?
* Answer: (D) $\text{CN}^-$
* 13. Which ligand causes maximum crystal field splitting?
* Answer: (C) $\text{CN}^-$
* 14. High spin complexes are generally formed by
* Answer: (B) Weak field ligands
* 15. Which of the following is an inner orbital complex?
* Answer: (B) $\text{[Fe(CN)}_6\text{]}^{4-}$
* 16. The colour of coordination compounds is mainly due to
* Answer: (C) d-d electronic transitions
* 17. Which complex is diamagnetic?
* Answer: (C) $\text{[Fe(CN)}_6\text{]}^{4-}$
* 18. The coordination number of $\text{EDTA}$ in metal complexes is
* Answer: (D) 6
* 19. Which metal ion has $d^{10}$ configuration?
* Answer: (C) $\text{Zn}^{2+}$
* 20. Which complex has coordination number 4?
* Answer: (B) $\text{[Ni(CO)}_4\text{]}$
* 21. The general electronic configuration of d-block elements is
* Answer: (B) $\text{(n-1)d}^{1-10} \text{ns}^{1-2}$
* 22. Which series is called the first transition series?
* Answer: (B) $\text{Sc}$ to $\text{Zn}$
* 23. Transition elements are characterized by
* Answer: (B) Partially filled d-orbitals
* 24. Which element is not a transition element?
* Answer: (C) $\text{Zn}$
* 25. Which transition metal shows the highest number of oxidation states?
* Answer: (C) $\text{Mn}$
* 26. The oxidation state of $\text{Mn}$ in $\text{KMnO}_4$ is
* Answer: (D) +7
* 27. The colour of transition metal ions is mainly due to
* Answer: (B) d-d electronic transition
* 28. Transition metals are generally
* Answer: (B) Hard and dense
* 29. Which transition metal is used in stainless steel?
* Answer: (B) $\text{Cr}$
* 30. Which metal is used in galvanization?
* Answer: (C) $\text{Zn}$
* 31. The magnetic property of transition elements is due to
* Answer: (B) Unpaired electrons
* 32. Which ion is colourless?
* Answer: (C) $\text{Sc}^{3+}$
* 33. Which transition element is used as a catalyst in the Haber process?
* Answer: (B) $\text{Fe}$
* 34. Which catalyst is used in the contact process?
* Answer: (B) $\text{V}_2\text{O}_5$
* 35. Which metal is used in hydrogenation of oils?
* Answer: (B) $\text{Ni}$
* 36. Lanthanoids belong to which block?
* Answer: (D) f-block
* 37. Actinoids belong to which block?
* Answer: (A) f-block
* 38. Which is the first Lanthanoid?
* Answer: (A) $\text{Ce}$ (Cerium)
* 39. Which is the first actinoid?
* Answer: (A) $\text{Th}$ (Thorium)
* 40. The common oxidation state of lanthanoids is
* Answer: (B) +3
* 41. Which lanthanoid shows +4 oxidation state?
* Answer: (B) $\text{Ce}$
* 42. The gradual decrease in the size of lanthanoids is called
* Answer: (B) Lanthanoid contraction
* 43. Lanthanoid contraction is due to
* Answer: (B) Poor shielding effect by 4f electrons | 61 |
| 5 | QUESTIONS SOLVED | 59 |
| 6 |  بدون متن... | 67 |
| 7 |  +8بدون متن... | 227 |
| 8 |  +9بدون متن... | 233 |
| 9 |  +9بدون متن... | 231 |
| 10 | यदि किसी छात्र को
बी.ए./B.A.
बी.एस.सी./B.Sc.
बी.कॉम./B.Com.
एम.ए./M.A.
एम.एस.सी. /M.Sc.
डी.एल.एड.
बी.टी.सी. B.T.C.
बी.टेक /B Tech
एम.बी.ए./M.B.A.
पॉलिटेक्निक/POLYTECHNIC
आईटीआई /ITI
12th के बाद LLB
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| 14 | यदि किसी छात्र को
बी.ए./B.A.
बी.एस.सी./B.Sc.
बी.कॉम./B.Com.
एम.ए./M.A.
एम.एस.सी. /M.Sc.
डी.एल.एड.
बी.टी.सी. B.T.C.
बी.टेक /B Tech
एम.बी.ए./M.B.A.
पॉलिटेक्निक/POLYTECHNIC
आईटीआई /ITI
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