321659
Which of the following elements have pseudoinert gas configuration in the \(\mathrm{(\mathrm{n}-1)}\) shell?
1 Typical transition elements
2 Zinc group elements
3 Both
4 Neither
Explanation:
Elements which contains 18 electrons in its valence shell are known as pseudo inert gas configuration i.e., \({\rm{(n - 1)}}{{\rm{d}}^{{\rm{10}}}}{\rm{n}}{{\rm{s}}^{\rm{2}}}{\rm{n}}{{\rm{p}}^{\rm{6}}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321660
Platinum, palladium and iridium are called noble metals because
1 They are used as catalysts
2 They are inert towards many common reagents
3 They are shining lustrous pleasing to look at
4 They are found in active state
Explanation:
\(\mathrm{\mathrm{Pt}, \mathrm{Pd}}\) and Ir are called noble metals because they are inert towards many common reagents.
CHXII08:THE D- & F-BLOCK ELEMENTS
321661
Assertion : Promethium is a manmade element. Reason : It is radioactive and has been prepared by artificial means.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Promethium, primarily produced in nuclear reactors due to its scarcity, is a manmade element discovered after technetium. Its artificial synthesis involves bombarding elements in reactors to obtain isotopes used in research, nuclear batteries, and specific industries. Thus, option (1) is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS
321662
Among the following, the one that is not considered as a typical transition element.
1 chromium
2 manganese
3 cobalt
4 zinc
Explanation:
By definition, a transition element contain an incompletely filled d-subshell. With its \(\mathrm{3 d^{10}}\) configuration, zinc does not fall under this definition. Transition elements are metallic solids with high melting and boiling points. Zinc has a melting point of only \(\mathrm{420^{\circ} \mathrm{C}}\) and a relatively low boiling point of \(\mathrm{907^{\circ} \mathrm{C}}\). Zinc is also a metallic solid, which forms a variety of complexes like other transition elements. Hence zinc is not considered as a typical transition element.
NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII08:THE D- & F-BLOCK ELEMENTS
321659
Which of the following elements have pseudoinert gas configuration in the \(\mathrm{(\mathrm{n}-1)}\) shell?
1 Typical transition elements
2 Zinc group elements
3 Both
4 Neither
Explanation:
Elements which contains 18 electrons in its valence shell are known as pseudo inert gas configuration i.e., \({\rm{(n - 1)}}{{\rm{d}}^{{\rm{10}}}}{\rm{n}}{{\rm{s}}^{\rm{2}}}{\rm{n}}{{\rm{p}}^{\rm{6}}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321660
Platinum, palladium and iridium are called noble metals because
1 They are used as catalysts
2 They are inert towards many common reagents
3 They are shining lustrous pleasing to look at
4 They are found in active state
Explanation:
\(\mathrm{\mathrm{Pt}, \mathrm{Pd}}\) and Ir are called noble metals because they are inert towards many common reagents.
CHXII08:THE D- & F-BLOCK ELEMENTS
321661
Assertion : Promethium is a manmade element. Reason : It is radioactive and has been prepared by artificial means.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Promethium, primarily produced in nuclear reactors due to its scarcity, is a manmade element discovered after technetium. Its artificial synthesis involves bombarding elements in reactors to obtain isotopes used in research, nuclear batteries, and specific industries. Thus, option (1) is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS
321662
Among the following, the one that is not considered as a typical transition element.
1 chromium
2 manganese
3 cobalt
4 zinc
Explanation:
By definition, a transition element contain an incompletely filled d-subshell. With its \(\mathrm{3 d^{10}}\) configuration, zinc does not fall under this definition. Transition elements are metallic solids with high melting and boiling points. Zinc has a melting point of only \(\mathrm{420^{\circ} \mathrm{C}}\) and a relatively low boiling point of \(\mathrm{907^{\circ} \mathrm{C}}\). Zinc is also a metallic solid, which forms a variety of complexes like other transition elements. Hence zinc is not considered as a typical transition element.
321659
Which of the following elements have pseudoinert gas configuration in the \(\mathrm{(\mathrm{n}-1)}\) shell?
1 Typical transition elements
2 Zinc group elements
3 Both
4 Neither
Explanation:
Elements which contains 18 electrons in its valence shell are known as pseudo inert gas configuration i.e., \({\rm{(n - 1)}}{{\rm{d}}^{{\rm{10}}}}{\rm{n}}{{\rm{s}}^{\rm{2}}}{\rm{n}}{{\rm{p}}^{\rm{6}}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321660
Platinum, palladium and iridium are called noble metals because
1 They are used as catalysts
2 They are inert towards many common reagents
3 They are shining lustrous pleasing to look at
4 They are found in active state
Explanation:
\(\mathrm{\mathrm{Pt}, \mathrm{Pd}}\) and Ir are called noble metals because they are inert towards many common reagents.
CHXII08:THE D- & F-BLOCK ELEMENTS
321661
Assertion : Promethium is a manmade element. Reason : It is radioactive and has been prepared by artificial means.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Promethium, primarily produced in nuclear reactors due to its scarcity, is a manmade element discovered after technetium. Its artificial synthesis involves bombarding elements in reactors to obtain isotopes used in research, nuclear batteries, and specific industries. Thus, option (1) is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS
321662
Among the following, the one that is not considered as a typical transition element.
1 chromium
2 manganese
3 cobalt
4 zinc
Explanation:
By definition, a transition element contain an incompletely filled d-subshell. With its \(\mathrm{3 d^{10}}\) configuration, zinc does not fall under this definition. Transition elements are metallic solids with high melting and boiling points. Zinc has a melting point of only \(\mathrm{420^{\circ} \mathrm{C}}\) and a relatively low boiling point of \(\mathrm{907^{\circ} \mathrm{C}}\). Zinc is also a metallic solid, which forms a variety of complexes like other transition elements. Hence zinc is not considered as a typical transition element.
321659
Which of the following elements have pseudoinert gas configuration in the \(\mathrm{(\mathrm{n}-1)}\) shell?
1 Typical transition elements
2 Zinc group elements
3 Both
4 Neither
Explanation:
Elements which contains 18 electrons in its valence shell are known as pseudo inert gas configuration i.e., \({\rm{(n - 1)}}{{\rm{d}}^{{\rm{10}}}}{\rm{n}}{{\rm{s}}^{\rm{2}}}{\rm{n}}{{\rm{p}}^{\rm{6}}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS
321660
Platinum, palladium and iridium are called noble metals because
1 They are used as catalysts
2 They are inert towards many common reagents
3 They are shining lustrous pleasing to look at
4 They are found in active state
Explanation:
\(\mathrm{\mathrm{Pt}, \mathrm{Pd}}\) and Ir are called noble metals because they are inert towards many common reagents.
CHXII08:THE D- & F-BLOCK ELEMENTS
321661
Assertion : Promethium is a manmade element. Reason : It is radioactive and has been prepared by artificial means.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Promethium, primarily produced in nuclear reactors due to its scarcity, is a manmade element discovered after technetium. Its artificial synthesis involves bombarding elements in reactors to obtain isotopes used in research, nuclear batteries, and specific industries. Thus, option (1) is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS
321662
Among the following, the one that is not considered as a typical transition element.
1 chromium
2 manganese
3 cobalt
4 zinc
Explanation:
By definition, a transition element contain an incompletely filled d-subshell. With its \(\mathrm{3 d^{10}}\) configuration, zinc does not fall under this definition. Transition elements are metallic solids with high melting and boiling points. Zinc has a melting point of only \(\mathrm{420^{\circ} \mathrm{C}}\) and a relatively low boiling point of \(\mathrm{907^{\circ} \mathrm{C}}\). Zinc is also a metallic solid, which forms a variety of complexes like other transition elements. Hence zinc is not considered as a typical transition element.