NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII08:THE D- & F-BLOCK ELEMENTS
321367
Assertion : Transition metals are poor reducing agents. Reason : Transition metals form numerous alloys with other metals.
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:
In actual practice, transition metals react with acids very slowly and act as poor reducing agents. This is due to the protection of metal as a result of formation of thin oxide protective film. Further, their poor tendency as reducing agent is due to high ionisation energy, high heat of vapourisation and low heat of hydration. Transition metals form alloys due to similar size. So option (2) is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS
321368
Percentage of silver in the alloy 'german silver' is
4 \(90\% \,\,{\rm{Ag}}\) and \(10\% \,\,{\rm{Cu}}\)
Explanation:
"925 fine silver" means 925 parts of pure Ag in 1000 parts of an alloy. Therefore, in terms of percentage, it will be \(92.5\% \,\,{\rm{Ag}}\) and \(7.5\% \,\,{\rm{Cu}}\).
321367
Assertion : Transition metals are poor reducing agents. Reason : Transition metals form numerous alloys with other metals.
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:
In actual practice, transition metals react with acids very slowly and act as poor reducing agents. This is due to the protection of metal as a result of formation of thin oxide protective film. Further, their poor tendency as reducing agent is due to high ionisation energy, high heat of vapourisation and low heat of hydration. Transition metals form alloys due to similar size. So option (2) is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS
321368
Percentage of silver in the alloy 'german silver' is
4 \(90\% \,\,{\rm{Ag}}\) and \(10\% \,\,{\rm{Cu}}\)
Explanation:
"925 fine silver" means 925 parts of pure Ag in 1000 parts of an alloy. Therefore, in terms of percentage, it will be \(92.5\% \,\,{\rm{Ag}}\) and \(7.5\% \,\,{\rm{Cu}}\).
321367
Assertion : Transition metals are poor reducing agents. Reason : Transition metals form numerous alloys with other metals.
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:
In actual practice, transition metals react with acids very slowly and act as poor reducing agents. This is due to the protection of metal as a result of formation of thin oxide protective film. Further, their poor tendency as reducing agent is due to high ionisation energy, high heat of vapourisation and low heat of hydration. Transition metals form alloys due to similar size. So option (2) is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS
321368
Percentage of silver in the alloy 'german silver' is
4 \(90\% \,\,{\rm{Ag}}\) and \(10\% \,\,{\rm{Cu}}\)
Explanation:
"925 fine silver" means 925 parts of pure Ag in 1000 parts of an alloy. Therefore, in terms of percentage, it will be \(92.5\% \,\,{\rm{Ag}}\) and \(7.5\% \,\,{\rm{Cu}}\).
321367
Assertion : Transition metals are poor reducing agents. Reason : Transition metals form numerous alloys with other metals.
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:
In actual practice, transition metals react with acids very slowly and act as poor reducing agents. This is due to the protection of metal as a result of formation of thin oxide protective film. Further, their poor tendency as reducing agent is due to high ionisation energy, high heat of vapourisation and low heat of hydration. Transition metals form alloys due to similar size. So option (2) is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS
321368
Percentage of silver in the alloy 'german silver' is
4 \(90\% \,\,{\rm{Ag}}\) and \(10\% \,\,{\rm{Cu}}\)
Explanation:
"925 fine silver" means 925 parts of pure Ag in 1000 parts of an alloy. Therefore, in terms of percentage, it will be \(92.5\% \,\,{\rm{Ag}}\) and \(7.5\% \,\,{\rm{Cu}}\).
