d- and f-Block Elements

JEE Main Chemistry · 14 questions

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• Given below are two statements: Statement I: The number of pairs among [Ti^4+, V^2+],[V^2+, Mn^2+],[Mn^2+, Fe^3+] and [V^2+,…20268 April, Shift 2 · Q60
• Given below are two statements for catalytic properties of transition metals. Statement I: First row transition metals which act…20268 April, Shift 2 · Q61
• The correct order of first ( Δ_i H_1 ) and second ( Δ_i H_2 ) ionisation enthalpy values of Cr and Mn are: A. Δ_i H_1: Cr>Mn B.…20266 April, Shift 2 · Q60
• The correct statements among the following are. A. Basic vanadium oxide is used in the manufacture of H_2 SO_4. B. The spin-only…20266 April, Shift 1 · Q60
• Given below are two statements: Statement I: Presence of large number of unpaired electrons in transition metal atoms results in…20265 April, Shift 2 · Q60
• Which of the following is NOT a physical or chemical characteristics of interstitial compounds?20265 April, Shift 1 · Q60
• Pairs of elements with the same number of electrons in their respective 4f orbital are [Atomic number. Eu-63, Gd-64, Dy-66,…20264 April, Shift 2 · Q59
• Consider |x| is the difference in oxidation states of Mn in highest manganese fluoride and highest manganese oxide. The ions with…20264 April, Shift 2 · Q62
• The correct statements among the following are, A. Mo(VI) and W(VI) are less stable than Cr(VI). B. Ce^4+ and Tb^4+ are oxidant…20264 April, Shift 1 · Q60
• Correct statements from the following are A. Potassium dichromate is an oxidising agent and it oxidises FeSO_4 to Fe_2(SO_4)_3 in…20264 April, Shift 1 · Q61
• Given below are two statements: Statement I: Among Zn, Mn, Sc and Cu, the energy required to remove the third valence electron is…20262 April, Shift 2 · Q60
• Among Fe^2+, Fe^3+, Cr^2+ and Zn^2+, the ion that shows positive borax bead test and with highest ionisation enthalpy is:20262 April, Shift 2 · Q70
• Number of paramagnetic ions among the following d- and f-block metal ions is ____. Mn^2+, Cu^2+, Zn^2+, Yb^2+, Sc^3+, La^3+,…20262 April, Shift 2 · Q74
• Which of the following sets includes all the species that will change the orange colour of K_2 Cr_2 O_7 in acidic medium?20262 April, Shift 1 · Q61