d and f Block Elements PYQs - Last 10 Years
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Practice 201 JEE Main Chemistry questions from d and f Block Elements. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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Last 10 Years d and f Block Elements Questions
Showing 50 of 201 filtered questions.
1D And F Block Elements
In a borax bead test under hot condition, a metal salt (one from the given) is heated at point B of the flame, resulted in green colour salt bead. The spin-only magnetic moment value of the salt is _______ BM (Nearest integer) [Given atomi...
INTEGER+4 / -12024
2D And F Block Elements
The metal that shows highest and maximum number of oxidation state is :
MCQ+4 / -12024
3D And F Block Elements
The fusion of chromite ore with sodium carbonate in the presence of air leads to the formation of products \(\mathrm{A}\) and \(\mathrm{B}\) along with the evolution of \(\mathrm{CO}_2\). The sum of spin-only magnetic moment values of A and...
INTEGER+4 / -12024
4D And F Block Elements
The number of ions from the following that have the ability to liberate hydrogen from a dilute acid is _________.
\(\mathrm{Ti}^{2+}, \mathrm{Cr}^{2+} \text { and } \mathrm{V}^{2+}\)
\(\mathrm{Ti}^{2+}, \mathrm{Cr}^{2+} \text { and } \mathrm{V}^{2+}\)
MCQ+4 / -12024
5D And F Block Elements
While preparing crystals of Mohr's salt, dil \(\mathrm{H}_2 \mathrm{SO}_4\) is added to a mixture of ferrous sulphate and ammonium sulphate, before dissolving this mixture in water, dil \(\mathrm{H_2SO_4}\) is added here to :
MCQ+4 / -12024
6D And F Block Elements
Consider the following reaction
\(\mathrm{MnO}_2+\mathrm{KOH}+\mathrm{O}_2 \rightarrow \mathrm{A}+\mathrm{H}_2 \mathrm{O} \text {. }\)
Product '\(\mathrm{A}\)' in neutral or acidic medium disproportionate to give products '\(\mathrm{B}\)' a...
\(\mathrm{MnO}_2+\mathrm{KOH}+\mathrm{O}_2 \rightarrow \mathrm{A}+\mathrm{H}_2 \mathrm{O} \text {. }\)
Product '\(\mathrm{A}\)' in neutral or acidic medium disproportionate to give products '\(\mathrm{B}\)' a...
INTEGER+4 / -12024
7D And F Block Elements
The element which shows only one oxidation state other than its elemental form is :
MCQ+4 / -12024
8D And F Block Elements
A first row transition metal with highest enthalpy of atomisation, upon reaction with oxygen at high temperature forms oxides of formula \(\mathrm{M}_2 \mathrm{O}_{\mathrm{n}}\) (where \(\mathrm{n}=3,4,5\)). The 'spin-only' magnetic moment ...
INTEGER+4 / -12024
9D And F Block Elements
The metals that are employed in the battery industries are
A. \(\mathrm{Fe}\)
B. \(\mathrm{Mn}\)
C. \(\mathrm{Ni}\)
D. \(\mathrm{Cr}\)
E. \(\mathrm{Cd}\)
Choose the correct answer from the options given below:
A. \(\mathrm{Fe}\)
B. \(\mathrm{Mn}\)
C. \(\mathrm{Ni}\)
D. \(\mathrm{Cr}\)
E. \(\mathrm{Cd}\)
Choose the correct answer from the options given below:
MCQ+4 / -12024
10D And F Block Elements
Identify correct statements from below:
A. The chromate ion is square planar.
B. Dichromates are generally prepared from chromates.
C. The green manganate ion is diamagnetic.
D. Dark green coloured \(\mathrm{K}_2 \mathrm{MnO}_4\) disproport...
A. The chromate ion is square planar.
B. Dichromates are generally prepared from chromates.
C. The green manganate ion is diamagnetic.
D. Dark green coloured \(\mathrm{K}_2 \mathrm{MnO}_4\) disproport...
MCQ+4 / -12024
11D And F Block Elements
Choose the correct statements from the following
A. \(\mathrm{Mn}_2 \mathrm{O}_7\) is an oil at room temperature
B. \(\mathrm{V}_2 \mathrm{O}_4\) reacts with acid to give \(\mathrm{VO}_2{ }^{2+}\)
C. \(\mathrm{CrO}\) is a basic oxide
D. $$\...
A. \(\mathrm{Mn}_2 \mathrm{O}_7\) is an oil at room temperature
B. \(\mathrm{V}_2 \mathrm{O}_4\) reacts with acid to give \(\mathrm{VO}_2{ }^{2+}\)
C. \(\mathrm{CrO}\) is a basic oxide
D. $$\...
MCQ+4 / -12024
12D And F Block Elements
Diamagnetic Lanthanoid ions are :
MCQ+4 / -12024
13D And F Block Elements
The orange colour of \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\) and purple colour of \(\mathrm{KMnO}_4\) is due to
MCQ+4 / -12024
14D And F Block Elements
\(\mathrm{KMnO}_4\) decomposes on heating at \(513 \mathrm{~K}\) to form \(\mathrm{O}_2\) along with
MCQ+4 / -12024
15D And F Block Elements
The correct IUPAC name of \(\mathrm{K}_2 \mathrm{MnO}_4\) is
MCQ+4 / -12024
16D And F Block Elements
Which of the following statements are correct about \(\mathrm{Zn}, \mathrm{Cd}\) and \(\mathrm{Hg}\) ?
A. They exhibit high enthalpy of atomization as the d-subshell is full.
B. \(\mathrm{Zn}\) and \(\mathrm{Cd}\) do not show variable oxida...
A. They exhibit high enthalpy of atomization as the d-subshell is full.
B. \(\mathrm{Zn}\) and \(\mathrm{Cd}\) do not show variable oxida...
MCQ+4 / -12024
17D And F Block Elements
Which of the following acts as a strong reducing agent? (Atomic number: \(\mathrm{Ce}=58, \mathrm{Eu}=63, \mathrm{Gd}=64, \mathrm{Lu}=71\))
MCQ+4 / -12024
18D And F Block Elements
The electronic configuration for Neodymium is:
[Atomic Number for Neodymium 60]
[Atomic Number for Neodymium 60]
MCQ+4 / -12024
19D And F Block Elements
\(\mathrm{NaCl}\) reacts with conc. \(\mathrm{H}_2 \mathrm{SO}_4\) and \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\) to give reddish fumes (B), which react with \(\mathrm{NaOH}\) to give yellow solution (C). (B) and (C) respectively are ;
MCQ+4 / -12024
20D And F Block Elements
Which of the following electronic configuration would be associated with the highest magnetic moment?
MCQ+4 / -12024
21D And F Block Elements
Total number of ions from the following with noble gas configuration is _________. \(\mathrm{Sr}^{2+}(z=38), \mathrm{Cs}^{+}(z=55), \mathrm{La}^{2+}(z=57), \mathrm{Pb}^{2+}(z=82), \mathrm{Yb}^{2+}(z=70)\) and \(\mathrm{Fe}^{2+}(z=26)\)
INTEGER+4 / -12024
22D And F Block Elements
Choose the correct option having all the elements with \(\mathrm{d}^{10}\) electronic configuration from the following :
MCQ+4 / -12024
23D And F Block Elements
Given below are two statements :
Statement (I) : In the Lanthanoids, the formation \(\mathrm{Ce}^{+4}\) is favoured by its noble gas configuration.
Statement (II) : \(\mathrm{Ce}^{+4}\) is a strong oxidant reverting to the common +3 state.
...
Statement (I) : In the Lanthanoids, the formation \(\mathrm{Ce}^{+4}\) is favoured by its noble gas configuration.
Statement (II) : \(\mathrm{Ce}^{+4}\) is a strong oxidant reverting to the common +3 state.
...
MCQ+4 / -12024
24D And F Block Elements
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : In aqueous solutions $\mathrm{Cr}^{2+}$ is reducing while $\mathrm{Mn}^{3+}$ is oxidising in nature.
Reason (R) : Ex...
Assertion (A) : In aqueous solutions $\mathrm{Cr}^{2+}$ is reducing while $\mathrm{Mn}^{3+}$ is oxidising in nature.
Reason (R) : Ex...
MCQ+4 / -12024
25D And F Block Elements
In chromyl chloride, the number of d-electrons present on chromium is same as in (Given at no. of \(\mathrm{Ti}: 22, \mathrm{~V}: 23, \mathrm{Cr}: 24, \mathrm{Mn}: 25, \mathrm{Fe}: 26\) )
MCQ+4 / -12023
26D And F Block Elements
Which halogen is known to cause the reaction given below :
\(2 \mathrm{Cu}^{2+}+4 \mathrm{X}^{-} \rightarrow \mathrm{Cu}_{2} \mathrm{X}_{2}(\mathrm{s})+\mathrm{X}_{2}\)
\(2 \mathrm{Cu}^{2+}+4 \mathrm{X}^{-} \rightarrow \mathrm{Cu}_{2} \mathrm{X}_{2}(\mathrm{s})+\mathrm{X}_{2}\)
MCQ+4 / -12023
27D And F Block Elements
Strong reducing and oxidizing agents among the following, respectively, are :
MCQ+4 / -12023
28D And F Block Elements
During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which of the below medium will favour the reaction.
MCQ+4 / -12023
29D And F Block Elements
Given below are two statements: one is labelled as "Assertion A" and the other is labelled as "Reason R"
Assertion A : In the complex \(\mathrm{Ni}(\mathrm{CO})_{4}\) and \(\mathrm{Fe}(\mathrm{CO})_{5}\), the metals have zero oxidation sta...
Assertion A : In the complex \(\mathrm{Ni}(\mathrm{CO})_{4}\) and \(\mathrm{Fe}(\mathrm{CO})_{5}\), the metals have zero oxidation sta...
MCQ+4 / -12023
30D And F Block Elements
Element not present in Nessler's reagent is :
MCQ+4 / -12023
31D And F Block Elements
The correct order of basicity of oxides of vanadium is :
MCQ+4 / -12023
32D And F Block Elements
\(\mathrm{Nd^{2+}}\) = __________
MCQ+4 / -12023
33D And F Block Elements
When \(\mathrm{Cu}^{2+}\) ion is treated with \(\mathrm{KI}\), a white precipitate, \(\mathrm{X}\) appears in solution. The solution is titrated with sodium thiosulphate, the compound \(\mathrm{Y}\) is formed. \(\mathrm{X}\) and $$\mathrm{Y...
MCQ+4 / -12023
34D And F Block Elements
The number of electrons involved in the reduction of permanganate to manganese dioxide in acidic medium is _____________.
INTEGER+4 / -12023
35D And F Block Elements
During the qualitative analysis of \(\mathrm{SO}_{3}^{2-}\) using dilute \(\mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{SO}_{2}\) gas is evolved which turns \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) solution (acidified with dilute $$\mat...
MCQ+4 / -12023
36D And F Block Elements
$\mathrm{KMnO}_4$ oxidises $\mathrm{I}^{-}$ in acidic and neutral/faintly alkaline solutions, respectively, to :
MCQ+4 / -12023
37D And F Block Elements
Formulae for Nessler's reagent is :
MCQ+4 / -12023
38D And F Block Elements
An indicator 'X' is used for studying the effect of variation in concentration of iodide on the rate of reaction of iodide ion with \(\mathrm{H_2O_2}\) at room temp. The indicator 'X' forms blue coloured complex with compound 'A' present in...
MCQ+4 / -12023
39D And F Block Elements
The set of correct statements is :
(i) Manganese exhibits +7 oxidation state in its oxide.
(ii) Ruthenium and Osmium exhibit +8 oxidation in their oxides.
(iii) Sc shows +4 oxidation state which is oxidizing in nature.
(iv) Cr shows oxidisi...
(i) Manganese exhibits +7 oxidation state in its oxide.
(ii) Ruthenium and Osmium exhibit +8 oxidation in their oxides.
(iii) Sc shows +4 oxidation state which is oxidizing in nature.
(iv) Cr shows oxidisi...
MCQ+4 / -12023
40D And F Block Elements
Given below are two statements :
Statement I : Nickel is being used as the catalyst for producing syn gas and edible fats.
Statement II : Silicon forms both electron rich and electron deficient hydrides.
In the light of the above statements...
Statement I : Nickel is being used as the catalyst for producing syn gas and edible fats.
Statement II : Silicon forms both electron rich and electron deficient hydrides.
In the light of the above statements...
MCQ+4 / -12023
41D And F Block Elements
How many of the following metal ions have similar value of spin only magnetic moment in gaseous state? ______________
(Given : Atomic number V, 23; Cr, 24; Fe, 26; Ni, 28)
V\(^{3+}\), Cr\(^{3+}\), Fe\(^{2+}\), Ni\(^{3+}\)
(Given : Atomic number V, 23; Cr, 24; Fe, 26; Ni, 28)
V\(^{3+}\), Cr\(^{3+}\), Fe\(^{2+}\), Ni\(^{3+}\)
INTEGER+4 / -12023
42D And F Block Elements
A chloride salt solution acidified with dil.HNO\(_3\) gives a curdy white precipitate, [A], on addition of AgNO\(_3\). [A] on treatment with NH\(_4\)OH gives a clear solution B. A and B are respectively :
MCQ+4 / -12023
43D And F Block Elements
An ammoniacal metal salt solution gives a brilliant red precipitate on addition of dimethylglyoxime. The metal ion is :
MCQ+4 / -12023
44D And F Block Elements
Which one amongst the following are good oxidizing agents?
A. Sm\(^{2+}\)
B. Ce\(^{2+}\)
C. Ce\(^{4+}\)
D. Tb\(^{4+}\)
Choose the most appropriate answer from the options given below :
A. Sm\(^{2+}\)
B. Ce\(^{2+}\)
C. Ce\(^{4+}\)
D. Tb\(^{4+}\)
Choose the most appropriate answer from the options given below :
MCQ+4 / -12023
45D And F Block Elements
Highest oxidation state of Mn is exhibited in \(\mathrm{Mn_2O_7}\). The correct statements about \(\mathrm{Mn_2O_7}\) are
(A) Mn is tetrahedrally surrounded by oxygen atoms.
(B) Mn is octahedrally surrounded by oxygen atoms.
(C) Contains Mn...
(A) Mn is tetrahedrally surrounded by oxygen atoms.
(B) Mn is octahedrally surrounded by oxygen atoms.
(C) Contains Mn...
MCQ+4 / -12023
46D And F Block Elements
Among following compounds, the number of those present in copper matte is ___________.
A. \(\mathrm{CuCO_{3}}\)
B. \(\mathrm{Cu_{2}S}\)
C. \(\mathrm{Cu_{2}O}\)
D. \(\mathrm{FeO}\)
A. \(\mathrm{CuCO_{3}}\)
B. \(\mathrm{Cu_{2}S}\)
C. \(\mathrm{Cu_{2}O}\)
D. \(\mathrm{FeO}\)
INTEGER+4 / -12023
47D And F Block Elements
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : \(\mathrm{Cu^{2+}}\) in water is more stable than \(\mathrm{Cu^{+}}\).
Reason (R) : Enthalpy of hydration for $$\math...
Assertion (A) : \(\mathrm{Cu^{2+}}\) in water is more stable than \(\mathrm{Cu^{+}}\).
Reason (R) : Enthalpy of hydration for $$\math...
MCQ+4 / -12023
48D And F Block Elements
Which element is not present in Nessler's reagent?
MCQ+4 / -12023
49D And F Block Elements
The total change in the oxidation state of manganese involved in the reaction of $\mathrm{KMnO}_{4}$ and potassium iodide in the acidic medium is ____________.
INTEGER+4 / -12023
50D And F Block Elements
In Chromyl chloride, the oxidation state of chromium is $(+)$ _______________.
INTEGER+4 / -12023