d and f Block Elements

The spin only magnetic moments (in BM) for free Ti3+, V2+ and Sc3+ ions respectively are :(At.No. Sc : 21, Ti : 22, V : 23)

Given below are two statements :Statement I : CeO2 can be used for oxidation of aldehydes and ketones.Statement II : Aqueous solution of EuSO4 is a strong reducing agent.In the light of the above statements, choose the correct answer from t...

In which of the following pairs, the outer most electronic configuration will be the same?

Given below are two statements :
Statement I : Colourless cupric metaborate is reduced to cuprous metaborate in a luminous
flame.
Statement II : Cuprous metaborate is obtained by heating boric anhydride and copper
sulphate in a non-luminous...

The incorrect statement among the following is :

What is the correct order of the following elements with respect to their density?

Number of electrons that Vanadium (Z = 23) has in p-orbitals is equal to _____________

The set having ions which are coloured and paramagnetic both is :

Identify the element for which electronic configuration in +3 oxidation state is [Ar]3d5 :

In the given chemical reaction, colors of the Fe2+ and Fe3+ ions, are respectively :5Fe2+ + MnO\(_4^ -\) + 8H+ \(\to\) Mn2+ + 4H2O + 5Fe3+

Match List - I with List - II



List - I

List - II




(a)
Chlorophyll
(i)
Ruthenium


(b)
Vitamin-\({B_{12}}\)
(ii)
Platinum


(c)
Anticancer drug
(iii)
Cobalt...

The oxide that shows magnetic property is :

What is the spin-only magnetic moment value (BM) of a divalent metal ion with atomic number 25, in it's aqueous solution?

Given below are two statements :Statement I : Potassium permanganate on heating at 573K forms potassium manganate.Statement II : Both potassium permanganate and potassium manganate are tetrahedral and paramagnetic in nature.In the light of ...

In the ground state of atomic Fe(Z = 26), the spin-only magnetic moment is ____________ \(\times\) 10\(-\)1 BM. (Round off to the Nearest Integer). [Given : \(\sqrt 3\) = 1.73, \(\sqrt 2\) = 1.41 ]

The common positive oxidation states for an element with atomic number 24, are :

Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R :Assertion A : Size of Bk3+ ion is less than Np3+ ion.Reason R : The above is a consequence of the lanthanoid contraction.In the light of t...

Given below are two statements :Statement I : The Eo value for Ce4+ / Ce3+ is + 1.74 V.Statement II : Ce is more stable in Ce4+ state than Ce3+ state.In the light of the above statements, choose the most appropriate answer from the options ...

Arrange the following metal complex/compounds in the increasing order of spin only magnetic moment. Presume all the three, high spin system.(Atomic numbers Ce = 58, Gd = 64 and Eu = 63)(a) (NH4)2[Ce(NO3)6](b) Gd(NO3)3 and (c) Eu(NO3)3

Fex2 and Fey3 are known when x and y are :

5 g of zinc is treated separately with an excess
of
(a) dilute hydrochloric acid and
(b) aqueous sodium hydroxide.
The ratio of the volumes of H2 evolved in these
two reactions is :

The sum of the total number of bonds between
chromium and oxygen atoms in chromate and
dichromate ions is ____________.

The atomic radius of Ag is closed to :

Consider the following reactions :
\(NaCl{\rm{ }} + {\rm{ }}{K_2}C{r_2}{O_7} + \mathop {{H_2}S{O_4}}\limits_{(conc.)}\)\(\to\) (A) + side products

(A) + NaOH \(\to\) (B) + Side products
$$\left( B \right){\rm{ }} + \mathop {{H_2}S{O_4...

The set that contains atomic numbers of only
transition elements, is :

The lanthanoid that does NOT show +4 oxidation
state is :

Mischmetal is an alloy consisting mainly of :

In the sixth period, the orbitals that are filled are :

The correct electronic configuration and spin-only magnetic moment (BM) of Gd3+ (Z = 64),
respectively, are :

The elements with atomic numbers 101 and 104
belong to, respectively :

The incorrect statement(s) among (a) - (c) is
(are)
(a) W(VI) is more stable than Cr(VI).
(b) In the presence of HCl, permanganate
titrations provide satisfactory results.
(c) Some lanthanoid oxides can be used as
phosphors.

The incorrect statement is :

The transition element that has lowest enthalpy of atomisation, is :

The maximum number of possible oxidation
states of actinoides are shown by :

The statement that is INCORRECT about the
interstitial compounds is :

The correct order of atomic radii is :

The pair that has similar atomic radii is :

The element that usually does NOT show variable oxidation states is :

\(\underline A \,\,\buildrel {4KOH,{O_2}} \over \longrightarrow \,\,\mathop {2\underline B }\limits_{\left( {Green} \right)} \,\, + \,\,2{H_2}O\)
$$3\underline B \,\,\buildrel {4HCl} \over
\longrightarrow \,\,\mathop {2\underline C }\limi...

The effect of lanthanoid contraction in the lanthanoid series of elements by and large means :

Wilkinson catalyst is : (Et = C2H5)

The 71st electron of an element X with an atomic number of 71 enters into the orbital :

Consider the hydrated ions of Ti2+, V2+, Ti3+, and Sc3+. The correct order of their spin-only magnetic
moments is :

The INCORRECT statement is :

The highest possible oxidation states of uranium and plutonium, respectively are :

The correct order of the first ionization enthalpies is :

When XO2 is fused with an alkali metal hydroxide in presence of an oxidizing agent such as KNO3 ; a dark green product is formed which disproportioates in acidic solution to afforda dark purple solution. X is :

The incorrect statement is :

Which of the following ions does not liberate hydrogen gas on reaction with dilute acids ?

The pair of compounds having metals in their highest oxidation state is :