JEE Main · 2024 · 06 Apr 2024 · Shift 1 · d and f Block Elements

WhatsApp Email

Among CrO, Cr₂O₃ and CrO₃, the sum of spin-only magnetic moment values of basic and amphoteric oxides is ______ × 10⁻² BM (nearest integer).
(Given atomic number of Cr is 24)

Answer: 877

Solution

CrO

is a basic oxide (Cr is

+ 2

d^{4}

μ = 4 (4 + 2) = 24 = 4.90

BM.

C r_{2} O_{3}

is amphoteric (Cr is

+ 3

d^{3}

μ = 3 (3 + 2) = 15 = 3.87

BM. (

Cr O_{3}

is acidic,

d^{0}

, and is excluded.)
Sum

= 4.90 + 3.87 = 8.77

= 877 \times 1 0^{- 2}

BM. The value is

877.

JEE Main · 2024 · 06 Apr 2024 · Shift 1 · Integer answer

Practise more: all JEE Main PYQs on d and f Block Elements →

More JEE Main questions on d and f Block Elements

$MnO_{4}^{2 -}$ , in acidic medium, disproportionates to :
JEE Main 2026View solution →
Consider the following reactions:
$NaCl + K_{2} Cr_{2} O_{7} + H_{2} SO_{4} \to A + KHSO_{4} + NaHSO_{4} + H_{2} O$ …
JEE Main 2026View solution →
Given below are some of the statements about Mn and $Mn_{2} O_{7}$ . Identify the correct statements
A. Mn forms the oxide $Mn_{2} O_{7}$ in which Mn is in its highest oxidation state.
B. Oxygen stabilizes the Mn in higher oxidation states by fo …
JEE Main 2026View solution →
On heating a mixture of common salt and $K_{2} Cr_{2} O_{7}$ in equal amount along with concentrated $H_{2} SO_{4}$ in a test tube, a gas is evolved. Formula of the gas evolved and oxidation state of the central metal atom in the gas r …
JEE Main 2026View solution →
Among the following oxides of 3d elements, the number of mixed oxides are _____. …
JEE Main 2026View solution →
The oxidation state of chromium in the final product formed in the reaction between KI and acidified $K_{2} Cr_{2} O_{7}$ solution is:
JEE Main 2026View solution →