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Atomic Structure — JEE Chemistry MCQs

Master Atomic Structure for JEE Main with free chemistry MCQs. Each question includes a detailed solution and instant feedback — practice at easy, medium, and hard difficulty levels to build exam-ready confidence.

7 practice questions with instant feedback and solutions.

Easy•Atomic Structure

The increasing order of atomic radii of the following Group 13 elements is

Easy•Atomic Structure

For an electron in

3d

orbital, the values of

n

and

l

are:

Hard•Atomic Structure

Match the electronic configurations in List-I with appropriate metal complex ions in List-II and choose the correct option. [Atomic Number:

\mathrm{Fe}=26, \mathrm{Mn}=25

\mathrm{Co}=27

]

\textbf{List-I}

(P)

t_{2 g}^{6} e_{g}^{0}

(Q)

t_{2 g}^{3} e_{g}^{2}

(R)

\mathrm{e}^{2} \mathrm{t}_{2}^{3}

(S)

t_{2 g}^{4} e_{g}^{2}

\textbf{List-II}

(1)

\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}

(2)

\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}

(3)

\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}

(4)

\left[\mathrm{FeCl}_{4}\right]^{-}

(5)

\left[\mathrm{CoCl}_{4}\right]^{2-}

Medium•Atomic Structure

The de Broglie wavelength of an electron accelerated through a potential difference of

100

V is approximately (Given:

h = 6.6 \times 10^{-34}

J·s,

m_e = 9.1 \times 10^{-31}

kg,

e = 1.6 \times 10^{-19}

C):

Medium•Atomic Structure

Atom

\mathrm{X}

occupies the fcc lattice sites as well as alternate tetrahedral voids of the same lattice. The packing efficiency (in \%) of the resultant solid is closest to

Medium•Atomic Structure

The calculated spin only magnetic moments of

\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}

and

\left[\mathrm{CuF}_{6}\right]^{3-}

\mathrm{BM}

, respectively, are (Atomic numbers of

\mathrm{Cr}

and

\mathrm{Cu}

are 24 and 29, respectively)

Medium•Atomic Structure

The order of the oxidation state of the phosphorus atom in

\mathrm{H}_{3} \mathrm{PO}_{2}, \mathrm{H}_{3} \mathrm{PO}_{4}, \mathrm{H}_{3} \mathrm{PO}_{3}

, and

\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}