Chemistry · JEE

Electronic configuration of elements and extra stability of half-filled and completely filled orbitals Mock Test for JEE

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Syllabus context

Part of Atomic Structure in JEE Main Chemistry.

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Q1ChemistryUnit 2: Atomic Structure

element has one electron in the outermost shell and attains duplet configuration after accepting one more electron and attains stability.

Q2ChemistryUnit 2: Atomic Structure

Statement I: Ground state electronic configuration of chromium atom is

(A r) 4 s^{1} 3 d^{5}

Statement II: Exchange energy is more wtih

(\boldsymbol{A} \boldsymbol{r}) \boldsymbol{4} \boldsymbol{s}^{1} \boldsymbol{3} \boldsymbol{d}^{5}

then

(\boldsymbol{A} \boldsymbol{r}) \boldsymbol{4} \boldsymbol{s}^{2} \boldsymbol{3} \boldsymbol{d}^{4}

Q3ChemistryUnit 2: Atomic Structure

Which of the following has

n s^{2} n p^{6} n d^{10}

(n+1) s^{0}

configuration?

Q4ChemistryUnit 2: Atomic Structure

Which of the properties of isotopes of an element is different?

Q5ChemistryUnit 2: Atomic Structure

Which of the following is not true for

\mathbf{1} \boldsymbol{H}^{1}, \mathbf{1} \boldsymbol{H}^{2}, \mathbf{1} \boldsymbol{H}^{3} \mathbf{?}

Q6ChemistryUnit 2: Atomic Structure

The stability of ferric ion is due to

Q7ChemistryUnit 2: Atomic Structure

Which amongst the following can lose 2 electrons to acquire the configuration of argon?

Q8ChemistryUnit 2: Atomic Structure

Electronic configuration

[\boldsymbol{K} \boldsymbol{r}] \boldsymbol{4} \boldsymbol{d}^{10}

belongs to:

Q9ChemistryUnit 2: Atomic Structure

The isoelectronic pair is: [Note : same valence shell]

Q10ChemistryUnit 2: Atomic Structure

1 \mathrm{s}^{2} 2 \mathrm{s}^{2} 2 \mathrm{p}^{6}

is the electron configuration of:

Q11ChemistryUnit 2: Atomic Structure

Assertion Isotopes of an element have same chemical properties Reason Chemical properties do not depend on the number of neutrons

Q12ChemistryUnit 2: Atomic Structure

The electronic configuration of the two outermost shells of an atom is

3 s^{2} 3 p^{6} 3 d^{5} 4 s^{2} .

What is this atom?

Q13ChemistryUnit 2: Atomic Structure

A neutral atom of an element with nuclear charge 11 times and mass 23 times that of hydrogen. Find the ratio of electrons to protons present in its stable ion.

Q14ChemistryUnit 2: Atomic Structure

Which of the following element is represented by electronic configuration

\mathbf{1} \boldsymbol{s}^{2} \mathbf{2} \boldsymbol{s}^{2} \mathbf{2} \boldsymbol{p}_{\boldsymbol{x}}^{1} \mathbf{2} \boldsymbol{p}_{\boldsymbol{y}}^{\mathbf{1}} \boldsymbol{2} \boldsymbol{p}_{z}^{1}

Q15ChemistryUnit 2: Atomic Structure

An atom of an element has 3 electrons in

4 p

subshell. The atomic number of the element is :

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