JEE Main 2023 (Online) 31st January Morning Shift | Structure of Atom Question 18 | Chemistry

PREVIOUS NEXT

JEE Main 2023 (Online) 31st January Morning Shift

MCQ (Single Correct Answer)

-1

$$\mathrm{Nd^{2+}}$$ = __________

$$\mathrm{4f^4 6s^2}$$

$$\mathrm{4f^3}$$

$$\mathrm{4f^4}$$

$$\mathrm{4f^2 6s^2}$$

JEE Main 2023 (Online) 31st January Morning Shift

MCQ (Single Correct Answer)

-1

Which transition in the hydrogen spectrum would have the same wavelength as the Balmer type transition from $$\mathrm{n=4}$$ to $$\mathrm{n}=2$$ of $$\mathrm{He}^{+}$$ spectrum

$$\mathrm{n}=3$$ to $$\mathrm{n}=4$$

$$\mathrm{n}=2$$ to $$\mathrm{n}=1$$

$$\mathrm{n}=1$$ to $$\mathrm{n}=2$$

$$\mathrm{n}=1$$ to $$\mathrm{n}=3$$

JEE Main 2023 (Online) 30th January Evening Shift

MCQ (Single Correct Answer)

-1

Maximum number of electrons that can be accommodated in shell with $n=4$ are:

JEE Main 2023 (Online) 30th January Evening Shift

MCQ (Single Correct Answer)

-1

The wave function $(\Psi)$ of $2 \mathrm{~s}$ is given by

$$ \Psi_{2 \mathrm{~s}}=\frac{1}{2 \sqrt{2 \pi}}\left(\frac{1}{a_0}\right)^{1 / 2}\left(2-\frac{r}{a_0}\right) e^{-r / 2 a_0} $$

At $r=r_0$, radial node is formed. Thus, $r_0$ in terms of $a_0$

$r_0=a_0$

$r_0=4 a_0$

$r_0=2 a_0$

$r_0=\frac{a_0}{2}$

PREVIOUS NEXT