TG EAPCET 2024 (Online) 11th May Morning Shift | Atomic Structure Question 1 | Chemistry

If $n, l$ represent the principal and azimuthal quantum numbers respectively, the formula used to know the number of radial nodes possible for a given orbital is

$(n-l)$

$(n-1+1)$

$(n-1-1)$

$(n-2)$

TG EAPCET 2024 (Online) 11th May Morning Shift

MCQ (Single Correct Answer)

-0

If the radius of first orbit of hydrogen like ion is $1.763 \times 10^{-2} \mathrm{~nm}$, the energy associated with that orbit (in J ) is

$+1.962 \times 10^{-17}$

$-1.962 \times 10^{-17}$

$-0.872 \times 10^{-17}$

$-2.18 \times 10^{-18}$

TG EAPCET 2024 (Online) 10th May Evening Shift

MCQ (Single Correct Answer)

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The wavelength of an electron is $10^{3} \mathrm{~nm}$. What is its momentum in $\mathrm{kg} \mathrm{ms}^{-1}$ ? ( $\left.h=6.625 \times 10^{-34} \mathrm{Js}\right)$

$6.625 \times 10^{-31}$

$6.625 \times 10^{-37}$

$6.625 \times 10^{-28}$

$6.625 \times 10^{-34}$

TG EAPCET 2024 (Online) 10th May Evening Shift

MCQ (Single Correct Answer)

-0

Two statements are given below :

Statement I : In H atom, the energy of $2 s$ and $2 p$ orbitals is same.

Statements II : In He atom, the energy of $2 s$ and $2 p$ orbitals is same.

The correct answer is

Both statements I and II are correct.

Both statements I and II are not correct.

Statement I is correct but statement II is not correct.

Statement I is not correct but statement II is correct.

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