Chemistry Crash Course JEE Main>Chapter 25 - Structure of Atom>Level 1>Q 40

MEDIUM

JEE Main

IMPORTANT

Earn 100

Calculate the energy emitted when electrons of $1 g$ atom of hydrogen undergo transition, giving spectral lines of the lowest energy in the visible region of its atomic spectra.

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Important Questions on Structure of Atom

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 25 - Structure of Atom>Level 1>Q 41

Consider three electron jumps in $H$ -atom:

$X : n = 3 \to 1 Y : n = 4 \to 2 Z : n = 5 \to 3$

For which transition, the electron will experience the largest change in orbit radius?

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 25 - Structure of Atom>Level 1>Q 42

2 g

of hydrogen atoms are excited by radiation. The spectral study indicated that

25 %

of the atoms are in the third energy level,

20 %

atoms are in the second energy level and the rest in the ground state. What is the total energy evolved when the atoms return to the ground state?

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JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 25 - Structure of Atom>Level 1>Q 43

Which of the following elements contain non-spherical electron density?

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JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 25 - Structure of Atom>Level 1>Q 44

The ratio of the velocity of

{SO}_{2}

molecules to the velocity of

O_{2}

molecules such that they are associated with de Broglie waves of the same wavelength is

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 25 - Structure of Atom>Level 1>Q 45

The position of both an electron and a

He

atom is known within

1 nm

and the momentum of the electron is known within

50 \times 10^{- 26}

\frac{Kg m}{s}

. The minimum uncertainty in the measurement of the momentum of the

He

atom is:

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 25 - Structure of Atom>Level 1>Q 46

The angular momentum of an electron in a particular orbit of a single-electron species is

3.17 \times 10^{- 34} kg m^{2} s^{- 1}

. The total number of possible unique values of

l

and

m

, respectively, are:

HARD

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 25 - Structure of Atom>Level 1>Q 47

Suppose that the spin quantum number could have three possible values. Then, which of the following atomic number would not represent a noble gas?

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 25 - Structure of Atom>Level 1>Q 48

If the differentiating electron in an atom goes to the

4 p -

orbital, then the atomic number of the element is in the range of: