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Atomic Structure

Solution for Class 12, Chemistry, Atomic Structure

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The mass of a particle is

1 0^{- 10}

is and its didmetes is

1 0^{4}

en If its speed is

1 0^{6} cm / s

0.0001%

uncertointy in meascerement, the mintmum uncertainty in its position is.

Topic:

Atomic Structure

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In an atom having

2 K, 8 L, 8 M

2 N

electrons, the number of electrons with

m = 0; S = + \frac{1}{2}

6
2
8
16

Topic:

Atomic Structure

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The graphical representation of energy of

e^{-}

and atomic number is :-

Topic:

Atomic Structure

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HF QUESTION : Calculate number of photons emitted in 2 seconds having wavelength

2000 A

by a bulb of 60 Watt? Sol

_{0}^{4} 60

\Rightarrow 60

Joules fur recond

Topic:

Atomic Structure

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In which of the following molecule the

%

p

-character in hybrid orbital is greater than

50% ?

Only One Correct Answer

$NF_{3}$
$C_{2} H_{2}$
HCN
$C_{2} F_{2}$

Topic:

Atomic Structure

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A

B

be two sets such that

n (A) = 15

n (B) = 25

, then number of possible values of

n (A Δ B)

(symmetric difference of

A

B

30
16
26
40

Topic:

Atomic Structure

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51." Which of the following structures is the most preferred and hence of lowest energy for

SO_{3}

Topic:

Atomic Structure

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How many electrons in an atom may have the quantum numbers

n = 4

m_{s} = + \frac{1}{2}

? OPTIONS MARK FOR REVIEW CLEAR SELECTION

32
16
8
12

Topic:

Atomic Structure

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5: Hyperconjugation involves delocalization of electrons from -

$θ - 13$
$u - ρ$
$p - p$
$x - n$

Topic:

Atomic Structure

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Question 10

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(a) the reac

(16) - तो

H_{2} SO_{4} Yn, si

(10) जाएकम्

What thappens when a lead aterage battery is charged? (N) Lead diexide dissolves

Sulphuric acid is regenerated

Topic:

Atomic Structure

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Question 11

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Consider the following statements/expression regarding Heisenberg's uncertainty principle. (a)

Δ x \times Δ p_{x} \geq \frac{h}{4 π}

(b) It rules out existence of definite paths of electrons (c) It is negligible for the motion of macroscopic objects The correct statement(s) is/are OPTIONS MARK FOR REVIEW CLEAR SELECTION

(a) only
(a) and (b) only
(a) and (c) only
$(a), (b)$ and $(c)$

Topic:

Atomic Structure

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Question 12

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(Bohr's Model for Hydrogen atom) 2. What will be the longest wavelength line in Balmer series of spectrum of H-atom?

$546 nm$
$656 nm$
$566 nm$
$556 nm$

Topic:

Atomic Structure

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Question 13

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8or which orbital it could not be the Radial (42. Total distribution function? is 100 timen

s

43.

15
$2 p$
$3 p$
$3 d$

Topic:

Atomic Structure

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Question 14

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catalyst Package for NEET (Part-1) distribution function ?

ψ^{2} 4 π r^{2}

5
6

Topic:

Atomic Structure

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Question 15

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If wave number of particular transition will be the wave-n

$1 s$
$2 p$ $He^{+}$ and $Li^{2 +}$ ?
$3 p$
$3 d$
$2 x, 3 x$

Topic:

Atomic Structure

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Question 16

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6. You are gives tow nuclides

_{3}^{7} X

and (i) Are they the isotopes of the same element? (ii) Which one of the two is likely to be more stable? Give reason.

Topic:

Atomic Structure

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Question 17

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2.2

(i) Calculate the total number of electrons present in one mole of methane.

$λ$ (ii) Find (a) the total number and (b) the total mass of neutrons in $7 mg$ of $^{14} C$ .
(Assume that mass of a neutron $= 1.675 \times 1 0^{- 27} kg$ ).
X(iii) Find (a) the total number and (b) the total mass of protons in $34 mg$ of $NH_{3}$ at STP.
Will the answer change if the temperature and pressure are changed?

Topic:

Atomic Structure

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Question 18

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A photon of energy

4.5 eV

strikes on a metal surface of work function

3.0 eV

. If uncertainty in position is

\frac{25}{4 π} \overset{˚}{A}

, find the uncertainty in measurement of de-Broglie wavelength (in Å).

Topic:

Atomic Structure

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Question 19

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A proton accelerated from rest through a potential difference of 16 volts has a wavelength

λ

associated with it. An alpha particle in order to have the same wavelength must be accelerated from rest through a potential difference of -

Topic:

Atomic Structure

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Question 20

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NEET(UG) (Odisha) 2019 27. The

pH

0.01 M NaOH

(aq) solution will be

$7.01$
2
12
9

Topic:

Atomic Structure

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