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Test: Quantum Mechanical Model of Atom - 1 - NEET MCQ


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10 Questions MCQ Test NCERTs at Fingertips: Textbooks, Tests & Solutions - Test: Quantum Mechanical Model of Atom - 1

Test: Quantum Mechanical Model of Atom - 1 for NEET 2024 is part of NCERTs at Fingertips: Textbooks, Tests & Solutions preparation. The Test: Quantum Mechanical Model of Atom - 1 questions and answers have been prepared according to the NEET exam syllabus.The Test: Quantum Mechanical Model of Atom - 1 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Quantum Mechanical Model of Atom - 1 below.
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Test: Quantum Mechanical Model of Atom - 1 - Question 1

The de Broglie wavelength associated with a ball of mass 200 g and moving at a speed of 5 metres/hour, is of the order of (h = 6.625 x 10-34 J s) is

Detailed Solution for Test: Quantum Mechanical Model of Atom - 1 - Question 1

According to de Broglie’s equation 

Test: Quantum Mechanical Model of Atom - 1 - Question 2

A body of mass 10 g is moving with a velocity of 100 m s-1. The wavelength associated with it is

Detailed Solution for Test: Quantum Mechanical Model of Atom - 1 - Question 2

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Test: Quantum Mechanical Model of Atom - 1 - Question 3

The wavelength of an electron moving with velocity of 107 m s-1 is

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Test: Quantum Mechanical Model of Atom - 1 - Question 4

What will be the wavelength of an electron moving with 1/10th of velocity of light?

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Test: Quantum Mechanical Model of Atom - 1 - Question 5

If the velocity of an electron in Bohr’s first orbit is 2.19 x 106 m s-1, what will be the de Broglie wavelength associated with it?

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Test: Quantum Mechanical Model of Atom - 1 - Question 6

Match the column I with column II and mark the appropriate choice.

Test: Quantum Mechanical Model of Atom - 1 - Question 7

If uncertainty principle is applied to an object of mass 1 milligram, the uncertainty value of velocity and position will be

Detailed Solution for Test: Quantum Mechanical Model of Atom - 1 - Question 7


= 0.52 x 10-28 m2 s-1 (1 mg = 10-6 kg)

Test: Quantum Mechanical Model of Atom - 1 - Question 8

What will be the uncertainty in velocity of a bullet with a mass of 10 g whose position is known with ± 0.01 mm?

Detailed Solution for Test: Quantum Mechanical Model of Atom - 1 - Question 8

Δx = ± 0.01 mm = 1 x 10-5 m,  
m = 10 g = 1 x 10-2kg

= 5.275 x 10-28m s-1.

Test: Quantum Mechanical Model of Atom - 1 - Question 9

What will be the mass of a particle if uncertainty in its position is 10-8 m and velocity is 5.26 x 10-25 m s-1?

Detailed Solution for Test: Quantum Mechanical Model of Atom - 1 - Question 9

Δx·mΔv = h/4π

Test: Quantum Mechanical Model of Atom - 1 - Question 10

What will be the uncertainty in velocity of an electron when the uncertainty in its position is 1000 Å?

Detailed Solution for Test: Quantum Mechanical Model of Atom - 1 - Question 10

Δx·mΔv = h/4π
Δx - 1000 Å = 1000 x 10-10 m or 10-7 m

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