KVPY Stream-SA (Class 11) Chemistry: Questions 102 - 106 of 133

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Question number: 102

» Hydrocarbons » Preparation, Properties and Reactions

Appeared in Year: 2009

MCQ▾

Question

When calcium carbide is add to water, the gas that is evolved is –

Choices

Choice (4) Response
a.

hydrogen

b.

acetylene

c.

Carbon dioxide

d.

methane

Question number: 103

» Basic Concepts in Chemistry » Atomic and Molecular Masses

Appeared in Year: 2012

MCQ▾

Question

The weight of calcium oxide formed by burning 20 g of calcium in excess oxygen is:

Choices

Choice (4) Response
a.

56 g

b.

28 g

c.

72 g

d.

36 g

Question number: 104

» Atomic Structure » De-Broglie's Relationship

Appeared in Year: 2014

MCQ▾

Question

If the Planck’s constant h = 6.6×1034 Js, the de-Broglie wavelength of a particle having momentum of 3.3×1024 kg. m. s-1 will be -

Choices

Choice (4) Response
a.

0.2 Å

b.

0.02 Å

c.

0.002 Å

d.

2 Å

Question number: 105

» Atomic Structure » Shapes of S, P and D - Orbitals

MCQ▾

Question

Choose the correct statements -

(1) Designation for the orbital with the quantum number n = 3, ℓ = 1, m =-1 may be 3px or 3py

(2) Designation for the orbital with the quantum number n = 4, = 2, m =+2 may be 4dxy or 4d x2 – y2

(3) Designation for me orbital with the quantum number n = 5, = 0, m = 0 may be 5s

(4) Designation for the orbital with the quantum number n = 2, = 1, m = 0 may be 3pz

Choices

Choice (4) Response
a.

1, 2 and 3 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

2 and 4 are correct

Passage

Einstein had suggested that light could behave as a wave as well as like a particle i. e. it has dual character. In 1924, de-Broglie proposed that an electron, behaves both as a material particle and as a wave. This proposed a new theory wave mechanical theory of matter. According to this theory, the electrons, protons and even atom when in motion possess wave properties. According to de-Broglie, the wavelength associated with a particle of mass m, moving with velocity v is given by the relation, λ = h/mv where h is Planck’s constant.

Question number: 106 (1 of 3 Based on Passage) Show Passage

» Atomic Structure » De-Broglie's Relationship

MCQ▾

Question

For particles having same kinetic energy, the de Broglie wavelength is -

Choices

Choice (4) Response
a.

Inversely proportional to its velocity

b.

Independent of velocity and mass

c.

Directly proportional to its velocity

d.

unpredictable

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