MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Competitive Thinking>Q 35

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If the Avogadro number $N_{A}$ , is changed from $6.022 \times 10^{23} {mol}^{- 1} to 6.022 \times 10^{20} {mol}^{- 1}$ this would change

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Important Questions on Some Basic Concepts of Chemistry

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Competitive Thinking>Q 36

Suppose the elements

X

and

Y

combine to form two compounds

{XY}_{2}

and

X_{3} Y_{2}

. When

0.1

moles of

{XY}_{2}

weighs

10 g

and

0.05

moles of

X_{3} Y_{2}

weighs

9 g

, the atomic weights of

X

and

Y

are

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Competitive Thinking>Q 37

Which symbol replaces the unit of atomic mass, amu?

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Evaluation Test>Q 1

The weight of

112 mL

of oxygen at

NTP

on liquefaction would be

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Evaluation Test>Q 2

The largest number of molecules is present in

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Evaluation Test>Q 3

The mass of a molecule of water is

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Evaluation Test>Q 4

The modern atomic weight scale is based on

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Evaluation Test>Q 5

Which of the following gives the correct order of increasing masses?
(Atomic mass:

N = 14, O = 16, Cu = 63

).
I.

1

molecule of oxygen.
II.

1

atom of nitrogen.
III.

1 \times 10^{- 10} g

molecular weight of oxygen.
IV.

1 \times 10^{- 10} g

atomic weight of copper.

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Evaluation Test>Q 6

What is the weight of oxygen required for the complete combustion of

2.8 kg

of ethylene?