Question
Question 70:
The atoms of which of the following pair of elements are most likely to exist in free state ?
(a) hydrogen and helium
(b) argon and carbon
(c) neon and nitrogen
(d) helium and neon
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Text solutionVerified
Answer:
(d) helium and neon
Atoms of helium and neon exist in a free state because they are inert gases and chemically inactive.
Atoms of helium and neon exist in a free state because they are inert gases and chemically inactive.
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Practice more questions from Chemistry (Lakhmir Singh)
Q1
Question 69:
The scientist who proposed the first letter (or first letter and another letter) of the Latin or English name of an element as its symbol, was :
(a) Dalton
(b) Proust
(c) Lavoisier
(d) Berzelius
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Q2
Question 70:
The atoms of which of the following pair of elements are most likely to exist in free state ?
(a) hydrogen and helium
(b) argon and carbon
(c) neon and nitrogen
(d) helium and neon
(a) hydrogen and helium
(b) argon and carbon
(c) neon and nitrogen
(d) helium and neon
Q3
Question 71:
Which of the following elements has the same molecular mass as its atomic mass ?
(a) nitrogen
(b) neon
(c) oxygen
(d) chlorine
View all(a) nitrogen
(b) neon
(c) oxygen
(d) chlorine
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Question Text | Question 70:
The atoms of which of the following pair of elements are most likely to exist in free state ? (a) hydrogen and helium (b) argon and carbon (c) neon and nitrogen (d) helium and neon |
Updated On | Dec 1, 2022 |
Topic | Atoms and Molecules |
Subject | Science |
Class | Class 9 |
Answer Type | Text solution:1 Video solution: 1 |
Upvotes | 166 |
Avg. Video Duration | 1 min |