What is the $\mathrm{SI}$ unit of density?

Important Questions on Some Basic Concepts of Chemistry

EASY

MHT-CET

IMPORTANT

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 2

A sample of pure carbon dioxide irrespective of its source, contains $27.27\%$ of carbon and $72.73\%$ of oxygen. The data supports the ________ 

EASY

MHT-CET

IMPORTANT

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 3

Which property of an element is always a whole number?

MEDIUM

MHT-CET

IMPORTANT

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 4

The weight of a molecule of the compound ${\mathrm{C}}_{60}{\mathrm{H}}_{122}$is __________________

MEDIUM

MHT-CET

IMPORTANT

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 5

Boron has two stable isotopes, ${}^{10}\mathrm{B}$ $(19\%)$and ${}^{11}\mathrm{B}$ $(81\%).$ The atomic mass that should appear for boron in the periodic table is_______ .

MEDIUM

MHT-CET

IMPORTANT

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 6

An element, $\mathrm{X}$ has the following isotopic composition:
                   ${}^{200}\mathrm{X} : 90\% ;{ }^{199}\mathrm{X} : 8.0\% ;{ }^{202}\mathrm{X} : 2.0\%$
The weighted average atomic mass of the natural occurring element $\mathrm{X}$ is close to ______________ 

EASY

MHT-CET

IMPORTANT

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 7

The number of atoms in $4.25 \mathrm{g}$ of ${\mathrm{NH}}_3$ is approximately _______

EASY

MHT-CET

IMPORTANT

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 8

What amount of dioxygen $\left( \mathrm{in} \mathrm{g}\right)$ contains $1.8 \times {10}^{22}$ molecules?

MEDIUM

MHT-CET

IMPORTANT

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 9

The number of oxygen atoms in $4.4 \mathrm{g}$ of ${\mathrm{CO}}_2$ is approximately