EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>NEET Phase 2 (14 October 2020)>Q 4

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IMPORTANT

Earn 100

One mole of carbon atom weighs $12 g$ , the number of atoms in it is equal to, (Mass of carbon $- 12$ is $1.9926 \times 10^{- 23} g)$

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Important Questions on Some Basic Concepts of Chemistry

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>NEET - 13th September 2020>Q 5

Which one of the followings has maximum number of atoms?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>NEET - 5th May 2019>Q 6

The number of moles of hydrogen molecules required to produce

20

moles of ammonia through Haber’s process is:

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>NEET - 6th May 2018>Q 7

In which case the number of molecules of water maximum?

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NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>NEET - 7th May 2017>Q 8

Which of the following is dependent on temperature?

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>NEET - 24th July 2016>Q 9

Suppose the elements

X

and

Y

combine to form two compounds

X Y_{2}

and

X_{3} Y_{2}

. When

0.1 mole

of

X Y_{2}

weighs

10 g

and

0.05 mole

of

X_{3} Y_{2}

weighs

9 g

, the atomic weights of

X

and

Y

are

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>AIPMT - 3rd May 2015>Q 10

A mixture of gases contains

H_{2}

and

O_{2}

gases in the ratio of

1 : 4

(w/w). What is the molar ratio of the two gases in the mixture?

MEDIUM

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>AIPMT - 25th July 2015>Q 11

20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample?

(Atomic weight: Mg = 24)

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>AIPMT - 25th July 2015>Q 12

The number of water molecules is maximum in