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

EASY

NEET

IMPORTANT

Earn 100

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

36.36% studentsanswered this correctly

Important Questions on Some Basic Concepts of Chemistry

MEDIUM

NEET

IMPORTANT

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)

EASY

NEET

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

EASY

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>AIPMT - 25th July 2015>Q 13

What is mole fraction of the solute in a

1.00

m aqueous solution?

EASY

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>AIPMT - 25th July 2015>Q 14

If Avogadro number

N_{A}

, is changed from

6.022 \times 10^{23} m o l^{- 1}

to

6.022 \times 10^{20} m o l^{- 1}

, this would change:

EASY

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>AIPMT - 25th July 2015>Q 15

What is the mass of the precipitate formed when 50 mL of

16.9 %

solution of

A g N O_{3}

is mixed with 50 mL of

5.8 %

NaCl solution?

(Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 35.5)

EASY

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>AIPMT - 4th May 2014>Q 16

When

22.4

litres of

H_{2} (g)

is mixed with

11.2

litres of

C l_{2} (g),

each at STP, the moles of

H C l (g)

formed is equal to

MEDIUM

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>AIPMT - 4th May 2014>Q 17

1.0 g

of magnesium is burnt with

0.56 g

O_{2}

in a closed vessel. Which reaction is left in excess and how much? (At, wt.

M g = 24; O = 16)