The following data are obtained when nitrogen and oxygen react together to form different oxides: Mass of nitrogen Mass of oxygen a. 14 g 16 g b. 14 g 32 g c. 28 g 80 g Which law of chemical combination is obeyed by the above experimental data? Give the statement of the law.

Nitrogen and oxygen combine together to form different oxides. The mass ratio of these compounds is given in the above table. Thus, different masses of oxygen which combine with a fixed mass of nitrogen. The law illustrated in the given table is the Law of multiple proportions. The law of multiple proportions states that when two elements combine to form two or more compounds, then the different masses of one element, which combine with a fixed mass of the other element, bear a simple whole-number ratio with another.

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The composition (by atom) of compound A is $40 % X$ and $60 % Y$ . The composition (by atoms) of compound B is $25 % X and 75 % Y .$ According to the law of multiple proportion, the ratio of the weight of element Y in compounds A and B is:

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Important Questions on Stoichiometry

EASY

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

Select the correct statements from the following :

A. Atoms of all elements are composed of two fundamental particles.
B. The mass of the electron is $9.10939 \times 10^{- 31} kg$ .
C. All the isotopes of a given element show same chemical properties.
D. Protons and electrons are collectively known as nucleons.
E. Dalton's atomic theory, regarded the atom as an ultimate particle of matter.

Choose the correct answer from the options given below:

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Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

56.0 L

of nitrogen gas is mixed with excess of hydrogen gas and it is found that

20 L

of ammonia gas is produced, The volume of unused nitrogen gas is found to be_____

L

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Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

By heating

200 g

of metal carbonate,

112 g

of metal oxide on a gaseous compound are produced. Vapour density of the gaseous compound is

22

. How many moles of gaseous compound is produced in the reaction?

EASY

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

The statement related to law of definite proportions is

EASY

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

Among the following pairs of compounds, the one that does not illustrate the law of multiple proportions, is

MEDIUM

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been:

EASY

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

Which of the following is an example of Law of multiple proportion?

EASY

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

Which of the following conclusions could not be derived from Rutherford's

α

-particle scattering experiment:

HARD

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

Carbon combines with oxygen to form two oxides. The carbon content in one of the oxides is

42.9 %

while in the other oxide it is

27.3 %

. Show that these data are in agreement with the law of multiple proportions.

EASY

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

Rutherford's alpha rays scattering experiment eventually led to the conclusion that

EASY

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

What is the ratio of mass of an electron to the mass of a proton

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Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

The following data are obtained when nitrogen and oxygen react together to form different oxides:

Mass of nitrogen	Mass of oxygen
a. $14 g$	$16 g$
b. $14 g$	$32 g$
c. $28 g$	$80 g$

Which law of chemical combination is obeyed by the above experimental data? Give the statement of the law.

EASY

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

In Rutherford's experiment, which established the nuclear model of the atom, used a beam of _____.

EASY

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

Rutherford's

α

-particle scattering experiment proved that atom has

MEDIUM

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

Carbon and oxygen are known to form two compounds. The carbon content in one of these is

42.9 %

while in the other it is

27.3 %

. Find the ratio of amounts of

C r e a c t i n g w i t h s a m e m a s s o f O

MEDIUM

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

Zinc sulphate contains

22.65 %

of zinc and

43.9 %

of water of crystallisation. If the law of constant proportions is true then the weight of zinc required to produce

20

g of the crystals will be

EASY

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

How many g of 'S' is required to produce

10 g o f H_{2} S O_{4}

EASY

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

The radius of hydrogen atom is:

EASY

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

Nuclear theory of the atom was put forward by

HARD

Chemistry>Physical Chemistry>Stoichiometry>Laws of Chemical Combination

Law of multiple proportions is illustrated by one of the following pairs

The composition (by atom) of compound A is 40% X and 60% Y. The composition (by atoms) of compound B is 25% X and 75% Y. According to the law of multiple proportion, the ratio of the weight of element Y in compounds A and B is:

Important Questions on Stoichiometry

Learn and Prepare for any exam you want !

The composition (by atom) of compound A is $40 % X$ and $60 % Y$ . The composition (by atoms) of compound B is $25 % X and 75 % Y .$ According to the law of multiple proportion, the ratio of the weight of element Y in compounds A and B is: