Chemistry · JEE

Laws of chemical combination, Atomic and molecular masses Mock Test for JEE

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Syllabus context

Part of Some Basic Concepts in Chemistry in JEE Main Chemistry.

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Q1ChemistryUnit 1: Some Basic Concepts in Chemistry

Who proposed that equal volumes of gases at the same temperature and pressure have same number of molecules.

Q2ChemistryUnit 1: Some Basic Concepts in Chemistry

A pair of compounds which is an illustration of law of multiple proportions is:

Q3ChemistryUnit 1: Some Basic Concepts in Chemistry

Carbon and oxygen forms two compounds. Carbon content in one of them is

42.9 \%

while in the other is 27.3\%. The given data is in support with:

Q4ChemistryUnit 1: Some Basic Concepts in Chemistry

3 volumes of hydrogen are required to combine with one volume of nitrogen to form 2 volumes of ammonia. When 1 mole of hydrogen is allowed to react with the mole of nitrogen, the two gases?

Q5ChemistryUnit 1: Some Basic Concepts in Chemistry

Assertion Pure water obtained from different states of India always contains hydrogen and oxygen in the ratio of 1: 8 by mass. Reason Total mass of reactants and products during chemical change is always the same.

Q6ChemistryUnit 1: Some Basic Concepts in Chemistry

Chemical compounds are formed to have constant composition irrespective of their This question has multiple correct options

Q7ChemistryUnit 1: Some Basic Concepts in Chemistry

Zinc sulphate contains

22.65 \% \mathrm{Zn}

and

43.9 \% H_{2} O .

If the law of constant proportions is true, then the mass of zinc required to give 40 g crystals will be:

Q8ChemistryUnit 1: Some Basic Concepts in Chemistry

16.8 \mathrm{g}

of metal carbonate on thermal decomposition gave 8 g of metallic oxide and

8.8 \mathrm{g}

of carbon dioxide. They follow:

Q9ChemistryUnit 1: Some Basic Concepts in Chemistry

French chemist laid the foundation to the scientific investigation of matter by describing that substances react by following certain laws.

Q10ChemistryUnit 1: Some Basic Concepts in Chemistry

Compound

A

and

B

are two oxides of sulfur. Compound A is 50\% sulfur by mass, while Compound B is

40 \%

sulfur by mass. Given the atomic masses of sulfur and oxygen are 32 amu and 16 am

u

respectively, which of the following statements is NOT a valid interpretation of these data? This question has multiple correct options

Q11ChemistryUnit 1: Some Basic Concepts in Chemistry

Which of the following statement about Avogadro's hypothesis is correct?

Q12ChemistryUnit 1: Some Basic Concepts in Chemistry

A sample of

C a C O_{3}

has

C a-40 \%, C=

12 \%

and

0=48 \%

. If the law of constant proportions is true, then the mass of Ca in 5 g of

C a C O_{3}

from another source will be:

Q13ChemistryUnit 1: Some Basic Concepts in Chemistry

In answering the above questions, which law has been used?

[\mathrm{C}=12, \mathrm{N}=14

0=16]

Q14ChemistryUnit 1: Some Basic Concepts in Chemistry

1.008 grams of hydrogen combines with

35.453 \mathrm{g}

of chlorine to form

36.463 \mathrm{g}

of a pure compound (hydrogen chloride) Dalton's explanation for this experimental fact might be:

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