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Most Important 100 Chemistry Solved Questions for JEE Main 2019

Chemistry is a very high scoring subject in JEE Main exam. Around 80% of the questions asked in JEE Main Chemistry Paper are based on theoretical concepts. While preparing for JEE Main Chemistry, students should focus on theory part more than the numerical part. There are three sections in Chemistry i.e., Physical Chemistry, Inorganic Chemistry and Organic Chemistry. The numerical questions are asked only from Physical Chemistry. The difficulty level of the questions in this subject is easier than the other two subjects i.e., Physics and Mathematics. That’s why, Chemistry is the easiest part in the Joint Entrance Examination (JEE Main) for many students.

After doing a detailed analysis of JEE Main Previous Years’ questions papers and the latest updated JEE Main syllabus, the subject experts have collected a set of 100 questions based on the important topics of Chemistry. The questions are solved using appropriate concepts. Questions are taken from important topics like some basic concepts in chemistry, states of matter, atomic structure, chemical bonding and molecular structure, chemical thermodynamics, solutions, equilibrium, redox reactions and electrochemistry, chemical kinetics, surface chemistry, purification and characterisation of organic compounds, hydrocarbons, chemistry in everyday life, organic compounds containing halogens, organic compounds containing oxygen, organic compounds containing nitrogen, polymers, some basic principles of organic chemistry, biomolecules, hydrogen, block elements (alkali and alkaline earth metals), p-block elements group 13 to group 18 elements, d and f - block elements, co-ordination compounds, environmental chemistry, general principles and processes of isolation of metals, classification of elements and periodicity in properties.

All the aspirants should track their preparedness by practicing more and more questions based on each important topic for JEE Main test. Students can download the complete collection of the questions in the PDF form with the help of the link given at the end of this article.

JEE Main Examination 2019: Tips to score above 90 marks in Chemistry Section

Some sample questions are given below:

Question:

Name the structure of silicate in which two oxygen atoms of [SiO4]4- are shared.

(a) Pyrosilicate

(b) Sheet silicate

(c) Linear chain silicate

(d) Three dimensional silicate

Solution: (C)

In linear chain silicate, two oxygen atoms per tetrahedron are shared.

Question:

Root mean square velocity of a gas is x ms-1 at a pressure p atm and temperature T K. If pressure is made 2p under isothermal condition root mean square speed becomes

(a) 2x

(b) 4x

(c) x/2

(d) x

Solution: (d)


Question:

The rms velocity of molecules of a gas of density 4 kg m-3 and pressure 1.2 × 105 Nm-2 is

(a) 900 ms-1

(b) 120 ms-1

(c) 600 ms-1

(d) 300 ms-1

Solution: (d)

Most Important 100 Maths Solved Questions for JEE Main 2019

Question:

One gram of silver gets distributed between 10 cm3 of molten zinc and 100 cm3 of molten lead at 800 o C. The percentage of silver in the zinc layer is approximately

(Given: Partition coefficient of Ag in Zn and Pb is 300)

(a) 89

(b) 91

(c) 97

(d) 94

Solution: (c)

Let mass of Ag in Zn = x g

Mass of Ag in Pb = (1 – x) g

As partition coefficient of Ag in Zn and Pb is 300.

Question:

An amount of solid NH4HS is placed in a flask already containing ammonia gas at a certain temperature and 0.50 atm pressure. Ammonium hydrogen sulphide decomposes to yield NH3 and H2S gases in the flask. When the decomposition reaction reaches equilibrium, the total pressure in the flask rises to 0.84 atm. The equilibrium constant for NH4HS decomposition at this temperature is

(a) 0.30

(b) 0.18

(c) 0.17

(d) 0.11

Solution: (d)

To download the complete PDF file, click on the following link:

Chemistry Solved Question for JEE Main 2019

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