Jagran Josh Logo
  1. Home
  2. |  
  3. Engineering Exams|  

JEE Main Solved Chemistry Practice Paper 2017 - 2018 Set-III

Jan 12, 2018 17:54 IST
JEE Main 2018: Chemistry Practice Paper
JEE Main 2018: Chemistry Practice Paper

Students have only three months remaining for the preparation. They will have to gear up their preparation to secure a good rank in the examination. Only top 224000 scorer of JEE Main examination will be allowed to appear for JEE Advanced examination 2018.

In this article, students will get a complete set of 30 questions based on the latest pattern and covering most of the syllabus of Chemistry.

The main objective of this Solved Practice Paper is to help students to practice a set of 30 questions based on the complete syllabus. Also, it will help students to track their progress.

JEE Main 2017 - 2018 Solved Practice Paper Set-II

About the paper:

1. This paper contains 30 objective type questions with only one correct option.

2. Questions have been taken from different topics like Thermodynamics, Environmental Chemistry, Solid State, Electrochemistry, Surface Chemistry, Coordination Compounds, Biomolecules, Polymers,  Alcohols, Phenols and Ethers, Aldehydes, Ketones and Carboxylic Acids, etc.

3. Detail solution for all the questions.

Few sample questions from the Practice Paper are given below:

Question:

An electrochemical cell can behave like an electrolytic cell when     

(a) Ecell = 0                                                      

(b) Ecell > Eext

(c) Eext > Ecell                                                  

(d) Ecell = Eext

Sol. (c)

If an external opposite potential is applied on the galvanic cell and increased reaction continues to take place till the opposing voltage reaches the value 1.1V.

At this stage no current flow through the cell and if there is any further increase in the external potential then reaction starts functioning in opposite direction. Hence, this works as an electrolytic cell.

Question:

Which of the following is correct?

(a) Isotones differ in the number of neutrons.

(b) Isobars contain the same number of neutrons but differ in the number of protons.

(c) No isotope of hydrogen in radioactive,

(d) Density of nucleus is much greater than that of atom.

Sol. (d)  

Statement (a) is not correct because isotones have the same number of neutrons.

Statement (b) is not correct as isobars differ in the number of neutrons because A is same but Z is different and neutrons = A – Z.

Statement (c) is not correct because tritium  is radioactive.

Question:

The sharp melting point of crystalline solids is due to           

(a) A regular arrangement of constituent particles observed over a short distance in the crystal lattice

(b) A regular arrangement of constituent particles observed over a long distance in the crystal lattice

(c) Same arrangement of constituent particles in different directions

(d) Different arrangement of constituent particles in different directions

Sol. (b)

Crystalline solid has regular arrangement of constituent particles observed over a long distance in the crystal lattice. Due to this regular arrangement crystalline solid have sharp melting point.

Question:

Photoelectric effect is the phenomenon in which

(a) Photons come out the metal when hit by a beam of electrons

(b) Photons come out of the nucleus of an atom under the action of an electric field

(c) Electrons come out of metal with a constant velocity which depends on frequency and intensity of incident light

(d) Electrons come out of metal with different velocities not greater than a certain value which depends upon frequency of incident light and not on intensity

Sol. (d)  

In photoelectric effect, kinetic energy and hence velocity is directly proportional to frequency of the incident light and independent of the intensity of light.

Question:

Which is the correct statement about birth control pills?

(a) Contain estrogen only

(b) Contain progesterone only

(c) Contain a mixture of estrogen and progesterone derivatives

(d) Progesterone enhances ovulation

Sol. (c)

Chemical substances which are used to check pregnancy in women are called birth control pills. Birth control pills essentially contain a mixture of synthetic estrogen and progesterone derivatives, both of these are sex hormones, It is known that progesterone suppresses ovulation and estrogen control the menstrual cycle.

Some of the commonly used pills contain a mixture of norethindrone (a progesterone derivative) and novestrol (an estrogen).

Conclusion:

This practice paper will help students to practice new questions from the complete syllabus of Chemistry. Students can easily track their progress after solving this practice paper. Also they can revise the topics where they stuck while attempting this paper.

Download Complete Practice Paper

JEE Main Solved Mathematics Practice Paper 2017 - 2018 Set-III

Post Comment

Latest Videos

Register to get FREE updates

    All Fields Mandatory
  • (Ex:9123456789)
  • Please Select Your Interest
  • Please specify

  • By clicking on Submit button, you agree to our terms of use
    ajax-loader
  • A verifcation code has been sent to
    your mobile number

    Please enter the verification code below

Newsletter Signup
Follow us on
X

Register to view Complete PDF