There are two phases in Joint Entrance Examination (JEE) i.e., JEE Main and JEE Advanced. JEE Main is conducted by Central Board of Secondary Education (CBSE) while JEE Advanced is conducted by one of the IITs. JEE Main 2018 is the preliminary stage of JEE, which is scheduled to be held on April 8, 2018 in offline mode and JEE Main 2018 computer-based test will be conducted on April 15 and 16, 2018. The students who will secure rank among top 224000 students will be eligible to appear for JEE Advanced 2018. Students who qualify both exams will be short-listed for admissions to engineering courses at IITs, NITs, and CFTIs.
Above is the very brief information about the JEE Main and JEE advanced. Once the candidates have submitted the application forms, it becomes very challenging to make a right study plan to crack these exams.
Most of the aspirants preparing for JEE Main and JEE Advanced are fresh candidates which means they are going to appear in the exam right after their board exams.
The other category is of repeaters who are going to take the JEE Main test for the second time to improve their rank. Such candidates would have been preparing for this entrance exam by taking various coaching classes or simply doing self-studies.
Let us discuss first about the JEE Main, the preliminary test which is scheduled to be held on April 8, 2018. The syllabus of the JEE Main exam is based on the class 11th and class 12th NCERT books which is a favorable factor for the fresher students. But repeaters can also take a lead by revising their whole year’s learning in a proper way.
All the aspirants need to keep a track of their preparedness by practicing more and more questions based on each important topic for JEE Main test.
In this article, we will provide you the 5 most important questions from different topics of all subjects i.e., Physics, Chemistry and Mathematics on daily basis.
Find the important questions from the topic States of Matter. Students always get 1-2 questions from this topic in the examination.
Every day you will get the entirely FRESH 5 Questions for JEE Main.
16th Mar, 2018: 5 Important Questions of States of Matter for JEE Main 2018.
Q 2. Calculate the osmotic pressure of 0.02 M solution of cane sugar at 600 K (R= 0.08212 atm degree-1 mol-1)
(a) 0.9852 atm
(b) 0.9582 atm
(c) 0.9825 atm
(d) 0.9528 atm
Ans. Option (a) is correct
Given, C = 0.02 M = 0.02 mol/L
R = 0.0821 L atm/K/mol,
T = 600 K
Osmotic Pressure, π = CRT
= 0.02 × 0.0821 × 600
= 0.9852 atm
Q 3. If the value of Avogadro number is 6.023 × 1023 mol−1 and the value of Boltzmann constant is 1.380 × 10−23 JK−1, then the number of significant digits in the calculated value of the universal gas constant is
Ans. Option (c) is correct
Universal gas constant, R = kNA
where, k = Boltzmann constant
and NA = Avogadro's number
∴ R = 1.380 × 10-23 × 6.023 × 1023J/Kmol
= 8.31174 ≅ 8.312
Since, k and NA both have four significant figures, so the value of R is also rounded off up to 4 significant figures.
When number is rounded off, the number of significant figure is reduced.
So, the number of significant figure is 4.
Q 4. According to kinetic theory of gases collisions are always elastic
(a) Heavier molecules transfer more momentum to the wall of the container
(b) Only a small number of molecules have very high velocity
(c) Between collisions, the molecules move in straight lines with constant velocities
(d) Between collisions, the molecules move in straight lines with constant velocities
Ans. Option (b) is correct
According to a postulate of kinetic theory of gases, collision between the molecules as well as with the wall of container is perfectly elastic in nature.
Hence, option (a) is correct.
All other statements are incorrect.
Q 5. A gas can be liquefied at temperature T and pressure P provided
(a) T = Tc and P < Pc
(b) T < Tc and P > Pc
(c) T > Tc and P > Pc
(d) T > Tc and P < Pc
Ans. Option (b) is correct
A gas can be liquefied when T < TC and pressure P > PC
Students can download the PDF of the important questions from Feb 2 to Mar 15, 2018.
Feb 2 to Feb 8, 2018
Feb 9 to Feb 15, 2018
Feb 16 to Feb 22, 2018
Feb 23 to Feb 28, 2018
March 1 to March 8, 2018
March 9 to March 15, 2018
JEE Advanced 2018 Information brochure released, check here application dates and exam details
JEE Main Application Form 2018:CBSE facilitates applicants with discrepancy removal in photograph
JEE Main 2018: New changes in exam centres, pattern and participating institutes
JEE Main 2018 exam schedule announced; Online exam on April 15 and 16