Inorganic Chemistry Quiz - JEE Mains Level

Hi there. This quiz contains 30 questions ranging from easy to hard which will surely improve your knowledge in Inorganic Chemistry. It is sure going to improve your chances if you are preparing for exams Like JEE, NEET, SAT, etc.

Description

Chemistry, Periodicity, Inorganic, Atoms, Electrons, Electronegativity, Advanced, Helpful, JEE, SAT

Tags

Questions

1 min

Per question

4:52

Average time

3.0

Contest Score

Participants

Start Quiz

3 comments

Happy Chameleon Jun 5, 2020

There are some mistakes:
Question 15: you ask "Among the following species, which has the noble gas electronic configuration ?" and you give as right answer "S²⁻" since it has 18 electrons like Argon. And this is true.
But is also true that "O²⁻" has the elctronic configuration of Neon since it has 10 electrons. And Neon is a noble gas too.
So in this question there are two answers that are right.

Question 18: when you ask for the quantum numbers of a specific electron you can say with certainty the values for the first three numbers (n, l and m) but not for the last one (s).
For the valence electron of sodium we have n=3 since sodium is in the third period;
we have l=0 since sodium is in block s;
we have m=0 because its values vary from -l to +l and since l=0 the only possible value is 0;
what about s? s can have only two values: +½ and -½ but there are no evidences that this value is the first one or the other. It is just a convention. But I can tell you more: if we were forced to choose between +½ and -½ then, by sign convention, we choose the positive value. So I would say that is more correct say that the right answer is the first one "n=3, l=0, m=0, s=+½"

Question 24: the atomic volume, also known as Van der Waals volume is the volume "occupied" by a single atom. Since the volume can be approximated to a sphere, we can calculate the atomic volume if we know the value of the radius, known as "Van der Waals radius" (by using the formula for the volume of a sphere).
The values for the Van der Waals radius are tabulated and are respectively:
153 pm for Beryllium
192 pm for Boron
170 pm for Carbon
185 pm for Bromine
Since the volume is directly proportinal to the third power of the radius we can say that the higher the radius the higher the volume.
So the least atomic volume is the volume of Beryllium since it has the smallest atomic radius.
https://en.m.wikipedia.org/wiki/Van_der_Waals_radius

Chic Cobra author Jun 7, 2020

Question 24 : Actually the least atomic volume is that of Boron with 4.6 cm^3 / mol with respect to 5.0 cm^3 / mol of Beryllium.
The atomic radii of Boron is 1.17 A° compared to the 1.40 A° of Beryllium. This values can be verified from: https://chemglobe.org/ptoe/_/4.php
Regarding the other two questions :
Actually in the 15th question , It was supposed to be O₂⁻ . Since Telegram don't support Superscript & Subscripts for numbers and signs I had to use an app called Engineering Keyboard from Playstore to type in the Questions and option , it's quite buggy and due to the constant lag I might've not noticed the subscript going superscript. Thankyou for notifying , can be changed after the quiz.

Question 18 : Typo , m value was supposes to be 1 or something to give a single correct answer for students. Will change it after the quiz.

Happy Chameleon Jun 8, 2020

Assuming that the link you added for question 24 is correct and mine is not, actually it doesn't help you because yes, it is true that Boron's atomic volume is smaller than Beryllium's atomic volume, but is also true that Carbon's atomic volume is even smaller than Boron's one. From your link you can see that Carbon's atomic volume is 4.58 cm³/mol (less than the 4.6 cm³/mol value for Boron).
So in any case Boron is not the correct answer.

Take the quiz to leave a comment