# WBJEE: Important Questions and Preparation Tips – Solid State

Oct 25, 2017 12:09 IST

WBJEE 2018: Soild State

The chapter Solid State is a very important part of Physical Chemistry in the syllabus of West Bengal Joint Entrance Examination (WBJEE) 2018.

After the detailed analysis of previous year papers and the latest syllabus of WBJEE Examination, our Subject Experts have prepared these notes including all the important topics like classification of solids, unit cell, primitive unit cell, centered unit cell, types of centered unit cell, crystal system etc.

These notes also contain some previous year solved questions which will help students to understand the type and difficulty level of the questions which can be asked in coming WBJEE Examination 2018.

These notes will help students to save their precious time and to cover maximum syllabus in minimum time just before the examination. These notes can be used as a quick revision material just before few days of the examination.

WBJEE Chemistry Syllabus: 2017 - 2018

Important Concepts:

Important Questions and Preparation Tips - Phenols

Some previous years solved questions are given below:

Question 1:

Suppose the mass of a single Ag atom is ‘m’. Ag metal crystallizes in fcc lattice with unit cell of length ‘a’. The density of Ag metal in terms of ‘a’ and ‘m’ is

Solution 1:

We know that in FCC lattice the coordination number is 12 and it contains 4 atoms per unit cell.

Mass of one atom = m

Mass of unit cell = 4m

Volume of unit cell = a3

So, the density of unit cell is given as:

Hence, the correct option is (a).

WBJEE Online Test: Chemistry - Haloalkanes and Haloarenes

Question 2:

Ionic solids with Schottky defect may contain in their structure

(a) cation vacancies only

(b) cation vacancies and interstitial cations

(c) equal number of cation and anion vacancies

(d) anion vacancies and interstitial anions

Solution 2:

Ionic solids with Schottky defect contain equal number of cation and anion vacancies.

Hence, the correct option is (c).

Question 3:

Solution 3:

Hence, the correct option is (a).

WBJEE Solved Sample Paper

Question 4:

Solution 4:

Hence, the correct option is (a).

WBJEE 2017 Question Paper with Answer Key

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