MCQ CHEMISTRY CLASS 12 CHAPTER :- SOLID STATE ( Assertion and Reason Type) 2021

                        XII , NEET and JEE

                       CHAPTER - 1  SOLID STATE

[MCQ] Assertion and Reason Type Note :

 In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. 

(i) Assertion and reason both are correct statements and reason is correct explanation for assertion. 

(ii) Assertion and reason both are correct statements but reason is not correct explanation for assertion. (iii) Assertion is correct statement but reason is wrong statement. 

(iv) Assertion is wrong statement but reason is correct statement.

1. . Assertion : The total number of atoms present in a simple cubic unit cell is one. Reason : Simple cubic unit cell has atoms at its corners, each of which is shared between eight adjacent unit cells.

A) Assertion and reason both are correct statements and reason is correct explanation for assertion.
B) Assertion and reason both are correct statements but reason is not correct explanation for assertion.
C) Assertion is correct statement but reason is wrong statement
D) Assertion is wrong statement but reason is correct statement

... Answer is A)
"Assertion and reason both are correct statements and reason is correct explanation for assertion"

2. . Assertion : Graphite is a good conductor of electricity however diamond belongs to the category of insulators. Reason : Graphite is soft in nature on the other hand diamond is very hard and brittle

A) Assertion and reason both are correct statements and reason is correct explanation for assertion.
B) Assertion and reason both are correct statements but reason is not correct explanation for assertion.
C) Assertion is correct statement but reason is wrong statement
D) Assertion is wrong statement but reason is correct statement

... Answer is B)
"Assertion and reason both are correct statements but reason is not correct explanation for assertion".

3.Assertion : Total number of octahedral voids present in unit cell of cubic close packing including the one that is present at the body centre, is four. Reason : Besides the body centre there is one octahedral void present at the centre of each of the six faces of the unit cell and each of which is shared between two adjacent unit cells :

A) Assertion and reason both are correct statements and reason is correct explanation for assertion.
B) Assertion and reason both are correct statements but reason is not correct explanation for assertion.
C) Assertion is correct statement but reason is wrong statement
D) Assertion is wrong statement but reason is correct statement

... Answer is C)
. "Assertion is correct statement but reason is wrong statement".

4. Assertion : The packing efficiency is maximum for the fcc structure. Reason : The cordination number is 12 in fcc structures.:

A) Assertion and reason both are correct statements and reason is correct explanation for assertion.
B) Assertion and reason both are correct statements but reason is not correct explanation for assertion.
C) Assertion is correct statement but reason is wrong statement
D) Assertion is wrong statement but reason is correct statement

... Answer is B)
"Assertion and reason both are correct statements but reason is not correct explanation for assertion".

5. Assertion : Semiconductors are solids with conductivities in the intermediate range from 10–6–104 ohm–1m–1. Reason : Intermediate conductivity in semiconductor is due to partially filled valence band

A) Assertion and reason both are correct statements and reason is correct explanation for assertion.
B) Assertion and reason both are correct statements but reason is not correct explanation for assertion.
C) Assertion is correct statement but reason is wrong statement
D) Assertion is wrong statement but reason is correct statement

... Answer is C)
"Assertion is correct statement but reason is wrong statement".