Assertion and Reason Questions for Class 10 Science Chapter 5 Periodic Classification of Elements PDF

Periodic Classification of Elements Class 10 Assertion and Reason Type Questions have been prepared by CBSE Experts. Solve Assertion and Reason Questions for Class 10 Science Chapter 5 Periodic Classification of Elements for better understanding. Assertion Reason question for Class 10 Science Chapter 5 is prepared on the latest exam pattern.

Students can solve Assertion and Reason Questions for Class 10 Science to boost their preparation Periodic Classification of Elements Resources 10 Assertion and Reason Type Questions are provided to help students tackle the question asked in the board exam.

Periodic Classification of Elements Class 10 Assertion Reason Questions

The following questions consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

Q.1. Assertion (A) : Isotopes are placed together in the modern periodic table.
Reason (R) : Isotopes have same atomic number.

(a) Both A and R are true and R is the correct explanation of A.


Q.2. Assertion (A) : In Mendeléev Periodic Table, cobalt was placed before nickel.
Reason (R): The atomic mass of cobalt is less than nickel.

(c) A is true but R is false.


Q.3. Assertion (A) : Mendeléev concentrated on the compounds formed by elements with oxygen and hydrogen in his periodic table.
Reason (R) : Hydrogen and oxygen are very reactive and form compounds with most elements.

(a) Both A and R are true and R is the correct explanation of A.


Q.4. Assertion (A) : Magnesium belongs to 3rd period of modern periodic table.
Reason (R) : The valence electrons of magnesium is 2.

(b) Both A and R are true but R is not the correct explanation of A.


Q.5. Assertion (A) : According to Mendeléev, the properties of elements are a periodic function of their atomic masses.
Reason (R) : Atomic number is equal to the number of protons.

(b) Both A and R are true but R is not the correct explanation of A.


Q.6. Assertion (A) : Noble gases have zero valency.
Reason (R) : Noble gases have stable electronic configuration.

(a) Both A and R are true and R is the correct explanation of A.


Q.7. Assertion (A) : Silicon is a metalloid.
Reason (R) : Silicon shows only properties of non-metals.

(c) A is true but R is false.


Q.8. Assertion (A) : Elements in the same vertical column have similar properties.
Reason (R) : Elements have periodic dependence upon the atomic number.

(b) Both A and R are true but R is not the correct explanation of A.


Q.9. Assertion (A) : Fluorine has greater atomic radius than nitrogen.
Reason (R): Atomic radius decreases along a period.

(d) Assertion is false but reason is true


Q.10. Assertion (A): Li, Na, K form Döbereiner’s triads.
Reason (R) : Atomic mass of Na is roughly the average of atomic masses of Li and K.

(a) Both A and R are true and R is the correct explanation of A.


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