MCQ
Assertion (A): a × b = b × a is called commutative law for multiplication
Reason (R): Rational numbers are commutative under addition and multiplication
  • A
    Both A and R are true and R is the correct explanation of A
  • 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

Answer

Correct option: B.
Both A and R are true but R is not the correct explanation of A
B

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Assertion (A): A boy runs 1km in 10 minutes. Then He will take 6 minutes to ran 600m.
Reasons (R): A direct proportion shows the direct the relation between two quantities.
Directions: In the following questions, the Assertions $(A)$ and Reason(s) $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following: Observe the following temperature time graph and consider it as reasons for the following assertions:

Assertion (A): The difference of temperatures at $7$ hours and $21$ hours is $1^\circ F$
Directions: In the following questions, the Assertions $(A)$ and Reason(s) $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion (A): The perfect square number out of $2, 3, 4$ and $5$ is $4.$
Reasons (R): A perfect square is a number that can be expressed as the product of an integer by itself or as the second exponent of an integer.
Directions: In the following questions, the Assertions $(A)$ and Reason(s) $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion (A): The measure of each exterior angle of a regular polygon of $9$ sides is $40.$
Reason (R): Quadrilaterals are composed of two triangles. Seeing as we know the sum of the interior angles of a triangle is $180^\circ ,$ it follows that the sum of the interior angles of a quadrilateral is $360^\circ .$
Directions: In the following questions, the Assertions $(A)$ and Reason(s) $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion (A): The linear equation in one variable $x,$ is $\frac{\text{x}}{2}+\frac{\text{x}}{3}+\frac{1}{4}$
Reason (R): Standard form for linear equation in one variable is $ax + b = 0$. where $x$ is variable and a, b are arbitrary constants
Assertion (A): The coefficient in the term 7xy is 7.
Reasons (R): A coefficient is a number multiplied by a variable.
Directions: In the following questions, the Assertions $(A)$ and Reason(s) $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion (A): Triangle have $1$ diagonal.
Reason (R): A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry
Directions: In the following questions, the Assertions $(A)$ and Reason$(s)$ $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion $(A)$: $5$ terms are there in the expression $7x^2+ 5x - 5$
Reasons $(R)$: An algebraic expression consists of a group of terms separated by operators, which are either plus signs or minus signs
Observe the figure as reasons for the following assertions:

Assertion (A): The difference of the number of books of Hindi and Social Science is 300.
Assertion (A): Natural numbers are closed under division
Reason (R): A rational number is a number that is in the form of $\frac{\text{p}}{\text{q}}$ where p and q are integers, and q is not equal to 0.