CBSE Class 8 Maths MCQs on Rational Numbers and Their Properties (NCERT Chapter-wise)
CBSE Class 8 Maths MCQs on Rational Numbers and Their Properties
Class: 8
Subject: Mathematics
Chapter 3: A Story of Numbers
Topic: Rational Numbers, Properties, Operations & Number Line
Subject: Mathematics
Chapter 3: A Story of Numbers
Topic: Rational Numbers, Properties, Operations & Number Line
Strictly as per CBSE Curriculum | Based on NCERT | Ideal for CBSE Board Examinations
Q1. Which of the following is a rational number?
Correct Answer: C) 3/5
Explanation: A rational number is in the form p/q where q ≠ 0. 3/5 satisfies this condition.
Explanation: A rational number is in the form p/q where q ≠ 0. 3/5 satisfies this condition.
Q2. The additive identity of rational numbers is:
Correct Answer: B) 0
Explanation: Adding 0 to any rational number leaves it unchanged.
Explanation: Adding 0 to any rational number leaves it unchanged.
Q3. The multiplicative identity is:
Correct Answer: B) 1
Explanation: Any rational number multiplied by 1 remains unchanged.
Explanation: Any rational number multiplied by 1 remains unchanged.
Q4. The reciprocal of -3/4 is:
Correct Answer: B) -4/3
Explanation: Reciprocal means interchange numerator and denominator keeping the sign.
Explanation: Reciprocal means interchange numerator and denominator keeping the sign.
Q5. Rational numbers are closed under:
Correct Answer: D) All of these
Explanation: The result of addition, subtraction, or multiplication of rational numbers is always rational.
Explanation: The result of addition, subtraction, or multiplication of rational numbers is always rational.
Q6. Which property: a + b = b + a?
Correct Answer: C) Commutative
Explanation: Changing order without changing result shows commutative property.
Explanation: Changing order without changing result shows commutative property.
Q7. (2/3 × 4/5) × 1/2 shows:
Correct Answer: A) Associative property
Explanation: Grouping of numbers changes but product remains same.
Explanation: Grouping of numbers changes but product remains same.
Q8. The rational number between 1/2 and 3/4 is:
Correct Answer: A) 2/3
Explanation: 2/3 lies between 0.5 and 0.75.
Explanation: 2/3 lies between 0.5 and 0.75.
Q9. 0 is a rational number because:
Correct Answer: A) 0/1
Explanation: 0 = 0/1, which is of the form p/q.
Explanation: 0 = 0/1, which is of the form p/q.
Q10. -5/7 + 3/7 equals:
Correct Answer: A) -2/7
Explanation: Add numerators since denominators are same.
Explanation: Add numerators since denominators are same.
Q11. (-3/4) × (8/9) equals:
Correct Answer: A) -2/3
Explanation: Multiply numerators and denominators and simplify.
Explanation: Multiply numerators and denominators and simplify.
Q12. Which is NOT a rational number?
Correct Answer: C) √3
Explanation: √3 is irrational.
Explanation: √3 is irrational.
Q13. 4/5 ÷ 2/3 equals:
Correct Answer: C) 6/5
Explanation: Multiply by reciprocal: 4/5 × 3/2 = 12/10 = 6/5.
Explanation: Multiply by reciprocal: 4/5 × 3/2 = 12/10 = 6/5.
Q14. The rational number on left of 0 is:
Correct Answer: B) Negative number
Explanation: All negative numbers lie left of 0 on number line.
Explanation: All negative numbers lie left of 0 on number line.
Q15. Which shows distributive property?
Correct Answer: B) a × (b + c) = ab + ac
Explanation: Multiplication distributes over addition.
Explanation: Multiplication distributes over addition.
Q16. The reciprocal of 1 is:
Correct Answer: B) 1
Explanation: Reciprocal of 1 is 1.
Explanation: Reciprocal of 1 is 1.
Q17. Which rational number is greatest?
Correct Answer: D) 2/5
Explanation: 2/5 = 0.4 which is greatest among options.
Explanation: 2/5 = 0.4 which is greatest among options.
Q18. The product of two negative rational numbers is:
Correct Answer: A) Positive
Explanation: Negative × Negative = Positive.
Explanation: Negative × Negative = Positive.
Q19. 7/8 – 3/8 equals:
Correct Answer: C) Both A and B
Explanation: 4/8 simplifies to 1/2.
Explanation: 4/8 simplifies to 1/2.
Q20. Every integer is:
Correct Answer: A) Rational number
Explanation: Any integer n can be written as n/1.
Explanation: Any integer n can be written as n/1.
