## MCQ Questions for Class 8 Maths: Ch 9 Algebraic Expressions and Identities

1. Expressions consists of _____________ and _______________.
(a) variables, constants
(b) identities
(c) expressions
(d) none of these
â–º (a) variables, constants

2. Which of the following is an expression?
(a) 1/2
(b) 3
(c) 3x-2
(d) 2
â–º (c) 3x-2

3. The coefficient of x in the expression -7x +5 is
(a) 5
(b) -7
(c) 7
(d) 0
â–º (b) -7

4. The number of terms in the expression 2x2+3x+5 is
(a) 1
(b) 2
(c) 3
(d) 5
â–º (c) 3

5. Like terms in the expression 7x,5x2,7y, -5yx, -9x2, are
(a) 7x, -5yx
(b) 5x2, -5yx
(c) 5x2, -9x2
(d) 7x, 7y
â–º (c) 5x2, -9x2

6. Terms are added to form ___________.
(a) expressions
(b) terms
(c) identities
(d) none of these
â–º (a) expressions

7. Add: 7xy + 5yz â€“ 3zx, 4yz + 9zx â€“ 4y, â€“3xz + 5x â€“ 2xy.
(a) 5xy + 3zx + 5x â€“ 4y
(b) 5xy + 9yz +2zx + 5x â€“ 4y
(c) 5xy + 9yz +3zx + 5x â€“ 4y
(d) 5xy + 9yz +3zx + 4y
â–º (c) 5xy + 9yz +3zx + 5x â€“ 4y

8. The expression x + y + z is in
(a) one variable
(b) no variable
(c) three variables
(d) two variables
â–º (c) three variables

9. Which of the following is a monomial ?
(a) 4xÂ²
(b) a + 6
(c) a + 6 + c
(d) a + b + c + d
â–º (a) 4xÂ²

10. How many terms are there in the expression 5 â€“ 3xy ?
(a) 1
(b) 2
(c) 3
(d) 5
â–º (b) 2

11. How many terms are there in the expression 5xy + 9yz + 3zx + 5x â€“ 4y ?
(a) 1
(b) 3
(c) 4
(d) 5
â–º (d) 5

12. If x = 3 is solution of xÂ² + kx + 15, value of k is
(a) k = -8, x = 3
(b) k = 8, x = 5
(c) k = 6, x = 5
(d) None of above
â–º (a) k = -8, x = 3

13. The coefficient in the term -5x is
(a) 5
(b) -5
(c) 1
(d) 2
â–º (b) -5

14. n (4 + m) = 4n + ___
(a) 4m
(b) 4n
(c) 4mn
(d) nm
â–º (d) nm

15. The like terms of the following are
(a) x, 3x
(b) x, 2y
(c) 2y, 6xy
(d) 3x, 2y
â–º (a) x, 3x

16. Value of expression â€˜a(a2+a +1)+5â€™ for â€˜ aâ€™ = 0 is
(a) a+5
(b) 1
(c) 6
(d) 5
â–º (d) 5

17. Which of the following is like term as 7xy?
(a) 9
(b) 9x
(c) 9y
(d) 9xy
â–º (d) 9xy

18. The area of triangle isâ€™ xyâ€™ whereâ€™ xâ€™ is length and â€˜yâ€™ is breadth. If the length of rectangle is increased by 5 units and breadth is decreased by 3 units, the new area of rectangle will be
(a) (x-y)(x+3)
(b) (xy+15)
(c) (x+5)(y-3)
(d) (xy+5-3)
â–º (c) (x+5)(y-3)

19. The expression 7xy has the factors
(a) 7,x,y
(b) x,y
(c) 7,x
(d) 7,y
â–º (a) 7,x,y

20. Which of the following is a binomial?
(a) 4x + y + 2
(b) 2x + 7
(c) 3x + 4y - 6
(d) 3x
â–º (b) 2x + 7

21. When numbers/literals are added or subtracted, they are called _________.
(a) identities
(b) expressions
(c) variables
(d) terms
â–º (d) terms

22. The volume of rectangular box whose length, breadth and height is 2p,4q.8r respectively is
(a) 14pqr
(b) 2p+4q+8r
(c) 64pqr
(d) 64
â–º (c) 64pqr
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