PRACTICE QUESTIONS , CLASS - 7

Very short answer type [ Science ]

1. Write the latin name of element iron.
2. What is the chemical symbol of Potassium?
3. What is the chemical symbol of
   (a) Nitrogen
   (b) Neon
   (c) Nickel ?
4. What is the chemical symbol of
   (a) Boron
   (b) Berylium
   (c) Bromine ?
5. Name the elements whose symbols are
   (a) C
   (b) Ca
   (c) Cu.
6. Write the chemical formula of the following radicals.
   (a) Sulphate
   (b) Carbonate
   (c) Nitrate
   (d) Nitrite
7. Write the valencies of the following chemical species.
   (a)zinc
   (b) Barium
   (c) Sodium
   (d) Aluminium
8. Which is an inert gas - Hydrogen , Nitrogen, Argon, Oxygen?
9. What is the chemical formula of Sodium hydroxide?
10. Write the chemical formula of Calcium hydroxide.
11. What is the chemical name of the radical OH^- ?
12. What is the chemical name of the radical NO₃^- ?
13. What is the chemical name of the radical NO₂^- ?
14. Write the chemical name of the radical NH₄⁺.
15. What will be the chemical formula of ammonium chloride ?
16. Write the name of the elements present in the compound Ca(OH)₂.
17. Write the name of the elements present in the compound H₂SO₄.
18. Write the name of elements present in the compound C₆H₁₂O₆.
19. What is the chemical name of the compound KOH ?
20. What is the chemical name of the compound AgOH ?

MATHEMATICS

1. Identify the variables in the algebraic expression 4x³ + 5xy - 2.
2. Identify the constants in the algebraic expression 4x³ + 5xy - 2.
3. How many terms are there in the algebraic expression 4x³ + 5xy - 2?
4. Wrte the coefficient of x³ in the algebraic expression 4x³ + 5xy - 2.
5. What is the name of the algebraic expression which has only one term?
6. What is the name of the algebraic expression which has only two terms?
7. What is the name of the algebraic expression which has only three term?
8. 4x³ + 5xy - 2 is monomial / binomial/ trinomial ?
9. Give an example of binomial algebraic expression.
10. Give an example of trinomial algebraic expression.
11. Show adjacent angles in the figure.
12. Show a linear pair angles in the figure.
13. Show vertically opposite angles in the figure.
14. Give an example of complementary angles.
15. Give an example of supplementary angles.
16. Give an example of acute angle.
17. Give an example of obtuse angle.
18. Give an example of reflex angle.
19. What is the value of a right angle?
20. What is the value of the complete angle?

MATHEMATICS

1. Simplify:-
   (-12) + 15 - (-8) - 7
2. fInd the value of :-
   (-25) x 3 + (-25) x 7
3. Solve :-
   (-36)/ (-9) x 2
4. Add :-
   2/5 + 3/7
5. Subtract :-
   5/6 - 1/3
6. Multiply :-
   (2/3) x (9/4)
7. Divide :-
   (4/5) ÷ (2/10)
8. Convert 3.75 to a fraction.
9. Multiply :- 2.5 x 1.2
10. Divide :- 0.36 ÷ 0.6
11. Solve :
    x + 5 = 12
12. Solve :-
    2y - 3 = 7
13. Solve :-
    3(z+2) = 15
14. The sum of two numbers is 25. One number is 7 more than the other. Find the others.
15. What is the complement of an angle of 35⁰?
16. What is the supplement of an angle of 110⁰?
17. Find the area of a square with side 7 cm.
18. The ratios of boys to girls in a class is 2:3. If there are 20 boys, how many girls are there?
19. If 3kg of sugar costs Rs. 90. What is the cost of 5kg of sugar?
20. Find the perimeter of a rectangle with length 12cm and breadth 8cm.

MATHEMATICS

Q A) Complete the following :-
1. Area of parallelogram = ....
2.Base of parallelogram = ....
3.Height of parallelogram = ...
4.Area of a triangle = ......
5.Base of triangle = ......
6. Height of triangle = ......
7. Area of rectangle = ......
8.length of rectangle = .......
9.Breadth of rectangle = ......
10.Area of square = .......
11.Side of a square = ......
12.Diagonal of a rectangle = .....
13.Diagonal of a square = ......
14.Perimeter of rectangle = .....
15.Perimeter of a square = .....
16.Perimeter of equilateral triangle = ......
17.Area of an equilateral triangle = .......
Q.B) Draw a rectangle and show its diagonal.
Q.C)Draw a parallelogram.
Q.D)Draw a triangle and show the altitudes by three different ways.
Q.E) Find the area of the following.

MATHEMATICS

Q.A) Fill in the blanks.
1. Additive inverse of 3/4 is ......
2. Multiplicative inverse of 2/5 is ......
3. Additive identity of rational number is .....
4. Multiplicative identity of rational number is ....
Q.B). Simplify :-
(a) 10 - 2 (3 - 4) + 8 × (-2)
(b) ½ - ⅔ + ⅖
(c) ⅞(¾ - ⅝) + 2(-1/2)
Q.C) Solve the following equations:-
i) 3y - 1/2 = 3/4
ii) m + 2m - 1/4 = 3/4 -m
iii) 2/3(y-2) + 1/2 = y + 3
iv) 6x - (4-x) +5 = 3x - 5
Q.D) Find x if
i) 2:3 :: x:4
ii) x :10 :: 2:5
Q.E) What will be the complement of each of the following angles?

Q.F) What will be the supplement of each of the following angles?

Q. G) Which pair of the following is complementary?

MATHEMATICS

Q.1) In triangle ABC, name the all vertices, sides and angles.
Q.2) In △PQR, what is the opposite side of vertex P ?
Q.3) In △PQR, what is the opposite side of vertex R ?
Q.4) In △PQR, what is the opposite vertex of side PQ ?
Q.5) In △XYZ, what is the opposite side of ∠X ?
Q.6) What do you mean by a median of a triangle ?
Q.7) Draw a median AD in the △ABC .
Q.8) How many medians are possible in a triangle?
Q.9) Show all medians PX, QY and RZ i the △PQR.
Q.10) Do all medians of a triangle lie interior part of the triangle?
Q.11) What do you mean by an altitude of a triangle ?
Q.12) Draw an altitude AD in the △ABC .
Q.13) How many altitudes are possible in a triangle?
Q.14) Do all altitudes of a triangle lie interior part of the triangle?

Q.15) Write the name of the median and the altitude in the △PQR in following figure.

Q.16) Find the unknown exterior angle x in the  following diagram.

Q.17) Solve the following linear equations.

         (a) 3x - 7 = 12

         (b) 2(x-7) - (5x + 1) = 10

         (c) (2/5)x + 1/2 = 2

Q.18) Evaluate :-

         (a) 2.05 +  4.8 + 0.001

          (b) 1.5 ×   3.3

          (c) 92.37 - 1.8

Q.19) Find the values of the following-

      (i) 4/5  +  2/5 + 1/5 + 3/5

      (ii) 4/5  -  2/5 + 1/5 - 3/5

       (iii) 2/3 + 3/4 - 1/12

Q.20) Convert into mixed fractions :-

       (i) 9/7      (ii)  20/3      (iii) 66/10

Q.21) Define adjacent angles.

Q.22) Define linear pair angles.

Q.23) Define vertically opposite angles.