Home work

2020-04-26 15:23:22

Class 9

Science

1. Explain the laboratory preparation of Nitrogen gas with figure.

2. Explain the laboratory preparation of Oxygen gas.

3. Write down the causes of ozone layer depletion.

4. Calculate the atomic mass of calcium carbonate, sodium hydroxide,calcium hydroxide and sodium carbonate.

 

Class: 9

  • Write a condolence on the death of a political leader to publish in a newspaper.
  • Write a leaflet of an interesting place of your locality including its basic information.
  • Prepare a model of C.V.

 

                                                  Class- 9

  1. If  S.P is Rs 115 and profit is Rs15 , what is the profit percent?
  2. Solve : 5x2 -45x =0
  3. Compute the first and the third quartiles from the table below

Marks

30

40

50

60

70

80

No of Students

4

6

10

12

5

2

                    Class-9

  1. The market price of an article is Rs250  and 10%  discount  is allowed .How much is the discount amount ?
  2. Factorise :   8x4  + 27x .
  3. In  a  group of 250 music lovers , 135 of them like folk songs ,and 150 like modern songs. By drawing a Venn-diagram ,find

i ) How many people like both the songs?

 ii) How many people like only one song?

 

Class-9

        1.  A shopkeeper purchased an electric fan for Rs1560 and sold it at 5% profit.  

          Find his actual profit and selling price of the fan.

        2.   A room is 15 m long, 12 m broad and 5 m high. Find the cost of panting its

           walls and ceiling at Rs40 per sq.m.

       3.   Factorise : x2 – 2(x + y) – y2 .