|
Name the electric device that converts mechanical energy into electrical energy
|
|
1
|
1235
|
April 5, 2019
|
|
Why is there a need to harness non-conventional sources of energy? Give two main reasons
|
|
1
|
810
|
April 5, 2019
|
|
An object of height 1.2 m is placed before a concave mirror of focal length 20 cm
|
|
1
|
9083
|
April 5, 2019
|
|
An element 'X' has mass number 35 and the number of neutrons, is 18
|
|
1
|
948
|
April 5, 2019
|
|
1. In which direction does he move the lens to focus the flame on the screen?
|
|
1
|
3881
|
April 5, 2019
|
|
Mention the essential material (chemicals) to prepare soap in the laboratory
|
|
1
|
1063
|
April 5, 2019
|
|
In the experimental set up for determination of resistance of a given resistor
|
|
1
|
527
|
April 5, 2019
|
|
A Zinc granule changes the colour of ferrous sulphate and an iron nail changes the blue colour of copper sulphate
|
|
1
|
1455
|
April 5, 2019
|
|
With the help of labelled diagram, discuss the mechanism of respiration in human beings
|
|
1
|
10892
|
April 5, 2019
|
|
Explain the given reactions with the examples: 1. Hydrogenation reaction
|
|
1
|
2389
|
April 5, 2019
|
|
1. How do we classify elements?
|
|
1
|
475
|
April 5, 2019
|
|
Give the steps involved in the extraction of metals of low and medium reactivity
|
|
1
|
6614
|
April 5, 2019
|
|
What are the different methods of contraception?
|
|
1
|
4052
|
April 5, 2019
|
|
1. How can you contribute as an individual or make a difference to the management of:
|
|
1
|
1503
|
April 5, 2019
|
|
Energy from various sources is considered to have been derived from the Sun. Do you agree?
|
|
1
|
602
|
April 5, 2019
|
|
What does the direction of thumb indicate in the right-hand thumb rule?
|
|
1
|
1656
|
April 5, 2019
|
|
Two lamps, one rated 40 W at 220 V and the other 60 W at 220 V, are connected in parallel
|
|
1
|
1793
|
April 5, 2019
|
|
A 14 year old student is not able to see clearly the question’s 1. Name the defect of vision he is suffering from?
|
|
1
|
2625
|
April 5, 2019
|
|
Name the four parts labelled as a, b, c and d in given diagram and write their functions
|
|
1
|
2600
|
April 5, 2019
|
|
What are tropic movements? Name the types of tropic movements in plants
|
|
1
|
1101
|
April 5, 2019
|
|
What are the differences between the transport of materials in xylem and phloem?
|
|
1
|
5715
|
April 5, 2019
|
|
Using this table, explain why 1. Li and Na are considered as active metals
|
|
1
|
5110
|
April 5, 2019
|
|
A substance ‘X’ used in the kitchen for making tasty pakoras and is also an ingredient of antacid
|
|
1
|
6413
|
April 5, 2019
|
|
An old person is unable to see clearly nearby objects. (a) What defect of vision is he suffering from?
|
|
1
|
3635
|
April 5, 2019
|
|
Plot a graph between current (I) and potential difference (V) and determine the resistance (R) of the resistor
|
|
1
|
5340
|
April 5, 2019
|
|
An object of height 4.0 cm is placed at a distance of 30 cm form the optical centre
|
|
1
|
8774
|
April 5, 2019
|
|
Draw diagrams of what he observes (in proper squence)
|
|
1
|
511
|
April 5, 2019
|
|
List the steps of preparation of temporary mount of a leaf peel to observe stomata
|
|
1
|
5380
|
April 5, 2019
|
|
When a solution of sodium sulphate is added to a solution of barium chloride taken in a test tube?
|
|
1
|
1046
|
April 5, 2019
|
|
A student added few pieces of aluminium metal to two test tubes A and B containing aqueous solutions
|
|
1
|
1476
|
April 5, 2019
|