1. In which direction does he move the lens to focus the flame on the screen?
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1
|
3737
|
April 5, 2019
|
Mention the essential material (chemicals) to prepare soap in the laboratory
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1
|
994
|
April 5, 2019
|
In the experimental set up for determination of resistance of a given resistor
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1
|
474
|
April 5, 2019
|
A Zinc granule changes the colour of ferrous sulphate and an iron nail changes the blue colour of copper sulphate
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1
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1369
|
April 5, 2019
|
With the help of labelled diagram, discuss the mechanism of respiration in human beings
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1
|
10400
|
April 5, 2019
|
Explain the given reactions with the examples: 1. Hydrogenation reaction
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1
|
2318
|
April 5, 2019
|
1. How do we classify elements?
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1
|
434
|
April 5, 2019
|
Give the steps involved in the extraction of metals of low and medium reactivity
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1
|
6466
|
April 5, 2019
|
What are the different methods of contraception?
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1
|
3881
|
April 5, 2019
|
1. How can you contribute as an individual or make a difference to the management of:
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1
|
1460
|
April 5, 2019
|
Energy from various sources is considered to have been derived from the Sun. Do you agree?
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1
|
561
|
April 5, 2019
|
What does the direction of thumb indicate in the right-hand thumb rule?
|
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1
|
1598
|
April 5, 2019
|
Two lamps, one rated 40 W at 220 V and the other 60 W at 220 V, are connected in parallel
|
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1
|
1721
|
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?
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|
1
|
2513
|
April 5, 2019
|
Name the four parts labelled as a, b, c and d in given diagram and write their functions
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1
|
2232
|
April 5, 2019
|
What are tropic movements? Name the types of tropic movements in plants
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1
|
1051
|
April 5, 2019
|
What are the differences between the transport of materials in xylem and phloem?
|
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1
|
5636
|
April 5, 2019
|
Using this table, explain why 1. Li and Na are considered as active metals
|
|
1
|
5042
|
April 5, 2019
|
A substance ‘X’ used in the kitchen for making tasty pakoras and is also an ingredient of antacid
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1
|
5749
|
April 5, 2019
|
An old person is unable to see clearly nearby objects. (a) What defect of vision is he suffering from?
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1
|
3385
|
April 5, 2019
|
Plot a graph between current (I) and potential difference (V) and determine the resistance (R) of the resistor
|
|
1
|
5086
|
April 5, 2019
|
An object of height 4.0 cm is placed at a distance of 30 cm form the optical centre
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1
|
8694
|
April 5, 2019
|
Draw diagrams of what he observes (in proper squence)
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|
1
|
461
|
April 5, 2019
|
List the steps of preparation of temporary mount of a leaf peel to observe stomata
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1
|
5302
|
April 5, 2019
|
When a solution of sodium sulphate is added to a solution of barium chloride taken in a test tube?
|
|
1
|
997
|
April 5, 2019
|
A student added few pieces of aluminium metal to two test tubes A and B containing aqueous solutions
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1
|
1369
|
April 5, 2019
|
Explain the function of the following parts of an electric motor. (i) Armature
|
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1
|
3262
|
April 5, 2019
|
1. Mention any two components of blood
|
|
1
|
3295
|
April 5, 2019
|
(a) Write the steps involved in the extraction of pure metals
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|
1
|
12476
|
April 5, 2019
|
What is a dam? Why do we seek to build large dams?
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|
1
|
1453
|
April 5, 2019
|