Choose the correct option from the bracket and explain the statement giving reason: When electric current is passed through acidulated water ______________of water takes place. (electrolysis , electron,electric)

electrolysis Explanation: Water decomposes into hydrogen and oxygen gases on passing electric current through acidulated water. This decomposition takes place by means of electrical energy. Therefore it is called as electrolysis.

Choose the correct option from the bracket and explain the statem…

When an object of height 3 cm is placed in front of a concave lens, the height of the image is found to be 6 cm. State, giving the reason, whether the given statement is true or false.

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What is the unit of power of a lens? Define it.

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Rules/Act	Year
(1) Forest Conservation Act	(a) 1980
(2) Environmental Conservation Act	(b) 1986
	(c) 2011
	(d) 2000

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DEFINE : Triploblastic animals:

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DEFINE : Fertilization

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Explain why, tungsten is used for making the filaments of electric bulbs.

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To obtain a magnified real image of a small film strip, which type of lens is used? Where is the film strip placed to obtain the image on the screen?

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Select the hydrocarbons which belong to the same homologous series. Give the name of each series.
$CH_4, C_2H_2, C_2H_4, C_2H_6, C_4H_{10}, C_3H_4, C_3H_6.$

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Write down a formula for the magnification produced by a concave mirror.

In terms of height of object and height of image.
In terms of object distance and image distance.

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Find the heat needed to raise the temperature of a piece of iron of mass 500 g by 20 °C. (c = 0.110 cal/g·°C)

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