Recent questions tagged class 8

When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates

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Trees help in reducing the pollution of our environment. Lakhs of trees are planted by people in the month of July every year. The occasion is called

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1 answer

Choose the correct statement about inflammable substances from the following. They have:

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Which non metal is essential for our life and inhale during breathing?

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The fibres manufacture by petrochemicals are

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Smog =

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Carbon monoxide in vehicle exhaust causes

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The presence of which of the following salts in water causes corrosion in steam boilers ?

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During electrolysis of water, oxygen gas is deposited at which electrode?

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Generally metallic oxides are basic and non-metallic oxides are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red?

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Which of the following groups contain all synthetic substances?

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The lowest level of organization of life is

asked Aug 28, 2017 by priyanka.c

1 answer

The biosphere consists of extensive network of inter connected

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Nitrogen is never a part of

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Adolescence results in an individual

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Identify the ductless gland

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After fertilization, the resulting cell that gives rise to new individual is the

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Animals exhibiting external fertilization produce a large of gametes. Why?

asked Aug 28, 2017 by priyanka.c

1 answer

Green colour of the leaves is due to the pigment

asked Aug 28, 2017 by priyanka.c

1 answer

Read the different combination of terms given below A. Cell wall, cell membrane, nucleus, plastid B. Cell wall, nucleus, ribosomes, chromosomes C. Cell membrane, mitochondria, ribosomes, chromosome D. Cell membrane, ribosome, mitochondria, chloroplast

asked Aug 28, 2017 by priyanka.c

1 answer

In our country, large patches of forests are being cleared for cultivation of crops. The environmental impact of such a practice will lead to

asked Aug 28, 2017 by priyanka.c

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Migratory birds fly to far away areas during a particular time of the year. Which of the following condition present in their habitat during that time are responsible for this? i. Unavailable of food ii. Extreme weather conditions iii. Over crowding iv. Lack of nesting areas

asked Aug 28, 2017 by priyanka.c

1 answer

Microbe responsible for bread spoilage is

asked Aug 28, 2017 by priyanka.c

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Which of the following is found in the curd?

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1 answer

Cod liver from fish is found to be rich in

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1 answer

The milch animal among the following is

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1 answer

Endocrine glands release their secretions

asked Aug 28, 2017 by priyanka.c

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In sexual reproduction, number of parents needed are

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The unit of measurement used fr expressing dimension of a cell is

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The thyroid gland secretes the hormone

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1 answer

In males, the hormone that develops male sexual characters are

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Aquatic animals in which fertilization occurs in water are said to be

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In human beings, after fertilization the structure that gets embedded in the uterine wall is

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Choose the correct statement

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Jelly like substance present in cells is called

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1 answer

The red data book keeps a record of all i. Endemic species ii. Extinct species iii. Endangered species iv. Endangered animals

asked Aug 28, 2017 by priyanka.c

1 answer

Identify the correct statement w.r.t wild life sanctuary.

asked Aug 28, 2017 by priyanka.c

1 answer

Low temperature prevents spoilage of food because it

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1 answer

Malaria is caused by a

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The one that is used as a biofuel is

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1 answer

By using seed drills, seeds are sowed at

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The changes that occur to desertification is

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A disease in human beings caused by virus is

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Identify the bacterial disease in plant

asked Aug 28, 2017 by priyanka.c

1 answer

From the terms given below, select the pair related to inheritance of characters

asked Aug 28, 2017 by priyanka.c

2 answers

The pair of *** chromosomes seen in human male is

asked Aug 28, 2017 by priyanka.c

1 answer

What compound is a common component of air pollution, but is essential in the upper atmosphere to protect life on earth?

asked Aug 28, 2017 by meena.p

1 answer

Shyam’s uncle has set up an electroplating factory near his village. He should dispose off the waste of the factory

asked Aug 28, 2017 by meena.p

1 answer

Adrenal glands secrete

asked Aug 28, 2017 by priyanka.c

1 answer

When a copper vessel is exposed to moist air for long, it acquires a dull green coating. The green material is a mixture of

asked Aug 28, 2017 by meena.p

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