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Recent questions tagged cbsc

Filtration as a method of separation can be used for mixtures that are

asked Aug 29, 2017 by meena.p

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A chemistry poster indicated information on the number of particles in a newly discovered atom. According to the information in the poster the atomic number is: Protons: 113 Electrons: 113 Neutrons: 281

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When a bottle of soda water is opened, carbon dioxide escapes, producing a fizz. This is due to:

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Which of the following has minimum spaces among the particles

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On contact with oxygen, Rubidium forms

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Nitrous oxide, commonly called laughing gas, has been a matter of concern to environmentalists recently because

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The word atom is from a Greek word meaning:

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Which of the following alloys is used for making magnets ?

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Polythene and PVC are examples of

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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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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?

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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 <br> A. Cell wall, cell membrane, nucleus, plastid <br> B. Cell wall, nucleus, ribosomes, chromosomes <br> C. Cell membrane, mitochondria, ribosomes, chromosome <br> 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. <br> Which of the following condition present in their habitat during that time are responsible for this? <br> i. Unavailable of food <br> ii. Extreme weather conditions <br> iii. Over crowding <br> iv. Lack of nesting areas

asked Aug 28, 2017 by priyanka.c

1 answer

Microbe responsible for bread spoilage is

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Which of the following is found in the curd?

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Cod liver from fish is found to be rich in

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The milch animal among the following is

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Endocrine glands release their secretions

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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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Which of the following gland secretes bile?

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

asked Aug 28, 2017 by priyanka.c

1 answer

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

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Low temperature prevents spoilage of food because it

asked Aug 28, 2017 by priyanka.c

1 answer

Malaria is caused by a

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The one that is used as a biofuel is

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