Classify the following based on number of chambers in their heart. Rohu, Scoliodon, Frog, Salamander, Flying lizard, King Cobra, Crocodile, Ostrich, Pigeon, Bat, Whale.
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December 2022
An atom has mass number 40 and atomic number 20. (i) How many electrons are revolving around the nucleus? (ii) How many electron shells are there in the atom?
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December 2022
A block of ice floats in water such that the temperature of water as well as ice is 00C. In this situation, the weight of ice is equal to the: (a) Weight of water displaced by the immersed part of ice (b) Volume of water displaced by the immersed...
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December 2022
X is a mixture of iron filings and sulphur and Y is a product obtained by heating the mixture X and crushing it to a fine powder. On bringing a magnet over both X and Y Rahul observed that: (a) X and Y both are attracted. (b) X is attracted...
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December 2022
Weeds affect the crop plants by - a. Killing the plants in the field before they grow. b. Dominating the plants to grow. c. Competing for various resources of crops causing low availability of nutrients. d. All of the above.
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December 2022
Give two symptoms of each of the following diseases : (a) Malaria (b) Marasmus (c) Typhoid
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December 2022
The method commonly used in cattle breeding is - a. Controlled breeding b. random mating c. artificial insemination d. embryo transfer.
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December 2022
an object thrown upwards ,rises to height of 10m Calculate velocity with which it was thrown upwards and time taken by an object to reach the highest point.
Why are cutting instruments often sharpened?
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December 2022
Nodules with nitrogen fixing bacteria is present in - a. maize b. cotton c. gram d. rice
Rivers from the land add mineral to sea water. Explain
Author of the book "Gulliver's travels"?
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December 2022
Two bodies A and B of the same mass are moving with velocities v and 5v respectively. Compare their i) inertia ii)momentum iii) force needed to stop them in the same time