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Factorize the following expressions: 1. a/b + b/c + c/a + a/c + b/a + c/b +3 2. (a2 - b2)(c2 - d2) - 4abcd ...
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An atom of one element A has four elements in its outermost shell, and that of B has six electrons in the outermost shell. The formula of the compound formed by these two will be A2B AB2 A2B3 A3B2 Your Answer d Correct Answer ...
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2)An atom X is represented as follows . The numbers of protons, electrons and neutrons in this atom are: a.21, 21, 24 b.21,21,23 c.20,20,24 d.20,20,23 Your Answer a Correct Answer b Your Score -1 How is that possible? Please ...
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Give reasons why equal volumes of nitrogen and ozone under same conditions of temperature and pressure have different number of atoms. ...
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2)0.001 g of C is required to write a letter with a graphite pencil. The total number of C atoms used in writing the letter is 5 x 1012 5 x 1019 5 x 1024 1 x 1020 Your Answer Not Attempted Correct Answer b please show me the ...
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Is there a specefic ratio or amount of CO and H2 individually in 1 unit mass of Water gas?? Or is it a mixture? ...
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Which oxide of a metal gets reduced only by coke and not by H2 gas or Co gas? a. CuO b. PbO c. Fe2O3 d.ZnO ...
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How much force act on a body whose momentum is constant? a. 0 b. large force c. small force d. none of these ...
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A force produce an acceleration of 2 m/s2 in a body A and 5 m/s2 another body B. Then the ratio of mass of A to the mass of B is a. 1/(2.5) b. 2.5 c. 2/(2.5) d. (3.5)/(2.5) ...
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Meena and Hari observed and animal in their garden. Hari called it an insect while Meena said it was an earthworm. Choose the character from the following which confirms that it is an insect. (a) body rounded (b) body with jo ...
