. An element A burns with golden flame in air. It reacts with another element B, atomic number 17 to give a product C. An aqueous solution of product C on electrolysis gives a compound D and liberates hydrogen. Identify A, B, C and D. Also write down the equations...
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December 2022
(a) Tooth enamel is one of the hardest substances in our body. How does it damage due to eating of chocolates and sweets? What should we do to prevent it? (b) What is meant by water of crystallisation in a substance? Give one example.
aak5abhinav
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December 2022
6. (i) Define a universal indicator. Mention its one use. (ii) Solution A gives pink colour when a drop of phenolphthalein indicator is added to it. Solution B gives red colour when a drop of methyl orange is added to it. What type of solutions are A and B and...
aak5abhinav
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December 2022
8. (a) Tooth enamel is one of the hardest substances in our body. How does it damage due to eating of chocolates and sweets? What should we do to prevent it? (b) What is meant by water of crystallisation in a substance? Give one example.
aak5abhinav
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December 2022
A certain tissue in a green plant somehow gets blocked and the leaves wilted. What was the tissue that got blocked? Explain
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December 2022
WHAT IS MEANT BY WATER OF CRYSTALLIZATION IN A SUBSTANCE?GIVE ONE EXAMPLE
aak5abhinav
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December 2022
A certain tissue in a green plant somehow gets blocked and the leaves wilted. What was the tissue that got blocked? Explain
aak5abhinav
Asked:
December 2022
WHAT IS MEANT BY WATER OF CRYSTALLIZATION IN A SUBSTANCE?GIVE ONE EXAMPLE
aak5abhinav
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December 2022
From the given pair of linear equations 3x+ay=50 and 9x-21y=15.Find the value of 'a' for them to be parallel
aak5abhinav
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December 2022
The number of polynomials having zeroes as 4 and 7 is a)2 b)3 c)4 d)more than 4
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December 2022
You are Raghu of Swan Public School, Delhi. You were a witness of a ghastly fire in the market. The firemen showed an exceptional bravery and saved the life of woman who was trapped inside a room on the first floor. Make a diary entry narrating the whole ghastly incident...
aak5abhinav
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December 2022
If x power 4+3x 2 +7 divided 3x+5 then the possible degree of remainder is a)0 b)1 c)2 d)less than 2
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December 2022
Name any one measure adopted by Sri Lanka in 1956 as a part of their majoritarianism policy a)Tamil Eelam b)Buddhist as a official religion c) Civil rights movement d)Educational institutions nationalized
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December 2022
A number when added to its square result is double of square of number then possible numbers are A)0 B)-1 C)2 D) 1
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December 2022
3. A die is thrown twice. What is the probability of (i) 5 will not come up either time (ii) 5 will come up atleast once (iii) Getting a total of 10 (iv) Getting a total of 9 or 11 (v) Getting a sum greater than 9 (vi) Getting a...
aak5abhinav
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December 2022
The angle of elevation of top of a tower from a point 50 m away from the base of the tower is 45 degree the angle of elevation of top of the flag mounted on the tower a 60 degree Find the height of the flag