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Electrovalent compounds are: (1) Good conductor of electricity (2) Polar in nature (3) Low M.P. and low B.P. (4) Easily available Ans: Polar in nature
A sample of water contains: suspended matter = 100 mg; Ca(NO3)2 = 16.4 mg/L; MgSO4 = 24 mg/L; MgCl2 = 19 mg/L; NaOH = 40 mg/L and KOH = 56 mg/L. Calculate temporary, permanent and
how can we identify the ammonical smell and punjent smell?
Test of proteins - Biuret test (i) Biuret test : By adding a dilute solution of copper sulphate to alkaline solution of protein, a violet colour is made. This test is because o
A sample of water collected in the field had a pH of 6.8. By the time it was analyzed in the lab, the pH had decreased to 6.0. Give a possible explanation.
why uranium235 and thorium232 dont participate in nuclear fission
1. Enter the symbol of a sodium ion, Na+, followed by the formula of a sulfate ion, SO42- ..Express your answers as ions separated by a comma. 2.Enter the expression 147N+a, wher
The combustion of propane occurs via the reaction: C3H8(g)+5O2(g)-->3C02(g)+4H2O(g) Hoe many grams of oxygen are required to burn completely 10.0g of propane?
Number of protons, neutrons and electrons in the element 231/89 y is: (1) 89, 231, 89 (2) 89, 89, 242 (3) 89, 142, 89 (4) 89, 71, 89 Ans: 89, 142, 89
Physical properties Alkyl Halides (i) CH 3 F,CH 3 Cl, CH 3 Br and C 2 H 5 Cl are gases at room temperature. The alkyl halides up to be colourless liquids whereas higher members
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