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The ratio of the energy of a photon of 2000Å wavelength radiation to that of 4000 Å radiation is: (1) 1/4 (2) 4 (3) 1/2 (4) 2 Ans
The mass number of an anion, X 3- is 14. If there are ten electrons in the anion, the number of neutrons in the nucleus of atom, X 2 of the element will be: (1) 10
preparation and structure of xenon fluorides
How many grams of CO2 will be produced from burning 115.5 grams of C4H8 with 310.5 grams of oxygen given the following equation..... C4H8 + 4 O2 = 2 CO2 +4 H2O
how to calculate equivalent weight of LMnO4
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
Q. why is sodium aluminates is a better coagulates then ferrous sulphates or alum? Ans. Sodium aluminates (NaAlO 2 ): It is better coagulant than FeSO 4 and alum because i
algae
A water treatment plant is to process 30,000 m3/d of raw water. A tapered flocculation basin having four flocculators with velocity gradients 40/sec, 30/sec, 20/sec and 10/sec is t
list of minerals with symbol
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