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Which of the following compounds is ionic:
(1) Kl
(2) CH4
(3) Diamond
(4) H2
Ans: Kl
The Ca 2+ and Mg 2+ ions in hard water form scum with soap. Therefore they don''t form lather and therefore don''t clean the dirt.
Tritium is the isotope of: (1) Hydrogen (2) Oxygen (3) Carbon (4)Sulpher Ans: Hydrogen
1. For what fraction of annual CO 2 emissions from fossil fuel burning are automobiles responsible? 2. A 1000-kg car travels 1.6 × 10 4 km/yr. What is the ratio of the mass of
Which of the following electron transition in a hydrogen atom will require the largest amount of: (1) From n-1 to n=2 (2) From n= 2 to n=3 (3) From n= ∞ to n=
#question.which configuration is more stable,p3 or p6
calculate the voltage of the cell mg/mg+//cd2+/cd at 250c.when[cd2+]=7*10-11 M,[mg2+]=1.0M and standerd electrode potential=1.97V.
Q. Determine the heat transfer? Ans. Let's say a blacksmith tosses a hot horse shoe into a bucket of water. The horseshoe will get cooler while the water gets hotter. Ideally
what is free radical mechanisms
????? # ..
The α -particle scattering experiment of Rutherford concluded that: (1) The nucleus is made up of protons and neutrons (2) The number of electrons is exactly equal to number
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