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Q. Show the Occurrence of Metals? Earth's crust and sea are the two main sources of metals. In the earth's crust metals occur both in the combined state in the form of minerals
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
What are Cell diagrams? Consider the galvanic cell depicted in Figure. This cell has a hydrogen electrode at the left and a silver-silver chloride electrode at the right. The h
A solution is made by dissolving30 g of a non-volatile solute in 90 g of water. It has a vapour pressure of 2.8 kPa at 298 K. At 298 K, vapour pressure of pure water is 3.64 kPa
Explain thiols Because of the element effect, both thiols (the compounds with -SH groups) are more acidic than ethanol (CH 3 CH 2 OH). The compound ClCH 2 CH 2 SH is the more
What are different applications in which piezoelectricity is used Applications- Piezoelectric materials serve as a source of ultrasonic waves. At sea, they may be used to mea
(a) Explain in terms of ionic equilibria why the aqueous solution of a salt derived from a weak acid and a strong base (e.g. sodium phenolate) has a pH greater than 7. (b) B
According to Collision theory a chemical reaction takes place due to collision between the particles of these reactants. The number of reacting species (atoms, ions or molecules) w
Removing of permanent hardness from water
50ml of 0.1M NH 4 OH ,25ml NH 4 Cl weere used to make a buffer . what is the PH is if Pk b is 4.8? Solution) The given buffer is a base buffer [NH4OH] =[(50*0.1)/75] [NH4Cl] =[(
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