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The valency of phosphorus in H3 PO4 is:
(1) 2
(2) 5
(3) 4
(4) 1
Ans: 5
#question.What is the balanced equation for the reaction of aluminium nitrate solution and sodium carbonate solution; where aluminium hydroxide is formed.
Oxidation no of fe in fe2o3
Which orbital is dumb-bell shaped : (1) s -orbital (2) p -orbital (3) d -orbital (4)f -orbital Ans: p -orbital
i need complete assignment on it
The electronic configuration of element with atomic number 24 is : (1) 1s 2 2s 2 2p 6 3s 2 3p 6 3d 4 4s 2 (2) 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 (3)
Calculate the molar concentration of the solution essential to obtain the value of 10 molecules per µm2. (For this calculation we suppose that the transfer of the dye molecules fro
What kind of relation is there between them and the force constants of vibration that you have calculated? The enthalpies of vaporization of carbon and silicon are 717 kJmol -1
The device through which chemical energy is converted into electrical energy is known as galvanic cell or electrochemical cell or voltaic cell. In a galvanic cell, a redox reaction
Q. Show the Occurrence of the f-block element? Apart from promethium which is unstable and is found in traces in uranium ores, all the lanthanides usually occur together. Altho
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