coagulation
what is the meaning of fourth power of valency of an active ion?
why transation metals show charaterstic colours to the flame?
arrange in order of basicity,pyridine,pipyridineand pyorine
an atom of an element is 10.1 times heavier than the mass of a carbon atom.What is its mass in amu?
Select the right answer of the question. Which is heaviest: (a)25 gm of mercury (b)2 moles of water (c)2 moles of carbon dioxide (d)4 gm atoms of oxygen
parachloroaniline is strong base than paranitroaniline
The methods used for the preparation of phenols are given below: From aryl sulphonic acids
What is the utilization of glacial acetic acid? Briefly describe the uses.
Silicon has three naturally occurring isotopes. 28Si, mass = 27.976927; 29Si, mass = 28.976495; 30Si, mass = 29.973770 and 3.10% abundance. What is the abundance of 28Si?
Why oxidising character of oxoacids of halogens decreases as oxidation number increases?
A 500 gm tooth paste sample has 0.2g fluoride concentration. Determine the concentration of F in terms of ppm level: (a) 250 (b) 200 (c) 400 (d) 1000Answer: (c) F-ions in ppm = (0.2/500) x 106 = 400
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