-
Which of the following is not a way to prevent resuting a) Painting the Iron b) Galvanization of the Iron c) Proper solidification of molten Iron d) Chemical treatment of the Iron Your Answer c Correct Answer a Your Score-1 H ...
-
Why do elements like iron, nitrogen, phosphorus or copper have variable valencies? Thanks to the person who can help me in advance. Thanks, Bye, Angikar ...
-
http://www.chacha.com/question/is-lead-hydroxide-amphoteric claims lead hydroxide to be amphoteric. So, what prevents it from reacting with the base ammonium hydroxide? Thanx in advance... ...
-
Can two electrons in the same orbital of the same sub-shell of the same energy state have the same energy? Or does different spin affect the energy of an electron?? ...
-
What is thermal De-Broglie wavelength??? Please give a simple explanation. ...
-
to get pure aluminium we use the process "electrolysis refining" or hoope's electrolysis....can some1 plain it to me...its quite confusing.... ...
-
What is the core difference between "brazing" and "soldering"..??? They are almost the same processes... ...
-
As far as I know, we ourselves are electromagnetic radiations with extremely high frequency. Also, the penetration power of an EM radiation increases with its frequency, right. So, why cant we pass through an aluminium foil? ...
-
why is it said that a better and uniform crystallisation is obtained if a crystal is already placed in the solution,which when cooled crystallises and deposits on the crystal....???is it due to cohesion or something???please ...
-
what is the difference between "Hydrogen Bond" and "covalent Bond"...???....like water is a hydrogen bond but not a covalent bond.... ...
-
What is PET in pet bottles ? Pet as in animal,because the bottle is easy to carry Poly ethene three Poly ethene Tetrapthalate None of thse Your Answer c Correct Answer b HOW IT IS POSSIBLE? ...
-
Which is not related with silk industry sericulture moriculture apiculture reeling Your Answer c Correct Answer d HOW IT IS POSSIBLE WHEN REELING IS RELATED TO SILK INDUSTRY? ...
-
An aqueous solution of salt (A) gives a white precipitate (B) with NaCl solution. The filtrate gives a black precipitate (C) when H2S is passed into it. Compound (B) dissolves in hot water and the solution gives a yellow prec ...
-
Which of the following substances is a strong electrolyte? ...
-
Which among the following anion is more stable ...
-
The chemical formula for Brown Ring test for nitrate ion is ...
-
Which of the following statements regarding the extraction of metals is incorrect? ...
-
Which of the following statements regarding hydrogen chloride gas is correct? ...
-
A salt reacting with dil. H2SO4 gives a reddish brown gas. The salt is ...
-
In the electrolysis of dil. Copper sulphate what are the ions that discharge in the electrodes? ...
-
In anodization of aluminium the anode is ...
-
The head of the safety match contains a mixture of ...
-
Which of the following alternatives does not mention a condition required for electrolysis? ...
-
Siderite is an ore of ______. ...
-
An observer 1.5m tall is 20.5m away from a tower 22m high. Determine the angle of elevation of the top of the tower from the eye of the obseserver. ...
-
A pole 12 m high casts a shadow 4 √3 m long on the ground. Find the angle of elevation. ...
-
Calculate the oxidation number of Sulphur in Sulphuric acid ,Sulphurous acid,Hydrogen Sulphide ...
-
How would you distinguish between a sample of Sodium Chloride solution and sodium sulphate solution. ...
-
Which of these is expected to have the strongest Congugate base? ...
-
Which of these do not follow the octet rule ? ...