F.A & F.Sc
Who established the negative charge on cathode rays?
It was J.J Thomson who established the negative charge on cathode rays by applying electrical field in discharge tube. The cathode rays were bend towards positive plate. Read More →
Which particle have the same charge as that of electron and 200 times greater in mass?
Meson is a particle which has the charge equal to that of electron and its mass is 200 times greater than that of electron. Read More →
Where will enter the electron when 6d orbital is complete?
The sub shells are arranged according to (n+l) rule and according to Aufbau principle, the electrons should be filled in energy sub-shells in the order of increasing energy values. When 6d orbital is complete, the entering electron will go into 7p. Read More →
Why the ice cubes are unite to form one cube if they pressed over each other?
When two ice cube are pressed, they unite to form one cube. The reason is that the high pressure melts the ice according to Le-chatelier’s principle. The temperature of molten ice drops below “0”.When the pressure is released it freezes again and so the cubes are join each other to... readmore
Where the largest automobile manufacturing center is located?
The largest automobile manufacturing center is located in Tokyo, Japan. Toyota Motor Corporation commonly known simply as Toyota and abbreviated as TMC, is a multinational automaker headquartered in Toyota, Japan. In 2009, Toyota Motor Corporation employed 71,116 people worldwide. TMC is the world’s... readmore
What is the reason that the rate of filtration is greater in fluted filter paper as compared to the cone-shaped filter paper?
The greater surface area of the fluted filter paper gives the chance to the solvent to be filtered. So the rate of filtration is better than in con-shaped filter paper. Read More →
By which of the following techniques NaCl and sand can be separated?
Sand and NaCl are solids. The mixture is dissolved in water. Sand remains undissolved. Filtration is done and NaCl is obtained from the evaporation of filtrate. Read More →
What we get when hot saturated solution is cooled very rapidly?
When hot solution is cooled rapidly , then the ions or the molecules of solute don’t find the proper time to make good crystals. So the premature crystallization of the substance takes place. Read More →
What should the temperature of system at the time of preparation of solution in order to get good crystals?
The temperature of the solution should be sufficiently higher than room temperature so that a reasonable amount of solute should become soluble in the solvent , and that could be crystallized upon cooling. Read More →
