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Why the current flow is always oppositte in direction to the conventional current direction? Ans) Availability of free electrons and application of potential difference are the c
The set of quantum numbers n= 3, l=0, m=0, s= -1/2 belongs to the element: (1) Mg (2) Na (3) Ne (4) F Ans: Mg
An electron has principal quantum number 3. The number of its (i) sub-shells and (ii) orbitals would be respectively: (1) 3 and 5 (2) 3 and 7 (3) 3 and 9
Why it called p-block elements?
The freezing point of ethylene glycol is -3.2 degree-Celcius. How many grams of ethylene glycol is required in 150 L of water to achieve such temperature?
Q. Use of Reactants in Excess? Ans. Consider a recipe for pancakes that calls for 2 cups of pancake batter mix and 1 cup of water. The result of this recipe is 14 pancakes
Uses of Phenol - Hydrocarbon Phenol is extensively used in industry. The important applications of phenol are (i) Phenol is used as an antiseptic in soaps, lotions and ointm
Q. Determine the frequency of light wave? Ans. The wavelength of red light is 7.0 x 10 -7 m. What is the frequency? c = λv The first thing to remember here is that
Q. What is Entropy? Ans. The strangest thing about entropy is that it is denoted by the letter S. Entropy is the measure of the disorder in a system. A system with low en
Q. What is the Structure of diborane? The structure of diborane is of great interest since it cannot be explained on the basis of simple theories of bonding. As mentioned earli
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