what is m chemistry

George Goble was distinguished for his world-record time igniting a barbecue grill - three seconds, using charcoal and liquid oxygen. Frustrated by the 40 minutes it normally took to get the grill going, Goble, a computer engineer, and some of his friends experimented with alternative for..

1. Ostwald's and Walkers dynamic method Used to determine relative lowering of vapour pressure Dry air > Solution bulbs > Solvent bulbs Anhydr.CaCl., bulb] Loss in mass of solution bulb a Ps Loss in mass of solvent bulb aP0-Ps M^fW^/Wj (P0)/(P0-P..

(40periods of 45 minutes duration) Objectives 1. To strengthen the concepts assimilated at the secondary level and develop new concept to provide a sound background for higher studies in chemistry. 2. To equip students to pursue science based professional courses like medicine, en..

10 electrons Si to Pb is small. of Ge and Sn and d 10 P 1 electrons of Pb. C > non-metal 3. Metallic Increases down the group. Atomic size increases and IE Si non-metallic property decreases. ' . Ge > metalloid Sn & Pb > metals 4. Melting point ..

;"> [d] 29. An electric lamp of 40 watts is used for '30 minutes.' The energy consumed by it is equal to a) 72000 J 'b) 70 J c)10J ' d)' 4300 J: [a] 30. A device that converts electrical energy to heat energy is a) Fluorescent lamp ' b) Geyser c) Electric fan d) Loud speaker. [b] 31. IfP is the ele..

Chemistry deals with the composition, structure and properties of matter. It also deals with the transformation of matter from one form to another. Chemistry is The science of the composition, structure, properties and reactions of matter particularly of atoms a..

The number of moles of a solute present per litre of the solution is defined as the molarity, M, of the solution. If'n' moles of the solute are dissolved in ' V' litres of solution, then molarity of the solution. M = n/V moles/litre; but If n = 1 and V ..

to % 5 mol L_1 in 2 hours and reduced from 4 mol L"1 to 1 mol L'1 in 4 hours. The reaction is of (1) first order (2) second order (3) third order (4) zero order 11. Q coulombs of electricity deposits one mole of A1 from a solution of aluminium nitrate. The number of moles of silver that could be de..

> 30. a) For the first order reaction A> products, the initial concentration of A was found to be 9 mole dm3. After 30 minutes, the concentration was reduced to 4.5 mol/dm3. Calculate the time required for 80% completion of the reaction. 4 (Ans : 69.7 minutes) b) The unit of velocity constant of..

34. The ratio of depressions in freezing points for the solutions of 0.1 M urea, 0.1 M KC1 and 0.1 M K 2 SO /( is approximately (1)1:1:1 (2)2:1:3 (3)1:2:3 (4)3:2:1 35. Which of the following liquid pairs shows a negative deviation from Raoult's law? (1) ace..