often used method

Fractional distillation in a fractionating colum..

Example for Method 2: Solve 14 + 2 - 16 2 3 4 Need to find LCM of all the denominators of fractional terms For 2, 3 and 4 LCM is, 2 |2, 3, 4 -------- 1, 3, 2 = 2 x 3 x 2 = 12 is the least common multiple of 2, 3 and 4 = 14 x 6 + 2 x 4 - 16 x 3 12 = ..

- Find LCM of the following numbers by prime factor method. 1) 10,16 2) 150,140,210 3) 96,1..

. When it is at rest, on placing the vibrating tuning fork on the sound box, the paper rider is found to vibrate vigorously and may be thrown off. The resonating length AC = L is measured using a metre scale. The experiment is repeated by gradually increasing the load W 2 in steps of 1Kgw..

Which of the following methods would you use to check the answer for 108115 ÷ 5 = 21623? => 108115 / 21623 or 21623 / 5 or 5 × 108115 or 21623 × 5..

What sampling method is used if the Department of Agriculture wishes to investigate the use of pesticides by farmers in a country? => systematic or stratified or random or cluster..

What sampling method is used to determine the nature of the visit of subjects to a local mall in a city? => cluster or systematic or convenience or stratified..

What sampling method is used if a farmer wishes to work out the average milk yield of each cow in his herd which consists of Ayrshire, Friesian, Galloway and Jersey cows? => cluster or random or stratified or systematic..

Volumetric method is used for determining the molecular masses of acid and bases. In this method, a known mass of the acid is dissolved in water or neutral alcohol, and the solution is titrated against a standard solution of an alkali using phenolphthalein a..

This method is used when the melting temperature of the metal is lower than that of the impurity and the impurities are not miscible with the metal. Metals like Bi, Sn, Pb, Hg etc., are purified by this method. The sloping floor of a reverberatory furnace is used..