direct method versus indirect method

= 29.75 Calculate the mean of the question in example 4 by Short-Cut Method...

First, the data of concentrations versus time is obtained by a suitable method. Then, the data is plotted as concentration versus time. From the resulting plot, the instantaneous rates are determined by drawing tangents to curve and then calculating their slopes. The r..

Preparation by Direct Combination with Oxygen - Some bases can be prepared by the direct combination of a metal with oxygen. For e.g., Metal + Oxygen Basic oxi..

When metals are required in a ultra pure state, the zone refining method is used. The principle-employed states that the impurities, which lower the melting point of a metal remain preferentially dissolved in the liquid phase and purer metal will emerge in the solid phase. In actual prac..

It is the shortest distance between two ends of the body. For measuring lengths, two methods can be employed, namely direct method and indirect method. Direct methods are employed for measuring small lengths by comparing such len..

It is the shortest distance between two ends of the body. For measuring lengths, two methods can be employed, namely direct method and indirect method. Direct methods are employed for measuring small lengths by comparing su..

Cell mediated immunity is carried out by a subgroup of T cells and T cytotoxic cells. T cytotoxic cell kills the target cell, which is infected, by a variety of mechanisms. These T cells can destroy antigens directly by releasing cytotoxic substances and indirectly by attractin..

Mean is the arithmetic average. To find mean of ungrouped data and it is obtained by adding the raw scores and dividing the sum by the number of items. There are three methods to find mean for a frequency distribution. (i) Direct method, (ii) Short-cu..

Non-renewable or conventional energy resources. Most of the energy, which people are using, is derived directly or indirectly from the sun. Non-renewable energy resources are those, which have been in use since a long time. Availability of petroleum is limited. Petroleum produ..

General Preparation: - By direct combination - By Reaction of metals / metal oxides / hydroxides / carbonates / bicarbonates / metal sulphides with acids. - By precipitation of insoluble salts. - By reaction of acidic oxides with alkali. In the laboratory, salts can be prepared by di..