A shiny brown colored element ‘x’ on heating in air becomes black in cooler name the element ‘x’and black colored compound formed?

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Question 88 - In the calculation of the growth of bacteria, colony forming unit (CFU) in serial dilution is used. In a laboratory, viable count assay is used to estimate CFU. Formula applied is CFU / mL = (number of colonies x dilution) / (amount plated, in unit mL). Acceptable plate count is either between 20 and 200 or between 30 and 300 according to 2 different references. A wastewater sample of 200 ml is added to and mixed with 1.8 L of sterile water. Another 200 ml of the mixture is added to and mixed with 1.8 L of sterile water. (a) Calculate the dilution of first mixture and the dilution of the second mixture. (b) 100 microlitres of wastewater samples from the first mixture and the second mixture are placed separately on 2 different alga plates. The first plate has 250 colonies and the second plate has 23 colonies. Calculate the average CFU / mL.

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How can one quickly estimate the additional pressure drop to be introduced with more tube passes?

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what is the cast iron grade of composition of c-3.06% , Mn- 0.48% , Si-2.38% , S-0.088% , P-0.092% , Cr-0.12% , Ni- 0.012% , Mo-0.00%

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What is the iodine value of spent carbon?How iodine value is used to determine the power of carbon to adsorb?

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What is the practical particle size limit for pneumatic conveying?

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What is the angle of repose and what are its applications in the chemical industry?

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What is a quick way to calculate frictional pressure drops in carbon steel pipe?

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Explain the difference between cfm (cubic feet per minute) and scfm (standard cubic feet per minute)?

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Difference between Synthetic foaming agents V/S Protien based foaming agent?

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What is an isochoric process?

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is extractive distillationӞH

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