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An activated carbon is specially treated carbon which has the property of absorbing and attracting impurities. Which of the following points is / are not among the advantages of activated carbon? A. It minimizes the chlorine demand of treated water B. It accelerates the coagulation C. Its overdose is harmful
What does the term ‘carbon count’ means? 1. A measure of the amount of carbon dioxide you produce through your lifestyle every day. 2. A measure of the amount of carbon present on Earth. 3. A measure of the amount of carbon and carbon dioxide on Earth. Select the correct answer using the code given below.
Which one of the following statements is incorrect ? (a) Every living organism takes C - 14 through carbon. (b) Every living being has the same proportion of carbon 14. (c) After death every living organ throws same percentage of carbon. (d) After 5568 yrs of death half of C - 14 will disappear - which is called as half life of Carbon - 14. (e) The method is used to get chronological evidence of archaeological remain. (f) This method was invented by F.W. Liby. (g) He got Nobel prize in physics for this work.
Which of the following options are correct? 1. Three carbon atom is indicated by 'prop'. 2. Four carbon atom is indicated by 'but'. 3. Seven carbon atom is indicated by 'Hex'. 4. Nine carbon atom is indicated by 'Non'.
Which of the following statement(s) is/are CORRECT? I. Carbon compounds linked by only single bond are called saturated compounds. II. Carbon compounds having double or triple bonds are called unsaturated compounds. III. Saturated carbon compounds are more reactive than unsaturated carbon compounds.
In the following question, the 1st and the last part of the sentence/ passage are numbered 1 and 6. The rest of the sentence/passage is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence/passage and find out which of the four combinations is correct. 1. Global warming is the rise in average surface temperature of the earth globally. P. It is caused by the greenhouse effect of increased level of greenhouse gases. Q. Deforestation also increases carbon dioxide emissions. R. Greenhouse gases include carbon dioxide, CFCs, etc. S. The increasing use of fossil fuels is a major cause of carbon dioxide emission. 6. Carbon dioxide traps heat and causes the greenhouse effect.
Which of the following statements is NOT correct about Carbon and its allotropes? I. Graphite contains delocalized electrons. II. The hybridization state of carbon in fullerene is sp2. III. The number of carbon compounds is very large because carbon is tetravalent.
In industries titanium is hardened through diffusion of carbon. The concentration of carbon at 1mm into the surface of the titanium slab is 0.25kg/m3 and at 3mm the concentration is 0.68kg/m3. The rate at which the carbon is entering into its surface is 1.27*10-9kg/m2.s. calculate the value of diffusion coefficient of carbon.
In the carbonation of a soft drink, the total quantity of carbon dioxide required is the equivalent of 3 volumes of gas to one volume of water at 0⁰C and atmospheric pressure. Calculate (i) the mass fraction and (ii) the mole fraction of the CO2 in the drink, ignoring all components other than CO2 and water. Basis 1 m3 of water = 1000 kg Volume of carbon dioxide added = 3 m3 From the gas equation, pV = nRT 1 x 3 = n x 0.08206 x 273 n = 0.134 mole. Molecular weight of carbon dioxide = 44 And so weight of carbon dioxide added = 0.134 x 44 = 5.9 kg
Combined carbon content in iron and steel is determined by treating the sample with dilute HNO3. So that combined carbon forms a soluble brown nitrated compound, the intensity of which is matched with that of a standard sample of similar composition treated under similar condition. The intensity of color produced is proportional to the carbon content of iron of steel sample. This method of combined carbon determination is called the