ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Analytical chemistry is the science of Chemical characterization Physical characterization Biological characterization Biochemical characterization
2 Fluted filter paper is used to: Decrease rate of filtration Increase rate of filtration Maintain rate of filtration None of above
3 Direct conversion of solid intro vapours is called: Crystallization Sublimation Obligation Vapourization
4 The liquid obtained after passing the mixture through filter paper is termed as: Extract Residue Filtrate Sample
5 In CCL4 solvent I3 shows: Blue Color Brown Color Purple Color Pink Color
6 Solvent extraction is an unstable, Process and it is called by: The amount of solute Distribution law The amount of solvent used Law of mass action
7 Chromatography is derived from Greek word 'Khromatos' means: Type writting Printing Color writing Writing
8 In chromatography, the point at which solvent maximum rises called: Solvent front Base line Element Chromatogram
9 The apex angle of the folded filter paper is slightly greater is termed as: 60 degree 30 degree 45 degree 90 degree
10 Which one of the following substances is used to decolourizing agent Abestos Animal charcoal conc. H2SO4 Silica gel
11 Solvent extraction is an unstable,Process and it is controlled by: Alcohol extraction Petrol extraction Phenol extraction Ether extraction
12 Selection of filter paper depends upon sizes of particles to be: Tested <sup>Filtered</sup> Checked All of above
13 Proteins and amino acid can be separated by: Filtration <sup>Sublimation</sup> Chromatography Suction
14 Sintered glass is porous material used for: Absorption Decoration Filtration All of above
15 Gooch crucible is made of: Brass Porcelain Bronze .Gold
16 The sample being analyzed is called: Electrolyte Residue Undue Filtrate
17 Without proper suction,filtration is: Rapid process Fague process Slow process Useless process
18 The filtration process is used to separate solid from: Liquid Gas Solid All of above
19 95% ethanol is called: Rectified other Diesel Rectified spirit Petrol
20 The other name for distribution law is Dispersive law Partition law Avogadro's law separation law
21 The detection of functional group is called: Numerical analysis Qualitative analysis Quantitative analysis Combustion analysis
22 In Antarctica ozone depletion is due to the formation of following compound Acrolein Peroxy acetyl nitrate SO<sub>2</sub>and SO<sub>3</sub> Chlorine nitrate
23 Pick up the correct statement CO which is major pollutant resulting from the combustion of fuels in automobile plays a major role in photochemical smog Classical smog has an oxidizing character while the phtochemical smog is reducing in character Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours During formation of smog the level of ozone in the atmosphere goes down
24 Which of the following is not an air N<sub>2</sub> N<sub>2</sub>O NO CO
25 Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere? Fullerences Freons Polyhalogens Ferrocene
26 When rain is accompanied by a thunderstorm, the collected rain water will have a pH value Uninfluenced by occurrence of thuderstorm Which depends on the amount of dust in air Slightly lower than that of rain water without thunderstorm Slighlty higher than that when the thunderstom is not there
27 Result of ozone hole is Green house effect Global warming Acid rain UV rays reach the earth
28 Photochemical smog is caused by CO CO<sub>2</sub> O<sub>3</sub> NO<sub>2</sub>
29 As it passes into food chain, the concentration of DDT Remains same Decreases Increases Unpredictable
30 Mottling of teeth is due to presence of an element in drinking water Mercury Fluorine Boron Chlorine
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