ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 The liquid obtained after passing the mixture through filter paper is termed as: Extract Residue Filtrate Sample
2 In CCL4 solvent I3 shows: Blue Color Brown Color Purple Color Pink Color
3 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
4 Chromatography is derived from Greek word 'Khromatos' means: Type writting Printing Color writing Writing
5 In chromatography, the point at which solvent maximum rises called: Solvent front Base line Element Chromatogram
6 The apex angle of the folded filter paper is slightly greater is termed as: 60 degree 30 degree 45 degree 90 degree
7 Which one of the following substances is used to decolourizing agent Abestos Animal charcoal conc. H2SO4 Silica gel
8 Solvent extraction is an unstable,Process and it is controlled by: Alcohol extraction Petrol extraction Phenol extraction Ether extraction
9 Selection of filter paper depends upon sizes of particles to be: Tested <sup>Filtered</sup> Checked All of above
10 Proteins and amino acid can be separated by: Filtration <sup>Sublimation</sup> Chromatography Suction
11 Sintered glass is porous material used for: Absorption Decoration Filtration All of above
12 Gooch crucible is made of: Brass Porcelain Bronze .Gold
13 The sample being analyzed is called: Electrolyte Residue Undue Filtrate
14 Without proper suction,filtration is: Rapid process Fague process Slow process Useless process
15 The filtration process is used to separate solid from: Liquid Gas Solid All of above
16 95% ethanol is called: Rectified other Diesel Rectified spirit Petrol
17 The other name for distribution law is Dispersive law Partition law Avogadro's law separation law
18 The detection of functional group is called: Numerical analysis Qualitative analysis Quantitative analysis Combustion analysis
19 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
20 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
21 Which of the following is not an air N<sub>2</sub> N<sub>2</sub>O NO CO
22 Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere? Fullerences Freons Polyhalogens Ferrocene
23 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
24 Result of ozone hole is Green house effect Global warming Acid rain UV rays reach the earth
25 Photochemical smog is caused by CO CO<sub>2</sub> O<sub>3</sub> NO<sub>2</sub>
26 As it passes into food chain, the concentration of DDT Remains same Decreases Increases Unpredictable
27 Mottling of teeth is due to presence of an element in drinking water Mercury Fluorine Boron Chlorine
28 Water is often treated with chlorine to Increase oxygen content Kill germs Remove hardness Remove suspended particles
29 Environmental pollution affects Biotic components Plants only Man only Biotic and abiotic components of environment
30 Ozone layer of stratosphere requires protection from indiscriminate use of Fungicides, insecticides, bactericides and medicines Aerosols and high flying jets Atomic explosions and industrial wastes Baloons and turbo-prop aeroplanes
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