KERALA PSC / ORGANIC CHEMISTRY/MCQS AND EXPLANATION/TOP 100 MCQS

[00:00:00]hello everyone welcome to boty bun organic chemistry some basic principles the number of Sigma and P Bonds in pend 2 and4 I formul ch3 CH double bond CH C triple bond ch single organic chemistry some basic principles the number of Sigma and Pi Bonds in pend 2 and4 ion formula ch3 CH double bond CH C triple bond CH single Bond find the hybridization of in but 1 n 3 ch2 double bond CH Bond C triple carbon SP2 carbon SP2 carbon SP carbon SP the name of the compound ch3 CH double bond C triple 1 2 3 4 dou B okay in the which of the following functional group is is not possible f fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils a suitable method for extraction of these oils from the flower is Steam distillation and steam distillation it is a separation process which purifies isolate temperature sensitive material such as natural aromatic compounds during hearing of a Cod case the judge suspected that some changes in the documents had been carried out docents he asked the forensic Department to check the in used at different places dep can be the best results chy graphy the thin layer chromatography is where mixture components are separated between a fixed stationary phase and a mobile liquid phase by differential affinities between two faces the principle involved in paper chromatography is Dash the paper chromatography is a type of partition chromatography based on continuous different itial partioning of compounds of a mixture between stationary face and a mobile face paper chromat simple distillation helps in separating a mixture of propen one and prop 2 simple dis prop prop 2 volume 97° vol 56° simple in an organic compound can be estimated quantitively by which method car method a non mass of sulfur present in a compound is treated with with silver nitrate and is heated then the organic compound is converted to sulfuric acid which reacts with excess barium chloride solution and produce a precipitate of barium sulfate in the estimation of by car method 480 G of organic compound gives 699 32 by 32 at by 233 into weight of barium sulfate by weight of organic compound into 100 32 into 699 weight of ber sulfate into 100 divided by 233 into 48 comping in the compound isage hydrocarbons conversion of CH4 methane to ch3 CL chloro methane is an example of which reaction free radical substitution free radical hogen of alkanes is a substitution of a s single hydrogen on alkane for a single hallogen to form hallo alkanes okay okay question which of the following alkane cannot be made in good yielded by Woods rea action options n hetin ninee n hexine 23 dith buttine which of the following acids cannot be prepared by Gard reagent acetic acid suic acid formic acid all of these formic carboxilic acids are prepared by the reaction of grard reagent with carbon dioxide formic acid HC has only one carbon atom so formic acid cannot be prepared from gnot reagent what are the main component of biog gas and natural gas biogas comp okay biogas contains methane as the main component carbon dioxide and a variety of impurities by which process eane can be obtained from hexane lar2 h64 okay C6 H4 splits up or cracks into C3 H6 C2 H4 and CH4 which of the following substances is not an aromatic compound andx conjugated R system number of electrons 4 okay re agent Luc Lucas test is used to distinguish between primary alcohol secondary Al luuc re anhydr chloride concentrated HCl luuc agent which gas is produced when alcohol react with sodium alcohols react with sodium leading to the evolution of hydrogen okay sodium na will give sodium oxide plus hydrogen gas hyrogen gas which of the following reagent does not react with both acetone and balide acetone Ketone alide okay sodium hydrogen sulfate phen hydren fing solution Gard reagent alide does not give failing solution okay Alid K Al okay Alid such as balide lack Alpha hydrogens and cannot form an enolate and thus do not give a positive dest withing solution which of the following compound has more in point than Ketone alol Al alide e alohar carboxilic acid P alcohol amines Ketone alide ether Hydro alenes hydrocarbon the portion chemistry in everyday life foral chemist the classification of medications based on which is most useful medications effect molecular Target chemical structure drug action most useful Tech okay medicinal chemists are interested in the site where a drug will take effect and they prescribe specific drugs to People based on their needs this also includes a structure based mechanism of faral acting on target which of the following medications is not classified according to pharmacological effect criteria okay anep antihistamine anti pharmacological effects of medications are a group of drugs that all have the same effect on a specific sort of problem analgesics relieve pain antiseptic in inhibit the spread of bacteria and antipyretic eight help to reduce body temperature during a fever anti answer drugs that prevent an enzymes binding site from a substract are known Inhibitors enzyme Inhibitors are drugs that either hints the enzyme from retaining the substract or from delivering functional group that attack the substract enzymes catalytic activity is inhibited by these substances drugs that prevent an enzymes binding site from a subtract is known as inhibitor okay n which of the following occurs when the enzyme and the inhibiting medication have a strong bond en strong bond okay the active site slowly regains it original shape the body synthesizes a new enzyme the enzyme is blocked temporarily the enzyme develops a new active site answer the body synesis a new enzyme when the enzyme and the medicine form a strong calent linkage the enzyme is permanently inhibited then and a drug enzyme complex is degradated and a new enzyme is synthesis as a result inhibiting medicine which of the following is not a factor in receptor selectivity for Messengers not receptor shape of binding site location in the membrane amino acid composition structure shape of specific location in okay there are many distin types of receptors in the body all of which are located in different places they communicate with a variety of chemical signs signals their preference for One messenger over over the other is due to difference in binding sides structure and amino acid composition location membrane okay which of the following chemical AIDS in the regulation of stomach pepsin and hydrochloric acid secreted in the stomach also known as R also known as sandas L block hisam from interacting with stomach walls receptors resulting in less acid being released also as s also known as okay which of the following should never be used to treat people directly anep ANS disinfectants antibio disinfectants okay antimalarials and antibiotics are taken orally in pill form antiseptics are used to treat the skin disinfectants are used to disinfect and protect items such as floors toilets and drains from pathogenic activity directly contact okay which of the following is a preservative and which is not synth sweetening agent okay sodium sodium type of soap is generated when soap is dissolved in ethanol alcohol and then Surplus solvent is evaporated shaving Soo floating Soo transparent Soo laundry Soo laundry laap when soap is dissolved in andus solvent is evapor the transparent soap example a transparent soap is created by dissolving the soap in an ethanol solution while manufacturing it and then evaporating the excess ethanol not used in the process choose the cic deterent from the list below DET non detol monate sodium doil sulfate Cil trial ammonium bromide sodium Laural bromine is the an of CLE triy ammonium bromide salt C the cic compound AIDS in washing process non P okayi sodium laf examp biomolecules AAC is formed when two monosaccharides are bonded together by which bondage phos Lage when two monac units come together they prod a molecule of water and form oxide bond this is known as G oxidic linkage okay it is a bond formed by an oxygen atom between two monac molecules Monaco [Music] Lage Lage sucrose is a dash chemical and hyro hdis products combination is in dash nature C6 h12 sorry h221 of fructose is larger than that of glucose okay c222 c626 specific rotation of fructose is larger than that of glucose okay which of the following statements about malos is incorrect it consist of two glucos units sh it is a d glyos b between C1 of one unit and C4 of another unit last it is a non reducing sugar Mal reducing sugar free alide group which has reducing capacity capabilities can be formed at the C1 carbon of second D glucose unit in the solution as a result it is a decreasing sugar M reducing sugar which of the following statements about starch is incorrect it gives blue color with is a glucose it is a reducing carbonate carbohydrate St is ring reducing okay it consist of bran chains yes okay starch is a non reducing carbohydrate because it does not decrease fing solution or tolerance reagent star is a non-reducing saccharide this means that all Hemi acetel Hydrox groups of glucose units are linked by glyos bonds are they are not free simple RNA lacks which nitrogen base th CTO Ur okay RNA contains the pyramid in whereas DNA contains thamin in RNA adinin forms two hydrogen bonds with urasil lysin is an example of polar amino acid but uncharged amino acid okay which of the following chemical classes does not belong to the vast group of carbohy hydrate option A polyhydroxy ketones polyal alides poly amino alides polyhydroxy carboxilic acid answer polyhydroxy Ketone poo po hyrox carroy the group is absent from poly Amino and poly alide there is no CH Al CH bondet group in polyhydroxy carox a okay then are hydrolized they do not form o substituted compounds polyhydroxy which of the following statements about metabolism is false it is due to this process that biomolecules do not have a turn over do not do it involves the formation of biomolecules it involves the breaking down of biomolecules it involves various chemical reactions metabolism entails the breakdown of biomolecules as well as the creation of new biomolecules it entails a number of chemical process it is in charge of biomolecule turn it is due to this process biom molecules do have a turnover how can we make an amine from an amino acid Amal of ammonia addition of ammonia removal of carbon dioxide removal of of carbon dioxide the elimination of a molecule of carbon dioxide transforms an amino acid into an Amin nh2 this is an example of metabolic reaction that involves the conversion of one biom into another C C signing off thank you