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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statements is not ture:A. Disinfectants harm the living tissuseB. A 0.2% solution of phenol is an antiseptic while 1% solution acts as a disinfectantC. Chlorine and iodine are used as strong disinfectantsD. Dilute solutions of boric acid and hydrogen peroxide are strong antiseptics |
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Answer» Correct Answer - C Iodine (in the form of its solution in alcohol) is used as an antiseptic. |
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| 52. |
Which fo the following would undergo dehydration most readily?A. 1 - Pheny 1-1-butanolB. 2- phenyl 1-2 butanolC. 1- Phenyl 1-2 -butanolD. 2 - Phenyl -1- butanol |
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Answer» Correct Answer - B Because in this case, the carbonium ion formed is stabilised by the benzene ring. |
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| 53. |
The aldehyde which will not reduce Fehling solution readily isA. EthanalB. BenzaldehydeC. PhenylacetaldehydeD. Formaldehyde |
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Answer» Correct Answer - B Bezaldehyde does not reduce Fehling solution readily |
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| 54. |
Which of the following statement is not correct?A. Allergic conditious are cured by antihistaminesB. Hormones are contnuously produced but not stored in the bodyC. The functions of the white blood cells is to protect the body against infectionsD. Catabolism involves degradation of molecules. |
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Answer» Correct Answer - B Hormones are not continously produced, rather they are produced in a controlled manner according to the requirement of the body. |
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| 55. |
Biliquid propellant containsA. Mixture of liquid oxidiserB. a solid rocket fuelC. A liquid fuel which can act as an oxidiser as wellD. A mixture of liquid fuel and liquid oxidiser |
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Answer» Correct Answer - D Biliquid propellant contains a mixture of liquid fuel and liquid oxidiser. |
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| 56. |
Benzaldehyde reacts with ethanolic KCN to giveA. `C_(6)H_(5)CHOHCN`B. `C_(6)H_(5)CHOHCO OH`C. `C_(6)H_(5)CHOH CO C_(6)H_(5)`D. `C_(6)H_(5)COCOC_(6)H_(5+)`. |
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Answer» Correct Answer - C Benzoin condensation `C_(6)H_(5)-overset(O)overset(||)underset(H)underset(|)(C) + overset(O)overset(||)underset(H)underset(|)(C) -C_(6)H_(5) overset(KCN)to C_(6)H_(5)-overset(O)overset(||)(C)-overset(H)overset(|)underset(OH)underset(|)(C)-C_(6)H_(5)` |
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| 57. |
10% solution of phenol is used as aA. AntisepticB. DisinfectantC. BothD. None |
| Answer» Correct Answer - B | |
| 58. |
Among phenol (I), o-nitrophenol (II), p-nitrophenol (III),m-nitrophenol (IV), the correct order of decreasing acid strength isA. IIIgtIIgtIVgtIB. IgtIIgtIIIgtIVC. IIIgtIVgtIgtIID. IVgtIIIgtIIgtI |
| Answer» Correct Answer - A | |
| 59. |
The rate of `S_N^1` reaction is fastest in the hydrolysis of which of the following halides?A. `C_(6)H_(5)CH_(2)Br`B. `CH_(3)Br`C. `(CH_(3))_(2)CHBr`D. `(CH_(3))_(2)CBr` |
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Answer» Correct Answer - A Because of the formation of most stable carbonium ion `C_(6)H_(5)-overset(o+)(C)H_(2)`. |
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| 60. |
The use of chemicals for treatment of diseases is called as :A. HomoeotherapyB. IsothermotherapyC. AngiotherapyD. Chemotherapy |
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Answer» Correct Answer - D chemotherapy is use of chemicals for treatment of disease. |
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| 61. |
Phenol can be separated from Benzoic acid effectively by the use ofA. `NaHCO_(3)`B. NaOHC. `aq NH_(3)`D. None of these |
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Answer» Correct Answer - A Benzoic acid reacts while phenol does not . |
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| 62. |
The drug that is effective in the treatment of typhoid isA. novalginB. quinineC. chloromycetinD. vitamin |
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Answer» Correct Answer - C Chloromycetin is effective for typhoid. |
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| 63. |
Which of the following is used as an antacid?A. NaOHB. `Ca(OH)_(2)`C. `Mg(OH)_(2)`D. KOH |
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Answer» Correct Answer - C Magnesium hydroxide, `Mg(OH)_(2)` is a common antacid. |
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| 64. |
Which of the following statements about fibres are correct? 1. They can be made from viscose rayon 2. They are used for making nose tips of missiles 3. They have low thermal conductivity and used as insulators They are used for making components of bone plates Select the correct answer using the codes given below.A. 1 and 2B. 2 and 3C. 2 and 4D. 1,2 and 4 |
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Answer» Correct Answer - D see carbon fibres. |
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| 65. |
A disaccharide that gives two molecules of glucose on hydrolysis isA. SucroseB. MltoseC. GalactoseD. Both B and C |
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Answer» Correct Answer - B Maltose gives two molecules of glucose on hydrolysis. |
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| 66. |
`beta`-carotene is a provitamin ofA. Vitamin AB. Vitamin BC. Vitamin CD. None of these |
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Answer» Correct Answer - A `beta`-carotene is a provitamine of vitamin A. |
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| 67. |
A nucleoside is made up ofA. A base and sugarB. A base and phospheric acidC. A sugar and phospheric acidD. A sugar, a base and phosphoric acid |
| Answer» Correct Answer - A | |
| 68. |
Soaps are classified as :A. EtherB. Salts of fatty acidsC. CarbohydratesD. None of these |
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Answer» Correct Answer - B Soaps are salts of fatty acids. |
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| 69. |
The chemicals used to treat diseases and to reduce the suffering from pain are known as drugs or medicines. The chemicals used in chemotherapy are classified according to their action. For example antipyretics are medicines used to lower the body temperature in high fever. The examples of antipyretics are para ethoxy acetamide and analgin. Analgesics are medicines which relieve pain. They are of two types. (i) Narcotics are medicines which relieve pain by producing sleep and unconsciousness. They are morphine, morphine diacetate (heroin) and codeine. They are habit forming (ii) None narcotic analgesics are not habit forming and do not usually induce sleep. They are aspirin, brufen and butazolidine. Antiseptics are medicines which kill or prevent the growth of micro-organisms. Antiseptics are also used to reduce odours arising out of bacterial decomposition on the surface of the body. They are 2% solution of phenol, dettol (a solution of terpineol and chloro-xylenol) savlon, bithional etc. Tranquillizers are medicine used to relieve mental tension and an anxiety. They act on the nervous system and induce sleep. They may antidepressants (to elevate mood) such as methedrine and vitalin, sedatives (relieve mental agitation and violence) such as diazopam, seconal, luminal and equanil. Antibiotics are medicines produced by micro-organisms such as fungi, bacteria and moulds and are used to kill other microorganisms. They are penicillin (Treat sore throat, bronchitis, pneumonia), streptomycin (active aginst tuberclosis, chloramphenicol treat typhoid, acute fever, urinary infection. Which of the following compounds is aspirin ?A. acetyl salicylic acidB. Methyl salicylateC. Phenyl salicylateD. Salicylic acid |
| Answer» Correct Answer - A | |
| 70. |
Which of the following compounds is aspirin?A. Methyl salicylateB. Acety salicylic acidC. phenyl salicylateD. Salicylic acid |
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Answer» Correct Answer - B Aspirin is o-acetyl salicylic acid. |
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| 71. |
Which of the following is a direct dyeA. Aniline yellowB. Martitus yellowC. phenolpthaleinD. Both (A) and (B) |
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Answer» Correct Answer - B Maurtitus yellow is a direct dye. |
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| 72. |
A monosaccharide isA. LactoseB. SucroseC. RiboseD. Maltose |
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Answer» Correct Answer - C Ribose is a monosaccharides. |
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| 73. |
A non-reducing sugar isA. `alpha` - D glucoseB. SucroseC. `beta`-D glucoseD. Collagen |
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Answer» Correct Answer - B Sucrose is non-reducing sugar. |
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| 74. |
Which of the following is the sweetest sugar?A. FructoseB. GlucoseC. SucroseD. Maltose |
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Answer» Correct Answer - A Fructose is sweeter than glucose, sucrose and maltose. |
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| 75. |
Cyclohexane floats on water becauseA. it has low densityB. it has boat conformationC. it has cyclic structureD. it has planar structure |
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Answer» Correct Answer - A Due to lesser density of cyclohexane than water, it floats on water. |
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| 76. |
Chloramphenicol is anA. antifertility drugB. antihistamineC. antibiotic and disinfactantD. antibiotic broad spectrum |
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Answer» Correct Answer - D Broad spectrum, antibiotics are such antibiotics which act against a wide range of disease causing bacteria e.g. chlorophenicol. |
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| 77. |
Proportions becauseA. of its acidic natureB. it is neutralC. it reacts with waterD. it forms H - bonds |
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Answer» Correct Answer - D `{:(.........H-O.........H-O.......),(" | |"),(" "C_(2)H_(5)" " H):}` |
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| 78. |
Heroin is acetyle derivative ofA. CaffeineB. CocaineC. NicotineD. Morphine |
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Answer» Correct Answer - D Heroin is diacetyl derivative of morphine. |
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| 79. |
Parathion is :A. an organic phosphorus compoundB. chlorinated aromatic compoundC. chlorinated aliphatic compundD. benzene derivative |
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Answer» Correct Answer - A Parathion is an organic phosphorous compound. |
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| 80. |
Which of the following is not used in rocket propellants?A. `H_(2)(l)`B. `O_(2)(l)`C. methaneD. `N_(2)H_(4)(l)` |
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Answer» Correct Answer - C Methane is not used as a rocket propellant, sodium salt of p-dodecyl benzene sulphonic acid. |
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| 81. |
One of the oxidants used with liquid propellants is :A. ammonium perchlorateB. nitrcellulouseC. sulphuric acidD. dinitrogen tetroxide |
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Answer» Correct Answer - D Dinitrogen tetraoxide is used as an oxidant with liquid propellants. |
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| 82. |
Indigo belongs to :A. mordant dyeB. direct dyeC. vat dyeD. disperse dye |
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Answer» Correct Answer - C Indigo is a vat dye. |
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| 83. |
Chemical name of malamine isA. 2,4-Dimino-1, 3- 5-trizineB. 2,4,6-Triamino -1,3,5-triazineC. 1,3,5-triamino benzeneD. 1,3,5- Triamino 2,5,6- treazine |
| Answer» Correct Answer - B | |
| 84. |
Which of the following element is present in natural silk but not in artificial silk ?A. SulphurB. ChalorineC. NitrogenD. Hydrogen |
| Answer» Correct Answer - C | |
| 85. |
The additive used to make PVC, a flexible plastic is calledA. AntioxidantB. PlasticiserC. StabilizerD. Synthesier |
| Answer» Correct Answer - B | |
| 86. |
The raw material to form nylon is:A. Adipic acidB. ButadieneC. EthyleneD. Methyl methacrylate |
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Answer» Correct Answer - A Adipic acid is a raw material for making nylon-66 |
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| 87. |
Which of the following is known as invert soap?A. Pentaerythritol monostearateB. Sodium stearyl sulphateC. Trimethyl stearyl ammonium bromideD. Ethoxylated nonyphenol |
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Answer» Correct Answer - C Trimethyl stearly ammonium bromide has a chiral nitrogen atom. |
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| 88. |
Which one of the following statements is true?A. Soponification of oil yields a diolB. Drying of oil involves hydrolysisC. Addition of antixidant to oil minimizes rancidityD. Refining of oil involves hydrolysis |
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Answer» Correct Answer - C Addition of antioxidants prevents rancidity. |
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| 89. |
Which one of the following types of drugs reduces fever?A. AnalgesicB. AntipyreticC. AntbioticD. Tranquiliser |
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Answer» Correct Answer - B See antipyretics. |
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| 90. |
Which one of the following creates great thrust and high performance in a missile?A. Microlloyed goldB. Cryogenic liquidC. Carbon fibresD. Buthlated hydroxy anisole |
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Answer» Correct Answer - B Liquid `H_(2)` and liquid `O_(2)` are cryogenic liquid propellents and show high perfomance in a missile. |
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| 91. |
The keto form of ethyl aceto acetate is indicated byA. SodiumB. `NaHSO_(3)`C. `FeCl_(3)`D. `Br_(2)` |
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Answer» Correct Answer - B It gives white addition product with `NaHSO_(3)`. |
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| 92. |
Ethyl acetate treated with Na/EtOH givesA. `CH_(3)CO O Na`B. `CH_(3)COC_(2)H_(5)`C. `CH_(3)COCH_(2)CO OC_(2)H_(5)`D. `C_(2)H_(5)OC_(2)H_(5)` |
| Answer» Correct Answer - C | |
| 93. |
`A+5HIO_4 to 4 HCOOH+ 2HCHO` The probable structure of A isA. `CH_(2)OH(CHOH)_(3)CHO`B. `CH_(2)OH(CHOH)_(4)CHO`C. `CHO(CHOH)_(4)CHO`D. `CH_(2)OH(CHOH)_(4)CH_(2)OH` |
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Answer» Correct Answer - D Terminal `CH_(2)OH` group is oxidised to HCHO while secondary gt CHOH group is oxidised to HCOOH. |
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| 94. |
Artificial sweetener used in soft drinks is:A. lactoseB. aspartameC. glycerolD. fructose |
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Answer» Correct Answer - B Aspartamine is an artificial sweetener. |
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| 95. |
Assertion: Antioxidants inhibits free radical reactions. Reason: Tertiary butyl hydroquinone is an antioxidant.A. Both A and R and true and R is the correct expalantion of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is falseD. A is false but R is true |
| Answer» Correct Answer - A | |
| 96. |
Ethylene glycol on oxidation with periodic acid givesA. fromaldehydeB. oxalic acidC. glyoxalD. glycolic acid |
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Answer» Correct Answer - A `{:(CH_(2)-OH),("|"),(CH_(2)-OH):} overset(HIO_(4))toHCHO+HIO_(3) +H_(2)O` |
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| 97. |
Amongst the following compounds which is most acidic?A. EthanolB. p -NitrophenolC. Picric acidD. Phenol |
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Answer» Correct Answer - C Due to three `-NO_(2)` (-I) groups . |
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| 98. |
Among the following which is the most soluble in cold 5% aq NaOH?A. `CH_(3)(CH_(2))_(3)CO OH`B. `CH_(3)(CH_(2))_(2)COCH_(3)`C. `CH_(3)(CH_(2))_(2)CHO`D. `CH_(3)CH_(2)OH` |
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Answer» Correct Answer - A Being Acidic it is soluble in 5% aq. NaOH. |
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| 99. |
Which of the following is not a surfactant?A. `CH_(3)-(CH_(2))_(15)-N^(+)(CH_(3))_(3)Br^(-)`B. `CH_(3)-(CH_(2))_(14)-CH_(2)NH_(2)`C. `CH_(3)-(CH_(2))_(16)-CH_(2)OSO_(2)-Na^(+)`D. `OHC-(CH_(2))_(14)-CH_(2)-CO O^(-)Na^(+)` |
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Answer» Correct Answer - B `CH_(3)(CH_(2))_(14)CH_(2)NH_(2)` has only hydrophobic part and insignificant hydrophilic part. |
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| 100. |
Which of the following groups is not an auxochrome?A. `-N(CH_(3))_(2)`B. `-OH`C. `-OCH_(3)`D. `-N=N-` |
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Answer» Correct Answer - D See introduction of dyes. |
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