InterviewSolution
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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.
| 2151. |
A positive carbylamine test is given by :A. N,N-dimethylanilineB. 4-methylanilineC. N-methyl-o-methylailineD. N-methylaniline |
| Answer» Correct Answer - b | |
| 2152. |
Each question has choices (a), (b), (c ) and (d) out of which ONLY ONR is correct. STATEMENT -1 : Pure and oxidised `CHCl_(3)` can be differentianted by aq. `AgNO_(3)` STATEMENT - 2 : Pure `CHCl_(3)` gives white ppt. with aq.`AgNO_(3)`but oxidised `CHCl_(3)` does not.A. Statement -1 is True, Statement-2 is True ,Statement -2 is a correct explanation for Statement -1.B. Statement -1 is True, Statement-2 is True ,Statement -2 is a NOT correct explanation for Statement -1.C. Statement -1 id True , Statement -2 is False.D. Statement -1 is False Statement -2 is True. |
| Answer» Correct Answer - c | |
| 2153. |
Select the incorrect statement about nylon 2-nylon-6 :A. It is a copolymer.B. It is biodegradable.C. It is an alternating polymide.D. It is made up of `CH_(3)-underset(NH_(2))underset(|)CH-COOH" and " H_(2)N(CN_(2))_(5)COOH`. |
| Answer» Correct Answer - d | |
| 2154. |
`Molisch reagment is used to identify following compound :A. glucoseB. raffinoseC. D-oxyriboseD. all of these |
| Answer» Correct Answer - d | |
| 2155. |
During the fusion of an organic compound with sodium metal, nitrogen of the organic compound is converted intoA. `NaNO_(2)`B. NaCNC. `NaNH_(2)`D. NaNC |
| Answer» Correct Answer - b | |
| 2156. |
The sodium extract of an organic compound on acidification with acetic acid and addition of lead acetate solution gives a black precipitate. The organic compound containsA. nitrogenB. halogenC. sulphurD. phosphorus |
| Answer» Correct Answer - c | |
| 2157. |
Latest techniquue for purification, isolation and separation of organic compounds:A. charomatographyB. steam distillationC. crystallisationD. vacuum distillation |
| Answer» Correct Answer - a | |
| 2158. |
The correct statement`(s)` about the following sugars `(X)` and `(Y) is//are`: A. X is a reducing and Y is a non-reducing sugarB. X is a reducing and Y is a reducing sugarC. The glucosidiclinkages in X and Y are `alpha` and `beta`respectivelyD. The glucosidiclinkages in X and Y are `beta` and `alpha`respectively |
| Answer» Correct Answer - b,c | |
| 2159. |
The most satisfactory method for separating sugars is :A. fractional distillationB. vacuum distillationC. chromatographyD. steam distillation |
| Answer» Correct Answer - c | |
| 2160. |
Steam distillation is applied to those organic compound which are steam volatile and :A. soluble in waterB. insoluble in waterC. sparingly soluble in waterD. insoluble in all solvents |
| Answer» Correct Answer - d | |
| 2161. |
Distillation involves all the following processes except :A. change of stateB. boiling condensationC. evaporationD. |
| Answer» Correct Answer - d | |
| 2162. |
Aniline is usaully purified by :A. chromatograhicB. techniqueC. steam distillationD. by addition of oxalic acid |
| Answer» Correct Answer - b | |
| 2163. |
Olis are purified by :A. fractional distillationB. steam distillationC. vacuum distillationD. simple distillation |
| Answer» Correct Answer - b | |
| 2164. |
Chromatography technique is used for the separation of :A. small samples of mixturesB. plant pigmentsC. dye stuffsD. all of the above |
| Answer» Correct Answer - d | |
| 2165. |
Enery is stored in our body in the form of …………. (a) ATP (b) ADP (c) Fats (d) carbohydrates |
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Answer» Enery is stored in our body in the form of ATP. |
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| 2166. |
When `(+)` sucrose is hydrolysed, the `D`-glucose mutarotates downward to `+52.7^(@)`. What does this indicate about the structures of `(+)`-sucrose? |
| Answer» Correct Answer - In hydrolysis of sucrose glucose is obtained as cyclic pyranose form responsible for mutarotation. | |
| 2167. |
Translocation of sugar in flowering plants occurs in the form ofA. GlucoseB. SucroseC. FructoseD. Maltose |
| Answer» Correct Answer - B | |
| 2168. |
Which of the following is not present in RNA?A. UracilB. ThymineC. RiboseD. Phosphate |
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Answer» Correct Answer - B Thymine base is not present in RNA. In RNA, uracil is found in place of thymine. |
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| 2169. |
Which is not the correct statement about RNA and DNA?A. DNA is active in virus where RNA never appears virusB. DNA exists as dimer while RNA is usually single strandedC. DNA contains deoxyribose as its sugar and RNA contains riboseD. RNA contains uracil in place of thymine (found in DNA) as a base |
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Answer» Correct Answer - A RNA is usually found in virus as genetic material than DNA. |
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| 2170. |
which of the following sugar if found in ATP?A. DECxyriboseB. RibseC. TrehaloseD. Glucose |
| Answer» Correct Answer - B | |
| 2171. |
Which one of the following does not constitute the nucleic acid?A. UracilB. Ribose sugarC. Phosphoric acidD. Guanidine |
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Answer» Correct Answer - D Guanidine does not constitute the nucleic acid. |
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| 2172. |
How many different codons are possible?A. 16B. 32C. 48D. 64 |
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Answer» Correct Answer - D 64 different codons are possible. |
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| 2173. |
Which of the following match is correct?A. DNA `to beta` - D-3-deoxyriboseB. DNA `to beta` - D-1-deoxyriboseC. RNA `to beta`-D-riboseD. RNA `to beta`-D-3-deoxyribose |
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Answer» Correct Answer - C In DNA molecules, the sugar moiety is `beta` D-2-deoxyribose whereas in RNA molecule, it is `beta` D-ribose. |
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| 2174. |
sucrose is composed ofA. Glucose and fructoseB. Glucose and glycogenC. Two molecules fo glucoseD. Glycogen and fractose |
| Answer» Correct Answer - C | |
| 2175. |
Complete hydrolysis of DNA/RNA yieldsA. a pentose sugarB. phosphoric acidC. base (Nitrogen containing heterocyclic compounds)D. All of the above |
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Answer» Correct Answer - D Complete hydrolysis of DNA (or RNA) yields a pentose sugar, phosphoric acid and nitrogen containing heterocyclic compounds (called bases). |
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| 2176. |
Sucrose, a common table sugar, is composed ofA. Glucose + fructoseB. Glucose + galactoseC. Fructose + galactoseD. None of these |
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Answer» Correct Answer - A (a) Sucrose is the common cane or table sugar which is composed of D-glucose and fructose attached together by the aldehyde and ketone carbon. |
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| 2177. |
Which one yields protein on hydrolysis ?A. Fatty acidB. Nucleic acidC. Amino acidD. None of the above. |
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Answer» Correct Answer - D (D) Amino acid are formed on hydrolysis of protein. |
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| 2178. |
Which is non-reducing sugarA. GlucoseB. GalactoseC. MannoseD. Sucrose |
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Answer» Correct Answer - D (d) The carbohydrates or sugar where free aldehyde or ketonic group is absent (utilized in glycosidic bond formation) can not reduce the above reagents are called non-reducing sugar i.e., Sucrose, glycogen, starch. |
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| 2179. |
Which one of the following is conjugate proteinA. GlobulinB. AlbuminC. HistoneD. Flavoprotein |
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Answer» Correct Answer - D (d) The non proteineous prosthetic group is FMN or FAD. The protein is flavoprotein, which is a type of conjugated protein. |
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| 2180. |
Almost all enzymes are proteins. The enzymes haveA. `1^(@)` structureB. `2^(@)` structureC. `3^(@)` structureD. All of the above |
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Answer» Correct Answer - D (D) Almost all enzymes are proteins. Enzymes have `1^(@)` structure, `2^(@)` structure and `3^(@)` structure |
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| 2181. |
In an enzyme, active sites/pockets/crevies are present onA. `1^(@)` structureB. `2^(@)` structureC. `3^(@)` structureD. All of the above |
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Answer» Correct Answer - C (C) in enzyme, active sites/pockets/crevices are present on `3^(@)` structure |
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| 2182. |
A complex polysaccharide produced from sucrose by the bacterium Leuconostoc mesenteroides isA. ChitinB. StarchC. CelluloseD. Dextran |
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Answer» Correct Answer - D (d) Dextran is a complex polysaccharide prepared either through partial hydrolysis of starch or polymerization of sucrose by the bacterium Leuconostoc mesenteroides. |
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| 2183. |
What are the products of hydrolysis of sucrose? |
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Answer» Sucrose on hydrolysis gives one molecule each of glucose and fructose. |
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| 2184. |
Assertion. All organisms contain the same organic compounds in about the same proportions. Reason. All organisms have evolved from the first primitive cells which came into existence about 3.6 billion years ago.A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.C. If Assertion is true but the Reason is false.D. If both Assertion and Reason are false. |
| Answer» Correct Answer - A | |
| 2185. |
How many amino acids migrates towards anode on electrolysis at pH = 8 ? |
| Answer» Correct Answer - 8 | |
| 2186. |
Which of the following is a step-growth polymer?A. PolyisopreneB. PolytheneC. NylonD. Polyacrylonitrile |
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Answer» Correct Answer - C Step growth polymerization involves condensation reaction between two difunctional monomer to produce dimer which in turn, produce, tetramer and so on with the loss of simple molecules like `H_(2)O,NH_(3),HCl`, etc. |
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| 2187. |
Bakelites areA. RubberB. RayonC. ResinsD. Plasticisers |
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Answer» Correct Answer - C Resins are amorphous organic solids or semisolids which usually have a typical lustre and are ofter transparent or translucent. |
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| 2188. |
Acetate rayon is prepared fromA. Acetic acidB. GlycerolC. StrachD. Cellulose |
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Answer» Correct Answer - D Rayon fibre is chemically identical to cotton but has a shine like silk, rayon is also called a regenerated fibre because during its preparation Cellulose is regenerated by dissolving it in `NaOH` and `CS_(2)` |
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| 2189. |
Nylon -`66` isA. polyamideB. polyesterC. PolystyreneD. polyvinyl |
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Answer» Correct Answer - A All the nylons are polyamides. |
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| 2190. |
Polymer isA. ThermoplasticB. ThermosettingC. Both (a) and (b)D. None of these |
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Answer» Correct Answer - A Thermoplastic are those which beocmes soft on heating and can be romoulded again. |
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| 2191. |
Which of the following is not an example of natural polymer?A. WoolB. SilkC. LeatherD. Nylon |
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Answer» Correct Answer - D Nylon is a synthetic polymer. |
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| 2192. |
In elastomer, intermolecular forces areA. nilB. weakC. strongD. very strong |
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Answer» Correct Answer - B Polymer chains in elastomer are held together by weak intermolecular forces `e.g.` Vulacanised rubber. |
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| 2193. |
Write the names of monomers of the following polymers : |
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Answer» Correct Answer - (i) Hexamethylenediarnine, `H_(2)N-(CH_(2))o-HN_NH_(2)` and adipic acid, `HOOC-(CH_(2))_(4)-eOOH` (ii) Caprolactam (iii) Tetrafluroethene, `F_(2)C=CF_(2)`. |
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| 2194. |
Monomers are converted to polymers byA. Hydrolysis of monomerB. Condensation between monomersC. Protonation of monomersD. none |
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Answer» Correct Answer - B Polymerization takes place either by condensation or addition reactions. |
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| 2195. |
What is ‘peptide linkage’ as related to proteins? |
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Answer» The linkage, – CO – NH – which unites various amino acid units in a peptide molecule is called peptide linkage. |
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| 2196. |
Styrene at room temperature isA. SolidB. LiquidC. GasD. Colloidal solution |
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Answer» Correct Answer - B Styrene at room temperature is liquid |
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| 2197. |
Distinguish between essential and non essential amino acids. Give examples. |
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Answer» 1. The amino acids which can be synthesized in our body are known as non-essential amino acids, eg. Glycine, Alanine. 2. Those amino acids which can not be synthesized in our body and must be obtained through diet are known as essential amino acids. eg. valine, Lysine |
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| 2198. |
Lactose is made of ……… |
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Answer» β -D galactose and β -D glucose |
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| 2199. |
What do you understand by the term glycosidic linkage? |
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Answer» The two mono saccharide units are linked together by an oxide or either linkage formed by the loss of water molecules. Such a linkage called glycosidic linkage. |
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| 2200. |
Glucose does not react with ……….. (a) Br2 /H2O (b) NH2OH (c) HI (d) NaHSO3 (e) CH3 -CO-O-CO-CH3 |
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Answer» Glucose does not react with NaHSO3 |
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