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MCQOPTIONS
This section includes 200950 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 16251. |
An organic compound X is oxidised by using acidified K2Cr2O7. The product obtained reacts with Phenyl hydrazine but does not answer silver mirror test. The possible structure of X is? |
| A. | CH3 ¾¾ CH3 |
| B. | CH3CH2OH |
| C. | CH3CHO |
| D. | (CH3)2CHOH |
| Answer» E. | |
| 16252. |
An organic compound on heating with CuO produces CO2 but no water. The organic compound may be? |
| A. | Methane |
| B. | Carbon tetrachloride |
| C. | Ethyl iodide |
| D. | Chloroform |
| Answer» C. Ethyl iodide | |
| 16253. |
An ionic compound is expected to have tetrahedral structure if lies in the range of? |
| A. | 0.414 to 0.732 |
| B. | 0.155 to 0.225 |
| C. | 0.225 to 0.414 |
| D. | 0.732 to 1 |
| Answer» D. 0.732 to 1 | |
| 16254. |
An octahedral complex is formed when hybrid orbitals of the following type are involved? |
| A. | sp3 |
| B. | d2sp3 |
| C. | d sp2 |
| D. | sp2d2 |
| Answer» C. d sp2 | |
| 16255. |
Arrange the following states in descending order with respect to urban population .Choose your answer from the following codes. 1.Tamil Nadu 2. Uttar Pradesh 3. Maharashtra 4. west Bengal |
| A. | 1,3,4,2 |
| B. | 1,2,3,4 |
| C. | 4,3,2,1 |
| D. | 3,2,4,1 |
| Answer» C. 4,3,2,1 | |
| 16256. |
Consider the following taxes 1. customs duty 2. Excise duty3. corporation tax 4. wealth taxWhich of these is/are indirect taxes ? |
| A. | 1 and 2 |
| B. | 3 and 4 |
| C. | 1,2,3,and 4 |
| D. | 2 only |
| Answer» B. 3 and 4 | |
| 16257. |
The normality of 30 volume H2O2 is? |
| A. | 2.678 N |
| B. | 8.034 N |
| C. | 5.336 N |
| D. | 6.685 N |
| Answer» D. 6.685 N | |
| 16258. |
The reagent with which both acetaldehyde and acetone react is ? |
| A. | Tollen's reagent |
| B. | Carbonic acid |
| C. | Fehling's reaction |
| D. | I2/NaOH |
| Answer» E. | |
| 16259. |
The sp3d2 hybridization of central atom of a molecule would lead to? |
| A. | Octahedral geometry |
| B. | Trigonal bipyramidal geometry |
| C. | Tetrahedral geometry |
| D. | square planar geometry |
| Answer» B. Trigonal bipyramidal geometry | |
| 16260. |
The number of naturally occurring p-block elements that are diamagnetic is ______? |
| A. | 5 |
| B. | 7 |
| C. | 18 |
| D. | 6 |
| Answer» B. 7 | |
| 16261. |
The ozone layer forms naturally by? |
| A. | the interaction of CFC with oxygen |
| B. | the interaction of IR radiation with oxygen |
| C. | the interaction of UV radiation with oxygen |
| D. | the interaction of oxygen and water vapour |
| Answer» D. the interaction of oxygen and water vapour | |
| 16262. |
Among the following, the compound that contains ionic, covalent and coordinate linkage is? |
| A. | NH4Cl |
| B. | NH3 |
| C. | CaO |
| D. | NaCl |
| Answer» B. NH3 | |
| 16263. |
An element with atomic number 21 is a? |
| A. | halogen |
| B. | transition element |
| C. | representative element |
| D. | alkali metal |
| Answer» C. representative element | |
| 16264. |
An alkyl halide reacts with alcoholic ammonia in a sealed tube, the product formed will be? |
| A. | a primary amine |
| B. | a tertiary amine |
| C. | a secondary amine- |
| D. | a mixture of all the three |
| Answer» E. | |
| 16265. |
An aqueous solution containing 6.5 gm of NaCl of 90% purity was subjected to electrolysis. After the complete electrolysis, the solution was evaporated to get solid NaOH. The volume of 1 M acetic acid required to neutralise NaOH obtained above is? |
| A. | 1000 cm3 |
| B. | 2000 cm3 |
| C. | 200 cm3 |
| D. | 100 cm3 |
| Answer» E. | |
| 16266. |
Acidified K2Cr2O7 solution turns green when Na2SO3 is added to it. This is due to the formation of? |
| A. | CrSO4 |
| B. | SO4 |
| C. | Cr2(SO4)3 |
| D. | Cr2(SO3)3 |
| Answer» D. Cr2(SO3)3 | |
| 16267. |
According to Bayer's strain theory which is highly stable? |
| A. | cyclohexane |
| B. | cyclopentane |
| C. | cycloheptane |
| D. | cyclobutane |
| Answer» C. cycloheptane | |
| 16268. |
A white crystalline salt A reacts with dilute HCI to liberate a suffocating gas B and also forms a yellow precipitate. The gas B turns potassium dichromate acidified with dilute H2SO4 to a green coloured solution C. A, B and C are respectively ______? |
| A. | Na2S2O3, SO2, Cr2 (SO4)3 |
| B. | Na2SO3, SO2, Cr2 (SO4)3 |
| C. | Na2SO4, SO2, Cr2 (SO4)3 |
| D. | Na2S, SO, Cr2 (SO4)3 |
| Answer» B. Na2SO3, SO2, Cr2 (SO4)3 | |
| 16269. |
Acidified sodium fusion extract on addition of ferric chloride solution gives blood red colouration which confirms the presence of? |
| A. | S |
| B. | N |
| C. | N and S |
| D. | S and Cl |
| Answer» D. S and Cl | |
| 16270. |
Amines behave as? |
| A. | Lewis acids |
| B. | aprotic acid |
| C. | Lewis base |
| D. | neutral compound |
| Answer» D. neutral compound | |
| 16271. |
Which is not the correct statement about RNA and DNA? |
| A. | RNA contains uracil in place of thymine (found in DNA) as a base |
| B. | DNA contains deoxyribose as its sugar and RNA contains ribose |
| C. | DNA exists as dimer while RNA is usually single stranded |
| D. | DNA is active in virus where RNA never appears in virus |
| Answer» E. | |
| 16272. |
What is the nature of glucose-glucose linkage in starch that makes its so susceptible to acid hydrolysis? |
| A. | Starch is hemiacetal |
| B. | Starch is polymer |
| C. | Starch is acetal |
| D. | Starch contains only few molecules of glucose |
| Answer» D. Starch contains only few molecules of glucose | |
| 16273. |
When a mixture of calcium benzoate and calcium acetate is dry distilled, the resulting compound is? |
| A. | acetophenone |
| B. | benzaldehyde |
| C. | benzophenone |
| D. | acetaldehyde |
| Answer» B. benzaldehyde | |
| 16274. |
Which cycloalkane has the lowest heat of combustion per CH2 group? |
| A. | cyclopropane |
| B. | cyclobutanc |
| C. | cyclopontane |
| D. | cyclohexane |
| Answer» E. | |
| 16275. |
A ligand can also be regarded as? |
| A. | Lewis acid |
| B. | Bronsted base |
| C. | Lewis base |
| D. | Bronsted acid |
| Answer» D. Bronsted acid | |
| 16276. |
A gaseous mixture was prepared by taking equal mole of CO and N2. If the total pressure of the mixture was found 1 atmosphere, the partial pressure of the nitrogen (N2) in the mixture is? |
| A. | 1 atm |
| B. | 0.8 atm |
| C. | 0.5 atm |
| D. | 0.9 atm |
| Answer» D. 0.9 atm | |
| 16277. |
Which of the following compound would not evolve CO2 when treated with NaHCO3 solution? |
| A. | salicylic acid |
| B. | phenol |
| C. | benzoic acid |
| D. | 4-nitro benzoic acid |
| Answer» C. benzoic acid | |
| 16278. |
A mixture of CaCl2 and NaCl weighing 4.44 g is treated with sodium carbonate solution to precipitate all the Ca 2 ions as calcium carbonate. The calcium carbonate so obtained is heated strongly to get 0.56 g of CaO. The percentage of NaCl in the mixture (atomic mass of Ca = 40) is ______? |
| A. | 30.6 |
| B. | 69.4 |
| C. | 75 |
| D. | 25 |
| Answer» D. 25 | |
| 16279. |
A metal present in insulin is? |
| A. | copper |
| B. | zinc |
| C. | iron |
| D. | aluminium |
| Answer» C. iron | |
| 16280. |
A diabetic person carries a pocket of Glucose with him always, because? |
| A. | Glucose reduces the blood sugar level. |
| B. | Glucose increases the blood sugar level almost instantaneously. |
| C. | Glucose reduces the blood sugar level slowly. |
| D. | Glucose increases the blood sugar level slowly. |
| Answer» C. Glucose reduces the blood sugar level slowly. | |
| 16281. |
A dibromo derivative of an alkane reacts with sodium metal to form an alicyclic hydrocarbon. The derivative is ______? |
| A. | 2, 2 - dibromobutane |
| B. | 1, 4 - dibromobutane |
| C. | 1, 1 - dibromopropane |
| D. | 1, 2 - dibromoethane |
| Answer» C. 1, 1 - dibromopropane | |
| 16282. |
A covalent molecule AB3 has pyramidal structure. The number of lone pair and bond pair electrons in the molecule are respectively? |
| A. | 3 and 1 |
| B. | 2 and 2 |
| C. | 1 and 3 |
| D. | 0 and 4 |
| Answer» D. 0 and 4 | |
| 16283. |
A gas deviates from ideal behaviour at a high pressure because its molecules? |
| A. | are bound by covalent bonds |
| B. | have kinetic energy |
| C. | show the Tyndall effect |
| D. | attract one another |
| Answer» E. | |
| 16284. |
A compound of 'A' and 'B' crystallises in a cubic lattice in which the 'A' atoms occupy the lattice points at the comers of the cube. The 'B' atoms occupy the centre of each face of the cube. The probable empirical formula of the compound is? |
| A. | AB |
| B. | AB2 |
| C. | AB3 |
| D. | A3B |
| Answer» D. A3B | |
| 16285. |
Which of the following gives an aldehyde on dry distillation? |
| A. | Calcium acetate + calcium benzoate |
| B. | Calcium formate + calcium acetate |
| C. | Calcium benzoate |
| D. | Calcium acetate |
| Answer» C. Calcium benzoate | |
| 16286. |
Which of the following is not an ore of magnesium? |
| A. | Carnallite |
| B. | Calamine |
| C. | Dolomite |
| D. | Sea water |
| Answer» C. Dolomite | |
| 16287. |
Which of the following has the highest bond order? |
| A. | N2 |
| B. | O2 |
| C. | He2 |
| D. | H2 |
| Answer» B. O2 | |
| 16288. |
A compound is formed by elements A and B. This crystallises in the cubic structure where the A atoms are at the comers of the cube and B atoms are at the body centres. The simplest formula of the compound is? |
| A. | AB6 |
| B. | A8B4 |
| C. | A6B |
| D. | AB |
| Answer» E. | |
| 16289. |
Which of the following does not give benzoic acid on hydrolysis? |
| A. | phenyl cyanide |
| B. | benzyl chloride |
| C. | benzoyl chloride |
| D. | methyl benzoate |
| Answer» C. benzoyl chloride | |
| 16290. |
Which of the following is used to prepare Cl2 gas at room temperature from concentrated HCI? |
| A. | MnO2 |
| B. | H2S |
| C. | KMnO4 |
| D. | Cr2O3 |
| Answer» D. Cr2O3 | |
| 16291. |
A complex compound in which the oxidation number of a metal is zero is? |
| A. | K4 [Fe (CN)6] |
| B. | [Ni (CO)4] |
| C. | K3 [Fe (CN)6] |
| D. | [Pl (NH3 )4]Cl2 |
| Answer» C. K3 [Fe (CN)6] | |
| 16292. |
A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of is 0.20 M. If the equilibrium constant, Kb for NH3 equals 1.8 × 10–5, what is the pH of this solution? |
| A. | 8.73 |
| B. | 9.43 |
| C. | 9.08 |
| D. | 11.72 |
| Answer» C. 9.08 | |
| 16293. |
A buffer solution contains 0.1 mole of sodium acetate dissolved in 1000 cm3 of 0.1 M acetic acid. To the above buffer solution, 0.1 mole of sodium acetate is further added and dissolved. The pH of the resulting buffer is equal to ______? |
| A. | pKa |
| B. | pKa + L0g2 |
| C. | pKa - Log2 |
| D. | pKa + 2 |
| Answer» C. pKa - Log2 | |
| 16294. |
A body of mass x kg is moving with a velocity of 100 ms-1. Its de Broglie wavelength is 6.62 ´ 10-35m. Hence x is (h = 6.62 ´ 10-34Js)? |
| A. | 0.15 kg |
| B. | 0.1 kg |
| C. | 0.2 kg |
| D. | 0.25 kg |
| Answer» C. 0.2 kg | |
| 16295. |
A 6% solution of urea is isotonic with? |
| A. | 6% solution of Glucose |
| B. | 1 M solution of Glucose |
| C. | 25% solution of Glucose |
| D. | 0.05 M solution of Glucose |
| Answer» C. 25% solution of Glucose | |
| 16296. |
9.65 C of electric current is passed through fused anhydrous magnesium chloride. The magnesium metal thus obtained is completely converted into a Grignard reagent. The number of moles of the Grignard reagent obtained is ______? |
| A. | 5 ´ 10-5 |
| B. | 1 ´ 10-5 |
| C. | 5 ´ 10-4 |
| D. | 1 ´ 10-4 |
| Answer» B. 1 ´ 10-5 | |
| 16297. |
80 g of oxygen contains as many atoms as in? |
| A. | 5 g of hydrogen |
| B. | 10 g of hydrogen |
| C. | 1 g of hydrogen |
| D. | 80 g of hydrogen |
| Answer» B. 10 g of hydrogen | |
| 16298. |
A bivalent metal has an equivalent mass of 32. The molecular mass of the metal nitrate is? |
| A. | I92 |
| B. | 182 |
| C. | 188 |
| D. | 168 |
| Answer» D. 168 | |
| 16299. |
A body of mass 10 mg is moving with a velocity of 100 ms-1. The wavelength of de-Broglie wave associated with it would be?(Note : h = 6.63 ´ 10-34Js) |
| A. | 6.63 ´ 10-37m |
| B. | 6.63 ´ 10-34m |
| C. | 6.63 ´ 10-31m |
| D. | 6.63 ´ 10-35m |
| Answer» D. 6.63 ´ 10-35m | |
| 16300. |
50 cm3 of 0.2 N HCI is titrated against 0.1 N NaOH solution. The titration is discontinued after adding 50 cm3 of NaOH. The remaining titration is completed by adding 0.5 N KOH. The volume of KOH required for completing the titration is ______? |
| A. | 25 cm3 |
| B. | 10.5 cm3 |
| C. | 12 cm3 |
| D. | 10 cm3 |
| Answer» E. | |