MCQOPTIONS
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MCQOPTIONS
This section includes 1184 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 401. |
The reduction potential Zn is_________________? |
| A. | 0.76 |
| B. | -0.76 |
| C. | -0.55 |
| D. | 0.55 |
| Answer» C. -0.55 | |
| 402. |
The rectified spirit is________________? |
| A. | 12% alcohol |
| B. | 90% alcohol |
| C. | 95% alcohol |
| D. | 100% alcohol |
| Answer» D. 100% alcohol | |
| 403. |
The rectified spirit contains________________? |
| A. | 12% alcohol |
| B. | 90% alcohol |
| C. | 95% alcohol |
| D. | 100% alcohol |
| Answer» D. 100% alcohol | |
| 404. |
The reciprocal of the coefficent of viscosity is called__________? |
| A. | Density |
| B. | Specific gravity |
| C. | Fluidity |
| D. | Absorbance |
| Answer» D. Absorbance | |
| 405. |
The reaction of Lucas reagent is the fastest with_________? |
| A. | (CH3)2CHOH |
| B. | CH3(CH2)OH |
| C. | CH3CH2OH |
| D. | (CH3)3COH |
| Answer» E. | |
| 406. |
The reaction of carboxylic acids with alcohols in presence of cone. H2SO4 is called _________________? |
| A. | esterification |
| B. | neutralization |
| C. | hydrolysis |
| D. | saponification |
| Answer» B. neutralization | |
| 407. |
The rate of reaction___________________? |
| A. | Increases as the reaction proceeds |
| B. | Decreases as the reaction proceeds |
| C. | Remains the same as the reaction proceeds |
| D. | May decrease or increase as the reaction proceeds |
| Answer» C. Remains the same as the reaction proceeds | |
| 408. |
The rate of E1 reaction depends upon______________________? |
| A. | the concentration of substrate |
| B. | the concentration of nucleophile |
| C. | the concentration of substrate as well as nucleophile |
| D. | base the concentration of substrate as well as nucleophile |
| Answer» B. the concentration of nucleophile | |
| 409. |
The radioactive isotope of hydrogen is called___________? |
| A. | tritium |
| B. | deuterium |
| C. | protium |
| D. | ortho-hydrogen |
| Answer» B. deuterium | |
| 410. |
The quantity of heat required to convert one mole of liquid into its vapours at its boiling point is called molar heat of__________________? |
| A. | vaporization |
| B. | evaporation |
| C. | crystallization |
| D. | sublimation |
| Answer» B. evaporation | |
| 411. |
The purpose of Smelting an ore is to________? |
| A. | Reduce it |
| B. | Oxidize it |
| C. | Obtain an alloy |
| D. | Separate volatile impurities |
| Answer» B. Oxidize it | |
| 412. |
The property which increases upto group IV-A then decreases on wards_______________? |
| A. | Ionization energy |
| B. | Atomic radii |
| C. | Melting & boiling points |
| D. | Atomic volume |
| Answer» D. Atomic volume | |
| 413. |
The property of carbon chain formation is called _________________? |
| A. | catenation |
| B. | hybridization |
| C. | polymerization |
| D. | solvation |
| Answer» B. hybridization | |
| 414. |
The properties of an element mosly corresponds to that isotope which has greater_________________? |
| A. | Mass number |
| B. | Atomic mass |
| C. | Relative abundance |
| D. | all of the above |
| Answer» D. all of the above | |
| 415. |
The processes of effusion and diffusion are best understand by________________? |
| A. | Daltons law |
| B. | Avogadros law |
| C. | Grahams law |
| D. | Charles law |
| Answer» D. Charles law | |
| 416. |
The process of polymerization was classified by___________________? |
| A. | Strecker |
| B. | Sabatier |
| C. | Runge |
| D. | W. H. Carothers |
| Answer» E. | |
| 417. |
The process of fermentation of starch involve many enzymes the sequence of enzymes used are____________________? |
| A. | Diastase-maltase-zymase |
| B. | Zymase-maltase-diastase |
| C. | Maltase-diastase-zymase |
| D. | Diastase-zymase-maltase |
| Answer» B. Zymase-maltase-diastase | |
| 418. |
The process of fermentation involves all the enzymes except__________________? |
| A. | Diastase |
| B. | Invertase |
| C. | Zymase |
| D. | Sucrase |
| Answer» E. | |
| 419. |
The process of aluminium extraction is called__________________? |
| A. | Hall process |
| B. | Thermite process |
| C. | Haber process |
| D. | Contact process |
| Answer» B. Thermite process | |
| 420. |
The pressure during the molar heat of fusion is kept________________? |
| A. | 0 atmosphere |
| B. | one atmosphere |
| C. | 2 atmosphere |
| D. | 10 atmosphere |
| Answer» C. 2 atmosphere | |
| 421. |
The preparation of benzene from acetylene can also be said as_________________? |
| A. | Oxidation |
| B. | Polymerization |
| C. | Dehydration |
| D. | Condensation |
| Answer» C. Dehydration | |
| 422. |
The precess in which larger molecule with higher molecular weight breaks down into smaller moleucles with lower molecular weight____________________? |
| A. | polymerization |
| B. | pyrolysis |
| C. | isomerism |
| D. | no such process occurs |
| Answer» C. isomerism | |
| 423. |
The practical problem in Hydrogen production is it:______________? |
| A. | Weight |
| B. | Valency |
| C. | Size |
| D. | Chemical property |
| Answer» B. Valency | |
| 424. |
The potassium present in plant help the plant to___________________? |
| A. | form starch sugar and fibrous material |
| B. | ripen the seeds and fruits |
| C. | increase the resistance against disease |
| D. | all the above statements are correct |
| Answer» E. | |
| 425. |
The phenomenon in which a compound exists in two or more crystalline forms is called ________________? |
| A. | Isomorphism |
| B. | Polymorphism |
| C. | Anisotropy |
| D. | Allotropy |
| Answer» C. Anisotropy | |
| 426. |
The PH of the 0.0032 M H2SO4 is__________? |
| A. | 3.2 |
| B. | 4.0 |
| C. | 2.198 |
| D. | 1.0 |
| Answer» B. 4.0 | |
| 427. |
The PH of the 1.3 × 10-4 NH4Cl is__________? |
| A. | 1.3 |
| B. | 4.0 |
| C. | 2.886 |
| D. | 3.886 |
| Answer» E. | |
| 428. |
The PH of Tears is __________? |
| A. | 7.0 |
| B. | 7.4 |
| C. | 7.8 |
| D. | 8.2 |
| Answer» C. 7.8 | |
| 429. |
The PH of pure water at 25°C, kw=1×10-4____________? |
| A. | 0 |
| B. | 7 |
| C. | 14 |
| D. | None of above |
| Answer» C. 14 | |
| 430. |
The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is_________________? |
| A. | 3 |
| B. | 2.7 |
| C. | 2 |
| D. | 1.5 |
| Answer» C. 2 | |
| 431. |
The PH of milk is __________? |
| A. | 6.0 |
| B. | 6.5 |
| C. | 7.0 |
| D. | 7.5 |
| Answer» C. 7.0 | |
| 432. |
The percentage of suspended solid waste in raw water is removed by coagulation is__________________? |
| A. | 60 |
| B. | 70 |
| C. | 80 |
| D. | 90 |
| Answer» D. 90 | |
| 433. |
The percentage of nitrogen in urea is________________? |
| A. | 36% |
| B. | 46% |
| C. | 56% |
| D. | 66% |
| Answer» C. 56% | |
| 434. |
The partial pressure exerted by the water vapours is called_______________? |
| A. | Surface tension |
| B. | Aqueous tension |
| C. | Vapour pressure |
| D. | Hydraulic pressure |
| Answer» C. Vapour pressure | |
| 435. |
The oxides of beryllium BeO is_______________? |
| A. | Acidic |
| B. | Basic |
| C. | Amphoteric |
| D. | Neutral |
| Answer» D. Neutral | |
| 436. |
The oxidation of isopropyl alcohol will yield___________________? |
| A. | propane |
| B. | Propanol |
| C. | Propanone |
| D. | Propanoic acid |
| Answer» D. Propanoic acid | |
| 437. |
The oxidation state of transition elements is usually _______________________? |
| A. | variable |
| B. | constant |
| C. | single |
| D. | infinite |
| Answer» B. constant | |
| 438. |
The oxidation number of central metal atom in [Ni(CO)4] is_________________? |
| A. | 0 |
| B. | 2 |
| C. | 4 |
| D. | 6 |
| Answer» D. 6 | |
| 439. |
The organic acid that can be made from ethanol is_________________? |
| A. | Acetic acid |
| B. | Formic acid |
| C. | Butanoic acid |
| D. | Citric acid |
| Answer» B. Formic acid | |
| 440. |
The organic compounds having very high molecular weight are called _________________? |
| A. | carboxylic acids |
| B. | ketones |
| C. | aldehydes |
| D. | polymers |
| Answer» E. | |
| 441. |
The organic acid that does not has COOH group is___________________? |
| A. | phthalic acid |
| B. | carbolic acid |
| C. | Maleic acid |
| D. | Succinic acid |
| Answer» C. Maleic acid | |
| 442. |
The ore CaSO4.H2O has the general name_______________? |
| A. | Gypsum |
| B. | Dolomite |
| C. | Calcite |
| D. | Plaster of Paris |
| Answer» B. Dolomite | |
| 443. |
The octane number of zero is assigned to____________? |
| A. | 2-methyl octane |
| B. | n-heptane |
| C. | iso-octane |
| D. | 3-methyl octane |
| Answer» C. iso-octane | |
| 444. |
The octet rule does not always hold for which of the following elements _________________? |
| A. | C |
| B. | O |
| C. | F |
| D. | P |
| Answer» E. | |
| 445. |
The O-O linkage is present in__________? |
| A. | H2S2O3 |
| B. | H2SO8 |
| C. | H2S4O6 |
| D. | H2 S2 O6 |
| Answer» C. H2S4O6 | |
| 446. |
The nutrients which are required in very small amount for the normal growth of plants are called_________________? |
| A. | nitrogenous fertilizers |
| B. | micronutrients |
| C. | phosphorus fertilizer |
| D. | all of the above |
| Answer» C. phosphorus fertilizer | |
| 447. |
The number of peaks obtained in mass spectrometry shows____________________? |
| A. | Relative abundance |
| B. | Average mass of element |
| C. | Number of isotopes |
| D. | Relative isotopic mass |
| Answer» D. Relative isotopic mass | |
| 448. |
The number of moles of CO2 which contains 16 g of oxygen is__________________? |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 1 |
| Answer» C. 0.75 | |
| 449. |
The number of isotopes of elements with even mass number and even atomic number are ________________? |
| A. | 280 |
| B. | 300 |
| C. | 154 |
| D. | 54 |
| Answer» D. 54 | |
| 450. |
The number of molecules taking part in the rate determining step is called___________________? |
| A. | Order of reaction |
| B. | Rate of reaction |
| C. | Mole of a reaction |
| D. | Extent of a reaction |
| Answer» B. Rate of reaction | |