MCQOPTIONS
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MCQOPTIONS
This section includes 1262 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
Which of the following orbitals has maximum penetration effect? |
| A. | S |
| B. | P |
| C. | d |
| D. | f |
| Answer» B. P | |
| 452. |
Pressure remain constant, at which temperature the volume of gas becomes twice of what it is at 0°C? |
| A. | 546 °C |
| B. | 546 K |
| C. | 200°C |
| D. | 273 K |
| Answer» C. 200°C | |
| 453. |
Presence of nitrogen in organic compounds is tested as__________? |
| A. | Nitrogen gas |
| B. | NH3 |
| C. | CN‾ |
| D. | NO |
| Answer» D. NO | |
| 454. |
Which of the following gases shows more ideal behaviour at 0°C___________? |
| A. | H2 |
| B. | CH4 |
| C. | He |
| D. | NH3 |
| Answer» D. NH3 | |
| 455. |
Azimuthal quantum number defines___________? |
| A. | e/m ratio of an electron |
| B. | Spin of an electron |
| C. | Angular momentum of an electron |
| D. | Magnetic momentum of an electron |
| Answer» D. Magnetic momentum of an electron | |
| 456. |
In a closed vessel, a gas is heated from 300K to 600 K. The kinetic energy becomes__________? |
| A. | Double |
| B. | Same |
| C. | Half |
| D. | Four times |
| Answer» B. Same | |
| 457. |
The PH of milk is __________? |
| A. | 6.0 |
| B. | 6.5 |
| C. | 7.0 |
| D. | 7.5 |
| Answer» C. 7.0 | |
| 458. |
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 | |
| 459. |
Consider the following reaction- 3Cl2 + 6NaOH ? NaClO3 + 5NaCl + 3H2O This reaction is_______________? |
| A. | Displacement reaction |
| B. | Double displacement reaction |
| C. | Disproportionation reaction |
| D. | Reduction reaction |
| Answer» D. Reduction reaction | |
| 460. |
The PH of the 1.3 × 10-4 NH4Cl is__________? |
| A. | 1.3 |
| B. | 4.0 |
| C. | 2.886 |
| D. | 3.886 |
| Answer» E. | |
| 461. |
The IUPAC name of HCONH2 is___________? |
| A. | Methanamide |
| B. | Methanoylamine |
| C. | Aminoethanol |
| D. | Formanide |
| Answer» B. Methanoylamine | |
| 462. |
The bond length of C=C is___________? |
| A. | 1.20A° |
| B. | 1.34A° |
| C. | 1.54A° |
| D. | 1.68A° |
| Answer» E. | |
| 463. |
The stationary and mobile phases in paper chromatography are____________? |
| A. | Liquid/liquid |
| B. | Solid/liquid |
| C. | Liquid/solid |
| D. | Liquid/gas |
| Answer» C. Liquid/solid | |
| 464. |
Beillstein test is used for________? |
| A. | Cl |
| B. | N2 |
| C. | CO2 |
| D. | CO |
| Answer» B. N2 | |
| 465. |
The molar mass of an organic acids is determined by____________? |
| A. | Depression of freezing point |
| B. | Volumetric method |
| C. | Victor Meyer’s method |
| D. | Osmosis method |
| Answer» C. Victor Meyer’s method | |
| 466. |
_____________ surfactants perform well over a wide range water hardness and PH? |
| A. | Anionic |
| B. | Cationic |
| C. | Nonionic |
| D. | Neutral |
| Answer» D. Neutral | |
| 467. |
The IUPAC name of ethylene oxide is__________? |
| A. | Epoxy methane |
| B. | Oxoethene |
| C. | Methoxymethane |
| D. | Oxirane |
| Answer» C. Methoxymethane | |
| 468. |
The IUPAC suffix used for _______ NC group? |
| A. | Cyanide |
| B. | Isocyanides |
| C. | Nitrile |
| D. | Carbylamines |
| Answer» D. Carbylamines | |
| 469. |
If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called_________? |
| A. | Annealing |
| B. | Quenching |
| C. | Tempering |
| D. | Nitriding |
| Answer» B. Quenching | |
| 470. |
Polyethylene Glycols are used in the preparation of which type of detergents? |
| A. | Cationic detergents |
| B. | Anionic detergents |
| C. | Non-ionic detergents soap |
| D. | All of above |
| Answer» D. All of above | |
| 471. |
Which of the following is soluble in water? |
| A. | AgF |
| B. | AgCl |
| C. | AgBr |
| D. | AgI |
| Answer» B. AgCl | |
| 472. |
Carbon in wrought iron is present as_________? |
| A. | Silicon carbide |
| B. | Iron carbide |
| C. | Graphite |
| D. | Partly as iron carbide and partly as graphite |
| Answer» C. Graphite | |
| 473. |
Commercial detergents contain mainly _____________? |
| A. | RCOON |
| B. | RONa |
| C. | RSNa |
| D. | ROsO3Na |
| Answer» B. RONa | |
| 474. |
The substance used in cancer therapy is___________? |
| A. | Fe |
| B. | Co |
| C. | Ni |
| D. | Rn |
| Answer» C. Ni | |
| 475. |
The science of fermentation is called _______ ? |
| A. | Zygology |
| B. | Zymology |
| C. | Zymurgy |
| D. | Zootaxy |
| Answer» C. Zymurgy | |
| 476. |
Transition elements, in general, exhibit the following properties, except one. Name that property? |
| A. | Variable oxidation state |
| B. | Natural Radioactivity |
| C. | Tendency to form complexes |
| D. | Formation of alloys |
| Answer» C. Tendency to form complexes | |
| 477. |
The absolute value of charge on electron was determined by ________ ? |
| A. | J.J.Thomson |
| B. | Chadwick |
| C. | Rutherford |
| D. | Robert Millikan |
| Answer» E. | |
| 478. |
Which of the following alloys contain(s) Cu and Zn? |
| A. | Bronze |
| B. | Brass |
| C. | Gun-metal |
| D. | Type metal |
| Answer» C. Gun-metal | |
| 479. |
The bond angle between hybrid orbitals in methane CH3 is___________? |
| A. | 115.5° |
| B. | 109.5° |
| C. | 105. 7° |
| D. | 180° |
| Answer» C. 105. 7° | |
| 480. |
What is the molecular formula for Nitric acid ________ ? |
| A. | HNO2 |
| B. | HNO3 |
| C. | HN2O2 |
| D. | H2NO4 |
| Answer» C. HN2O2 | |
| 481. |
What is the molecular Weight of Nitric acid (HNO3 ) ? |
| A. | 63.012 g/mol |
| B. | 65.012 g/mol |
| C. | 70.012 g/mol |
| D. | 81.011 g/mol |
| Answer» B. 65.012 g/mol | |
| 482. |
The discovery of neutron became very late because _______ ? |
| A. | It does not carry any charge |
| B. | It does not move |
| C. | It is a fundamental particle |
| D. | It is present in nucleus |
| Answer» B. It does not move | |
| 483. |
The Branch of chemistry dealing with brewing and distilling is called _______ ? |
| A. | Zygology |
| B. | Zymology |
| C. | Zymurgy |
| D. | Zootaxy |
| Answer» D. Zootaxy | |
| 484. |
Which of the following noble gases is abundant in air? |
| A. | Neon |
| B. | Helium |
| C. | Argon |
| D. | Methane |
| Answer» D. Methane | |
| 485. |
Which compound shows hydrogen bonding ? |
| A. | C2H6 |
| B. | C2H5Cl |
| C. | CH3OCH3 |
| D. | C2H5OH |
| Answer» E. | |
| 486. |
Which one of the following compound does not have – OH group___________________? |
| A. | ethylene glycol |
| B. | glycerol |
| C. | picric acid |
| D. | ethyl acetate |
| Answer» E. | |
| 487. |
Which law states that “equal volumes of all gases, at the same temperature and pressure, have the same number of molecules? |
| A. | Boyle’s law |
| B. | Charles’ law |
| C. | Gay-Lussac’s law |
| D. | Avogadro’s law |
| Answer» E. | |
| 488. |
When phenol is heated with concentrated nitric acid the product is________________? |
| A. | Picric acid |
| B. | o-nitrophenol |
| C. | 1 3 5 -trinitro benzene |
| D. | p-nitrophenol |
| Answer» B. o-nitrophenol | |
| 489. |
Which compound is also known by the name of carbolic acid ? |
| A. | C2H2OH |
| B. | H2CO3 |
| C. | C6H5OH |
| D. | H3PO3 |
| Answer» D. H3PO3 | |
| 490. |
Methyl alcohol is not used__________________? |
| A. | As a solvent |
| B. | As an antifreezing agent |
| C. | As a substitute for petrol |
| D. | For denaturing of ethyl alcohol |
| Answer» D. For denaturing of ethyl alcohol | |
| 491. |
When alcohol reacts with phosphorous halides it geive____________________? |
| A. | alkyl halides |
| B. | alkyl amine |
| C. | alkanes |
| D. | alkynes |
| Answer» B. alkyl amine | |
| 492. |
An alcohol which can be prepared by fermentation is_________________? |
| A. | CH3OH |
| B. | C3H7OH |
| C. | CH3 – CH2 – OH |
| D. | C6H5OH |
| Answer» D. C6H5OH | |
| 493. |
Ethers show functional group isomerism with __________________? |
| A. | aldehydes |
| B. | ketones |
| C. | alcohols |
| D. | carboxylic acid |
| Answer» D. carboxylic acid | |
| 494. |
For a given mass of a gas at constant temperature, if the value V becomes 3 times, the pressure will becomes__________? |
| A. | 3P |
| B. | P/3 |
| C. | 3P/T |
| D. | 6P |
| Answer» C. 3P/T | |
| 495. |
Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate ? |
| A. | Primary alcohol |
| B. | Secondary alcohol |
| C. | Tertiary alcohol |
| D. | All of above |
| Answer» D. All of above | |
| 496. |
Phenol was isolated by Runge from________________? |
| A. | vegetable oil |
| B. | coaltar |
| C. | wood |
| D. | none of these |
| Answer» C. wood | |
| 497. |
The hydrogenation of phenol in the presence of Ni and heat gives_________________? |
| A. | cyclohexane |
| B. | n – hexane |
| C. | 1 – hexanol |
| D. | cyclohexanol |
| Answer» E. | |
| 498. |
Which one of the following is also known as lactic acid ? |
| A. | 3-Hydroxy propanoic acid |
| B. | 2-Hydroxy propanoic acid |
| C. | 2-hydroxy butanoic acid |
| D. | 3-hydroxy butanoic acid |
| Answer» C. 2-hydroxy butanoic acid | |
| 499. |
The residue obtained after the crystallization of sugar from concentrated sugar cane juice is called__________________? |
| A. | Mother liquor |
| B. | Filterate |
| C. | Extract |
| D. | Molasses |
| Answer» E. | |
| 500. |
Ethanol and methanol can be distinguished by a__________________? |
| A. | Iodoform test |
| B. | Lucas test |
| C. | Benedicts test |
| D. | Tollens test |
| Answer» B. Lucas test | |