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.
| 301. |
When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its? |
| A. | 0.115 |
| B. | 0.900 |
| C. | 0.015 |
| D. | 0.215 |
| Answer» B. 0.900 | |
| 302. |
What will be the pressure of 1 mole of an ideal gas maintained at 300 K and 250cm3 volume ? |
| A. | 98.5 atm |
| B. | 96.7 atm |
| C. | 95.8 atm |
| D. | 97.1 atm |
| Answer» B. 96.7 atm | |
| 303. |
What will be the order of reaction of a reaction whose rate can be expressed as R = K [A] [B] ? |
| A. | Zero |
| B. | One |
| C. | Two |
| D. | Three |
| Answer» D. Three | |
| 304. |
What is the simplest form of matter ? |
| A. | Gas |
| B. | Liquid |
| C. | Solid |
| D. | Semi solid |
| Answer» B. Liquid | |
| 305. |
What is the relative rate of effusion of CO and CO2 ? |
| A. | CO is 1.25 times faster than CO2 |
| B. | CO is 3.75 times faster than CO2 |
| C. | CO is 1.25 times faster than CO |
| D. | Both diffuse at the same rate |
| Answer» B. CO is 3.75 times faster than CO2 | |
| 306. |
What is the order of kinetics in the SN1 mechanism ? |
| A. | Zero |
| B. | First |
| C. | Second |
| D. | Third |
| Answer» C. Second | |
| 307. |
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 | |
| 308. |
What is the molecular weight of Ammonia (NH3) ________ ? |
| A. | 17.031 g/mol |
| B. | 18.031 g/mol |
| C. | 19.031 g/mol |
| D. | 27.033 g/mol |
| Answer» B. 18.031 g/mol | |
| 309. |
What is the molecular formula for Nitric acid ________ ? |
| A. | HNO2 |
| B. | HNO3 |
| C. | HN2O2 |
| D. | H2NO4 |
| Answer» C. HN2O2 | |
| 310. |
What is the molecular formula of Benzenetriozonide ? |
| A. | C6H6O9 |
| B. | C6H5O8 |
| C. | C6H5O9 |
| D. | C6H6O6 |
| Answer» B. C6H5O8 | |
| 311. |
What is the density ofargon gas at a temperature of 30°C and a pressure of 1.05 atm? |
| A. | 1.65 g/L |
| B. | 1.67 g/L |
| C. | 1.68 g/L |
| D. | None of the above |
| Answer» D. None of the above | |
| 312. |
What is the Chemical formula of Zinc Hydroxide _________ ? |
| A. | Zn(OH)2 |
| B. | ZNO2 |
| C. | Zn2(OH)3 |
| D. | ZnOH |
| Answer» B. ZNO2 | |
| 313. |
What is the abundant form of matter on earth ? |
| A. | Gas |
| B. | Liquid |
| C. | Solid |
| D. | Plasma |
| Answer» D. Plasma | |
| 314. |
What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3 ? |
| A. | 6 |
| B. | 4 |
| C. | 3 |
| D. | 2 |
| Answer» E. | |
| 315. |
What is clinker ? |
| A. | roasted calcareous material |
| B. | roasted argillaceous material |
| C. | roasted calcareous and argillaceous material |
| D. | roasted gypsum |
| Answer» D. roasted gypsum | |
| 316. |
What is chemical symbol for Tungsten? |
| A. | Z |
| B. | T |
| C. | Tn |
| D. | W |
| Answer» E. | |
| 317. |
What do we call to sudden expansion of plasma ? |
| A. | Avogadros law |
| B. | Grahams law of diffusion |
| C. | Joule Thompson effect |
| D. | Daltons law of partial pressure |
| Answer» D. Daltons law of partial pressure | |
| 318. |
What catalyst is employed when benzene is prepared from acetylene at 70°C? |
| A. | Cr2O3 + A2O3 + SiO2 |
| B. | Raney nickel |
| C. | Organo-nickel |
| D. | Ni 250 – 300°C |
| Answer» D. Ni 250 – 300°C | |
| 319. |
What are the metal bearing rocks called? |
| A. | Bitumen |
| B. | Bauxite |
| C. | Metalloids |
| D. | Ores |
| Answer» E. | |
| 320. |
Wavelength of electron was verified by_________________? |
| A. | Moseley |
| B. | Davisson and Germer |
| C. | Einstein |
| D. | Roentgen |
| Answer» C. Einstein | |
| 321. |
Water of crystallization can be removed by________________? |
| A. | drying |
| B. | heating |
| C. | evaporation |
| D. | All of the above |
| Answer» C. evaporation | |
| 322. |
Water molecule is________? |
| A. | V-shaped |
| B. | Angular |
| C. | Pyramidal |
| D. | Triangular planer |
| Answer» B. Angular | |
| 323. |
Water has maximum density at __________________? |
| A. | 0°C |
| B. | 2°C |
| C. | 4°C |
| D. | 100°C |
| Answer» D. 100°C | |
| 324. |
Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________? |
| A. | methanol |
| B. | methanol |
| C. | carbonic acid |
| D. | methane |
| Answer» C. carbonic acid | |
| 325. |
Water absorber used in combustion analysis is___________________? |
| A. | 50% KOH |
| B. | Lime water |
| C. | CaCl2 |
| D. | Mg (CIO4)2 |
| Answer» E. | |
| 326. |
Voltaic cell is a_________________? |
| A. | irreversible cell |
| B. | reversible cell |
| C. | alkaline cell |
| D. | all of the above |
| Answer» E. | |
| 327. |
Voltaic cell can be recharged by______________? |
| A. | by addition of fresh solution |
| B. | by replacing external circuit with external source of electricity |
| C. | by removal of solution |
| D. | by heating it |
| Answer» C. by removal of solution | |
| 328. |
Vinylacetylene combines with HCI to form___________________? |
| A. | polyacetylene |
| B. | benzene |
| C. | chloroprene |
| D. | divinyl acetylene |
| Answer» D. divinyl acetylene | |
| 329. |
Vinyl acetylene combines with hydrochloric acid produces___________________? |
| A. | Diviny1 acetylene |
| B. | Ethylidine dichloride |
| C. | Chloroprene |
| D. | 1 – 3 – 3 – trichloro butane |
| Answer» D. 1 – 3 – 3 – trichloro butane | |
| 330. |
Vapour pressure of water at 100°C is___________________? |
| A. | 55 mm Hg |
| B. | 760 mm Hg |
| C. | 355 mm Hg |
| D. | 1489 mm Hg |
| Answer» C. 355 mm Hg | |
| 331. |
Vapour pressure is not affected by_______________? |
| A. | Surface area |
| B. | temperature |
| C. | intermolecular forces |
| D. | atmospheric pressure |
| Answer» B. temperature | |
| 332. |
Vander Waals forces are stronger in_______________? |
| A. | F2 |
| B. | Cl2 |
| C. | Br2 |
| D. | I2 |
| Answer» E. | |
| 333. |
Upto ___________________ C atoms alkanes are gases? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» D. 6 | |
| 334. |
Unpaired electron in a molecule gives ______________ character ? |
| A. | Ferromagnetic |
| B. | Paramagnetic |
| C. | Diamagnetism |
| D. | Both A & B |
| Answer» C. Diamagnetism | |
| 335. |
Unit of rate of reaction is_________________? |
| A. | Moles dm-3 sec-1 |
| B. | Moles dm-3 |
| C. | Moles sec-1 |
| D. | Mol-1 dm3 sec-1 |
| Answer» B. Moles dm-3 | |
| 336. |
Unit of Kc is_______________? |
| A. | moles2dm+6 |
| B. | moles-2dm+6 |
| C. | moles+2dm-6 |
| D. | Kc may or may not have units |
| Answer» E. | |
| 337. |
Unit of heat in SI system is________________? |
| A. | J |
| B. | KCaL |
| C. | Cal |
| D. | GJ |
| Answer» B. KCaL | |
| 338. |
Unit of dipole moment is_________________? |
| A. | Debye |
| B. | Poise |
| C. | Pascal |
| D. | Newton |
| Answer» B. Poise | |
| 339. |
Under what conditions the gases deviate from the ideal behavior ? |
| A. | High temperature |
| B. | Low temperature |
| C. | High pressure |
| D. | B and C |
| Answer» E. | |
| 340. |
Two fundamental ways to transfer energy are________________? |
| A. | pressure and temperature |
| B. | pressure and volume |
| C. | heat and work |
| D. | heat and volume |
| Answer» D. heat and volume | |
| 341. |
True increasing order of acidity of the oxides of Mn is_________________? |
| A. | MnO < MnO2 < Mn2O7 |
| B. | Mn2O7 > MnO2 > MnO |
| C. | MnO2 > MnO > Mn2O7 |
| D. | MnO2 > Mn2O7 > MnO |
| Answer» C. MnO2 > MnO > Mn2O7 | |
| 342. |
Triglycerides are easily hydrolyzed by enzymes called_________________? |
| A. | Lyases |
| B. | Ligases |
| C. | Lipases |
| D. | Hydrolases |
| Answer» D. Hydrolases | |
| 343. |
Treatment of sucrose with conc. HNO3 gives__________? |
| A. | Nitrosucrose |
| B. | Glucose+ fructose |
| C. | Oxalic acid |
| D. | Laevulinic acid |
| Answer» B. Glucose+ fructose | |
| 344. |
Treating phenol with formaldehyde in the presence of dilute base forms Bakelite. The process involved is_________________? |
| A. | oxidation |
| B. | elimination |
| C. | condensation polymerization |
| D. | additional polymertization |
| Answer» D. additional polymertization | |
| 345. |
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 | |
| 346. |
Total energy of a system is_________________? |
| A. | P.E + K.E |
| B. | P.E + heat energy |
| C. | K.E + heat energy |
| D. | P.E + mechanical energy |
| Answer» B. P.E + heat energy | |
| 347. |
Tincal is a mineral of___________________? |
| A. | A1 |
| B. | Si |
| C. | B |
| D. | C |
| Answer» D. C | |
| 348. |
Three quantum number have been derived from equation of____________________? |
| A. | de-Broglie |
| B. | Plancks |
| C. | Schrodinger |
| D. | Heisenberg |
| Answer» D. Heisenberg | |
| 349. |
Three elements needed for the healthy growth of plants are_________________? |
| A. | N P K |
| B. | N K C |
| C. | N S P |
| D. | N Ca P |
| Answer» B. N K C | |
| 350. |
The yellow colour in photochemical smog is due to presence of__________________? |
| A. | dinitrogen oxide |
| B. | nitrogen dioxide |
| C. | chlorine gas |
| D. | chlorine dioxide |
| Answer» C. chlorine gas | |