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.
| 151. |
The ttractive forces between the partial positive end of one molecule and partial negative end of other molecule are called________________? |
| A. | Dipole-dipole forces |
| B. | Ion dipole-dipole forces |
| C. | London dispersion forces |
| D. | Debye forces |
| Answer» B. Ion dipole-dipole forces | |
| 152. |
Bucky balls is an allotropic from of__________________? |
| A. | Sulphur |
| B. | Carbon |
| C. | Silica |
| D. | Tin |
| Answer» C. Silica | |
| 153. |
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 | |
| 154. |
Water has maximum density at __________________? |
| A. | 0°C |
| B. | 2°C |
| C. | 4°C |
| D. | 100°C |
| Answer» D. 100°C | |
| 155. |
________________ is study about energy of a chemical system ? |
| A. | thermochemistry |
| B. | thermodynamics |
| C. | chemical kinetics |
| D. | stoichiometry |
| Answer» B. thermodynamics | |
| 156. |
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 | |
| 157. |
Which one is not true about cathode rays ? |
| A. | 9.11×10-31 Kg |
| B. | Cast shadow |
| C. | Heat up the platinum foil |
| D. | Cannot ionize |
| Answer» E. | |
| 158. |
Vapour pressure is not affected by_______________? |
| A. | Surface area |
| B. | temperature |
| C. | intermolecular forces |
| D. | atmospheric pressure |
| Answer» B. temperature | |
| 159. |
Formation of vapours from the surface of a liquid is called________________? |
| A. | vapourization |
| B. | evaporation |
| C. | condensation |
| D. | cracking |
| Answer» C. condensation | |
| 160. |
Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to_________________? |
| A. | More strength of H-bonding |
| B. | More strength of London forces |
| C. | Less polarizability |
| D. | All of the above |
| Answer» C. Less polarizability | |
| 161. |
Table salt crystallizes with a______________________? |
| A. | Face centered cubic lattice |
| B. | body centered cubic lattice |
| C. | simple cubic lattice |
| D. | othorhombic lattice |
| Answer» C. simple cubic lattice | |
| 162. |
Amorphous substances posses_________________? |
| A. | No definite geometry |
| B. | No definite heat of fusion |
| C. | No sharp melting points |
| D. | All of the above |
| Answer» D. All of the above | |
| 163. |
Isomorphic substances have _______________? |
| A. | Same physical and chemical properties |
| B. | Same physical and different chemical properties |
| C. | Different physical and same chemical properties |
| D. | Different physical and chemical properties |
| Answer» E. | |
| 164. |
Steam causes more sever burn than the boiling water because it possesses _________________? |
| A. | Latent heat of fusion |
| B. | Latent heat of vaporization |
| C. | Latent heat of sublimation |
| D. | All of the above |
| Answer» C. Latent heat of sublimation | |
| 165. |
Which one of the following does not show hydrogen bonding? |
| A. | Water |
| B. | Ethyl alcohol |
| C. | Phenol |
| D. | Diethyl ether |
| Answer» E. | |
| 166. |
Which one is a conductor but is not malleable ? |
| A. | Iron |
| B. | Graphite |
| C. | Silver |
| D. | Platinum |
| Answer» C. Silver | |
| 167. |
The density of water may be__________________? |
| A. | Equal to that of ice |
| B. | Greater than that of ice |
| C. | Less than that of ice |
| D. | All are possible |
| Answer» C. Less than that of ice | |
| 168. |
Molar heat of vaporization of water is_________________? |
| A. | 40.7 KJ/mole |
| B. | 40.7 J/mole |
| C. | 40.7 cal/mole |
| D. | 40.7 Kcal/mole |
| Answer» B. 40.7 J/mole | |
| 169. |
Crystalline solids can be identified easily from their ___________________? |
| A. | Sharp melting point |
| B. | Definite geometry |
| C. | Transition temperature |
| D. | Colour |
| Answer» B. Definite geometry | |
| 170. |
Crystallites are present in_________________? |
| A. | crystalline solids |
| B. | amorphous solids |
| C. | liquid crystals |
| D. | all of the above |
| Answer» C. liquid crystals | |
| 171. |
A malleable solid is one which can be_________________? |
| A. | Converted into wires |
| B. | Converted into thin sheets |
| C. | Melted easily |
| D. | All of the above |
| Answer» C. Melted easily | |
| 172. |
The maximum number of electron in a sub shell with ? = 3fs______________? |
| A. | 6 |
| B. | 10 |
| C. | 14 |
| D. | 18 |
| Answer» D. 18 | |
| 173. |
The viscosity of solids is________________? |
| A. | Infinite |
| B. | Negligible |
| C. | Medium |
| D. | No concept of viscosity in solid |
| Answer» B. Negligible | |
| 174. |
Spectrum is produced due to________________? |
| A. | Different wavelength |
| B. | Different colours |
| C. | Different intensities |
| D. | all have little contribution |
| Answer» B. Different colours | |
| 175. |
The magnetic quantum number (QN) has its values determined directly by the value of_______________? |
| A. | Principal (QN) |
| B. | Azimuthal (QN) |
| C. | Spin (QN) |
| D. | Both A & B |
| Answer» C. Spin (QN) | |
| 176. |
Which solids are called true solids _______________? |
| A. | Metallic |
| B. | Amorphous |
| C. | Crystalline |
| D. | Vitreous |
| Answer» D. Vitreous | |
| 177. |
When an atom absorbs energy the lines in the spectrum will appear which are_________________? |
| A. | Brighter |
| B. | Darker |
| C. | Colourless |
| D. | Hard to locate |
| Answer» C. Colourless | |
| 178. |
The value of e/m ratio of electron is________________? |
| A. | 6.02 x 1023 C/kg |
| B. | 1.7588 x 1020 C/kg |
| C. | 9.1095 x 10-31 C/kg |
| D. | 1.7588 x 1011 C/kg |
| Answer» E. | |
| 179. |
Branch of chemistry that deals with the complete qualitative and quantitative analysis of a substance is___________________? |
| A. | Stoichio chemistry |
| B. | Physical chemistry |
| C. | Analytical chemistry |
| D. | Quantum chemistry |
| Answer» D. Quantum chemistry | |
| 180. |
The correct electronic configuration of Cu is ___________________? |
| A. | [Ar]4s1 |
| B. | [Ar]4s2 |
| C. | [Ar]3d104s1 |
| D. | [Ar]3d94s2 |
| Answer» D. [Ar]3d94s2 | |
| 181. |
Planks theory says energy is emitted__________________? |
| A. | In continuous manner |
| B. | Discontinuous manner |
| C. | Simultaneously |
| D. | In the form of heat |
| Answer» C. Simultaneously | |
| 182. |
2nd orbit is ___________ away from nucleus of H-atom as compared to 1st orbit is ? |
| A. | 2-times |
| B. | 3-times |
| C. | 4-times |
| D. | 6 times |
| Answer» D. 6 times | |
| 183. |
Atom cannot be divided into simple unitstheorized by________________? |
| A. | Rutherford |
| B. | Dalton |
| C. | Bohr |
| D. | Schrodinger |
| Answer» C. Bohr | |
| 184. |
The number of fundamental particles in an atom of the lightest isotope carbon are_______________? |
| A. | 6 |
| B. | 12 |
| C. | 18 |
| D. | 20 |
| Answer» D. 20 | |
| 185. |
Charge of electron was measured by__________________? |
| A. | J.J Thomson |
| B. | Millikan |
| C. | Rutherford |
| D. | Perrin |
| Answer» C. Rutherford | |
| 186. |
The maximum number of orbitals present in a subshell that is represented by Azimuthal quantum number = 3 will be________________? |
| A. | 1 |
| B. | 3 |
| C. | 5 |
| D. | 7 |
| Answer» E. | |
| 187. |
Free neutron changes into proton with the emission of__________________? |
| A. | Neutrino |
| B. | Electron |
| C. | Both A & B |
| D. | Meson |
| Answer» D. Meson | |
| 188. |
Rutherford bombarded _________________ particles in discovery of nucleus? |
| A. | Gamma-rays |
| B. | Alpha-rays |
| C. | Beta-rays |
| D. | X-rays |
| Answer» C. Beta-rays | |
| 189. |
Quantum number which tells the energy of electron is________________? |
| A. | n |
| B. | 1 |
| C. | m |
| D. | s |
| Answer» B. 1 | |
| 190. |
The solid which is left over the filter paper as a result of filtration_________________? |
| A. | Insoluble particles |
| B. | residue |
| C. | crystals |
| D. | mud |
| Answer» C. crystals | |
| 191. |
Estimation of amounts of different components in a sample is________________? |
| A. | Quantitative analysis |
| B. | Qualitative analysis |
| C. | Stochiometery |
| D. | Physical chemistry |
| Answer» B. Qualitative analysis | |
| 192. |
Centrifugal forces are balanced in atom by__________________? |
| A. | Attractive forces |
| B. | Repulsive force |
| C. | Electrons |
| D. | Neutrons |
| Answer» B. Repulsive force | |
| 193. |
_______________ can expel proteons from paraffins ? |
| A. | Electron |
| B. | Positron |
| C. | Neutron |
| D. | None of above has such capability |
| Answer» D. None of above has such capability | |
| 194. |
In CCI4 I2 shows________________? |
| A. | Red colour |
| B. | Purple colour |
| C. | Blue colour |
| D. | Yellow colour |
| Answer» C. Blue colour | |
| 195. |
Direct conversion of solids into vapours is called ___________________? |
| A. | Solvent extraction |
| B. | sublimation |
| C. | crystallization |
| D. | vaporization |
| Answer» C. crystallization | |
| 196. |
When electron jump into orbit 1 then series obtained is___________________? |
| A. | Lyman |
| B. | Paschen |
| C. | Pfund |
| D. | Brackett |
| Answer» B. Paschen | |
| 197. |
A process controlled by Distributive law is__________________? |
| A. | Crystallization |
| B. | Sublimation |
| C. | Solvent extraction |
| D. | Filtration |
| Answer» D. Filtration | |
| 198. |
The technique used to separate components of mixture in solid phase ? |
| A. | Crystallization |
| B. | Filtration |
| C. | Sublimation |
| D. | Solvent extraction |
| Answer» D. Solvent extraction | |
| 199. |
Gooch Crucibles are made up of________________? |
| A. | plastic |
| B. | fibre |
| C. | porcelain |
| D. | steel |
| Answer» D. steel | |
| 200. |
Crystallization does not involve_______________? |
| A. | heating |
| B. | sublimation |
| C. | cooling |
| D. | vaporization |
| Answer» C. cooling | |