MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 335 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
The particles of matter are joined together was first proposed in 1685 by |
| A. | JJ Thomson |
| B. | Isaac Newton |
| C. | none |
| D. | Lewis |
| Answer» C. none | |
| 152. |
Down the group the electrical conductivity |
| A. | decreases |
| B. | increases |
| C. | constant |
| D. | same |
| Answer» C. constant | |
| 153. |
Electron affinity is the measure of the attraction of the nucleus of an atom for the |
| A. | same electron |
| B. | 1st electron |
| C. | 2nd electron |
| D. | extra electron |
| Answer» E. | |
| 154. |
The surface area to come in contact with the neighboring molecules is smaller in |
| A. | pentane |
| B. | 2,2 dimethyl propane |
| C. | ethane |
| D. | Methane |
| Answer» C. ethane | |
| 155. |
The character of bonds which are formed between similar atoms are |
| A. | polar |
| B. | non-polar |
| C. | neutral |
| D. | none |
| Answer» C. neutral | |
| 156. |
In the period from left to right the ionization energy is |
| A. | increase |
| B. | decrease |
| C. | remain same |
| D. | none |
| Answer» B. decrease | |
| 157. |
The number of stable chemical bonds formed by noble gases is |
| A. | very few |
| B. | moderate |
| C. | large |
| D. | very large |
| Answer» B. moderate | |
| 158. |
Hydrated Aluminum Chloride exists as |
| A. | AlCl3 |
| B. | Al2Cl3 |
| C. | All of Above |
| D. | Al2Cl6 |
| Answer» B. Al2Cl3 | |
| 159. |
The name given to ions containing oxygen are usually called as |
| A. | oxides |
| B. | oxalates |
| C. | phages |
| D. | ates |
| Answer» E. | |
| 160. |
For gaining stability element tend to get the configuration of |
| A. | nearest halogen |
| B. | nearest alkali metal |
| C. | nearest noble gases |
| D. | nearest transition metal |
| Answer» D. nearest transition metal | |
| 161. |
The increase in the atomic number is associated with increase in the |
| A. | nuclear charge |
| B. | proton charge |
| C. | neutron charge |
| D. | electron charge |
| Answer» B. proton charge | |
| 162. |
The strongest pull in a covalent bond is provided by Halogen |
| A. | Cl |
| B. | F |
| C. | I |
| D. | Br |
| Answer» C. I | |
| 163. |
From left to right in a period the shielding effect remains |
| A. | same |
| B. | different |
| C. | increase |
| D. | decrease |
| Answer» B. different | |
| 164. |
Plants become more susceptible to diseases and pests because |
| A. | leaves becoming yellow due to leaching out of nitrogen |
| B. | of acids from the acid rain |
| C. | of floods |
| D. | waxy layer on leaves becoming damaged causing increased transpiration |
| Answer» E. | |
| 165. |
The oxidation number of Period 3 element arises until |
| A. | P |
| B. | Al |
| C. | Si |
| D. | S |
| Answer» E. | |
| 166. |
The sum of radii of two ions is |
| A. | 318pm |
| B. | 314pm |
| C. | 313pm |
| D. | 312pm |
| Answer» C. 313pm | |
| 167. |
The ionic bond is formed by the complete transfer of electron form atom with low ionization energy to another atom with high electron affinity ,it is theory of |
| A. | Nylholm |
| B. | Lewis |
| C. | bohar |
| D. | Gillespic |
| Answer» C. bohar | |
| 168. |
Keeping in mind the ethane molecule, which statement is incorrect? |
| A. | Two hydrogen atoms share a pair of electrons with each other. |
| B. | A double covalent bond is formed. |
| C. | Each carbon atom shares 2 pairs of electrons with each other. |
| D. | Two hydrogen atoms share a pair of electrons with carbon atom. |
| Answer» B. A double covalent bond is formed. | |
| 169. |
K and Cl ions arrange themselves to form a |
| A. | diamond |
| B. | crystal lattice |
| C. | graphite |
| D. | thick cloud |
| Answer» C. graphite | |
| 170. |
The electro negativity values of elements is calculated by |
| A. | bohar |
| B. | Paul |
| C. | Zeeman |
| D. | stalk |
| Answer» C. Zeeman | |
| 171. |
The elements having high ionization energies are |
| A. | ion |
| B. | nonmetals |
| C. | metals |
| D. | atom |
| Answer» C. metals | |
| 172. |
The energy released when an electron adds to an empty orbital of an isolated gaseous atom is |
| A. | electron affinity |
| B. | ionization energy |
| C. | atomic energy |
| D. | none |
| Answer» B. ionization energy | |
| 173. |
From top to bottom in a group of the periodic table the atomic radii |
| A. | decrease |
| B. | increase |
| C. | remain same |
| D. | none |
| Answer» C. remain same | |
| 174. |
The atomic number of sodium is |
| A. | 12 |
| B. | 15 |
| C. | 16 |
| D. | 11 |
| Answer» E. | |
| 175. |
The electro negativity of sodium atom is |
| A. | 0.6 |
| B. | 0.9 |
| C. | 0.7 |
| D. | 0.8 |
| Answer» C. 0.7 | |
| 176. |
C=C has a high electron density area hence it is |
| A. | polar |
| B. | non-polar |
| C. | stable |
| D. | unreactive |
| Answer» B. non-polar | |
| 177. |
The atomic number of oxygen is |
| A. | 6 |
| B. | 7 |
| C. | 8 |
| D. | 19 |
| Answer» D. 19 | |
| 178. |
At least one benzene ring is present in compounds of |
| A. | acryl |
| B. | aryl |
| C. | ketone |
| D. | carboxylic |
| Answer» C. ketone | |
| 179. |
The electro negativity of potassium atom is |
| A. | 0.7 |
| B. | 0.6 |
| C. | 0.8 |
| D. | 0.9 |
| Answer» D. 0.9 | |
| 180. |
The complete transfer of one or more electrons between atoms constitutes the |
| A. | covalent bond |
| B. | ionic bond |
| C. | none |
| D. | co-ordinate covalent bond |
| Answer» C. none | |
| 181. |
The electron affinity of hydrogen atom is |
| A. | −73 |
| B. | −72 |
| C. | −71 |
| D. | −74 |
| Answer» B. −72 | |
| 182. |
According to modern theory of chemical bounding the level of energy in bonds formed from atoms is |
| A. | increases |
| B. | decreases |
| C. | both |
| D. | none |
| Answer» C. both | |
| 183. |
In the fluorine the incoming electrons are repel by the |
| A. | thick cloud |
| B. | outer most shell |
| C. | nucleus |
| D. | atomic radii |
| Answer» B. outer most shell | |
| 184. |
The unit of electro negativity is |
| A. | one |
| B. | two |
| C. | none |
| D. | three |
| Answer» D. three | |
| 185. |
The amount of energy released during the formation of KCl crystal lattice is |
| A. | 691kJmol |
| B. | 692kJmol |
| C. | 690kJmol |
| D. | 693kJmol |
| Answer» D. 693kJmol | |
| 186. |
Fossils with sulfur burn to produce |
| A. | sulfur oxides |
| B. | sulfur dioxide |
| C. | sulfur |
| D. | sulfide |
| Answer» C. sulfur | |
| 187. |
Those elements which have intermediate values of ionization energies are mostly |
| A. | metals |
| B. | nonmetals |
| C. | metalloids |
| D. | magnet |
| Answer» D. magnet | |
| 188. |
The specific Redox reaction of chlorine is called as |
| A. | oxidation |
| B. | Disproportionation |
| C. | none |
| D. | reduction |
| Answer» C. none | |
| 189. |
The electro negativity is related to the ionization energy of element and |
| A. | dipole moment |
| B. | proton moment |
| C. | electron moment |
| D. | neutron moment |
| Answer» B. proton moment | |
| 190. |
In the period from left to right the electron affinity of elements |
| A. | increases |
| B. | decreases |
| C. | neutral |
| D. | none |
| Answer» B. decreases | |
| 191. |
Upon oxidation, barium compounds give |
| A. | scarlet color |
| B. | brick red color |
| C. | apple green color |
| D. | violet color |
| Answer» D. violet color | |
| 192. |
In car engine the combustion of octane is done in |
| A. | air |
| B. | petrol |
| C. | gear oil |
| D. | radiator fluid |
| Answer» C. gear oil | |
| 193. |
Consider the reaction: Al2O3+H2SO4 → Al2(SO4)3 + H2O. How many moles of H2SO4 will be required to balance the equation? |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» E. | |
| 194. |
Consider the reaction: Al(s) + O2 (g) → Al2O3. How many moles of oxygen will be needed to balance the equation? |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» E. | |
| 195. |
The probability distribution of electrons can be affected by |
| A. | far atoms |
| B. | near atoms |
| C. | no atoms |
| D. | neighboring atoms |
| Answer» E. | |
| 196. |
The sign given to the electron affinity is |
| A. | positive |
| B. | negative |
| C. | neutral |
| D. | no sign |
| Answer» C. neutral | |
| 197. |
After conversion of Na+ ion the radius of Na atom reduces from |
| A. | 186pm to 95pm |
| B. | 185pm to 95pm |
| C. | 186pm to 96pm |
| D. | 187pm to 94pm |
| Answer» B. 185pm to 95pm | |
| 198. |
The elements tend to get 8 electrons in the outermost shell ,this is known as |
| A. | doublet rule |
| B. | octet rule |
| C. | triplet rule |
| D. | quadrat rule |
| Answer» C. triplet rule | |
| 199. |
The distance of 75.4pm where attractive forces dominate the repulsive forces that distance is called |
| A. | bond distance |
| B. | bond length |
| C. | compromise distance |
| D. | all of above |
| Answer» E. | |
| 200. |
The size of ionic radius of cation as compared to atomic radius of cation is |
| A. | larger |
| B. | smaller |
| C. | same |
| D. | none |
| Answer» C. same | |