MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 402 Mcqs, each offering curated multiple-choice questions to sharpen your UPSEE knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
Covalent compounds are poor conductors of electricity because |
| A. | they do not have ions |
| B. | the molecules cannot carry electricity |
| C. | because they contain non-metals only |
| D. | both a and b |
| Answer» E. | |
| 202. |
Shielding effect is also called |
| A. | stark effect |
| B. | screening effect |
| C. | Zeeman effect |
| D. | reflective effect |
| Answer» C. Zeeman effect | |
| 203. |
Enthalpy changes are due to |
| A. | breaking bonds only |
| B. | forming bonds only |
| C. | ionic bonds |
| D. | braking and forming bonds |
| Answer» E. | |
| 204. |
The order of electronegativity in Br₂, Cl₂, N₂, O₂, F₂ is |
| A. | increasing |
| B. | decreasing |
| C. | falling |
| D. | constant |
| Answer» B. decreasing | |
| 205. |
Sodium and calcium react with water and they do not dissolve in |
| A. | water |
| B. | acid |
| C. | alkalis |
| D. | alcohol |
| Answer» B. acid | |
| 206. |
The bond energy of C-O bond is |
| A. | 350 kJ/mol |
| B. | 610kJ/mol |
| C. | 360kJ/mol |
| D. | 740kJ/mol |
| Answer» D. 740kJ/mol | |
| 207. |
Diamond is an example of |
| A. | ionic bonds |
| B. | covalent bonds |
| C. | metallic bonds |
| D. | dative bonds |
| Answer» C. metallic bonds | |
| 208. |
In formic an ionic bond Magnesium Oxide (MgO), Magnesium |
| A. | loses 1 electron |
| B. | loses 2 electrons |
| C. | gains 1 electron |
| D. | gains 2 electros |
| Answer» C. gains 1 electron | |
| 209. |
Metals are solids, except |
| A. | helium |
| B. | selenium |
| C. | mercury |
| D. | Potassium |
| Answer» D. Potassium | |
| 210. |
In ethane, C₂H₄ |
| A. | 4 π-bond is formed |
| B. | 1 π-bond is formed |
| C. | 2 π-bonds are formed |
| D. | 3 π-bonds are formed |
| Answer» C. 2 π-bonds are formed | |
| 211. |
Ionic radius for elements of group number VA to VIIA is formed by |
| A. | negative ions |
| B. | neutral ions |
| C. | normal atom |
| D. | neutral ion |
| Answer» B. neutral ions | |
| 212. |
In polarization, positive side attracts the |
| A. | negative side of the water molecules |
| B. | the positive side of the water molecules |
| C. | the substance dissolves completely in water |
| D. | metals of group VII |
| Answer» B. the positive side of the water molecules | |
| 213. |
Examples of refractory materials include |
| A. | MgO |
| B. | LiCl |
| C. | KF |
| D. | CaCl₂ |
| Answer» B. LiCl | |
| 214. |
Carbon monoxide is |
| A. | polar |
| B. | reactive with oxygen |
| C. | reducing agent |
| D. | all of above |
| Answer» E. | |
| 215. |
Ionic and covalent bonds requires a lot of energy to break them because they are very |
| A. | strong |
| B. | volatile |
| C. | weak |
| D. | efficient |
| Answer» B. volatile | |
| 216. |
The bond energy of the C=C bond is |
| A. | 350 kJ/mol |
| B. | 610kJ/mol |
| C. | 360kJ/mol |
| D. | 740kJ/mol |
| Answer» C. 360kJ/mol | |
| 217. |
Two clouds of electrons in a π-bond represent |
| A. | one bond of two electrons |
| B. | two bonds of 4 electrons |
| C. | three bonds with 6 electrons |
| D. | four bonds with 8 electrons |
| Answer» B. two bonds of 4 electrons | |
| 218. |
Atomic number of chromium is |
| A. | 25 |
| B. | 24 |
| C. | 26 |
| D. | 27 |
| Answer» C. 26 | |
| 219. |
Difference in electro negativity values of bonded atoms is an index to polar nature of the |
| A. | covalent bond |
| B. | ionic bond |
| C. | double covalent bond |
| D. | hydrogen bond |
| Answer» B. ionic bond | |
| 220. |
The bond energy of a C-C bond is |
| A. | 350 kJ/mol |
| B. | 610kJ/mol |
| C. | 360kJ/mol |
| D. | 740kJ/mol |
| Answer» B. 610kJ/mol | |
| 221. |
At room temperature, Butane (C₄H₁₀) is |
| A. | solid |
| B. | liquid |
| C. | gas |
| D. | vapor |
| Answer» D. vapor | |
| 222. |
Lone pair of electrons as compared to bond pair of electrons creates electron charge cloud which is |
| A. | less concentrated |
| B. | more concentrated |
| C. | transitional |
| D. | exchangeable |
| Answer» C. transitional | |
| 223. |
When the pair of electrons (e⁻) is equally shared due to same electronegativity between atoms, the covalent bond is |
| A. | polar |
| B. | non-polar |
| C. | neutral |
| D. | electrically attached |
| Answer» C. neutral | |
| 224. |
Lone pairs in CO₂ are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 225. |
covalent bond between two atoms is non-polar, when difference of electro negativity is |
| A. | one |
| B. | two |
| C. | three |
| D. | zero |
| Answer» E. | |
| 226. |
The bond length in C-C is |
| A. | 0.154 |
| B. | 0.134 |
| C. | 0.112 |
| D. | 0.116 |
| Answer» B. 0.134 | |
| 227. |
A molecule with the bond of shape trigonal pyramid is |
| A. | H₂O |
| B. | CO₂ |
| C. | CH₄ |
| D. | BF₃ |
| Answer» E. | |
| 228. |
Atoms bond, in order to |
| A. | attain a structure |
| B. | attain a compound |
| C. | attain a noble gas structure |
| D. | all of these |
| Answer» D. all of these | |
| 229. |
A covalent bond is the sharing of |
| A. | protons |
| B. | electrons |
| C. | neutrons |
| D. | none of above |
| Answer» C. neutrons | |
| 230. |
One of the four molecules that require the highest bond energy is |
| A. | Nitrogen |
| B. | Oxygen |
| C. | carbon monoxide |
| D. | Hydrogen |
| Answer» B. Oxygen | |
| 231. |
Due to positive metal ion and mobile valence electron, resulting bond is |
| A. | ionic in nature |
| B. | covalent in nature |
| C. | metallic in nature |
| D. | dative covalent bond |
| Answer» D. dative covalent bond | |
| 232. |
Solids are mostly denser than |
| A. | liquids |
| B. | gases |
| C. | noble gases |
| D. | alkalis |
| Answer» B. gases | |
| 233. |
The complete transfer of one or more electrons between atoms constitutes informing |
| A. | ionic bond |
| B. | covalent bond |
| C. | coordinate covalent bond |
| D. | dative bond |
| Answer» B. covalent bond | |
| 234. |
According to Collision theory, the particles must |
| A. | collide every where |
| B. | collide with correct orientation |
| C. | must be kept under immense pressures |
| D. | shall not be below their melting points |
| Answer» C. must be kept under immense pressures | |
| 235. |
Ethane C₂H₆,belongs to |
| A. | alkane |
| B. | alkene |
| C. | alkynes |
| D. | aromatic hydrocarbons |
| Answer» B. alkene | |
| 236. |
Chemical reactivity can be determined through |
| A. | polarity of a bond |
| B. | bond energy |
| C. | number of electrons used |
| D. | number of lone pairs |
| Answer» C. number of electrons used | |
| 237. |
If one end of a molecule attains more negative charge for a short moment a temporary set up is formed called |
| A. | dipole setup |
| B. | polar set up |
| C. | non-polar setup |
| D. | unipole setup |
| Answer» B. polar set up | |
| 238. |
In ethane (C₂H₆), the bond angle is |
| A. | 109.5° |
| B. | 104.5° |
| C. | 120° |
| D. | 87.5° |
| Answer» B. 104.5° | |
| 239. |
The strongest type of intermolecular force is called |
| A. | hydrogen bonding |
| B. | Van der Waals forces |
| C. | dipole reaction |
| D. | dipole-dipole forces |
| Answer» B. Van der Waals forces | |
| 240. |
Tetrachloromethane is a |
| A. | polar |
| B. | non-polar |
| C. | reactive |
| D. | unreactive |
| Answer» C. reactive | |
| 241. |
Formula of Calcium chloride ionic bond is |
| A. | CaCl₂ |
| B. | Ca₂Cl |
| C. | CaCl |
| D. | Ca₃Cl₂ |
| Answer» B. Ca₂Cl | |
| 242. |
Third ionization energy of Mg is |
| A. | 7732kJ |
| B. | 7731kJ |
| C. | 7730kJ |
| D. | 7733kJ |
| Answer» D. 7733kJ | |
| 243. |
Ammonia NH₃ is an example of |
| A. | ionic bonds |
| B. | covalent bonds |
| C. | metallic bonds |
| D. | dative bonds |
| Answer» C. metallic bonds | |
| 244. |
Sodium (Na) is not |
| A. | insoluble in water |
| B. | a salt |
| C. | explosive in air |
| D. | stable in air |
| Answer» E. | |
| 245. |
Amount of energy evolved in breaking of hydrogen bond as compared to formation of bond is |
| A. | less |
| B. | more |
| C. | same |
| D. | short |
| Answer» D. short | |
| 246. |
Organic solvents do not include |
| A. | alcohol |
| B. | water |
| C. | petrol |
| D. | tetra chloromethane |
| Answer» C. petrol | |
| 247. |
Molecular structure that is not giant ionic compound is |
| A. | Na₂O |
| B. | MgO |
| C. | SiO₂ |
| D. | Al₂O₃ |
| Answer» D. Al₂O₃ | |
| 248. |
Elements in group-IV are likely to form |
| A. | ionic bonds |
| B. | covalent bonds |
| C. | metallic bonds |
| D. | dative bond |
| Answer» C. metallic bonds | |
| 249. |
Increase in atomic number is associated with increase in |
| A. | nuclear charge |
| B. | proton charge |
| C. | neutron charge |
| D. | electron charge |
| Answer» B. proton charge | |
| 250. |
First ionization energy of sodium is |
| A. | 465 |
| B. | 457 |
| C. | 497 |
| D. | 496 |
| Answer» E. | |