MCQOPTIONS
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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.
| 351. |
Trend which is shown by ionization energy of group IIIA and VIA is |
| A. | normal |
| B. | neutral |
| C. | abnormal |
| D. | moderate |
| Answer» D. moderate | |
| 352. |
Poor conductors of electricity is a characteristic of |
| A. | ionic compounds |
| B. | covalent compounds |
| C. | metallic compounds |
| D. | dative bonds |
| Answer» C. metallic compounds | |
| 353. |
Covalent compounds readily become soluble in |
| A. | polar solvents |
| B. | non-polar solvents |
| C. | dipole solvents |
| D. | salt solutions |
| Answer» C. dipole solvents | |
| 354. |
The shape of water molecule is |
| A. | linear |
| B. | non-linear V shape |
| C. | trigonal |
| D. | tetrahedral |
| Answer» C. trigonal | |
| 355. |
A greater quantity of negative charge exists between two atomic nuclei in |
| A. | ionic bonds |
| B. | single covalent bonds |
| C. | double covalent bonds |
| D. | triple covalent bonds |
| Answer» E. | |
| 356. |
In C₂H₆, all the bonds are |
| A. | linear overlap |
| B. | ρ-bonds |
| C. | σ-bond |
| D. | π-bond |
| Answer» B. ρ-bonds | |
| 357. |
The bond angles in ammonia NH₃ are |
| A. | 107° |
| B. | 120° |
| C. | 109.5° |
| D. | 87.5° |
| Answer» B. 120° | |
| 358. |
The formation of the bond is usually |
| A. | exothermic |
| B. | endothermic |
| C. | ectothermic |
| D. | hypothermic |
| Answer» B. endothermic | |
| 359. |
From left to right in a period of periodic table proton number |
| A. | decrease |
| B. | neutral |
| C. | increase |
| D. | none |
| Answer» D. none | |
| 360. |
Positive ions in a sea of electrons are found in |
| A. | ionic compounds |
| B. | covalent bonds |
| C. | metallic bonds |
| D. | dative bond |
| Answer» D. dative bond | |
| 361. |
Electro negativity of potassium atom is |
| A. | 0.7 |
| B. | 0.6 |
| C. | 0.8 |
| D. | 0.9 |
| Answer» D. 0.9 | |
| 362. |
Metals are |
| A. | good conductors of heat |
| B. | good conductors of electricity |
| C. | not rigid |
| D. | all of the above |
| Answer» E. | |
| 363. |
Greater size of an ion is depend upon greater amount of |
| A. | negative charge |
| B. | positive charge |
| C. | neutral charge |
| D. | common charge |
| Answer» B. positive charge | |
| 364. |
atomic number of nitrogen is |
| A. | 7 |
| B. | 5 |
| C. | 4 |
| D. | 8 |
| Answer» B. 5 | |
| 365. |
Ionization energies is influenced by shielding effect of |
| A. | outer electrons |
| B. | inner electrons |
| C. | middle electrons |
| D. | protons |
| Answer» C. middle electrons | |
| 366. |
Ionization energy which is required to remove third electron after removal of second electron is |
| A. | first ionization energy |
| B. | third ionization energy |
| C. | second ionization energy |
| D. | fourth ionization energy |
| Answer» C. second ionization energy | |
| 367. |
Negative sign is given to electron affinity because energy is |
| A. | gain |
| B. | remain same |
| C. | released |
| D. | positive |
| Answer» D. positive | |
| 368. |
Important part of atom which is related to many physical and chemical properties is its |
| A. | size |
| B. | mass |
| C. | nucleus |
| D. | protons |
| Answer» B. mass | |
| 369. |
Electron affinity of hydrogen atom is |
| A. | −73 |
| B. | −72 |
| C. | −71 |
| D. | −74 |
| Answer» B. −72 | |
| 370. |
Energy needed to detach an electron form potassium atom is equal to its |
| A. | first ionization energy |
| B. | second ionization energy |
| C. | third ionization energy |
| D. | bond energy |
| Answer» B. second ionization energy | |
| 371. |
Force which hold atoms or ions together is |
| A. | simple bond |
| B. | physical bond |
| C. | chemical bond |
| D. | repulsion |
| Answer» D. repulsion | |
| 372. |
A sigma bond (σ-bond) is formed when |
| A. | p-orbital overlaps with another p-orbital |
| B. | s-orbital overlaps with another s-orbital |
| C. | p-orbital overlaps with a modified p-orbital |
| D. | f-orbital overlaps d-orbital |
| Answer» E. | |
| 373. |
Bonding pairs of electrons in SF₆ are |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 374. |
What is true about iodine? |
| A. | it is non-polar only |
| B. | it is insoluble only |
| C. | it is unreactive |
| D. | it is non-polar and insoluble |
| Answer» E. | |
| 375. |
Elements in group III are likely to form |
| A. | ionic bonds |
| B. | covalent bonds |
| C. | metallic bonds |
| D. | dative bonds |
| Answer» C. metallic bonds | |
| 376. |
Second ionization energy of Mg is |
| A. | 1450kJmol |
| B. | 1451kJmol |
| C. | 1453kJmol |
| D. | 1452kJmol |
| Answer» B. 1451kJmol | |
| 377. |
Very high boiling and melting points are of |
| A. | covalent compounds |
| B. | ionic compounds |
| C. | metallic compounds |
| D. | dative bonds |
| Answer» C. metallic compounds | |
| 378. |
In diamond, arrangement of carbon is |
| A. | hexagonal |
| B. | tetrahedral |
| C. | octagonal |
| D. | cube shaped |
| Answer» C. octagonal | |
| 379. |
Double covalent bond is formed in |
| A. | CO₂ |
| B. | O₂ |
| C. | C₂H₄ |
| D. | all of above |
| Answer» E. | |
| 380. |
Amount of energy which is evolved in bind formation is |
| A. | 436.44kJmol-1 |
| B. | 436.45kJmol-1 |
| C. | 436.43kJmol-1 |
| D. | 436.46kJmol-1 |
| Answer» C. 436.43kJmol-1 | |
| 381. |
Valence electrons of Mg lies in |
| A. | 3s |
| B. | 3p |
| C. | 3d |
| D. | 2s |
| Answer» B. 3p | |
| 382. |
The pair of outer shell electrons which doesn't take part in bonding is called |
| A. | spectators |
| B. | lone pairs |
| C. | spin pairs |
| D. | dative pairs |
| Answer» C. spin pairs | |
| 383. |
The amount of energy required to break a specific covalent bond is called |
| A. | bond dissociation energy |
| B. | bond energy |
| C. | bond enthalpy |
| D. | all of above |
| Answer» E. | |
| 384. |
Boron trifluoride (BF₃) is |
| A. | electron deficient only |
| B. | trigonal planar only |
| C. | octahedral structure |
| D. | electron deficient and trigonal planar |
| Answer» E. | |
| 385. |
Metals conduct electricity when they are |
| A. | solid |
| B. | molten |
| C. | aqueous |
| D. | gaseous |
| Answer» D. gaseous | |
| 386. |
Atomic number of carbon is |
| A. | 1 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» D. 7 | |
| 387. |
Those elements which have intermediate values of ionization energies are mostly |
| A. | metals |
| B. | nonmetals |
| C. | metalloids |
| D. | magnet |
| Answer» D. magnet | |
| 388. |
The dative covalent bond is found in |
| A. | ammonia |
| B. | ammonium ion |
| C. | urea |
| D. | nitrogen |
| Answer» C. urea | |
| 389. |
Index character of ionization energy is |
| A. | metallic |
| B. | electric |
| C. | positive |
| D. | negative |
| Answer» B. electric | |
| 390. |
Size of ionic radius of cation as compared to atomic radius of cation is |
| A. | larger |
| B. | smaller |
| C. | equal |
| D. | medium |
| Answer» C. equal | |
| 391. |
Unit of electro negativity is |
| A. | one |
| B. | two |
| C. | none |
| D. | three |
| Answer» D. three | |
| 392. |
Distance at which attractive forces of hydrogen overcome repulsive forces is |
| A. | 75.2pm |
| B. | 75.3pm |
| C. | 75.5pm |
| D. | 75.4pm |
| Answer» E. | |
| 393. |
In a group, atomic radii increase due to successive increase of |
| A. | electronic shells |
| B. | proton shells |
| C. | neutron shells |
| D. | nucleus |
| Answer» B. proton shells | |
| 394. |
First ionization energy of carbon is |
| A. | 1084 |
| B. | 1085 |
| C. | 1086 |
| D. | 1087 |
| Answer» D. 1087 | |
| 395. |
Ionization energies is influenced by nature of |
| A. | orbital |
| B. | nuclear |
| C. | atom |
| D. | electron |
| Answer» B. nuclear | |
| 396. |
Bond energy and the corresponding bond length vary directly with each other. comment whether the statement is true or false. |
| A. | True |
| B. | False |
| Answer» C. | |
| 397. |
An atom differs from its ion in which among the following ? |
| A. | Mass number |
| B. | Atomic number |
| C. | Neutrons |
| D. | Number of protons |
| Answer» E. | |
| 398. |
Atoms undergo bonding in order to ? |
| A. | Attain stability |
| B. | Lose stability |
| C. | Move freely |
| D. | increase energy |
| Answer» B. Lose stability | |
| 399. |
If a bond is made up of a large number of organic compound, then the bond is termed as? |
| A. | Ionic bond |
| B. | Metallic bond |
| C. | Covalent bond |
| D. | Dipolar bond |
| Answer» D. Dipolar bond | |
| 400. |
State whether the given statement is true or false “Ionic bonds are non-directional” |
| A. | True |
| B. | False |
| Answer» B. False | |