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.
| 301. |
In a group of periodic table, nuclear charge |
| A. | increase |
| B. | decrease |
| C. | demolish |
| D. | fluctuate |
| Answer» B. decrease | |
| 302. |
Number of electrons in valence shell of first element of period is |
| A. | two |
| B. | one |
| C. | three |
| D. | four |
| Answer» C. three | |
| 303. |
Ionic radius of metals is formed by |
| A. | positive ion |
| B. | negative ion |
| C. | neutral ion |
| D. | normal atoms |
| Answer» B. negative ion | |
| 304. |
Electron affinity of sodium atom is |
| A. | −56 |
| B. | −54 |
| C. | −55 |
| D. | −53 |
| Answer» E. | |
| 305. |
Other than being used to line furnaces, a quality of ionic crystal structures is that they are |
| A. | conductors of heat |
| B. | conductors of electricity |
| C. | non-conductors of electricity |
| D. | non-conductors of heat |
| Answer» D. non-conductors of heat | |
| 306. |
Nitrogen molecule is the example of |
| A. | single covalent bond |
| B. | double covalent bond |
| C. | triple covalent bond |
| D. | single co-ordinate bond |
| Answer» D. single co-ordinate bond | |
| 307. |
When a covalent bond is formed between hydrogen and a very electronegative atom, then the bond is highly |
| A. | polarized |
| B. | electronegative |
| C. | stable |
| D. | unstable |
| Answer» B. electronegative | |
| 308. |
The strongest pull in a covalent bond is provided by Halogen (F₂, Cl₂, Br₂, I₂) |
| A. | F |
| B. | Cl |
| C. | Br |
| D. | I |
| Answer» B. Cl | |
| 309. |
Shape and bond angles is not dependent upon |
| A. | number of lone electron pairs |
| B. | number of binding pairs |
| C. | total number of electrons around an atom |
| D. | number of electrons in the valence shells |
| Answer» D. number of electrons in the valence shells | |
| 310. |
In O=C=O the bond angle is |
| A. | 180° |
| B. | 87.5° |
| C. | 120° |
| D. | 109.5° |
| Answer» B. 87.5° | |
| 311. |
Atomic radius of hydrogen in pm is |
| A. | 37 |
| B. | 32 |
| C. | 31 |
| D. | 43 |
| Answer» B. 32 | |
| 312. |
Energy of an element which is required to remove an electron from its gaseous atom, to form an ion is |
| A. | nuclear |
| B. | positional |
| C. | kinetic |
| D. | ionization |
| Answer» E. | |
| 313. |
Giant strong macromolecules are formed in |
| A. | ionic compounds |
| B. | simple covalent compounds |
| C. | complex covalent molecules |
| D. | metallic compounds |
| Answer» D. metallic compounds | |
| 314. |
Elements of I-A are good |
| A. | gainer of electrons |
| B. | losers of electrons |
| C. | both a and b |
| D. | fluctuator of electrons |
| Answer» C. both a and b | |
| 315. |
Elements of VII-A are good |
| A. | losers of electrons |
| B. | demolisher of electrons |
| C. | gainer of electrons |
| D. | retainer of electrons |
| Answer» D. retainer of electrons | |
| 316. |
Elements having high ionization energies are |
| A. | ion |
| B. | nonmetals |
| C. | metals |
| D. | atom |
| Answer» C. metals | |
| 317. |
Repulsion in electron pairs occurs until the |
| A. | repulsive forces are maximized |
| B. | repulsive forces are minimized |
| C. | repulsive forces are completely diminished |
| D. | attraction takes over repulsion |
| Answer» C. repulsive forces are completely diminished | |
| 318. |
A single π-bond can be drawn as a |
| A. | single cloud of electrons |
| B. | double cloud of electrons |
| C. | triple cloud of electrons |
| D. | ionic bond |
| Answer» B. double cloud of electrons | |
| 319. |
Water has a high |
| A. | surface tension |
| B. | viscosity |
| C. | density |
| D. | all of above |
| Answer» E. | |
| 320. |
Melting point of silica (SiO₂) is |
| A. | 1650 °C |
| B. | 1660 °C |
| C. | 1700 °C |
| D. | 1760 °C |
| Answer» B. 1660 °C | |
| 321. |
Bond energy can influence a compound's |
| A. | polarity |
| B. | reactivity |
| C. | electronegativity |
| D. | molarity |
| Answer» C. electronegativity | |
| 322. |
To form sigma bonds in C₂H₄ (Ethane), each carbon (C) atom uses |
| A. | 1 electron (e⁻) |
| B. | 2 electrons (e⁻) |
| C. | 3 electrons (e⁻) |
| D. | 4 electrons (e⁻) |
| Answer» D. 4 electrons (e⁻) | |
| 323. |
Bonding pairs of electrons in ammonia are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 324. |
Exothermic enthalpy changes are shown as |
| A. | negative values |
| B. | positive values |
| C. | neutral |
| D. | constant |
| Answer» B. positive values | |
| 325. |
Melting point of diamond is |
| A. | 340 °C |
| B. | 3400 °C |
| C. | 370 °C |
| D. | 3700 °C |
| Answer» E. | |
| 326. |
The identical bonds in molecules which possesses two type of bonds have bond energies totally |
| A. | different |
| B. | unique |
| C. | same |
| D. | constant |
| Answer» B. unique | |
| 327. |
The strength of an atom to attract electrons increases with the increase in |
| A. | polarity |
| B. | molarities |
| C. | electronegativity |
| D. | none of above |
| Answer» D. none of above | |
| 328. |
Ionic radii have same trend as of |
| A. | atomic size |
| B. | atomic number |
| C. | atomic radii |
| D. | atomic shape |
| Answer» D. atomic shape | |
| 329. |
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. | both a and b |
| Answer» B. ionization energy | |
| 330. |
Bonding can be |
| A. | metallic |
| B. | covalent |
| C. | ionic |
| D. | all of these |
| Answer» E. | |
| 331. |
Due to hydrogen bonds in water, water |
| A. | has high van der Waals' forces |
| B. | has high boiling and melting points |
| C. | has many valence electrons |
| D. | is a poor conductor of electricity |
| Answer» C. has many valence electrons | |
| 332. |
Graphite is a good conductor of electricity due to |
| A. | strong electrostatic bonding |
| B. | free localized bonds |
| C. | free delocalized electrons |
| D. | tetrahedral arrangement of particles |
| Answer» D. tetrahedral arrangement of particles | |
| 333. |
In solid state, ionic compounds |
| A. | have low melting points |
| B. | have low boiling points |
| C. | conduct electricity |
| D. | are non-conductors of electricity |
| Answer» E. | |
| 334. |
The molecular structure that is a giant ionic compound is |
| A. | Na₂O |
| B. | MgO |
| C. | Al₂O₃ |
| D. | all of above |
| Answer» E. | |
| 335. |
Ionic compounds are |
| A. | soluble in water |
| B. | good conductors of electricity if in molten state |
| C. | bad conductors of electricity |
| D. | both a and b |
| Answer» E. | |
| 336. |
When two Hydrogen atoms approach each other, forces of attraction and repulsion operate |
| A. | vertically |
| B. | horizontally |
| C. | simultaneously |
| D. | oppositely |
| Answer» D. oppositely | |
| 337. |
Insufficient gap between 1st and 2nd ionization energies show valence |
| A. | two |
| B. | three |
| C. | one |
| D. | four |
| Answer» D. four | |
| 338. |
In a hydrolysis reaction, silicon chloride (SiCl₄) reacts with water (H₂O) to form |
| A. | silicon dioxide |
| B. | hydrogen ions |
| C. | chloride ions |
| D. | all of above |
| Answer» E. | |
| 339. |
Fluorine has electron affinity less than that of |
| A. | sodium |
| B. | potassium |
| C. | chlorine |
| D. | oxygen |
| Answer» D. oxygen | |
| 340. |
atomic number of oxygen is |
| A. | 6 |
| B. | 7 |
| C. | 8 |
| D. | 19 |
| Answer» D. 19 | |
| 341. |
Electro negativity of oxygen atom is |
| A. | 3.2 |
| B. | 3.3 |
| C. | 3.4 |
| D. | 3.5 |
| Answer» E. | |
| 342. |
Stable noble gas which lies near to Li is |
| A. | helium |
| B. | Argon |
| C. | Xenon |
| D. | Neon |
| Answer» B. Argon | |
| 343. |
First ionization energy oxygen of is |
| A. | 1312 |
| B. | 1314 |
| C. | 1313 |
| D. | 1315 |
| Answer» C. 1313 | |
| 344. |
In potassium chloride chlorine atom tends to gain electron form |
| A. | sodium |
| B. | potassium |
| C. | chlorine itself |
| D. | chloride |
| Answer» C. chlorine itself | |
| 345. |
A covalently bond molecule's shape and bond angles rely a on number of |
| A. | electron pair |
| B. | lone pair |
| C. | proton pairs |
| D. | neutron pairs |
| Answer» D. neutron pairs | |
| 346. |
Electro negativity of fluorine atom is more then |
| A. | hydrogen |
| B. | oxygen |
| C. | nitrogen |
| D. | carbon |
| Answer» B. oxygen | |
| 347. |
A π-bond is |
| A. | symmetrical |
| B. | non-symmetrical |
| C. | cylindrical |
| D. | none of above |
| Answer» C. cylindrical | |
| 348. |
The number of single unpaired electron in non-metals are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 349. |
In ethane (C₂H₄), the π-bond is formed between |
| A. | C-C atoms |
| B. | C-H atoms |
| C. | H-H atoms |
| D. | no π-bond is formed. |
| Answer» D. no π-bond is formed. | |
| 350. |
Transference of electrons is involved in |
| A. | ionic bonds |
| B. | covalent bonds |
| C. | metallic bonds |
| D. | dative bonds |
| Answer» B. covalent bonds | |