MCQOPTIONS
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MCQOPTIONS
This section includes 374 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 301. |
The constants which are termed as van der Waal constants are |
| A. | a and b |
| B. | c and d |
| C. | d and e |
| D. | e and f |
| Answer» B. c and d | |
| 302. |
The critical temperature for oxygen is |
| A. | 123K |
| B. | 145K |
| C. | 154.4K |
| D. | 178K |
| Answer» D. 178K | |
| 303. |
According to kinetic theory PV is equal to |
| A. | 1/3mN*mean square velocity |
| B. | 1/5mN*mean square velocity |
| C. | 1/37mN*mean square velocity |
| D. | 1/9mN*mean square velocity |
| Answer» B. 1/5mN*mean square velocity | |
| 304. |
In Graham's law description 40.5 cm is the distance travelled by |
| A. | NH4Cl |
| B. | ammonia |
| C. | HCl |
| D. | oxygen |
| Answer» D. oxygen | |
| 305. |
The unit of Nm^+4mol^-2is a unit of constant |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| Answer» B. b | |
| 306. |
In determining kinetic equation of gases the velocity of all molecules are not equal so we use |
| A. | square of velocity |
| B. | mean square velocity |
| C. | under root of velocity |
| D. | cube of velocity |
| Answer» C. under root of velocity | |
| 307. |
The constant used in Boyle's law is |
| A. | pressure |
| B. | temperatue |
| C. | volume |
| D. | energy |
| Answer» C. volume | |
| 308. |
The critical volume for oxygen is |
| A. | 74.42cm cube |
| B. | 95.65 cm cube |
| C. | 64.54cm cube |
| D. | 89cm cube |
| Answer» B. 95.65 cm cube | |
| 309. |
Gas liquefies into liquid at |
| A. | low pressure |
| B. | low temperature |
| C. | low volume |
| D. | low density |
| Answer» C. low volume | |
| 310. |
The critical temperature is affected by |
| A. | size of gas |
| B. | shape of gas |
| C. | intermolecular of gas |
| D. | all of factors |
| Answer» E. | |
| 311. |
Critical temperature of a gas is a temperature above which gas does not remain |
| A. | solid |
| B. | liquid |
| C. | gases |
| D. | plasma |
| Answer» C. gases | |
| 312. |
The minimum temperature which has been attained is |
| A. | 10-5 |
| B. | 10-7 |
| C. | 10-8 |
| D. | 10-9 |
| Answer» B. 10-7 | |
| 313. |
Avogadro's law states equal volume of gases contains same number of |
| A. | crystals |
| B. | molecules |
| C. | states |
| D. | pressure units |
| Answer» C. states | |
| 314. |
The excluded volume is greater than actual volume of gases about |
| A. | five times |
| B. | four times |
| C. | six times |
| D. | seven times |
| Answer» C. six times | |
| 315. |
Shape of the gases is |
| A. | definite |
| B. | indefinite |
| C. | circle |
| D. | square |
| Answer» C. circle | |
| 316. |
The density is calculated by substituting value of n (number of moles )as |
| A. | m/M |
| B. | P/M |
| C. | D/M |
| D. | V/M |
| Answer» B. P/M | |
| 317. |
The expression of root mean square velocities is description of relationship between velocities of gas and |
| A. | absolute temperature |
| B. | absolute pressure |
| C. | absolute volume |
| D. | density |
| Answer» B. absolute pressure | |
| 318. |
One mole of gas at ideal conditions have volume of |
| A. | 22.414dm cube |
| B. | 24.14 dm3 |
| C. | 37.14dm cube |
| D. | 44.14 dm cube |
| Answer» B. 24.14 dm3 | |
| 319. |
The laws described for gases are independent of |
| A. | volume of gas |
| B. | nature of gas |
| C. | temperature of gas |
| D. | pressure of gas |
| Answer» C. temperature of gas | |
| 320. |
31.1 degree is the critical temperature for |
| A. | carbondioxide |
| B. | ammonia |
| C. | hydrogen |
| D. | sulphur |
| Answer» B. ammonia | |
| 321. |
Plasma responds to electric and magnetic fields because of |
| A. | charged particles |
| B. | atoms |
| C. | protons |
| D. | neutrons |
| Answer» B. atoms | |
| 322. |
Between temperature and volume of gas Charle's law determines |
| A. | qualitative relationship |
| B. | quantitative relationship |
| C. | none |
| D. | corelation |
| Answer» C. none | |
| 323. |
The process of diffusion of gases is |
| A. | spontaneous |
| B. | non spontaneous |
| C. | fast |
| D. | slow |
| Answer» B. non spontaneous | |
| 324. |
The experimental description of graham's law produces dense white fumes of |
| A. | ammonium chloride |
| B. | ammonium hydroxide |
| C. | hydrochloric acid |
| D. | ammonia gas |
| Answer» C. hydrochloric acid | |
| 325. |
The average translational kinetic energy of gas molecules is described by |
| A. | E(k) |
| B. | E(l) |
| C. | E(n) |
| D. | E(m) |
| Answer» B. E(l) | |
| 326. |
The collisions of gas molecules helps to change |
| A. | surface area |
| B. | direction |
| C. | area |
| D. | unit pressure |
| Answer» C. area | |
| 327. |
Mole fraction of each gas is always less than |
| A. | two |
| B. | three |
| C. | unity |
| D. | four |
| Answer» D. four | |
| 328. |
The thing collected at bottom of expansion chamber in linde's method is |
| A. | liquid air |
| B. | hydrogen |
| C. | nitrogen |
| D. | ice |
| Answer» B. hydrogen | |
| 329. |
If we use calorie unit to determine R its value becomes |
| A. | 1.987 |
| B. | 1.876 |
| C. | 1.657 |
| D. | 1.786 |
| Answer» B. 1.876 | |
| 330. |
The graph for Boyle's law is called |
| A. | isotherm |
| B. | hypertherm |
| C. | hypotherm |
| D. | none |
| Answer» B. hypertherm | |
| 331. |
101325Pa is equal to |
| A. | 790 torr |
| B. | 760torr |
| C. | 750 torr |
| D. | 780 torr |
| Answer» C. 750 torr | |
| 332. |
After collision molecules of gases are |
| A. | scattered |
| B. | combined |
| C. | compacted |
| D. | dissociate |
| Answer» B. combined | |
| 333. |
Density of a gas is directly proportional to |
| A. | molar mass |
| B. | pressure |
| C. | temperature |
| D. | rate of diffusion |
| Answer» B. pressure | |
| 334. |
Kinetic molecular theory describes behaviour of gases |
| A. | quantitatively |
| B. | qualitatively |
| C. | on basis of nature |
| D. | on base of sizes |
| Answer» B. qualitatively | |
| 335. |
In gases when molecules are compressed so closely the forces which starts operating are |
| A. | attractive |
| B. | repulsive |
| C. | polar |
| D. | bonding |
| Answer» C. polar | |
| 336. |
The molecules in pressure correction equation which attracts the other molecules inward are termed as |
| A. | Type A |
| B. | Type B |
| C. | Type C |
| D. | Type D |
| Answer» C. Type C | |
| 337. |
The smallest particles in the universe are |
| A. | solids |
| B. | quarks |
| C. | plasma |
| D. | neutrons |
| Answer» C. plasma | |
| 338. |
The boiling point of water on centigrade scale is |
| A. | 100 |
| B. | 200 |
| C. | 300 |
| D. | 120 |
| Answer» B. 200 | |
| 339. |
The true pressure can be represented as |
| A. | P+P' |
| B. | P-P' |
| C. | P-V |
| D. | V-t |
| Answer» B. P-P' | |
| 340. |
Effective volume is usually taken for |
| A. | 2 moles of gas |
| B. | 1 mole of gas |
| C. | 5 moles of gas |
| D. | 3moles of gas |
| Answer» C. 5 moles of gas | |
| 341. |
Sum of mole fraction of all gases is equal to |
| A. | two |
| B. | five |
| C. | six |
| D. | unity |
| Answer» E. | |
| 342. |
The gas which shows marked deviation from the ideal gas behaviour according to graph |
| A. | helium |
| B. | sulphur |
| C. | iodine |
| D. | carbon dioxide |
| Answer» E. | |
| 343. |
Sun is a ball of plasma which is about |
| A. | 1.6 km |
| B. | 1.5km |
| C. | 1.9km |
| D. | 2.0km |
| Answer» C. 1.9km | |
| 344. |
In case of R dm cube(decimeter)-atm(atmosphere) is the unit of |
| A. | heat |
| B. | pressure |
| C. | energy |
| D. | volume |
| Answer» D. volume | |
| 345. |
The partial pressure of oxygen reported in air is |
| A. | 159 torr |
| B. | 169 torr |
| C. | 170 torr |
| D. | 179 torr |
| Answer» B. 169 torr | |
| 346. |
Slope of a straight line is increased in graph of Charle's law by increasing |
| A. | mass of gas |
| B. | pressure of gas |
| C. | temperature of gas |
| D. | moles |
| Answer» B. pressure of gas | |
| 347. |
For deep sea diving oxygen is usually mixed with |
| A. | He gas |
| B. | Nitrogen gas |
| C. | hydrogen |
| D. | argon gas |
| Answer» B. Nitrogen gas | |
| 348. |
Low temperature plasma are usually kept |
| A. | vacuum |
| B. | cold place |
| C. | hot area |
| D. | atmosphere |
| Answer» B. cold place | |
| 349. |
According to standard units the value of R is |
| A. | 0.0765 |
| B. | 0.082 |
| C. | 0.074 |
| D. | 0.087 |
| Answer» C. 0.074 | |
| 350. |
Gases have low value of |
| A. | density |
| B. | volume |
| C. | gravity |
| D. | none |
| Answer» B. volume | |