MCQOPTIONS
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MCQOPTIONS
This section includes 563 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge (GK) knowledge and support exam preparation. Choose a topic below to get started.
| 301. |
Kilowatt-hour (KWH) is the unit of - |
| A. | power |
| B. | resistance |
| C. | resistivity |
| D. | energy |
| Answer» E. | |
| 302. |
What is the relation between wavelength, frequency and velocity? |
| A. | velocity of wave = frequency * wavelength |
| B. | velocity of wave = frequency/wavelength |
| C. | velocity of wave = wavelength/frequency |
| D. | None of above |
| Answer» B. velocity of wave = frequency/wavelength | |
| 303. |
A rocket works on the principle of conservation of ______. |
| A. | mass |
| B. | linear momentum |
| C. | energy |
| D. | angular momentum |
| Answer» C. energy | |
| 304. |
Which fine metals has the maximum thermal conductivity? |
| A. | Iron |
| B. | Aluminium |
| C. | Silver |
| D. | Copper |
| Answer» D. Copper | |
| 305. |
'Hydraulic brakes' work on the principle of |
| A. | Pascal's law |
| B. | Thomson's law |
| C. | Newton's law |
| D. | Bernoulli's theorem |
| Answer» B. Thomson's law | |
| 306. |
In which of the following cases, kinetic energy is being used in performing work? |
| A. | Paddling the bicycle to cover a distance |
| B. | Driving a car to cover a distance |
| C. | Wind mill grinding wheat grain |
| D. | Rowing a boat in the lake |
| Answer» C. Wind mill grinding wheat grain | |
| 307. |
A hydrogen balloon floats because of |
| A. | Air pressure decreases with decrease in height |
| B. | Air pressure decreases with decrease in weight |
| C. | Weight of the balloon is less than the weight of air displaced by it |
| D. | The pressure inside the balloon is more than the pressure outside it |
| Answer» D. The pressure inside the balloon is more than the pressure outside it | |
| 308. |
The damage of the human body due to radiation (X-rays or y-rays etc,) is measured in |
| A. | Rems |
| B. | Roentgen |
| C. | Curie |
| D. | Rads |
| Answer» B. Roentgen | |
| 309. |
A moving car possesses - |
| A. | sound energy |
| B. | mechanical energy |
| C. | heat energy |
| D. | (d)chemical energy |
| Answer» C. heat energy | |
| 310. |
Fill in the blank with the most appropriate option. The Universal Constant of Gravitation is |
| A. | 6.67 x 10 Nm /kg |
| B. | 6.76 x 10 Nm /kg |
| C. | 6.67 x 10 Nm /kg |
| D. | 9.8 Nm /kg |
| Answer» D. 9.8 Nm /kg | |
| 311. |
According to the theory of relativity, which of the following al-ways remains constant? |
| A. | Length of an object |
| B. | Time |
| C. | Space |
| D. | Velocity of light |
| Answer» E. | |
| 312. |
In 1866, John Newlands, an English scientist, arranged the then known elements in the order of increasing atomic masses. He found that every eighth element had properties similar to that of the first. He called it the - |
| A. | Law of Pentamates |
| B. | Law of musical notes |
| C. | Law of Octaves |
| D. | None of the above |
| Answer» D. None of the above | |
| 313. |
Water is a good solvent of ionic salts because - |
| A. | It has no colour |
| B. | It has a boiling point |
| C. | It has a high dipole moment |
| D. | It has a high specific heat |
| Answer» D. It has a high specific heat | |
| 314. |
Which gas is used in filling electric bulbs - |
| A. | Neon |
| B. | Argon |
| C. | Krypton |
| D. | Radon |
| Answer» C. Krypton | |
| 315. |
Amount of water vapour in the atmosphere is measured in terms of |
| A. | Humidity |
| B. | Droplets |
| C. | Smog |
| D. | All of the above |
| Answer» B. Droplets | |
| 316. |
Which of the following metals is used for the manufacture of heating elements provided in electric iron? |
| A. | Nickel |
| B. | Chromium |
| C. | Nichrome |
| D. | Tungsten |
| Answer» D. Tungsten | |
| 317. |
Who defined the law of gravitation? |
| A. | Newton |
| B. | Archimedes |
| C. | Galileo |
| D. | Faraday |
| Answer» B. Archimedes | |
| 318. |
Winch of the following is not true about X-rays? |
| A. | have low penetrating power |
| B. | travel with the speed of light |
| C. | Can be reflected or refracted |
| D. | can affect photographic plates |
| Answer» B. travel with the speed of light | |
| 319. |
When net torque is zero, will be constant - |
| A. | force |
| B. | angular momentum |
| C. | linear momentum |
| D. | acceleration |
| Answer» C. linear momentum | |
| 320. |
The base of an electric iron is brightly polished mainly - |
| A. | to make it smooth and frictionless |
| B. | to make it rust-proof |
| C. | to reduce heat loss by radiation |
| D. | to make it more durable |
| Answer» D. to make it more durable | |
| 321. |
The absorption of ink by blotting paper involves - |
| A. | capillary action phenomenon |
| B. | viscosity of ink |
| C. | siphon action |
| D. | diffusion of ink through the blotting |
| Answer» B. viscosity of ink | |
| 322. |
What should a person on a freely rotating turn table do to decrease his (angular) speed? |
| A. | Bring his hands together |
| B. | Raise his hands up |
| C. | Spread his hands outwards |
| D. | Sit down with raised hands |
| Answer» D. Sit down with raised hands | |
| 323. |
Which one among the following is responsible for formation of "Ozone Holes" in the atmosphere? |
| A. | Benzopyrene |
| B. | Hydrocarbons |
| C. | Chlorofluorocarbons |
| D. | UV radiation |
| Answer» D. UV radiation | |
| 324. |
Which of the following properties is generally found, in non-metals?' |
| A. | Brittleness |
| B. | Conductivity |
| C. | Ductility |
| D. | Malleability |
| Answer» B. Conductivity | |
| 325. |
Due to rusting the weight of iron - |
| A. | Decreases |
| B. | Increases |
| C. | Remains the same |
| D. | Uncertain |
| Answer» C. Remains the same | |
| 326. |
Which of the following modes of expressing concentration is independent of temperature - |
| A. | Molarity |
| B. | Molality |
| C. | Normality |
| D. | Formality |
| Answer» C. Normality | |
| 327. |
In heating frozen foods in sealed pouches in microwaves, why do you first poke holes in the pouch? |
| A. | To prevent the steam pres-sure from bursting open the pouch |
| B. | To allow the heat to get into the food through the hole |
| C. | To allow the microwaves to get into the food through the holes |
| D. | To allow the aroma of the food to come out through the holes |
| Answer» B. To allow the heat to get into the food through the hole | |
| 328. |
The absolute zero is a temperature at which . |
| A. | molecular motion in a gas would cease |
| B. | water freezes |
| C. | all gases become liquid |
| D. | all gases become solid |
| Answer» B. water freezes | |
| 329. |
Human ear responds to intensities in range - |
| A. | 10-12Wm-2 to 1Wm-2 |
| B. | 15Wm-2 to 18Wm-2 |
| C. | 108Wm-2 to 2Wm-2 |
| D. | 10-3Wm-1 to 10-6Wm-1 |
| Answer» B. 15Wm-2 to 18Wm-2 | |
| 330. |
A charge of 2C passes from one point to the other in a circuit. If the potential difference between the two points is 5V, the amount of work done is : |
| A. | 10 J |
| B. | 0.4 J |
| C. | 2.5 J |
| D. | 5 J |
| Answer» B. 0.4 J | |
| 331. |
The instrument used to regulate temperature to a particular degree is called : |
| A. | Thermostat |
| B. | Thermometer |
| C. | Pyrometer |
| D. | Thermocouple |
| Answer» B. Thermometer | |
| 332. |
Efficiency of the catalyst depends on its |
| A. | physical state |
| B. | amount used |
| C. | molecular state |
| D. | number of free valencies |
| Answer» D. number of free valencies | |
| 333. |
Second s pendulum is a pendulum which executes one oscillation in: |
| A. | Half a second |
| B. | One second |
| C. | Two seconds |
| D. | None of these |
| Answer» D. None of these | |
| 334. |
The angular velocity depends upon the rate of change of the _______. |
| A. | Angular Distance |
| B. | Angular acceleration |
| C. | Angular Displacement |
| D. | torque |
| Answer» D. torque | |
| 335. |
Removal of carbon particles from air involves the principle of - |
| A. | Precipitation |
| B. | Filteration |
| C. | Electrophoresis |
| D. | Sedimentation |
| Answer» D. Sedimentation | |
| 336. |
Cloudy nights are wanner compared nights, because clouds mainly |
| A. | Absorb heat from the atmosphere send it towards earth |
| B. | Prevent cold waves from the sky descending on earth |
| C. | Reflect back the heat given by earth |
| D. | Produce heat and radiate it toward earth |
| Answer» D. Produce heat and radiate it toward earth | |
| 337. |
The time period of a second s pendulum is |
| A. | 1 second |
| B. | 2 seconds |
| C. | 0.5 second |
| D. | 1.5 seconds |
| Answer» C. 0.5 second | |
| 338. |
Which one of the following animals can hear ultrasonic sound? |
| A. | Rat |
| B. | Squirrel |
| C. | Cat |
| D. | Bat |
| Answer» E. | |
| 339. |
When we hear a sound, we can identify its source from . |
| A. | wave length of sound |
| B. | the overtones present in the sound |
| C. | the intensity of sound |
| D. | the amplitude of sound |
| Answer» C. the intensity of sound | |
| 340. |
Human beings can hear the sound range between: |
| A. | 10 to 20 decibels |
| B. | 100 to 150 decibels |
| C. | 50 to 60 decibels |
| D. | None of the above |
| Answer» E. | |
| 341. |
If a band is played on the moon the sound will - |
| A. | reverberate |
| B. | be heard by us faintly |
| C. | be heard upto 10km from it |
| D. | not be heard at any distance at all from it |
| Answer» E. | |
| 342. |
Newton is used to measure . |
| A. | Speed |
| B. | Volume |
| C. | Force |
| D. | Area |
| Answer» D. Area | |
| 343. |
The absolute zero is a temperature at which - |
| A. | Molecular motion in a gas would cease |
| B. | Water freezes |
| C. | All gases become liquid |
| D. | All gases become solid |
| Answer» B. Water freezes | |
| 344. |
Water has maximum density at ___. |
| A. | 0 C |
| B. | -15 C |
| C. | 4 C |
| D. | 15 C |
| Answer» D. 15 C | |
| 345. |
The method of protecting iron from rusting, by coating a thin layer of Zinc is called - |
| A. | Galvanizing |
| B. | rancidity |
| C. | Alloy |
| D. | Pulverizing |
| Answer» B. rancidity | |
| 346. |
A television channel is characterized by |
| A. | frequency of transmitted signal |
| B. | velocity of transmitted signal |
| C. | physical dimension of television screen |
| D. | size of picture tube |
| Answer» B. velocity of transmitted signal | |
| 347. |
The temperature at which the catalytic activity of the catalyst is maximum, is called |
| A. | room temperature |
| B. | critical temperature |
| C. | absolute temperature |
| D. | optimum temperature |
| Answer» E. | |
| 348. |
The velocity of light in vacuum is : |
| A. | 3 * 108 ms-1 |
| B. | 2 * 108 ms-1 |
| C. | 3 * 107 ms-1 |
| D. | 3 * 106 ms-1 |
| Answer» B. 2 * 108 ms-1 | |
| 349. |
During which of the following operating conditions of an auto-mobile, carbon monoxide content in exhaust gas is maximum? |
| A. | Acceleration |
| B. | Cruising |
| C. | Idle running |
| D. | Deacceleration |
| Answer» D. Deacceleration | |
| 350. |
It is difficult to walk on ice because of. |
| A. | absence of friction |
| B. | less inertia |
| C. | more inertia |
| D. | more mass |
| Answer» B. less inertia | |