MCQOPTIONS
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MCQOPTIONS
This section includes 6820 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 2401. |
What is the temperature at which a solid substance turns into a liquid after receiving heat? |
| A. | boiling point |
| B. | Melting point |
| C. | Evaporation |
| D. | none of these |
| Answer» C. Evaporation | |
| 2402. |
The boiling point of a liquid increases with increase in pressure. . . . . . . |
| A. | will decrease |
| B. | will grow |
| C. | will remain unchanged |
| D. | sometimes it will decrease sometimes it will increase |
| Answer» C. will remain unchanged | |
| 2403. |
What is not a characteristic of thermal radiation? |
| A. | No medium is required to proceed |
| B. | moves with the speed of light |
| C. | moves in a straight line |
| D. | affects the medium through which it passes |
| Answer» D. affects the medium through which it passes | |
| 2404. |
The cooling of water in an earthen pot depends on? |
| A. | at external temperature |
| B. | On atmospheric humidity |
| C. | on the air |
| D. | on all these |
| Answer» E. | |
| 2405. |
Boiling Point of water - |
| A. | is 100℃ |
| B. | depends on the material of the vessel |
| C. | depends on the relative humidity |
| D. | Depends on the pressure above the open surface of water |
| Answer» B. depends on the material of the vessel | |
| 2406. |
A metal solid ball has a coater inside. When this metal ball is heated, the volume of the coater will be - |
| A. | will grow |
| B. | will decrease |
| C. | do not very |
| D. | will double |
| Answer» B. will decrease | |
| 2407. |
heat stable. . . . . . . Is there a means of stabilization? |
| A. | electric current |
| B. | heat |
| C. | Pressure |
| D. | heat radiation |
| Answer» C. Pressure | |
| 2408. |
Boiling point of liquid due to impurities. . . . . . |
| A. | rises up |
| B. | happens to |
| C. | remains the same |
| D. | no relation |
| Answer» B. happens to | |
| 2409. |
A solid substance that changes directly into vapor state without changing into liquid is called? |
| A. | boiling |
| B. | distillation |
| C. | sublimation |
| D. | polymerization |
| Answer» D. polymerization | |
| 2410. |
By which of the following methods will heat transfer between liquids and gases? |
| A. | driving |
| B. | convection |
| C. | radiation |
| D. | all these |
| Answer» C. radiation | |
| 2411. |
Expansion by heating |
| A. | occurs only in solids |
| B. | increases the weight of the substance |
| C. | decreases the density of the substance |
| D. | occurs at the same rate in all liquids and solids |
| Answer» D. occurs at the same rate in all liquids and solids | |
| 2412. |
At what temperature is the density of water maximum? |
| A. | at 0℃ |
| B. | at 4℃ |
| C. | - at 4℃ |
| D. | at 100℃ |
| Answer» C. - at 4℃ | |
| 2413. |
In cold countries, alcohol is preferred over mercury as a thermometric liquid, because . . . . . . . |
| A. | Alcohol has a lower melting point |
| B. | Alcohol is a better conductor of heat |
| C. | alcohol is cheaper than mercury |
| D. | World production of alcohol exceeds that of mercury |
| Answer» B. Alcohol is a better conductor of heat | |
| 2414. |
On which principle is the absolute radiation thermometer based? |
| A. | on Seebeck's influence |
| B. | On Peltier's effect |
| C. | Stephen's influence |
| D. | on the effect of joules |
| Answer» D. on the effect of joules | |
| 2415. |
The human body temperature is 98.6 degrees F. What is this on the Celsius scale? |
| A. | 32℃ |
| B. | 35℃ |
| C. | 37℃ |
| D. | 40℃ |
| Answer» D. 40℃ | |
| 2416. |
What is the value of latent heat of melting of ice? |
| A. | 0.8 Cal / g |
| B. | 8 Cal / g |
| C. | 80 Cal / g |
| D. | 536 Cal / g |
| Answer» D. 536 Cal / g | |
| 2417. |
When an object is cooled, its molecules . . . . |
| A. | the energy increases |
| B. | the speed decreases |
| C. | the mass of the |
| D. | load increases |
| Answer» C. the mass of the | |
| 2418. |
If there is a sudden increase in the temperature of a place, then the relative humidity. . . . . . . . . |
| A. | increases |
| B. | happens |
| C. | remains stable |
| D. | decreasing - increasing |
| Answer» C. remains stable | |
| 2419. |
On what principle is the heat pair thermometer based? |
| A. | on Seebeck's influence |
| B. | on the effect of joules |
| C. | On Peltier's effect |
| D. | none of these |
| Answer» B. on the effect of joules | |
| 2420. |
Do water pipelines burst on the pahadon in extreme winter? |
| A. | pipe shrinks with cold |
| B. | Water in a pipe shrinks when it freezes |
| C. | Water in a pipe expands when it freezes |
| D. | The pipe cools and increases |
| Answer» D. The pipe cools and increases | |
| 2421. |
What is the temperature of an object? |
| A. | of the total energy of its molecules |
| B. | of the average energy of its molecules |
| C. | of the total velocity of its molecules |
| D. | of the average kinetic energy of its molecules |
| Answer» E. | |
| 2422. |
What is the normal temperature of human body in Kelvin value? |
| A. | 280 |
| B. | 290 |
| C. | 300 |
| D. | 310 |
| Answer» E. | |
| 2423. |
If you touch the iron block and the wooden block in the morning on cold days, then the iron block feels much colder, because. . . . |
| A. | The temperature of iron block is less than that of wooden block |
| B. | Iron is a better conductor of heat than wood |
| C. | Iron is a poor conductor of heat as compared to wood |
| D. | iron block is heavier than wood |
| Answer» C. Iron is a poor conductor of heat as compared to wood | |
| 2424. |
What energy does a solar cooker store and use for cooking? |
| A. | sound Energy |
| B. | wave energy |
| C. | solar energy |
| D. | All of the above |
| Answer» D. All of the above | |
| 2425. |
Water is used to cool the radiator of a motor vehicle because . . . . . . . . . |
| A. | the specific heat of water is high |
| B. | water has a lower density |
| C. | water is cheap |
| D. | water is available at low temperature |
| Answer» B. water has a lower density | |
| 2426. |
If the temperature of a man is 60℃, what will be his temperature in Farenhite? |
| A. | 140° F |
| B. | 120° F |
| C. | 130° F |
| D. | 98° F |
| Answer» B. 120° F | |
| 2427. |
When hot water is sprinkled over a thick glass glass, it breaks. What is the reason for this ? |
| A. | suddenly the glass expands |
| B. | Suddenly the glass gets compressed |
| C. | water evaporates |
| D. | Glass reacts chemically with water |
| Answer» B. Suddenly the glass gets compressed | |
| 2428. |
How high temperatures are measured? |
| A. | Platinum Resistance Thermometer |
| B. | by heat pair thermometer |
| C. | from full radiation cypherometer |
| D. | with nitrogen gas thermometer |
| Answer» C. from full radiation cypherometer | |
| 2429. |
The presence of moisture in the atmosphere is ascertained by seeing water droplets on the outer surface of a steel glass which is filled with? |
| A. | with hot milk |
| B. | with hot water |
| C. | with cold water |
| D. | with normal water |
| Answer» D. with normal water | |
| 2430. |
If water is cooled from 10°C to 0°C, then - |
| A. | The volume of water will decrease up to 4℃ then increase |
| B. | The density of water will increase continuously and will be maximum at 4℃ |
| C. | The volume of water will decrease continuously and become minimum at 4℃ |
| D. | Density of water will decrease up to 4℃ then increase |
| Answer» B. The density of water will increase continuously and will be maximum at 4℃ | |
| 2431. |
What is the absolute zero temperature on the Celsius scale of temperature? |
| A. | 0℃ |
| B. | 32℃ |
| C. | 100℃ |
| D. | - 273℃ |
| Answer» E. | |
| 2432. |
What is the thermal conductivity of insulating materials? |
| A. | Zero |
| B. | 10 |
| C. | 100 |
| D. | 2730K |
| Answer» B. 10 | |
| 2433. |
A gas thermometer is more sensitive than a liquid thermometer because a gas . . . . . . . . . |
| A. | lighter than liquid |
| B. | expands more than a liquid |
| C. | can be easily obtained |
| D. | does not change its position easily |
| Answer» C. can be easily obtained | |
| 2434. |
How is the temperature of the Sun measured? |
| A. | by platinum thermometer |
| B. | by gas thermometer |
| C. | by pyrometer |
| D. | by vapor pressure thermometer |
| Answer» D. by vapor pressure thermometer | |
| 2435. |
What is the lowest possible temperature? |
| A. | - 273℃ |
| B. | 0℃ |
| C. | - 300℃ |
| D. | 1℃ |
| Answer» B. 0℃ | |
| 2436. |
In summer, the camel feels relief from the heat even when the temperature is 46℃? |
| A. | sitting in the shade of desert plants |
| B. | raising your body temperature to 42℃ |
| C. | storing water in your body |
| D. | none of the above |
| Answer» C. storing water in your body | |
| 2437. |
At what temperature will the readings be the same in Celsius and Fahrenheit thermometers? |
| A. | - 40 degrees |
| B. | 212 degrees |
| C. | 40 degree |
| D. | 100 degree |
| Answer» B. 212 degrees | |
| 2438. |
The boiling point and freezing point of water on the Celsius scale are, respectively - |
| A. | 0℃ and 100℃ |
| B. | 100℃ and 0℃ |
| C. | 212℃ and 32℃ |
| D. | 32℃ and 212℃ |
| Answer» C. 212℃ and 32℃ | |
| 2439. |
During the day, the earth heats up much faster than the sea water, because . . . . . . . |
| A. | Earth's density is greater than that of water |
| B. | due to aquatic animals living in the sea |
| C. | The specific heat capacity of water is very high |
| D. | Water is made up of hydrogen and oxygen |
| Answer» D. Water is made up of hydrogen and oxygen | |
| 2440. |
In winter, when the water in the upper surface of the lake turns into ice, still aquatic animals survive because . . . . . . |
| A. | they can breathe snow |
| B. | A lot of oxygen is stored inside them |
| C. | Their body structure is such that they can live without oxygen. |
| D. | The density of water is highest at 4 °C, allowing water to remain below the upper surface of the ice. |
| Answer» E. | |
| 2441. |
At what temperature is the cryogenic test done? |
| A. | - 20℃ |
| B. | - 40℃ |
| C. | - 100℃ |
| D. | - 196℃ |
| Answer» E. | |
| 2442. |
What is the surface temperature of the Sun? |
| A. | 600K |
| B. | 2000K |
| C. | 6000K |
| D. | 7000K |
| Answer» D. 7000K | |
| 2443. |
Black-skinned people in Africa compared to white-skinned people in Britain. . . . . |
| A. | feel more hot |
| B. | feel less heat |
| C. | feel the same heat |
| D. | don't feel the heat |
| Answer» B. feel less heat | |
| 2444. |
When water falls from a height in a spring, its temperature is . . . . . |
| A. | happens to |
| B. | rises up |
| C. | neither decreases nor increases |
| D. | none of these |
| Answer» C. neither decreases nor increases | |
| 2445. |
The temperature of a liquid due to evaporation - |
| A. | will grow |
| B. | will decrease |
| C. | will grow rapidly |
| D. | will remain unchanged |
| Answer» C. will grow rapidly | |
| 2446. |
In isothermal change - |
| A. | heat unchanged |
| B. | temperature remains unchanged |
| C. | both heat and heat |
| D. | none of these |
| Answer» C. both heat and heat | |
| 2447. |
The rate of evaporation does not depend on? |
| A. | at the temperature of the liquid |
| B. | on the surface area of the liquid |
| C. | over the entire volume of the liquid |
| D. | at air pressure |
| Answer» D. at air pressure | |
| 2448. |
Humans feel troubled by humidity. Which of the following is the reason for this? |
| A. | sweating profusely |
| B. | sweating less |
| C. | not evaporation of sweat due to humidity |
| D. | none of the above |
| Answer» D. none of the above | |
| 2449. |
A piece of ice is floating in a glass full of water. The water level in the glass when the piece is completely melted. . . . . . . . . |
| A. | rises up |
| B. | happens to |
| C. | Unchanged |
| D. | none of these |
| Answer» D. none of these | |
| 2450. |
The morning sun is not as hot as the afternoon sun, because . . . . . |
| A. | The sun's rays move slowly in the morning |
| B. | the sun is cold in the morning |
| C. | Earth is farther from the sun in the morning |
| D. | In the morning the sun's rays have to travel a long distance in space. |
| Answer» E. | |