. Radiation energy is emitted by all the substances, which are above (A) 0°K (B) 0°C (C) 100°C (D) Room temperature

. Radiation energy is emitted by all the substances, which are above
(A) 0°K
(B) 0°C
(C) 100°C
(D) Room temperature
by

1 Answer

Answer :

(A) 0°K
by

Related questions

0°K, is equivalent to – (1) 273°C (2) -273°C (3) 0°C (4) 100°C

Description : 0°K, is equivalent to – (1) 273°C (2) -273°C (3) 0°C (4) 100°C

Last Answer : (2) -273°C Explanation: 0 degrees Kelvin is equal to - 273.15 degrees Celsius. It is the lowest possible temperature, at which all molecules are have the least possible amount of kinetic energy.

0°K is equivalent to (1) 273°C (2) -273°C (3) 0°C (4) 100°C

Description : 0°K is equivalent to (1) 273°C (2) -273°C (3) 0°C (4) 100°C

Last Answer : (2) -273°C Explanation: 0 degrees Kelvin is equal to - 273.15 degrees Celsius. It is the lowest possible temperature, at which all molecules are have the least possible amount of kinetic energy.

0°K is equivalent to (1) 273°C (2) – 273°C (3) 0°C (4) 100°C

Description : 0°K is equivalent to (1) 273°C (2) – 273°C (3) 0°C (4) 100°C

Last Answer :  – 273°C

'Cryogenics' is concerned with the generation & use of low temperature in the range of (A) 0°K to 123°K (B) 0°C to - 123°C (C) 0°C to - 273°C (D) 0°K to 273°K

Description : 'Cryogenics' is concerned with the generation & use of low temperature in the range of (A) 0°K to 123°K (B) 0°C to - 123°C (C) 0°C to - 273°C (D) 0°K to 273°K

Last Answer : Option A

Water has maximum density at (a) Room temperature (b) 0°C (c) 4°C (d) 100°C

Description : Water has maximum density at (a) Room temperature (b) 0°C (c) 4°C (d) 100°C

Last Answer : Ans:(c)

Carnot cycle efficiency is maximum when  (a) initial temperature is 0°K  (b) final temperature is 0°K  (c) difference between initial and final temperature is 0°K  (d) final temperature is 0°C  (e) initial temperature is minimum possible.

Description : Carnot cycle efficiency is maximum when  (a) initial temperature is 0°K  (b) final temperature is 0°K  (c) difference between initial and final temperature is 0°K  (d) final temperature is 0°C  (e) initial temperature is minimum possible.

Last Answer : Answer : b

The kinetic energy of gas molecule is zero at (A) 0°C (B) 273°C (C) 100°C (D) -273°C

Description : The kinetic energy of gas molecule is zero at (A) 0°C (B) 273°C (C) 100°C (D) -273°C

Last Answer : D) -273°C

Water will not be vaporized if – (1) the temperature is 0°C (2) the humidity is 0% (3) the humidity is 100% (4) the temperature is 100°C

Description : Water will not be vaporized if – (1) the temperature is 0°C (2) the humidity is 0% (3) the humidity is 100% (4) the temperature is 100°C

Last Answer : (3) the humidity is 100% Explanation: If the relative humidity is 100 percent, water will not evaporate as the air is already saturated with moisture. When relative humidity approaches 100 percent, condensation can occur. The lower the relative humidity, the easier it is for moisture to evaporate.

Water will not be vapourised if (1) the temperature is 0°C (2) the humidity is 0% (3) the humidity is 100% (4) the temperature is 100°C

Description : Water will not be vapourised if (1) the temperature is 0°C (2) the humidity is 0% (3) the humidity is 100% (4) the temperature is 100°C

Last Answer : the humidity is 100% 

One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to (A) Heat the water from 0°C to 100°C (B) Evaporate the water (C) To superheat the steam (D) Data insufficient, can't be predicted

Description : One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to (A) Heat the water from 0°C to 100°C (B) Evaporate the water (C) To superheat the steam (D) Data insufficient, can't be predicted

Last Answer : (B) Evaporate the water

Water has maximum density at – (1) -4°C (2) 0°C (3) 4°C (4) 100°C

Description : Water has maximum density at – (1) -4°C (2) 0°C (3) 4°C (4) 100°C

Last Answer : (3) 4°C Explanation: When cooled from room temperature liquid water becomes increasingly dense, as with other substances, but at approximately 4 °C (39 °F), pure water reaches its maximum density.

When heated from 0°C to 100°C volume of a given mass of water will – (1) Increase gradually (2) Decrease gradually (3) Increase and then will decrease (4) Decrease and then will Increase

Description : When heated from 0°C to 100°C volume of a given mass of water will – (1) Increase gradually (2) Decrease gradually (3) Increase and then will decrease (4) Decrease and then will Increase

Last Answer : (4) Decrease and then will Increase Explanation: When heated from 00 to 100 C volume of a given mass of water will first decrease and then increase. If the word "ice" or "solid" is not mentioned, the word "water" means liquid water.

Water has maximum density at – (1) 100°C (2) 0°C (3) 4°C (4) 273°C

Description : Water has maximum density at – (1) 100°C (2) 0°C (3) 4°C (4) 273°C

Last Answer : (3) 4°C Explanation: The maximum density of water occurs at 4 °C because at. this temperature, two opposing effects are in balance. Water is an exceptional compound that has a lower density in the ... due to the ion nature of water in the liquid phase, which packs the molecules tightly together.

The density of water is 1 g/cc. This is strictly valid at – (1) 0°C (2) 4°C (3) 25°C (4) 100°C

Description : The density of water is 1 g/cc. This is strictly valid at – (1) 0°C (2) 4°C (3) 25°C (4) 100°C

Last Answer : (2) 4°C Explanation: Water never has an absolute density because its density varies with temperature. Water has its maximum density of 1 g/cm3 at 4 degrees Celsius. When the temperature changes from either greater or ... 1 g/cm3. Water has the maximum density of 1 g/cm3 only when it is pure water.

Maximum density of water exists at (a) 0°C (b) 4°C (c) 40°C (d) 100°C

Description : Maximum density of water exists at (a) 0°C (b) 4°C (c) 40°C (d) 100°C

Last Answer : (b) 4°C

Water has maximum density at (1) 100°C (2) 0°C (3) 4°C (4) 273°C

Description : Water has maximum density at (1) 100°C (2) 0°C (3) 4°C (4) 273°C

Last Answer : 4°C

The density of water is 1 g/cc. This is strictly valid at (1) 0°C (2) 4°C (3) 25°C (4) 100°C

Description : The density of water is 1 g/cc. This is strictly valid at (1) 0°C (2) 4°C (3) 25°C (4) 100°C

Last Answer :  4°C

The thermal radiation emitted by a body is proportional to T n , where T is its absolute temperature. The value of 'n' is exactly 4 for (A) Black painted bodies only (B) All bodies (C) Polished bodies only (D) A black body

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Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an __________ body. (A) Grey (B) Black (C) Opaque

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In order to obtain spectrum from the emitted radiation, the atomic gas or vapour must be excited at a) much less than atmospheric pressure b) much high than atmospheric pressure c) atmospheric pressure d) high pressure and temperature

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