When water freezes its density (1) Decreases (2) Becomes Zero (3) Remains constant (4) Increases

When water freezes its density (1) Decreases (2) Becomes Zero (3) Remains constant (4) Increases
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When water freezes its density – (1) Decreases (2) Becomes Zero (3) Remains constant (4) Increases

Description : When water freezes its density – (1) Decreases (2) Becomes Zero (3) Remains constant (4) Increases

Last Answer : (1) Decreases Explanation: Water at ordinary temperatures contracts and in-creases in density as it is cooled, like most substances. But at about 4°C it reaches a maximum density and then decreases in density as it approaches the freezing point. This is referred to as anomalous property of water.

As the ball falls towards the ground, its velocity A. increases B. decreases C. remains constant D. becomes zero

Description : As the ball falls towards the ground, its velocity A. increases B. decreases C. remains constant D. becomes zero

Last Answer :  increases

By increasing the current, the drift velocity A. decreases B. increases C. remains constant D. becomes zero

Description : By increasing the current, the drift velocity A. decreases B. increases C. remains constant D. becomes zero

Last Answer : remains constant

When two gases are mixed, the entroру (a) Remains constant (b) Decreases (c) Increases (d) Becomes zero

Description : When two gases are mixed, the entroру (a) Remains constant (b) Decreases (c) Increases (d) Becomes zero

Last Answer : Ans:(c)

In an oil-lubricated journal bearing, coefficient of friction between the journal and the bearing. [IES-1995] (a) Remains constant at all speeds. (b) is minimum at zero speed and increases monotonically with increase in speed. (c) is maximum at zero speed and decreases monotonically with increase in speed. (d) becomes minimum at an optimum speed and then increases with further increase in speed.

Description : In an oil-lubricated journal bearing, coefficient of friction between the journal and the bearing. [IES-1995] (a) Remains constant at all speeds. (b) is minimum at zero speed and increases ... speed. (d) becomes minimum at an optimum speed and then increases with further increase in speed.

Last Answer : (d) becomes minimum at an optimum speed and then increases with further increase in speed.

When a detergent is added to pure water, its surface tension – (1) increases (2) decreases (3) remains constant (4) becomes infinite

Description : When a detergent is added to pure water, its surface tension – (1) increases (2) decreases (3) remains constant (4) becomes infinite

Last Answer : (2) decreases Explanation: When Soaps and detergents are added to water, they weaken the strength of the skin on the water's surface due to surface tension by interfering with hydrogen bonding ... of the soap or detergent is also attracted to the water, thereby decreasing the surface tension.

When a detergent is added to pure water, its surface tension (1) increases (2) decreases (3) remains constant (4) becomes infinite

Description : When a detergent is added to pure water, its surface tension (1) increases (2) decreases (3) remains constant (4) becomes infinite

Last Answer : decreases

With the increase of pressure, the boiling point of any substance - (1) Increases (2) Decreases (3) Remains Same (4) Becomes zero

Description : With the increase of pressure, the boiling point of any substance - (1) Increases (2) Decreases (3) Remains Same (4) Becomes zero

Last Answer : (1) Increases Explanation: The temperature stays the same until all the liquid has vaporized. As the temperature of a liquid rises, the pressure of escaping vapor also rises, and at the boiling point ... vapor is equal to that exerted on the liquid by the surrounding air, causing bubbles to form.

With the increase of pressure, the boiling point of any substance – (1) Increases (2) Decreases (3) Remains Same (4) Becomes zero

Description : With the increase of pressure, the boiling point of any substance – (1) Increases (2) Decreases (3) Remains Same (4) Becomes zero

Last Answer : (1) Increases Explanation: The temperature stays the same until all the liquid has vaporized. As the temperature of a liquid rises, the pressure of escaping vapor also rises, and at the boiling point ... vapor is equal to that exerted on the liquid by the surrounding air, causing bubbles to form.

.If we narrow the distance between two slits in Young’s experiment the fringes width __________. A. Increases B. Decreases C. Remains same D. becomes zero

Description : .If we narrow the distance between two slits in Young’s experiment the fringes width __________. A. Increases B. Decreases C. Remains same D. becomes zero

Last Answer : B. Decreases

As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Description : As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Last Answer : ANSWER: C

As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Description : As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Last Answer : ANSWER: C

As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Description : As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Last Answer : ANSWER: C

If the motor is overloaded, then the magnitude of ‘back emf’” a. Increases b. Decreases c. Constant d. Becomes zero

Description : If the motor is overloaded, then the magnitude of ‘back emf’” a. Increases b. Decreases c. Constant d. Becomes zero

Last Answer : Increases

An ideal gas is compressed in a cylinder so well insulated that there is essentially no heat transfer. The temperature of gas  a. Remains constant  b. increases  c. decreases  d. is basically zero

Description : An ideal gas is compressed in a cylinder so well insulated that there is essentially no heat transfer. The temperature of gas  a. Remains constant  b. increases  c. decreases  d. is basically zero

Last Answer : increases

The surface tension of water on adding detergent to it – (1) increases (2) decreases (3) no change (4) becomes zero

Description : The surface tension of water on adding detergent to it – (1) increases (2) decreases (3) no change (4) becomes zero

Last Answer : (2) decreases Explanation: In the solid and liquid phase, water molecules are bonded to each other by virtue of an interaction between hydrogen atoms on one molecule and the oxygen atom of another - the process ... to as "hydrogen bonding." The result is a kind of "skin" on liquid water's surface.

The surface tension of water on adding detergent to it (1) increases (2) decreases (3) no change (4) becomes zero

Description : The surface tension of water on adding detergent to it (1) increases (2) decreases (3) no change (4) becomes zero 

Last Answer : decreases

If cream is removed from milk, its density – (1) Increases (2) Decreases (3) Remains the same (4) May increase or decrease

Description : If cream is removed from milk, its density – (1) Increases (2) Decreases (3) Remains the same (4) May increase or decrease

Last Answer : (1) Increases Explanation: The density of pure fresh milk being on the average 1.032, while the density of fat globules is about 0.86. It follows that the removal of cream will increase the density, while the addition of water will decrease it.

If a metallic object is heated, its density generally: w) increases x) decreases y) fluctuates randomly z) remains the same

Description : If a metallic object is heated, its density generally: w) increases x) decreases y) fluctuates randomly z) remains the same

Last Answer : ANSWER: X -- DECREASES

If cream is removed from milk, its density (1) Increases (2) Decreases (3) Remains the same (4) May increase or decrease

Description : If cream is removed from milk, its density (1) Increases (2) Decreases (3) Remains the same (4) May increase or decrease

Last Answer : Increases

At boiling point of liquids, its – (1) Temperature increases (2) Atmospheric pressure increases (3) Temperature remains constant (4) Vapour pressure decreases

Description : At boiling point of liquids, its – (1) Temperature increases (2) Atmospheric pressure increases (3) Temperature remains constant (4) Vapour pressure decreases

Last Answer : (3) Temperature remains constant Explanation: An interesting property of matter is that its temperature remains constant during a phase change, assuming its surrounding pressure is constant. A liquid changes into gaseous state at a constant temperature called its boiling point.

After a projectile is fired horizontally near the earth's surface, the horizontal component of its velocity, neglecting any air resistance: w) increases steadily x) decreases steadily y) first decreases, then increases z) remains constant

Description : After a projectile is fired horizontally near the earth's surface, the horizontal component of its velocity, neglecting any air resistance: w) increases steadily x) decreases steadily y) first decreases, then increases z) remains constant

Last Answer : ANSWER: Z -- REMAINS CONSTANT 

At boiling point of liquids, its (1) Temperature increases (2) Atmospheric pressure increases (3) Temperature remains constant (4) Vapour pressure decreases

Description : At boiling point of liquids, its (1) Temperature increases (2) Atmospheric pressure increases (3) Temperature remains constant (4) Vapour pressure decreases 

Last Answer : Temperature remains constant

If the temperature of a piece increases suddenly, the relative humidity– (1) increases (2) decreases (3) remains constant (4) fluctuates

Description : If the temperature of a piece increases suddenly, the relative humidity– (1) increases (2) decreases (3) remains constant (4) fluctuates

Last Answer : (2) decreases Explanation: Relative humidity is the ratio of the partial pressure of water vapour in a airwater mixture to the saturated vapour pressure of water at a specific temperature.

If the temperature of a place increases suddenly, the relative humidity – (1) Increases (2) Decreases (3) Remains constant (4) Fluctuates

Description : If the temperature of a place increases suddenly, the relative humidity – (1) Increases (2) Decreases (3) Remains constant (4) Fluctuates

Last Answer : (2) Decreases Explanation: Relative humidity is the ratio of the partial pressure of water vapor in an airwater mixture to the saturated vapor pressure of water at a prescribed ... of the system decreases because the saturated vapor pressure of water increases with increasing temperature.

As depth increases, pressure in a fluid A. increases B. decreases C. remains constant D. varies

Description : As depth increases, pressure in a fluid A. increases B. decreases C. remains constant D. varies

Last Answer : increases

As distance increases, value of gravitational field strength A. also increases B. decreases C. remains constant D. may increase or decrease

Description : As distance increases, value of gravitational field strength A. also increases B. decreases C. remains constant D. may increase or decrease

Last Answer : decreases

By accelerating the magnet inside the coil, the current in it A. increases B. decreases C. remains constant D. reverses

Description : By accelerating the magnet inside the coil, the current in it A. increases B. decreases C. remains constant D. reverses

Last Answer : increases

Assuming all other parameters remain constant, what happens to the pressure of a gas when the volume of the gas is increased? w) increases x) decreases y) fluctuates sinusoidally z) remains the same

Description : Assuming all other parameters remain constant, what happens to the pressure of a gas when the volume of the gas is increased? w) increases x) decreases y) fluctuates sinusoidally z) remains the same

Last Answer : ANSWER: X -- DECREASES

If the temperature of a place increases suddenly, the relative humidity (1) Increases (2) Decreases (3) Remains constant (4) Fluctuates

Description : If the temperature of a place increases suddenly, the relative humidity (1) Increases (2) Decreases (3) Remains constant (4) Fluctuates

Last Answer : Decreases

In obstructive jaundice prothrombin time (A) Remains normal (B) Decreases (C) Responds to vit K and becomes normal (D) Responds to vit K and increases

Description : In obstructive jaundice prothrombin time (A) Remains normal (B) Decreases (C) Responds to vit K and becomes normal (D) Responds to vit K and increases

Last Answer : Answer : C

In a ferromagnetic material the state of flux density is as follows when external magnetic field is applied to it. (A) Increased (B) Decreased (C) Remains unchanged (D) Becomes zero

Description : In a ferromagnetic material the state of flux density is as follows when external magnetic field is applied to it. (A) Increased (B) Decreased (C) Remains unchanged (D) Becomes zero

Last Answer : (C) Remains unchanged

What happens to the internal energy of water at reference temperature where enthalpy is zero?  a. Becomes negative  b. Becomes positive  c. Remains constant  d. Cannot be defined

Description : What happens to the internal energy of water at reference temperature where enthalpy is zero?  a. Becomes negative  b. Becomes positive  c. Remains constant  d. Cannot be defined

Last Answer : Becomes negative

When a man circles round the earth in a satellite, then (a) His mass becomes zero but weight remains constant (b) Mass remains constant but weight becomes zero (c) Both mass and weight remain constant (d) Both mass and weight remain zero

Description : When a man circles round the earth in a satellite, then (a) His mass becomes zero but weight remains constant (b) Mass remains constant but weight becomes zero (c) Both mass and weight remain constant (d) Both mass and weight remain zero

Last Answer : Ans:(b)

A copper plate has a circular hole cut in it. If the plate is heated to a higher temperature, the diameter of the hole (a) Becomes smaller (b) Increases (c) Remains constant (d) Increases but the total area of the plate remains constant

Description : A copper plate has a circular hole cut in it. If the plate is heated to a higher temperature, the diameter of the hole (a) Becomes smaller (b) Increases (c) Remains constant (d) Increases but the total area of the plate remains constant

Last Answer : Ans:(b)

Thermal conductivity of a gas at low density, __________ with increase in temperature. (A) Decreases (B) Increases (C) Remains unchanged (D) May increase or decrease; depends on the gas

Description : Thermal conductivity of a gas at low density, __________ with increase in temperature. (A) Decreases (B) Increases (C) Remains unchanged (D) May increase or decrease; depends on the gas

Last Answer : (B) Increases

When earth fault occurs: a) voltage potential at the earth mat increases due to grounding b) voltage potential at the earth mat decreases due to grounding c) voltage potential at the earth mat remains zero irrespective of fault d) none of the above

Description : When earth fault occurs: a) voltage potential at the earth mat increases due to grounding b) voltage potential at the earth mat decreases due to grounding c) voltage potential at the earth mat remains zero irrespective of fault d) none of the above

Last Answer : Ans: A

With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature). (A) Increases (B) Remains unchanged (C) Decreases (D) Decreases linearly

Description : With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature). (A) Increases (B) Remains unchanged (C) Decreases (D) Decreases linearly

Last Answer : (A) Increases

On a day when the partial pressure of water vapor remains constant, what happens as the temperature rises?  a. the relative humidity increases  b. the relative humidity decreases  c. the relative humidity remains constant  d. the air would eventually become saturated

Description : On a day when the partial pressure of water vapor remains constant, what happens as the temperature rises?  a. the relative humidity increases  b. the relative humidity decreases  c. the relative humidity remains constant  d. the air would eventually become saturated

Last Answer : the relative humidity decreases

The volume of a given amount of water _________ as the temperature decreases from 4˚C to 0˚C.  a. decreases  b. increases  c. remains constant  d. none of the above

Description : The volume of a given amount of water _________ as the temperature decreases from 4˚C to 0˚C.  a. decreases  b. increases  c. remains constant  d. none of the above

Last Answer : increases

When a bar magnet is cut into two equal halves, the pole strength of each piece (1) becomes double (2) becomes half (3) becomes zero (4) remains the same

Description : When a bar magnet is cut into two equal halves, the pole strength of each piece (1) becomes double (2) becomes half (3) becomes zero (4) remains the same

Last Answer : (4) remains the same Explanation: The poles remains same whether the magnet is cut into two equal half or more and also pole strength remains same but magnetic moment reduces due to decrease in the length of ... is called north pole (N-poled of the magnet and the other end the south pole (S-pole).

When a bar magnet is cut into two equal halves, the pole strength of each piece – (1) becomes double (2) becomes half (3) becomes zero (4) remains the same

Description : When a bar magnet is cut into two equal halves, the pole strength of each piece – (1) becomes double (2) becomes half (3) becomes zero (4) remains the same

Last Answer : remains the same

The absolute zero is a temperature at which ______. (1) molecular motion in a gas would cease (2) water freezes (3) all gases become liquid (4) all gases become solid

Description : The absolute zero is a temperature at which ______. (1) molecular motion in a gas would cease (2) water freezes (3) all gases become liquid (4) all gases become solid

Last Answer : (1) molecular motion in a gas would cease Explanation: Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance.

The absolute zero is a temperature at which ______. (1) molecular motion in a gas would cease (2) water freezes (3) all gases become liquid (4) all gases become solid

Description : The absolute zero is a temperature at which ______. (1) molecular motion in a gas would cease (2) water freezes (3) all gases become liquid (4) all gases become solid

Last Answer : (1) molecular motion in a gas would cease Explanation: Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance. It is the point at which all motion in matter stops.

The absolute zero is a temperature at which - (1) Molecular motion in a gas would cease (2) Water freezes (3) All gases become liquid (4) All gases become solid

Description : The absolute zero is a temperature at which - (1) Molecular motion in a gas would cease (2) Water freezes (3) All gases become liquid (4) All gases become solid

Last Answer : (1) Molecular motion in a gas would cease Explanation: Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance. That temperature Molecular motion in a gas would cease.

The absolute zero is a temperature at which _______ (1) molecular motion in a gas would cease (2) water freezes (3) all gases become liquid (4) all gases become solid

Description : The absolute zero is a temperature at which _______ (1) molecular motion in a gas would cease (2) water freezes (3) all gases become liquid (4) all gases become solid

Last Answer : molecular motion in a gas would cease

During sensible cooling of air, its wet bulb temperature (A) Decreases but dew point remains constant (B) Increases but dew point remains constant (C) Increases & the dew point decreases (D) Decreases & the dew point increases

Description : During sensible cooling of air, its wet bulb temperature (A) Decreases but dew point remains constant (B) Increases but dew point remains constant (C) Increases & the dew point decreases (D) Decreases & the dew point increases

Last Answer : (B) Increases but dew point remains constant

With increase in temperature, the thermal conductivity of most liquids (A) Increases (B) Decreases (C) Remain same (D) First increases upto a certain temperature and then becomes constant

Description : With increase in temperature, the thermal conductivity of most liquids (A) Increases (B) Decreases (C) Remain same (D) First increases upto a certain temperature and then becomes constant

Last Answer : (C) Remain same

When a catalyst increases the rate of forward reaction, the value of rate constant (A) Increases (B) Decreases (C) Remain same (D) Becomes infinite

Description : When a catalyst increases the rate of forward reaction, the value of rate constant (A) Increases (B) Decreases (C) Remain same (D) Becomes infinite

Last Answer : (A) Increases

The degree of the B-spline with varying knot vectors a.Increases with knot vectors b.Decreases with knot vectors c.Remains constant d.none of the above

Description : The degree of the B-spline with varying knot vectors a.Increases with knot vectors b.Decreases with knot vectors c.Remains constant d.none of the above

Last Answer : a.Increases with knot vectors