n passing over heated copper give? -Do You Know?

n passing over heated copper give? -Do You Know?
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What does mixture of CS2 and H2S on passing over heated copper give?

Description : What does mixture of CS2 and H2S on passing over heated copper give?

Last Answer : Methane

What does mixture of CS2 and H2S on passing over heated copper give?

Description : What does mixture of CS2 and H2S on passing over heated copper give?

Last Answer : Methane

The filament of an electric lamp becomes white hot but the lead-in wires holding the filament are only slightly heated because they (a) have smaller current passing through them (b) have very low resistance (c) have higher melting point (d) are made of black iron

Description : The filament of an electric lamp becomes white hot but the lead-in wires holding the filament are only slightly heated because they (a) have smaller current passing through them (b) have very low resistance (c) have higher melting point (d) are made of black iron

Last Answer : Ans:(b)

Copper sulphate crystals when heated strongly, lose their water of crystallization to give anhydrous copper sulphate accompanied by a change in color from: (a). Blue to green (b). Blue to white (c). Blue to sky blue (d). Blue to grey

Description : Copper sulphate crystals when heated strongly, lose their water of crystallization to give anhydrous copper sulphate accompanied by a change in color from: (a). Blue to green (b). Blue to white (c). Blue to sky blue (d). Blue to grey

Last Answer : (b). Blue to white

When water is heated from 0 degree C to 20 degree C, how does its volume change? -Do You Know?

Description : When water is heated from 0 degree C to 20 degree C, how does its volume change? -Do You Know?

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In vulcanisation, with which the natural rubber is heated? -Do You Know?

Description : In vulcanisation, with which the natural rubber is heated? -Do You Know?

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When ore is heated generally in absence of air then what is process called? -Do You Know?

Description : When ore is heated generally in absence of air then what is process called? -Do You Know?

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What is formed when white phosphorus is heated at 540 K in the absence of air? -Do You Know?

Description : What is formed when white phosphorus is heated at 540 K in the absence of air? -Do You Know?

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Write chemical equation reactions taking place when carried out with the help of (a) Iron reacts with steam (b) Magnesium reacts with dil HCl (c) Copper is heated in air. -Chemistry

Description : Write chemical equation reactions taking place when carried out with the help of (a) Iron reacts with steam (b) Magnesium reacts with dil HCl (c) Copper is heated in air. -Chemistry

Last Answer : This is the Answer.

How many grams of copper could be heated from 20 oC to 75 oC if 1200 calories are applied to it?

Description : How many grams of copper could be heated from 20 oC to 75 oC if 1200 calories are applied to it?

Last Answer : The mass of copper is 240 g.Use the following formula:q = m x c x DeltaT,where:q is energy, m is mass, c is specific heat capacity, and DeltaT is the change in temperature.DeltaT = Tfinal-TinititalKnownq = 1200 ... = q/(c x DeltaT)m = 1200/(0.0923 x 55) = 240 g (rounded to two significant figures)

How does the scale that forms copper is heated differ from the copper?

Description : How does the scale that forms copper is heated differ from the copper?

Last Answer : Heating copper in air the copper oxide CuO is formed.

Why does copper gain mas when heated?

Description : Why does copper gain mas when heated?

Last Answer : copper gains heat

How much heat is absorbed by 60.00 grams of copper when it is heated from 293 Kelvin to 353 Kelvin?

Description : How much heat is absorbed by 60.00 grams of copper when it is heated from 293 Kelvin to 353 Kelvin?

Last Answer : 1,386 J

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)

A copper disc has a hole. If the disc is heated, the size of the hole - (1) increases (2) decreases (3) No change (4) first increases and than decreases

Description : A copper disc has a hole. If the disc is heated, the size of the hole - (1) increases (2) decreases (3) No change (4) first increases and than decreases

Last Answer : (1) increases Explanation: When a metal plate with a circular hole at its centre is heated, definitely along with the areal expansion of the plate the diameter (sum of two radii) of the circular hole also increases.

Above image shows an experiment where copper sulphate crystals are heated. When we heat the crystals, they turn white. If you moisten the crystals again with water you will find that colour of crystals reappears . (1) How many water molecules are present in one formula unit of copper sulphate (a)5 (b)2 (c)6 (d)7

Description : Above image shows an experiment where copper sulphate crystals are heated. When we heat the crystals, they turn white. If you moisten the crystals again with water you will find that colour of crystals reappears . (1 ... are present in one formula unit of copper sulphate (a)5 (b)2 (c)6 (d)7

Last Answer : (a)5

What happens to the resistance of copper when it is heated?

Description : What happens to the resistance of copper when it is heated?

Last Answer : It increases.

A copper disc has a hole. If the disc is heated, the size of the hole (1) increases (2) decreases (3) No change (4) first increases and than decreases

Description : A copper disc has a hole. If the disc is heated, the size of the hole (1) increases (2) decreases (3) No change (4) first increases and than decreases

Last Answer : increases

A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100°C. If steel = 0.000012/C°, Esteel = 0.2 MN/mm2 , the tensile force developed at a temperature of 50°C, is (A) 80 N/mm2 (B) 100 N/mm2 (C) 120 N/mm2 (D) 150 N/mm2 Answer: Option

Description : A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the  ends were tightened when the rod was heated to 100°C. If steel = 0.000012/C°, Esteel = 0.2  MN/mm2 , the ... N/mm2 (B) 100 N/mm2 (C) 120 N/mm2 (D) 150 N/mm2 Answer: Option 

Last Answer : (C) 120 N/mm

What is the passing of traditions beliefs and behaviors from one generation to the next is known as a(n) .?

Description : What is the passing of traditions beliefs and behaviors from one generation to the next is known as a(n) .?

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The latitude passing through the northern most part of India is – (1) 35° N (2) 36° N (3) 37° N (4) 38° N

Description : The latitude passing through the northern most part of India is – (1) 35° N (2) 36° N (3) 37° N (4) 38° N

Last Answer : (3) 37° N Explanation: The northern most part of India is Siachen Glacier near Karakoram Pass. India claims the entire state of Jammu and Kashmir on the basis of Instrument of Accession ... Gilgit, Baltistan, and Kanjut, Gilgit, Baltistan, and Kanjut are presently under the control of Pakistan.

The latitude passing through the northern most part of India is (1) 35° N (2) 36° N (3) 37° N (4) 38° N

Description : The latitude passing through the northern most part of India is (1) 35° N (2) 36° N (3) 37° N (4) 38° N

Last Answer :  35° N

In which type of rocks are metals like gold and copper mostly found? -Do You Know?

Description : In which type of rocks are metals like gold and copper mostly found? -Do You Know?

Last Answer : answer:

During the Mughal rule, by which name was the copper coin known? -Do You Know?

Description : During the Mughal rule, by which name was the copper coin known? -Do You Know?

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A hollow sphere of copper is positively charged, Then what will the electric field be inside the sphere? -Do You Know?

Description : A hollow sphere of copper is positively charged, Then what will the electric field be inside the sphere? -Do You Know?

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Where was a copper chariot of Harappa times was discovered? -Do You Know?

Description : Where was a copper chariot of Harappa times was discovered? -Do You Know?

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Give reasons for the following observations: (a) The element carbon forms a very large number of compounds. (b) Air holes of a gas burner have to be adjusted when the heated vessels get blackened by the flame. (c) Use of synthetic detergents causes pollution of water. -Chemistry

Description : Give reasons for the following observations: (a) The element carbon forms a very large number of compounds. (b) Air holes of a gas burner have to be adjusted when the heated vessels get blackened by the flame. (c) Use of synthetic detergents causes pollution of water. -Chemistry

Last Answer : Answer. (a) Carbon forms large number of compounds since carbon is small in size and can form stable covalent bonds (catenation) and it shows tetravalency. (b) Air holes of gas burner are ... not get blackened. (c) Some synthetic detergents are non-biodegradable, therefore, cause pollution of water.

Iron sulphide is heated in air to form A, an oxide of sulphur. A is dissolved in water to give an acid. The basicity of this acid is..

Description : Iron sulphide is heated in air to form A, an oxide of sulphur. A is dissolved in water to give an acid. The basicity of this acid is..

Last Answer : Iron sulphide is heated in air to form A, an oxide of sulphur. A is dissolved in water to give an acid. The ... acid is.. A. 2 B. 3 C. 1 D. Zero

Which of the following statements comparing transistors and vacuum tubes is correct? A. Both transistors and vacuum tubes have a cathode that must be heated to give off electrons. B. A vacuum tube must have a heated cathode, where transistors do not. C. Neither transistors nor vacuum tubes require heat for electrons to flow. D. The anode of both transistors and vacuum tubes must be heated to give off electrons.

Description : Which of the following statements comparing transistors and vacuum tubes is correct? A. Both transistors and vacuum tubes have a cathode that must be heated to give off electrons. B. A vacuum tube must ... flow. D. The anode of both transistors and vacuum tubes must be heated to give off electrons.

Last Answer : Answer: B

Both white phosphorous as well as red phosphorous (A) Are soluble in CS2 (B) Burns when heated in air (C) Reacts with hot caustic soda solution to give Phosphine (D) All (A), (B), and (C)

Description : Both white phosphorous as well as red phosphorous (A) Are soluble in CS2 (B) Burns when heated in air (C) Reacts with hot caustic soda solution to give Phosphine (D) All (A), (B), and (C)

Last Answer : (B) Burns when heated in air

Which of the following carbohydrates will not give a red precipitate of Cu2O when heated with Benedict's solution? (a) Maltose (b) Glucose(c) Sucrose(d) Fructose

Description : Which of the following carbohydrates will not give a red precipitate of Cu2O when heated with Benedict's solution? (a) Maltose (b) Glucose (c) Sucrose (d) Fructose

Last Answer : Sucrose

1.12 litre dry chlorine gas at STP was passed over a heated metal when 5.56 g of chloride of the metal was formed. What is the equivalent weight of th

Description : 1.12 litre dry chlorine gas at STP was passed over a heated metal when 5.56 g of chloride of the metal was formed. What is the equivalent weight of th

Last Answer : 1.12 litre dry chlorine gas at STP was passed over a heated metal when 5.56 g of chloride of ... formed. What is the equivalent weight of the metal ?

As a salaried employee, is there a limit to how many overtime hours can be worked in a week without overtime compensation Some of us make over $455 a week, others don't. Thank you for your time. This will squash a discussion that has become quite heated.?

Description : As a salaried employee, is there a limit to how many overtime hours can be worked in a week without overtime compensation Some of us make over $455 a week, others don't. Thank you for your time. This will squash a discussion that has become quite heated.?

Last Answer : As a salaried employee who has researched sad to say there is no limit to the amount of overtime hours that can be worked in a week without overtime pay. This is a matter that is left entirely to ... and the employee. However, an employee has the right to refuse to work overtime if they choose to.

Heavy water is preferred over ordinary water as a coolant, because it. (A) Acts both as an efficient coolant as well as a moderator (B) Can be heated to a higher temperature without pressurizing (C) Is less prone to radiation damage (D) All (A), (B) and (C)

Description : Heavy water is preferred over ordinary water as a coolant, because it. (A) Acts both as an efficient coolant as well as a moderator (B) Can be heated to a higher temperature without pressurizing (C) Is less prone to radiation damage (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical? (A) 1 (B) < 1 (C) > 1 (D) None of these

Description : At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical? (A) 1 (B) < 1 (C) > 1 (D) None of these

Last Answer : (A) 1

Pick out the wrong statement. (A) In process heat exchangers, saturated steam is preferred over the superheated steam (B) The maximum is the emissive power of a surface at a temperature T1 occurs at a wavelength of λ1 . If the surface temperature is halved, the maximum in the emissive power would occur at a wavelength of 0.5 λ1 (C) When a vertical plate is heated in infinite air environmental under natural convection conditions, the velocity profile in air, normal to the plate, exhibits a maximum

Description : Pick out the wrong statement. (A) In process heat exchangers, saturated steam is preferred over the superheated steam (B) The maximum is the emissive power of a surface at a temperature T1 ... under natural convection conditions, the velocity profile in air, normal to the plate, exhibits a maximum

Last Answer : (B) The maximum is the emissive power of a surface at a temperature T1 occurs at a wavelength of λ1 . If the surface temperature is halved, the maximum in the emissive power would occur at a wavelength of 0.5 λ1

Give the equations of two lines passing through (4, –2). How many more such lines are there, and why? -Maths 9th

Description : Give the equations of two lines passing through (4, –2). How many more such lines are there, and why? -Maths 9th

Last Answer : Solution :-

Gas (B) on passing through cadmium acetate solution will give :

Description : Gas (B) on passing through cadmium acetate solution will give :

Last Answer : Gas (B) on passing through cadmium acetate solution will give : A. Black ppt B. Yellow ppt C. Orange ppt D. White ppt

Two bodies of mass 6 kg and 9 kg are connected with a light inextensile string passing over a smooth pulley with one of the bodies on a smooth inclined plane (θ = 30°) and the other hanging freely from the other end. Show that the time taken by 9 kg to pull 6 kg up the entire length is half the time taken by 6 kg to pull 9 kg over the same plane.

Description : Two bodies of mass 6 kg and 9 kg are connected with a light inextensile string passing over a smooth pulley with one of the bodies on a smooth inclined plane (θ = 30°) and the other hanging freely from the ... kg up the entire length is half the time taken by 6 kg to pull 9 kg over the same plane.

Last Answer : Given: Mass of body A (mA) = 6 kg Mass of body B (mB) = 9 kg Angle of inclination of the plane (θ) = 30° Let's assume that the acceleration of body A (aA) and body B (aB) are in opposite ... we know that the time taken (t) is given by the formula: t = √(2d/a), where d is the distance travelled

People who continue driving in the passing lane, even when other cars are passing YOU on the right, why don't you move over?

Description : People who continue driving in the passing lane, even when other cars are passing YOU on the right, why don't you move over?

Last Answer : All of them think that by going slightly over the speed limit gives them the right to “cruise” on the left lane. They should’ve failed the driving test for not understanding the concept of passing lane.

The string in fig. is passing over small smooth pulley rigidly attached to trolley A. If the speed of trolley is constant and qual to `v_(A)` towards

Description : The string in fig. is passing over small smooth pulley rigidly attached to trolley A. If the speed of trolley is constant and qual to `v_(A)` towards

Last Answer : The string in fig. is passing over small smooth pulley rigidly attached to trolley A. If the speed of trolley is constant ... =0` D. `V_(B)=4/5 V_(A)`

Nitrolim is obtained by passing nitrogen over:

Description : Nitrolim is obtained by passing nitrogen over:

Last Answer : Nitrolim is obtained by passing nitrogen over: A. heated mixture of `Al_(2)O_(3)` and carbon B. oleum C. calcium carbide D. heated calcium carbide

Nitrolim is obtained by passing nitrogen over:

Description : Nitrolim is obtained by passing nitrogen over:

Last Answer : Nitrolim is obtained by passing nitrogen over: A. heated mixture of `Al_(2)O_(3)` and carbon B. oleum C. calcium carbide D. heated calcium carbide

While passing over a suspension bridge, soldiers are not allowed to march in steps. This is (a) To prevent any formation of sharp echo (b) Because there cannot be orderly marching (c) To prevent any occurrence of resonance with the bridge (d) To prevent the bridge from executing forced vibrations

Description : While passing over a suspension bridge, soldiers are not allowed to march in steps. This is (a) To prevent any formation of sharp echo (b) Because there cannot be orderly marching (c) To prevent any occurrence of resonance with the bridge (d) To prevent the bridge from executing forced vibrations

Last Answer : Ans:(c)

Bleaching powder is prepared by passing – (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Description : Bleaching powder is prepared by passing – (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Last Answer : (1) Chlorine over slaked lime Explanation: Calcium hypochlorite (bleaching powder) is manufactured by the calcium process: 2Cl2 + 2Ca(OH)2 (slaked lime) Ca(OCl)2 + CaCl2 + 2H2O. Bleaching powder is actually a mixture of calcium hypochlorite and the basic chloride with some slaked lime.

The bending of radio waves passing over the top of a mountain range that disperses a weak portion of the signal behind the mountain is A. eddy-current phase effect B. knife-edge diffraction C. shadowing D. mirror refraction effect

Description : The bending of radio waves passing over the top of a mountain range that disperses a weak portion of the signal behind the mountain is A. eddy-current phase effect B. knife-edge diffraction C. shadowing D. mirror refraction effect

Last Answer : B. knife-edge diffraction

Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about (A) 1 to 2° (B) 2 to 5° (C) 5 to 10° (D) 10 to 15°

Description : Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about (A) 1 to 2° (B) 2 to 5° (C) 5 to 10° (D) 10 to 15°

Last Answer : (B) 2 to 5°

Producer gas is obtained by  A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast  B. carbonisation of bituminous coal  C. passing steam over incandescent coke  D. passing air and a large amount of steam over waste coal at about 650°C

Description : Producer gas is obtained by  A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast  B. carbonisation of bituminous coal  C. passing steam over incandescent coke  D. passing air and a large amount of steam over waste coal at about 650°C

Last Answer : Answer: A

Producer gas is obtained by  A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast  B. carbonisation of bituminous coal  C. passing steam over incandescent coke  D. passing air and a large amount of steam over waste coal at about 650°C

Description : Producer gas is obtained by  A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast  B. carbonisation of bituminous coal  C. passing steam over incandescent coke  D. passing air and a large amount of steam over waste coal at about 650°C

Last Answer : Answer: A