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

What is formed when white phosphorus is heated at 540 K in the absence of
air?
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1 Answer

Answer :

Red phosphorus
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Related questions

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Upon heating`KClO_(3)` in presence of catalytic amount of `MnO_(2)`, a gas `W` is formed. Excess amount of `W` reacts with white phosphorus to given `

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Upon heating`KClO_(3)` in presence of catalytic amount of `MnO_(2)`, a gas `W` is formed. Excess amount of `W` reacts with white phosphorus to given `

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n a chemical factory where dyes are made, wet cake at 30 OC consisting of 60% moisture is put in a dryer to obtain an output having only 5% moisture, at atmospheric pressure. In each batch about 120 kgs of material is dried. a. The quantity of moisture removed per batch. b. What is the total quantity ( sensible & latent) of heat required to evaporate the moisture, if the latent heat of water is 540 kcal/kg at atmospheric conditions, Ignore heat absorbed by the solids c. Find the quantity of steam required for the drying process (per batch), if steam at 4 kg/cm2 is used for generating hot air in the dryer and the dryer efficiency is 80%. Latent heat of steam at 4 kg/cm2 is 520 kcal/kg.

Description : n a chemical factory where dyes are made, wet cake at 30 OC consisting of 60% moisture  is put in a dryer to obtain an output having only 5% moisture, at atmospheric pressure. In  each batch about 120 ... dryer and the dryer efficiency  is 80%. Latent heat of steam at 4 kg/cm2 is 520 kcal/kg.

Last Answer : Given that   Qty of material dried per batch - 120 Kgs  Moisture at inlet - 60% a. The quantity of moisture removed per batch.  Water quantity in a wet batch - 120 x 0.6 = 72 Kgs.  Quantity of bone dry ... - 48/0.95 = 50.5 Kgs.  Equivalent water in a dry batch - 50.5 - 48 = 2.5 Kgs.

Why is that on being heated in excess supply of air K,Rb and Cs forms superoxide’s instead of Oxides & peroxides?

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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)

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Sides of a triangle are in the ratio of 12 : 17 : 25 and its perimeter is 540 cm. Find its area. -Maths 9th

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Last Answer : It is the same as 5/6 times 540 = 450

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Description : How many twos are there in 540?

Last Answer : 540 ÷ 2 = 270

What is 540 x 4?

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Last Answer : 540 x 2 = 1,0801,080 x 2 = 2,160

What is 540 divided by 75?

Description : What is 540 divided by 75?

Last Answer : 7.2

Is 90 minutes greater than 540 seconds how many minutes are in is 90 minutes greater than 540 seconds?

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Last Answer : There are 5400 seconds in 90 minutes which is greater than 540seconds

How many number of moles of atom are present in 540 grams of glucose?

Description : How many number of moles of atom are present in 540 grams of glucose?

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What is 540 divided by 60 equals?

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540,632 word form?

Description : 540,632 word form?

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The maximum strength of the elected members of the House of the People (Lok Sabha) is – (1) 530 (2) 545 (3) 540 (4) 550

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Last Answer : (2) 545 Explanation: The Constitution limits the Lok Sabha to a maximum of 552 members, including no more than 20 members representing people from the Union Territories, and two appointed non- ... community is not adequately represented). At present, the strength of the house is 545 members.

What is the rotor speed of a four pole, 60 cycle, induction motor operating at full load with 3% slip? A. 270 RPM B. 540 RPM C. 873 RPM D. 1746 RPM

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What is the local oscillator frequency range commercial AM broadcast if it is equal to 455 KHz. A. 540 to 1600 KHz B. 0 to 1600 KHz C. 995 to 2055 KHz D. 0 to 455 KHz

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. A normal system with 400 unadjusted function points would have _____ adjusted function points when the shortcut method is use to determine a. 200 b. 260 c. 400 d. 540 e. 600the complexity of the project.

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Last Answer : c. 400

Convert the point (3,4,5) from Cartesian to spherical coordinates a) (7.07,450,530) b) (0.707,450,530) c) (7.07,540,630) d) (0.707,540,630)

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A dumpy level is set up with its eye-piece vertically over a peg . The height from the top of peg to the centre of the eye-piece is 1.540 m and the reading on peg is 0.705 m. The level is then setup over . The height of the eye-piece above peg is 1.490 m and a reading on is 2.195 m. The difference in level between and is (A) 2.900 m (B) 3.030 m (C) 0.770 m (D) 0.785 m

Description : A dumpy level is set up with its eye-piece vertically over a peg . The height from the top of peg to the centre of the eye-piece is 1.540 m and the reading on peg is 0.705 m. The level is then setup over . The height ... in level between and is (A) 2.900 m (B) 3.030 m (C) 0.770 m (D) 0.785 m

Last Answer : (C) 0.770 m

Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to __________ °C. (A) 270 (B) 327 (C) 300 (D) 540

Description : Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to __________ °C. (A) 270 (B) 327 (C) 300 (D) 540

Last Answer : (B) 327

The production of tractor is commenced during 1961-62 ,turning out them A) 880. C) 540 B) 860. D)

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The waste gases coming out from gas turbine exhausts are of the order of: a) 370-540 b) 450 – 700 c) 700- 800 d) 250-440

Description : The waste gases coming out from gas turbine exhausts are of the order of: a) 370-540 b) 450 – 700 c) 700- 800 d) 250-440

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The value for the ΔU of a system is -120 J. If the system is known to have absorbed 420 J of heat, how much work was done?  a. -540 J  b. -640 J  c. -740 J  d. -840 J formula: ΔU = q +w

Description : The value for the ΔU of a system is -120 J. If the system is known to have absorbed 420 J of heat, how much work was done?  a. -540 J  b. -640 J  c. -740 J  d. -840 J formula: ΔU = q +w

Last Answer : -540 J

729 656 595 ? 494 a) 540 b) 530 c) 500 d) 529 e) 541

Description : 729 656 595 ? 494 a) 540 b) 530 c) 500 d) 529 e) 541

Last Answer : Difference of Difference 9. Answer: a)

In how many ways letter of the world BANKING can be arranged so that vowels always come together? 1)240 2)120 3)720 4)540

Description : In how many ways letter of the world BANKING can be arranged so that vowels always come together? 1)240 2)120 3)720 4)540

Last Answer : 3)720 Exp: [(6!)/(2!)]×(2!)=360×2=720 [(6!)/(2!)]-letters formed, 2!- Vowels.

Range of wavelengths of ultraviolet ∙ A. 670 nm to 10^3 nm ∙ B. 440 nm to 540 nm ∙ C. 110 nm to 240 nm ∙ D. 10 nm to 390 nm

Description : Range of wavelengths of ultraviolet ∙ A. 670 nm to 10^3 nm ∙ B. 440 nm to 540 nm ∙ C. 110 nm to 240 nm ∙ D. 10 nm to 390 nm

Last Answer : D. 10 nm to 390 nm

ange of wavelength of visible light ∙ A. 670 nm to 10^3 nm ∙ B. 440 nm to 540 nm ∙ C. 110 nm to 240 nm ∙ D. 390 nm to 770 nm

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Last Answer : D. 390 nm to 770 nm

worker is allowed 60 hours to complete the job on a guaranteed wage of Rs. 10 per hour. Under the Rowan Plan, he gets an hourly wage of Rs. 12 per hour. For the same saving in time, how much he will get under the Halsey Plan? (a) Rs. 720 (b) Rs. 540 (c) Rs. 600 (d) Rs. 900

Description : worker is allowed 60 hours to complete the job on a guaranteed wage of Rs. 10 per hour. Under  the Rowan Plan, he gets an hourly wage of Rs. 12 per hour. For the same saving in time, how much he  will get under the Halsey Plan? (a) Rs. 720 (b) Rs. 540 (c) Rs. 600  (d) Rs. 900

Last Answer : (b) Rs. 540

Formula for adding weight (ballast) on tractor tyres working in loose wet soil for good traction a)(km/hr × kg/PTO kw)=540 b)( km/hr × kg/PTO kw)=670 c)( km/hr × kg/PTO HP)=540 d)( km/hr × kg/PTO HP)=670

Description : Formula for adding weight (ballast) on tractor tyres working in loose wet soil for good traction a)(km/hr × kg/PTO kw)=540 b)( km/hr × kg/PTO kw)=670 c)( km/hr × kg/PTO HP)=540 d)( km/hr × kg/PTO HP)=670

Last Answer : a)(km/hr × kg/PTO kw)=540

What is the value given to standard pressure in Torrs? w) 540 x) 660 y) 760 z) 780

Description : What is the value given to standard pressure in Torrs? w) 540 x) 660 y) 760 z) 780

Last Answer : ANSWER: Y -- 760

The population of India is about 1.2 billion. Take the average consumption of energy per person per year in India as 30 Mega Joules. If this consumption is met by carbon based fuels and the rate of carbon emissions per kilojoule is l5 x I0 6 kgs, the total carbon emissions per year from India will be (A) 54 million metric tons (B) 540 million metric tons (C) 5400 million metric tons (D) 2400 million metric tons

Description : The population of India is about 1.2 billion. Take the average consumption of energy per person per year in India as 30 Mega Joules. If this consumption is met by carbon based fuels and the rate of ... tons (B) 540 million metric tons (C) 5400 million metric tons (D) 2400 million metric tons 

Last Answer : (B) 540 million metric tons

X, Yand Z enter into a partnership by investing in the ratio of 6 : 4: 8. After 1 year, Y invests another Rs. 540,000 and Z, at the end of 2 years, also invests Rs.540,000. At the end of three years, profit is are shared in the ratio of 6 : 8 : 10. Find initial investment of Z. A) 7,20,000 B) 8,80,000 C) 6,50,000 D) 5,50,000.

Description : X, Yand Z enter into a partnership by investing in the ratio of 6 : 4: 8. After 1 year, Y invests another Rs. 540,000 and Z, at the end of 2 years, also invests Rs.540,000. At the end of three years, profit is ... 10. Find initial investment of Z. A) 7,20,000 B) 8,80,000 C) 6,50,000 D) 5,50,000. 

Last Answer : Answer: A) Let the initial investments of X, Yand Z be Rs. 6x, Rs. 4x and Rs. 8x respectively. Then, (6x * 36) : [(4x * 12) + (4x + 540000) x 24] : [(8x * 24) + (8x +540000) x 12]=6:8:10 ... =3/4 => 864x = 432x + 38880000 => 432x = 19440000 x=90000 Z's initial investment = 8x = Rs. 7,20,000.

Tata Docomo charged Rs 540 for 1gb(1day)and aircel charged 90% of RS 540 for the same 1gb for same days. Gowri uses docomo for 1st 15days and remaining 15days uses aircel. If she uses aircel for whole 30days, how much amount she save?

Description : Tata Docomo charged Rs 540 for 1gb(1day)and aircel charged 90% of RS 540 for the same 1gb for same days. Gowri uses docomo for 1st 15days and remaining 15days uses aircel. If she uses aircel for whole 30days, how much amount she save?

Last Answer :  for 1st 15days= 15*540=8100rs for 2nd 15days=90/100*540*15=7290 for 30days=8100+7290=15390 if she uses aircel for 30days=30*540*90/100=14580. Amount save=15390-14580=Rs.810

A DC shunt motor has rated rpm of 480. Certain industrial application requires this motor to run at 540 rpm

Description : A DC shunt motor has rated rpm of 480. Certain industrial application requires this motor to run at 540 rpm for some time. Which speed control will be desirable? A) Ward Leonard control B) Armature ... ) Field resistance control D) It is not possible to run the motor at more than the rated rpm 

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$ The two strands of DNA run in an antiparallel directions DNA is formed of Deoxyribose sugar. Phosphorus and nitrogen bases called purines and pyrimi

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Last Answer : $ The two strands of DNA run in an antiparallel directions DNA is formed of Deoxyribose sugar. Phosphorus and ... wrong D. If both As and R are wrong.