Description : What happens when osmium is heated from 4000°c to 6000°c?
Last Answer : It boils
Description : A complex anion is formed by Osmium ( in some oxidation state ) with ligands ( in proper number so that coordination number of osmium becomes six ). W
Last Answer : A complex anion is formed by Osmium ( in some oxidation state ) with ligands ( in proper number ... ) C. azidopentachloridoosmate(VI) D. None of these
Description : Which metal is heaviest - (1) osmium (2) mercury (3) iron (4) nickel
Last Answer : (1) osmium Explanation: I assume by "heaviest," you mean "densest;" in that case, the densest chemical element is osmium (which is a metal). Osmium has a density of around 22 grams per cubic centimeter.
Description : Which is the heaviest metal? A. Iron B. Mercury C. Nickel D. Osmium (Answer)
Last Answer : D. Osmium (Answer)
Description : Which one of the following elements is not found in nature? w) Technetium x) Iridium y) Osmium z) Molybdenum
Last Answer : ANSWER: W -- TECHNETIUM
Description : Conduction occurs in the buffer zone for a fluid flowing through a heated pipe, only when Prandtl number is (A) 0.1 (B) > 1 (C) < 1 (D) 1
Last Answer : (A) 0.1
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
Description : Which products will be obtained when lead nitrate is heated simply. Write balanced chemical equation for the reaction? State the type of chemical reaction that occur in the change. -Chemistry
Last Answer : Answer. Lead monoxide, nitrogen dioxide and oxygen gas will be liberated. It is thermal decomposition reaction.
Description : When water is heated from 0 degree C to 20 degree C, how does its volume change? -Do You Know?
Last Answer : answer:
Description : When water is heated it turns into water vapor ' What kind of change is it ?
Last Answer : When water is heated it turns into water vapor ' This is a physical change.
Description : When a gas is heated the particles move more quickly. What is the change in volume of a heated gas if the pressure is kept constant ?
Last Answer : When a gas is heated the particles move more quickly. What is the change in volume of a heated gas if the pressure is kept constant ?
Description : Is Melting coin being heated and turn black this is used as a test for metal a chemical or a physical change?
Last Answer : hg
Description : When sugar canalize on being heated above its melting point is physical change or chemical?
Last Answer : Melting is a physical process.
Description : Is Steel rod Be heated into a molten metal is example of a phase change?
Last Answer : Feel Free to Answer
Description : When a warm object is heated up why does the thermal radiation emits change?
Description : How does the speed of the molecule of a gas Change when the gas is heated?
Last Answer : it moves faster
Description : When water is heated from 0°C to 10°C. Its volume (1) increases (2) decreases (3) does not change (4) first decreases and then increases
Last Answer : (4) first decreases and then increases
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.
Description : The density of the liquid when heated (1) decreases (2) increases (3) does not change (4) may increase of decrease depending on pressure
Last Answer : (1) decreases Explanation: The mass density of a material varies with temperature and pressure. Increasing the temperature of a substance (with some exceptions) decreases its density by increasing the volume of ... bottom to top of the fluid due to the decrease of the density of the heated fluid.
Description : A metal sheet with circular hole is heated. what change will be in the hole?
Last Answer : It will Expand
Description : When water is heated from 0 degree C to 20 degree C, how does its volume change?
Last Answer : t shall increase
Description : A chemical change takes place when iron (A) Rusts (B) Melts (C) Is heated (D) None of these
Last Answer : (A) Rusts
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
Description : Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ. (A) +4000 (B) -4000 (C) 10000 (D) -10000
Last Answer : (A) +4000
Description : Water (specific heat cv= 4.2 kJ/ kg ∙ K ) is being heated by a 1500 W h eater. What is the rate of change in temperature of 1kg of the water? A. 0.043 K/s B. 0.179 K/s C. 0.357 K/s D. 1.50 K/s Formula: Q = mcv ( T)
Last Answer : 0.179 K/s
Description : A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation number? (1) C (2) S (3) H (4) Cl
Last Answer : Cl
Description : Which of the following is the best example of law of conservation of mass? [NCERT 1975] (A) 12 g of carbon combines with 32 g of oxygen to form 44 g of CO2. (B) When 12 g of carbon is ... mass remains unaltered. (D) The weight of a piece of platinum is the same before and after heating in air.
Last Answer : (A) 12 g of carbon combines with 32 g of oxygen to form 44 g of CO2.
Description : 1. Which post does the Constitution of India does not mention? 2. What is the Solar Corona' mainly? 3. Who was a blind poet who worshipped Krishna and spread Krishna Bhakti cult? 4. A ... ? 20. By inserting a soft iron piece into solenoid, what does the strength of the magnetic field?
Last Answer : Answer : 1. The Deputy Prime Minister 2. Consists of molten lava 3. Surdas 4. It will Expand 5. The Bank Note Press, Dewas 6. Kathak 7. Hydrogen 8. Alain khan, the father of Dilawar Khan 9. ... Sarwani 14. 1991 15. 15 16. 46 gram 17. Chinook 18. Painters 19. State Election Commission 20. Increase
Description : 1. Who was the only Indian woman who became President of WHO? 2. When water is heated from 0 degree C to 20 degree C, how does its volume change? 3. Which is a form of heart disease in ... is the largest temperate desert of the world? 20. In whose rule was Islam, as the state religion, abolished?
Last Answer : Answer : 1. Raj Kumari Amrit Kaur 2. It shall increase 3. Angina 4. Mediterranean 5. Bull capital, Rampurva 6. The Union Home Minister 7. Sodium or potassium salts of heavier fatty acids 8. 1994 9. ... .A.-Russia 15. In Cambodia 16. 5 17. Painting 18. Revenue receipts 19. Patagonian desert 20. Akbar
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
Last Answer : decreases