Description : Pressure Cooker cooks faster because (1) boiling point decreases with rise of pressure (2) it cooks the food at low pressure (3) higher temperature is attained for cooking (4) the material of the cooker is a good conductor
Last Answer : higher temperature is attained for cooking
Description : In the pressure cooker, cooking is faster because the increase in vapour pressure - (1) increase the specific heat (2) decreases the specific heat (3) decreases the boiling point (4) increases the boiling point
Last Answer : (4) increases the boiling point
Description : The boiling point of water decreases at higher altitudes is due to – (1) low temperature (2) low atmospheric pressure (3) high temperature (4) high atmospheric pressure
Last Answer : (2) low atmospheric pressure Explanation: At higher altitudes, the air pressure is decreased, which forces water's boiling point to lower. The air pressure decreases with altitude because of the ... of air. The lowered boiling point of water requires an increase in cooking times or temperature.
Description : The boiling point of water decreases at higher altitudes is due to (1) low temperature (2) low atmospheric pressure (3) high temprature (4) high atmospheric pressure
Last Answer : low atmospheric pressure
Description : Vegetables are cooked in lesser time by adding a pinch of salt while cooking because (1) boiling point of water increases (2) latent heat of vaporization of water decreases (3) latent heat of vaporization of water increases (4) boiling point of water decreases
Last Answer : (1) boiling point of water increases Explanation: Adding salt raises the boiling point of water, which allows food to cook at higher temperature. The higher the temperature, the higher the rate of heat transfer between the food and water, thus it cooks more quickly.
Last Answer : boiling point of water increases
Description : Of the four locations mentioned below, the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open (a) At sea level (b) At the top of Mt Everest (c) ... ) In an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level
Last Answer : Ans:(c)
Description : Boiling point elevation of an ideal solution (A) Increases rapidly with temperature rise (B) Decreases rapidly with temperature rise (C) In independent of pressure (D) Both (B) and (C)
Last Answer : (A) Increases rapidly with temperature rise
Description : The rice is cooked more quickly in a pressure cooker because – (1) it is covered. (2) less quantity of water is used. (3) None of these (4) water boils at a higher temperature under pressure.
Last Answer : (4) water boils at a higher temperature under pressure. Explanation: The rice can be cooked faster in a pressure cooker since the boiling point of water increases with pressure. In general, the higher the ... of the water in a pressure cooker is higher than temperature of the water in an open pot.
Description : The rice is cooked more quickly in a pressure cooker because (1) it is covered. (2) less quantity of water is used. (3) None of these (4) water boils at a higher temperature under pressure.
Last Answer : water boils at a higher temperature under pressure.
Description : Water is not suitable as a calorimetric substance because it – (1) has high specific heat (2) is a good conductor (3) has high boiling point (4) low latent heat of vaporization
Last Answer : (1) has high specific heat Explanation: The specific heat of water is higher than all other common substances. Hence, water is used for heating purposes (as in hot water bottles) and for cooling ... the liquids, mercury has the lowest specific heat due to which it is used as a thermometric liquid.
Description : Water is not suitable as a calorimetric substance because it : (1) has high specific heat (2) is a good conductor (3) has high boiling point (4) low latent heat of vapourization
Last Answer : has high specific heat
Description : At boiling point of liquids, its : (1) Temperature increases (2) Atmospheric pressure increases (3) Timperature remains increases (4) Vapour pressure decreases
Last Answer : (3) Timperature remains increases
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.
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
Description : Pressure cooker is fast in cooking rice because
Last Answer : high pressure raises the boiling point of water
Description : What is the approximate pressure inside a pressure cooker if the water is boiling at a temperature?
Last Answer : Need answer
Description : Why is it easier to cook in a pressure cooker? (a) High pressure creates turbulence (b) More steam is formed inside the cooker (c) Boiling point of water is raised (d) Boiling point of water is lowered
Description : The electrical conductivity of a __________ decreases with rise in temperature. (A) Metal/alloy (B) Semi-conductor (C) Dielectric (D) None of these
Last Answer : (A) Metal/alloy
Description : Steam distillation is not recommended to be used, if the (A) Azeotropic mixture is to be separated and the final product is miscible with water (B) Liquids decompose, if ... unstable or has the tendency to react with other components associated with it, at the boiling temperature
Last Answer : (A) Azeotropic mixture is to be separated and the final product is miscible with water
Description : Boiling point elevation of a solution of NaOH (A) Increases rapidly with temperature rise (B) Is almost independent of temperature (C) Is almost independent of pressure (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : The temperature of boiling water in a steam engine may be high because - (1) there are dissolved substances in water (2) there is low pressure inside the boiler (3) there is high pressure inside the boiler (4) the lire is at very high temperature
Last Answer : (3) there is high pressure inside the boiler Explanation: In the boiler of a steam engine, there is a firebox where coal is shoveled into. The coal is kept burning at a very high temperature, and ... reservoir; the steam is then controlled by a slide valve to move into a cylinder to push the piston.
Description : The temperature of boiling water in a steam engine may be high because : (1) there are dissolved substances in water (2) there is low pressure inside the boiler (3) there is high pressure inside the boiler (4) the fire is at very high temperature
Last Answer : there is high pressure inside the boiler
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.
Description : With the increase of pressure, the boiling point of any substance – (1) Increases (2) Decreases (3) Remains Same (4) Becomes zero
Description : Italians did not cook with tomatoes until the 18th century. Where did the tomatoes come from that inspired Italian cooks and cooking?
Last Answer : From the New World, through Spain. For a long time there was a fear that they were poisonous, because taxonomically they are in the nightshade family.
Description : Ceramic compounds as compared to metallic compounds (A) Crystallise faster (B) Resist greater tensile stress at room temperature (C) Have higher melting temperature (D) Are better conductor of electricity at higher temperature
Last Answer : Option C
Description : For concentrating an aqueous solution of a material like anhydrous Na2SO4, whose solubility decreases with rise in temperature, the most suitable evaporator is a __________ evaporator. (A) High pressure (B) Vacuum (C) Backward feed (D) None of these
Last Answer : (B) Vacuum
Description : What is the reason for cooking in pressure cooker ?
Last Answer : High pressure increases the boiling point of a liquid. So the pressure cooker is cooked quickly.
Last Answer : Cooking in a pressure cooker saves 25% electricity.
Description : I forgot to put water in pressure cooker while cooking , do u have the part that i need to replace It is some kind of nut n bolt near to the wishtle?
Last Answer : Check with Sears parts and Repair in your local area. If they dont have it thet can order it for you. Just check for your model number at the bottom of your pressure cooker.. Check with Sears parts ... can order it for you. Just check for your model number at the bottom of your pressure cooker..
Description : Why is cooking quicker in a pressure cooker?
Last Answer : Ans: The boiling point of water depends upon the pressure on its surface. Steam produced inside the cooker builds up pressure thereby raising the boiling point of water, which results in quick cooking.
Description : Solar cooker takes more time as compared to the LPG to boil potato or rice, yet Kunal uses solar cooker for such type of cooking: (i) Why does Kunal uses Solar cooker instead of LPG? ... answer. (ii) Name the phenomenon which is responsible for obtaining high temperature in solar cooker. -Science
Last Answer : (a)(i) There are no energy losses while cooking on the solar cooker as the food gets cooked in a controlled environment whereas cooking on the LPG leads to maximum percentage of energy loss. ( ... saves a lot of prestigious time which is normally consumed for cooking purpose. (b) Greenhouse effect.
Description : Burns caused by steam are much severe than those caused by boiling water because – (1) Steam pierces through the pores of body quickly (2) Steam has latent heat (3) Steam is gas and engulfs the body quickly (4) Temperature of steam is higher
Last Answer : (2) Steam has latent heat Explanation: When water changes into steam, it absorbs latent heat, and when steam condenses to form water, it gives out an equal amount of latent heat. Bums caused ... boiling water, simply because steam contains more heat (in the form of latent heat) than boiling water.
Description : Burns caused by steam are much severe than those caused by boiling water because (1) Steam pierces through the pores of body quickly (2) Steam has latent heat (3) Steam is gas and engulfs the body quickly (4) Temperature of steam is higher
Last Answer : Steam has latent heat
Description : Outside of cooking utensils are generally left black from below because – (1) it is difficult to clean daily. (2) black surface is a good conductor of heat. (3) black surface is a poor conductor of heat. (4) black surface is a good absorber of heat.
Last Answer : (4) black surface is a good absorber of heat. Explanation: The outside surface of a utensil used for heating is coated black so that it may absorb more heat and make heating quicker. This is because black surface is a good absorber of heat.
Description : Outside of cooking utensils are generally left black from below because (1) it is difficult to clean daily. (2) black surface is a good conductor of heat. (3) black surface is a poor conductor of heat. (4) black surface is a good absorber of heat.
Last Answer : black surface is a good absorber of heat.
Description : Solid type cables are considered unreliable beyond 66 kV because (a) insulation may melt due to higher temperature (b) skin effect dominates on the conductor (c) of corona loss between conductor and sheath material (d) there is a danger of breakdown of insulation due to the presence of voids
Last Answer : (d) there is a danger of breakdown of insulation due to the presence of voids
Description : Boiling point of water gets lowered at high altitudes (e.g., hills), because (A) Temperature is low (B) Atmospheric pressure is low (C) Atmospheric pressure is high (D) None of these
Last Answer : Option B
Description : Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of (A) Thermal cracking (B) Gum formation (C) Coking (D) Discoloration
Last Answer : (C) Coking
Description : Pick out the wrong statement. (A) The binary diffusivity in liquids is of the order of 10 -5 cm2 /sec (B) Molecular diffusion in solid is much faster than that in liquids ( ... Poiseuille's law, the permeability decreases with increase in temperature for flow of a gas through a given capillary
Last Answer : (B) Molecular diffusion in solid is much faster than that in liquids
Description : Dew point of a gas-vapour mixture (A) Increases with temperature rise (B) Decreases with temperature rise (C) Decreases with decrease in pressure (D) Increases with increase in pressure
Last Answer : (C) Decreases with decrease in pressure
Description : If I want the outside of a cake to cook faster because I am using a smaller pan, should I raise the cooking temperature or maybe put the pan on a lower rack?
Last Answer : I would think lower the temperature a little and go a little longer with the cooking. I would have to figure that out by trial and error though. Slower cooking so it goes all the way through seem logical.
Description : 31 Scalding with steam is more severe than scalding by boiling water because A. Steam can penetrate the skin B. Steam is at a higher temperature C. Steam contains more energy than boiling water D. Steam is at a higher pressure
Last Answer : ANSWER: C
Description : Scalding with steam is more severe than scalding by boiling water because (a) steam can penetrate the skin (b) steam is at a higher temperature (c) steam contains more energy than boiling water (d) steam is at a higher pressure
Description : . A dilute aqueous solution is to be concentrated in an evaporator system. High pressure steam is available. Multiple effect evaporator system is employed, because (A) Total heat transfer area of ... in a single effect is much lower than that in any effect in a multi-effect system
Last Answer : (B) Total amount of vapor produced per Kg of feed steam in a multiple effect system is much higher than in a single effect
Description : Which of the following is not a desirable property of a refrigerant (a) highmisibility with oil (b) low boiling point (c) good electrical conductor (d) large latent heat
Last Answer : Ans: c
Description : Ice skating is possible and practical because of a unique property of water. Is it because: w) The coefficient of kinetic friction of steel on frozen water decreases with decreasing temperature x ... sublimes y) The melting point decreases with increasing pressure z) Ice is a good thermal insulator
Last Answer : ANSWER: Y -- THE MELTING POINT DECREASES WITH INCREASING PRESSURE
Description : Water is used in car radiator because of its – (1) low density (2) easy availability (3) high specific heat capacity (4) low boiling point
Last Answer : (3) high specific heat capacity Explanation: Water is used in car radiators because the Specific heat capacity of water is high as a result of which it takes away the heat from engine better compared to ... coolant used in the radiator. If the radiator was to overheat the car would come to a stop.