During summer water kept in an earthen pot becomes cool because of the phenomenon of

Ans. D Sol. The old Indian method to cool down the water is, Storing water in earthen pots. These pots have pores in it by which evaporation of water take place. In this Phenomenon, some water molecules get energy from the remaining water molecules in the pot and evaporate. Escape of high energy molecules from water leads to loss of heat from remaining water. As the remaining water loses heat, its temperature decreases. Transpiration is the phenomenon of water movement and evaporation in the plants. In case of diffusion, the molecules of matter moves from higher concentration to lower concentration. In osmosis, the solvent tends to move through a semi permeable membrane from low concentration to high concentration. Hence the correct option is D.

During summer, water kept in an earthen pot becomes cool because of the phenomenon of (a) diffusion (b) transpiration (c) osmosis (d) evaporation Answer: (d) During summer, water kept in an earthen pot becomes cool because of the phenomenon of evaporation. Earthen pot has a large number of tiny pores in its walls and some of the water molecules continuously keep seeping through these pores to outside the pot. This water evaporates continuously and take the latent heat required for vaporization from the remaining water. In this way, the remaining water loses heat and gets cooled. • JEE Main • • • • • • • • • • NEET • • • • • • • • • 12th • • • • • • • • • 11th • • • • • • • • • 10th • • • • • • • • • 9th • • • • • • • • • 8th • • • • • • • • • 7th • • • • • • • • • 6th • • • • • • • • 5th • • • • • • • • • 4th • • • • • • • • • 3rd • • • • • • • • • 2nd • • • • • • • • 1st • • • • • • • • Railways • • • • • • • • UPSC • • • • • • • • SSC • • • • • • • • Banking • • • • • • • • MP State Exams • • • • • • • Clat • • • • • • • Teaching • • • • • • • UP State Exams • • • • • • • Rajasthan State Exams • • • • • • • Jharkhand State Exams • • • • • • • Chhattisgarh State Exams • • • • • • Bihar State Exams • • • • • • • Haryana State Exams • • • • • • • Gujarat State Exams • • • • • • • MH State Exams • • • • • • • Himachal State Exams • • • • • • • Delhi State Exams • • • • • • Uttarakhand State Exams • • • • • • Punjab State Exams • • • • • • J&K State Exams • • • • • • • Defenc...

Answer: B. The change in color is caused by the decrease of the growth of phytoplankton during winter. Explanation: When water looks green, it is because there are a lot of microscopic algae called phytoplankton growing near the surface. Phytoplankton get energy from sunlight, during winter their contribution of photosynthesis is greatly reduced, and a lot of the algae die during the winter, making the water less green. Answer: There is no difference in blood composition of vein and vena cava. Both vein and vena cava carries deoxygenated blood from cells to the heart. From heart, the blood goes to the lungs for cleaning. In lungs, the carbondioxode in the blood is removed and oxygen is loaded in the blood. From lungs the blood goes to the heart and then pumps to all parts of the body. The name of the largest group in the plant kingdom is the Angiosperm. What is the plant Kingdom? The plant kingdom may be defined as a category of living organisms that includes all sorts of plants but excluding algae, fungi, bacteria, animals, etc. The organisms of this type of kingdom have the ability to convert the energy of sunlight into chemical energy through the process of photosynthesis. The organisms of the kingdom Plantae are generally multicellular and eukaryotic that possess cell walls made up of cellulose, hemicellulose, or other compounds like pectins. Among this kingdom, the largest group is the Angiosperm which includes flowering plants. It is one of the largest and most diver...

In some regions of the southwest United States, the water is very hard. For example, in Las Cruces, New Mexico, the tap water contains about 560 g of dissolved solids per milliliter. Reverse osmosis units are marketed in this area to soften water. A typical unit exerts a pressure of 8.0 atm and can produce 45 L water per day. a. Assuming all of the dissolved solids are MgCO3 and assuming a temperature of 27C, what total volume of water must be processed to produce 45 L pure water? b. Would the same system work for purifying seawater? (Assume seawater is 0.60 M NaCl.)

Class 9 Science NCERT Exemplar Solutions for Chapter 1 - Matter in Our Surroundings include the simplest answers and explanations to all the questions. All the class 9 students would find these answers really easy which would help them clear the concepts and perform well in their Class 9 Science Exam. Get a PDF copy of all questions and answers to refer to at your convenience. Multiple Choice Questions 1.Which one of the following sets of phenomena would increase on raising the temperature? (a) Diffusion, evaporation, compression of gases (b) Evaporation, compression of gases, solubility (c) Evaporation, diffusion, expansion of gases (d) Evaporation, solubility, diffusion, compression of gases Answer: c) Evaporation, diffusion and expansion of gases Explanation: Increase in temperature increases the kinetic energy possessed by the particles of matter. All three phenomenon evaporation, diffusion and expansion of gases involve movement of particles away from each other. Therefore, the rate of evaporation, diffusion and expansion of gases increases on raising the temperature. 2.Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions (a) Low temperature, low pressure (b) High temperature, low pressure (c) Low temperature, high pressure (d) High temperature, high pressure Answer: c) Low...

Hint: The earthen pots have small holes and the water keeps on coming out of it which evaporates. The water requires some energy so that the liquid molecules could turn into vapours. This energy is provided by the water in the pot which results in lowering of its temperature. Complete step by step answer : First, let us see all these phenomena. Then, we will be able to find the correct answer. The first process is diffusion. It is the phenomenon of moving particles from regions of higher concentration to regions of lower concentration. For example – Addition of ink in water leads to colouring of water. The second process is the transpiration. It is the process that occurs in plants by which they exhale water vapor through stomata. The third process is the osmosis. It is the phenomenon of moving solvent particles across a semipermeable from a region of low solute concentration to more solute concentration. For example - Red blood cells swell up when exposed to water. The fourth process is the evaporation. It is the process of conversion of surface liquid into the vapours slowly without use of outer energy. For example - The clouds are formed from evaporation of water from the sea surface. Now, as we know all these processes, we can differentiate between them and find out the correct option. The earthen pots are made up of soil and during their formation, some holes are left as such in the soil. The water comes out of these holes in a very minute quantity. This water then ge...

Surahi; an earthen clay pot has several therapeutic and health benefits. Most people are habitual to drink water from a clay pot albeit they do not know the merits and reasons behind the doing. If you are perhaps wondering as well as, this is your ultimate guide. During the scorching summer months, our body needs more water than usual to stay hydrated and beat the heat of sun. In the process of the aforementioned, one often gulps down water straight out from a refrigerator which harms our body's temperature at the moment than that in the sun. Harmful Health Effects of Refrigerator Water • Decreased Heart Rate • Constipation • Headaches • Fat storage • Exposure to microorganisms At the times when refrigerators were not widely used, Surahi used to come in handy. These earthen pots stored water and helped in cooling the water naturally. This age old practice is extensively a healthy alternative to switch and adopt. Here are a few reasons why this summers you should drink water from a surahi. Read more: Benefits Of Using A Surahi 1. Natural cooling properties Storing water in a surahi/clay pot aids the natural cooling of water. A surahi has tiny breathable pores on the surface and water evaporates quickly through these pores. The evaporation process ensures the heat of the water inside the pot is lost, which lowers the temperature of the water and so the water remains cool. 2. Gentle on the throat Drinking cold water directly from the refrigerator can cause itching and sorenes...

The water inside theearthen pot become cold during the summer because the earthen pot is porous with a lot of pores in it. So, water comes out on the surface of the earthen pot, and this water gets evaporated. And thus the temperature of water present inside the pot has a much lower temperature than outside, and hence water becomes cold.