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2. Name the process by which pure copper sulphate can be obtained from its impuresample. 3. Why are light and sound not considered asmatter? 4. Express the boiling point of water in Celsius as well as Kelvinscale. 5. Whatisplasmamembranemadeupof? 6. Name the smallest cell and the longest cell in human body. 7. What isosmosis? 8. Define the term velocity. What is its unit? Is it a scalar or vectorquantity? 9. What is the relationship between distance travelled and the time elapsed for the motion with uniform velocity? 10. What is the acceleration of a body moving uniform velocity? |
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Answer» 2. Copper sulphate can be obtained from an impure sample by crystallisation. The impurities will remain in the mother liquor whereas the pure copper sulphate will crystallize out.3. Because they dont have mass , neither they occupy space nor they are made up of particles or atoms... as in the definition of matter.. Sound an light are not considered as matter because matter is anything which have weight an occupies space and sound and light are not made up of molecules.4. The boiling point of water in Celsius scale is 100 DEGREE celsius and on Kelvin scale it is 373 K!5. All CELLS are surrounded by a plasma membrane. The membrane is composed of a phospholipid bilayer arranged back-to-back. The membrane is also covered in places with cholesterol molecules and proteins. The plasma membrane is selectively permeable and regulates which molecules are allowed to enter and exit the cell.6. The SMALLEST cell is the sperm cell and the largest cell is ovum in the human body. The sperm is a male reproductive cell and they are small in size. The sperm cell head measures about 4 mm in length, just slightly smaller than a red blood cell. The ovum also called egg cell is the reproductive cell in the female body.7. Osmosis is the spontaneous net movement of solvent molecules through a selectively permeable membrane into a region of higher solute concentration, in the direction that tends to EQUALIZE the solute concentrations on the two sides.8. Velocity is a physical quantity that gives both the speed and direction of motion of the body. Defintion: Velocity of a body is defined as the displacement produced per unit time.9. When the body moves with a uniform velocity i.e., it does not change its speed or direction over the travel, the relation of distance and time is proportional, that is distance travelled remains proportional with the time.10. The 'acceleration of a body' moving with uniform velocity will be zero as acceleration is defined as the “rate of change of velocity” per unit time. So if the body EXHIBIT uniform velocity, then the rate of 'change of velocity' (dv = 0) will be zero.I Hope This Will Help You❤️❤️❤️❤️❤️ |
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