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Q. What do you mean by Rounding off numbers?
Rounding off numbers while you report a calculation your answer should have no more significant figures than the piece of data you used in your computation with the fewest number of significant figures. Therefore if you calculate the density of an object with a mass of 12.33 g in addition to a volume of 19.1 cm3 your answer must have only three significant figures. Though when you divide these quantities using your calculator it will show 0.6455497-lots more figures than you can report in your answer. You must round off the number to three significant figures or 0.646.
Q. Explain the Purity Tests of sesame oil? Purity tests for oils/fats would include analyzing the samples for the presence of sesame oil, cottonseed oil, linseed oil, argemone
which postulate of daltons theory can explain the law of definite proportions
Silicon has 4 electrons in the outermost orbit. In forming the bonds: (1) It gains electrons (2) It loses electrons (3) It shares electrons (4) None of these Ans: I
what is resonence effect on acidity
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what is fractional distillation
Which one of the following compound is ionic: (1) KCl (2) CH 4 (3) Diamond (4) H 2 Ans: KCl
Q. What is Atomic emission spectra? Atomic emission spectra while atoms of an element in the gaseous phase are excited by an input of energy such as that from a high-voltage
Ciprofloxacin is used to fight bacterial infections.
Q. Describe about Electron Configurations? As you will study the number and arrangement of electrons around the nucleus of an atom determines its chemical properties. Consequen
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