Question 11. . Organic chemistry began with the investigation of chemicals derived from living beings.
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SCIENCE is the systematic ongoing effort by human beings to study understand and utilise nature for meaningful purposes. If you were to go to the moon, you would weigh less—since there is less gravity—but your mass would remain the same. 3 g oxalic acid dihydrate is made up to 250 ml.
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Your over at this website number and Email id will not be published. SitemapCopyright © 2005 – 2022 ProProfs. 46) If 0. Clean water has BOD which is less than 5 ppm.
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For writing a chemical formula – ‘symbols’ and combining capacity of an element with hydrogen i. 95) What is Hematite?Answer: Ore of iron, Fe203. T. 90) 5 ml of a gas containing only carbon and hydrogen were mixed with an excess of oxygen (30 ml) and the mixture exploded by means of an electric spark. 64 g
Answer: A.
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5 mole of K4[Fe(CN)6] contain carbon = 3g atomsMass of carbon in grams = (12g) [(3g atoms )/(1g atom )] = (12g) [(3g)/(1g)] = 36gQ10: What are metallic/interstitial hydrides? How do they differ from molecular hydrides?Answer:A hydride is a binary chemical that contains an element and a hydrogen atom. 38) 2. Where are they?The two ends of a magnet correspond to the two magnetic poles of the Earth. They are important because they allow us to direct and work with electricity without getting shocked. open(‘POST’, ‘https://www.
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of atoms of carbon 1No. (a) Acids are chemicals whivh are _____ in taste and derived from plants and _____. 43) Which is the metal as strong as steel but half as much in weight?Answer: Titanium.
Give the symbols and Website number of atoms of each element present in(a) sodium chloride
(b) water
(c) carbon dioxide
(d) zinc chloride. Figure out whats cost effective.
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91) Write the two processes by which desilverisation of lead is done:Answer: Parkes process, Pattison’s Process. example, in a mixture of sand and water, sand settles down at the bottom. Chemistry is very helpful in improving the health of human beings by providing Antibiotics, Pain killers, Pencilin, Tetracycline etc. The molality of the solution is ____Answer: 0.
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etc. 29) What is Isotone?Answer: Atoms having an equal number of neutrons. 100) Which catalyst used in the manufacture of Sulfuric acid?Answer: Vanadium pentoxide. reverse(). 10) 3 g of a salt of molecular weight 30 is dissolved in 250 g of water.
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Answer-29:
(a) Zinc and sulphuric acid are Reactants while Zinc sulphate and hydrogen are ProductsThe arrow indicates that the reaction has taken place. Interstitial or metallic hydrides are formed when hydrogen and transition metals bind, as opposed to molecular hydrides, which contain bonding between an electronegative atom and hydrogen. 61) What is Pyrolusite?Answer: Ore of manganese, Mn02. Both energy levels can be used to build bonds since the energy difference between them is so minimal.
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com/collect’, true);
xhr. (b) Symbol [g] represents a gaseous state of hydrogen.
Formation of clothing begins with the knowledge of conversion of fibres into fabrics. All volumes have been reduced to N.
Match the symbols of metallic elements – with their correct combining power or capacity. 9) The scientist who introduced the model of the atom similar to the solar system?Answer: Ernest Rutherford.
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Select the correct answer from the choice in brackets. split(”). You aced 6th grade science. And if these didn’t bust your brain, try your hand at the 30 Questions You’d Need to Ace to Pass 6th Grade Math. We designate another unit of temperature, the degree Celsius (C), in the SI, which is unusual. 23) Give the name of the radioactive isotope of hydrogen:Answer: Tritium.
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Learn all this efficiently using the ICSE study materials at BYJUS. The bulk of oxygen in a pond comes Check This Out microscopic algae. , B. Students are introduced to the idea that matter is composed of atoms and molecules that are attracted to each other and in constant motion. .
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