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Home⇒ Everyday Science GK⇒ Chemistry
Note:- You can add tough questions into your favourite list for second revision. |
Q41 ⇒ The most electropositive elements among the following is Cs [other wrong options] [Discuss in forum] Na Ca K |
Q42 ⇒ The maximum number of covalent formed by nitrogen is 4 [other wrong options] [Discuss in forum] 1 2 3 |
Q43 ⇒ The metal that is used as a catalyst in the hydrogenation of oils is Ni [other wrong options] [Discuss in forum] Pb Cu Pt |
Q44 ⇒ The material which can be deformed permanently by heat and pressure is called a thermoset [other wrong options] [Discuss in forum] thermoplastic chemical compound polymer |
Q45 ⇒ The gas used for artificial ripening of green fruit is ethylene [other wrong options] [Discuss in forum] ethane carbon dioxide acetylene |
Q46 ⇒ The number of electrons presents in His zero [other wrong options] [Discuss in forum] one two three |
Q47 ⇒ The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is ozone [other wrong options] [Discuss in forum] helium oxygen methane |
Q48 ⇒ The monomer of polythene is ethylene [other wrong options] [Discuss in forum] vinyl chloride ethyl alcohol None of the above |
Q49 ⇒ The mineral containing both magnesium and calcium is dolomite [other wrong options] [Discuss in forum] magnesite calcite carnallite |
Q50 ⇒ The formula CH-CO-CHrepresents Acetophenone [other wrong options] [Discuss in forum] Acetone Acetic acid Phenyl acetate |
Q51 ⇒ The metal used to recover copper from a solution of copper sulphate is Fe [other wrong options] [Discuss in forum] Na Ag Hg |
Q52 ⇒ The metal that is usually extracted from sea water is Mg [other wrong options] [Discuss in forum] Ca Na K |
Q53 ⇒ The hottest part of the gas flame is known as non-luminous zone [other wrong options] [Discuss in forum] luminous zone dark zone blue zone |
Q54 ⇒ The mass number of a nucleus is the sum of the number of protons and neutrons present in the nucleus [other wrong options] [Discuss in forum] always less than its atomic number always more than the atomic weight a fraction |
Q55 ⇒ Zone refining is used for the purification of Ge [other wrong options] [Discuss in forum] Au Ag Cu |
Q56 ⇒ The most abundant rare gas in the atmosphere is Ar [other wrong options] [Discuss in forum] He Ne Xe |
Q57 ⇒ The metal does not give Hon treatment with dilute HCL is Ag [other wrong options] [Discuss in forum] Zn Fe Ca |
Q58 ⇒ The most commonly used bleaching agent is chlorine [other wrong options] [Discuss in forum] alcohol carbon dioxide sodium chlorine |
Q59 ⇒ The luster of a metal is due to presence of free electrons [other wrong options] [Discuss in forum] its high density its high polishing its chemical inertness |
Q60 ⇒ The method of concentrating the ore which makes use of the difference in density between ore and impurities is called levigation [other wrong options] [Discuss in forum] liquation leaching magnetic separation |
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