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question_answer1) \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] represent the compound
question_answer2) Which one is a bivalent ion?
question_answer3) The chromate and dicharomate ions are respectively
question_answer4) The formula of sodium pyrophosphate is
question_answer5) The branch of chemistry which deals with study of physical properties and conditions is
question_answer6) The branch of chemistry which deals with study of the methods of detection and determination of elements and compounds is
question_answer7) Valency of an atom or radicals is
question_answer8) When electrons are added the resulting ion is called
question_answer9) Which of the following is most unreactive?
question_answer10) Chemical formula of Aluminium sulphate is
question_answer11) Select the one that represents a displacement reaction.
question_answer12) Which one is a combination reaction?
question_answer13) Which of the following involves combination of two elements?
question_answer14) When hydrogen sulphide gas is passed through a blue solution of copper sulphate, a black precipitate of copper sulphide is formed. This is an example of
question_answer15) Which one is a decomposition reaction?
question_answer16) The reactions in which two compounds exchange their radicals to form two new compounds are called
question_answer17) \[CuO+{{H}_{2}}\to Cu+{{H}_{2}}O\]Above reaction is an example of
question_answer18) In the reaction : \[PbO+C\to Pb+CO\]
question_answer19) Chemical equations are balanced in accordance with the
question_answer20) Which is not a balanced equation?
question_answer21) Which of the following statements is true about chemical equation?
question_answer22) A molal solution is one that contains 1 mole of a solute in
question_answer23) The total number of atoms represented by the compound \[CuS{{O}_{4}}.\,5{{H}_{2}}O\]is
question_answer24) The molecular formula \[{{P}_{2}}{{O}_{5}}\] mean s that
question_answer25) The empirical formula and molecular mass of a compound are \[C{{H}_{2}}O\] and 180 g respectively what will be the molecular formula of the compound?
question_answer26) The empirical formula of a compound is One mole of this compound has a mass of 42 grams. Its molecular formula is:
question_answer27) Which of the following statements is not correct?
question_answer28) \[AgN{{O}_{3}}(aq)\to AgCl(s)+NaN{{O}_{3}}(aq)\]Above reaction is -
question_answer29) A redox reaction is one in which -
question_answer30) An organic compound containing C, H and N gave the following analysis: C = 40% ; H= 13.33%; N = 46.67% Its empirical formula would be
question_answer31) An organic compound containing C, H and 0 gave on analysis C - 40% and H - 6.66%. Its empirical formula would be
question_answer32) Slow eating away of iron articles in the presence of moist air is called
question_answer33) Which of the following reaction is endothermic?
question_answer34) The observation that does not indicate a chemical reaction is
question_answer35) Which one of the following is not an exothermic reaction?
question_answer36) Which of the following statement is not correct? To prevent food from getting rancid, we
question_answer37) In the following equations : \[NaC{{O}_{3}}+xHCl\to 2NaCl+C{{O}_{2}}+{{H}_{2}}O\]the value x is
question_answer38) Which of the following is not an endothermic process?
question_answer39) Rusting of an iron is an example of
question_answer40) Which of the following does not corrode when exposed to the atmosphere?
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