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Chemistry Quiz
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The most electropositive element is:
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Which element exhibits both +1 or +3 oxidation states in its compounds?
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What is the total number of p electrons in a single phosphorus atom in its ground state?
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The oxidation state of Cr in potassium dichromate and potassium chromate respectively, are:
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What is the total number of the valence electrons in the peroxydisulphate ion?
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Which set of orbitals is listed in the sequential order of filling in a multi-electron atom?
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Identify the least stable ion amongst the following
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Which of the following ion has smallest radius?
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An element of atomic number 29 belongs to
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The most electronegative element is
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Which of the following does not reflect the periodicity of elements?
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Which among the following element has the lowest value of ionization energy?
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The ionization energy will be maximum for the process
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Which electronic configuration of neutral atom will have the highest first ionization potential?
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Ce(58) is a member of
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Which of the following is isoelectronic with carbon atom?
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Which of the following has maximum ionization enthalpy?
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Which of the following has the largest atomic size?
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The outer electronic configuration of most electronegative element is
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The electron with strong electropositive nature is
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Which ion is not isoelectronic with O²-?
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Which of the following ion has the largest radius?
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What type of atoms do carbohydrates contain
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An electron is known to be in the n = 4 shell and the l = 2 subshell. How many possible combinations of quantum numbers could this electron have?
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The vapour density of a gas is 22. Its molecular weight will be.........
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Which one of the following pairs of compounds illustrates the law of multiple proportions?
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In which of the following metallurgy, no reducing agent is required from outside?
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Lead is mainly extracted by
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The ore which is concentrated by wetting oil is
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Which one of the following is not a method of concentration of ore?
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The two most abundant metals in the earth crust are
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Which one of the following types of metals is expected to occur in the native state?
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Cinnabar is an ore of
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Which one contains both Calcium and Magnesium
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Natural refractory material used in furnaces is
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If a metal has low oxygen affinity then purification of metal may be carried out by
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In the alumino-thermite process, Al acts as
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Highly electropositive metals can not be commercially extracted from carbon reduction process at high temperature because these
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The amount of zinc (atomic weight 65) required to produce 224ml of H2 at STP on treatment with dilute H2SO4 will be
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The percentage of P2O5 in diammonium phosphate (NH4)2HPO4 is
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The equivalent weight of calcium phosphate Ca3(PO4)2 is (Mol. wt. 310)
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The formula of metallic hydroxide (eq. wt. = 150) is M(OH)2. x. H2O. If the atomic weight of the metal is 176 then, the value of x will be
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Which of the following compound has a positive enthalpy of solution?
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Born Haber cycle can be used to estimate
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Which of the following is different from the other three oxides?
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The element having a very high ionization potential but zero electron affinity is
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Second electron gain enthalpy is
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The amount of energy released when an electron is added to its outermost shell of an atom is called
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Ionization enthalpy of an atom is equal to
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Elements having highest ionization potential value is
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Which of the following is not a representative element?
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Which element is named after the name of a planet?
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In the periodic table, the metallic character of elements shows one of the following trend
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The atomic numbers of metallic and non-metallic elements which are liquid at room temperature are
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The number of element present in fifth period is
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Quantum yield is related to...........
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In which of the following combinations of galvanic cells, the rate of corrosion of magnesium is highest in
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During electro galvanizing technique, which metal is used to protect steels against corrosion?
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Rust is hydrated
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Rusting of Iron is enhanced by
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