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Chemistry Quiz
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The most electropositive element is:
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Select the correct order of electronegativity(E.N)
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The outer electronic configuration of K, Cu, and Cr are, respectively.
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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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Select the correct order of ionic radii
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The set representing the correct order of the first ionization potential is:
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Which of the following has the highest electron affinity?
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All of the following possess complete d-shell except
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Which elements exhibit the greatest number of oxidation states in its compounds?
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Which gaseous ion in its ground state has the greatest number of unpaired electrons?
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Which of the following is the smallest cation?
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Which property of an element is most dependent on the shielding effect?
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Ionic radii are
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Which of the following molecule has higher lattice energy?
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According to modern periodic law, variations in the properties of elements are related to their
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The correct order of atomic radii is
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Which of the following has highest atomic radius?
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Which among the following element has the lowest value of ionization energy?
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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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Select the correct order of Ionization energy.
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Of the element given, which has the lowest ionization energy?
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Which of the following element is not a p-block element?
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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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Which of the following has the largest radius?
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The outer electronic configuration of most electronegative element is
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Which of the following ion has the largest radius?
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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 law of reciprocal proportions can be used to determine.......
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In which of the following metallurgy, no reducing agent is required from outside?
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Chromium is obtained by reducing concentrated Chromite ore with
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Rutile is separated from chalcopyrite by
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Chemical leaching is useful in the concentration of
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Haematite ore is concentrated by
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Three most occurring elements into the earth crust are
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A mineral is usually associated with a large amount of unwanted material called
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The extraction of zinc from zinc blende is achieved by
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In the alumino-thermite process, Al acts as
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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 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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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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The ionization potential of Boron is less than that of Beryllium because
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Which of the following anion has the smallest radius?
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Zinc and Cadmium metals do not show variable oxidation states because
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Choose the correct statement regarding the transition elements.
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According to modern periodic law, the properties of elements repeat at regular intervals when elements are arranged in order of
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Sodium generally does not show an oxidation state of +2, because of its
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The nucleus of an element contains 9 protons. Its valency would be
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In the periodic table, the metallic character of elements shows one of the following trend
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The number of element present in fifth period is
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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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Rusting of iron is an example of
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Dry cell is an example of
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During electro galvanizing technique, which metal is used to protect steels against corrosion?
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which one of the following elements shows both positive and negative oxidation state?
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