Chemistry Quiz
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The most electropositive element is:
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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 is the strongest base?
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Which of the following has the highest electron affinity?
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Which elements exhibit the greatest number of oxidation states in its compounds?
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Which of the following element belongs to the representative group of the periodic table?
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Europium belongs to:
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What is the total number of the valence electrons in the peroxydisulphate ion?
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Which gaseous ion in its ground state has the greatest number of unpaired electrons?
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What is the number of unpaired electrons in a Manganese atom(25) in its lowest energy state?
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Identify the least stable ion amongst the following
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The lanthanide contraction is responsible for the fact that:
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Which of the following is the smallest cation?
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Which of the following ion has smallest radius?
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The element with highest ionization potential from the following is
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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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Eka-aluminum and eka-silicon are known as:
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Aluminum is diagonally related to
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Which of the following does not reflect the periodicity of elements?
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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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Which of the following has the lowest ionization energy?
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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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Which of the following sets of ions represents a collection of isoelectronic species?
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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 of the following ion has the largest radius?
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In REDOX reaction, the oxidizing agent:
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The specific heat of metal is 0.16, its approximate atomic weight would be
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The ratio of the rates of diffusion of a given element to that of helium is 4. What will be the molecular weight of the element?
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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 elements is most abundant in the earth crust?
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Cinnabar is an ore of
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Natural refractory material used in furnaces is
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The process of isolation of a metal by dissolving the ore in suitable reagent followed by precipitation of metal by a more electropositive metals is called
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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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Among the sodium halide, NaF has the highest melting point because of
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Second electron gain enthalpy is
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Ionization enthalpy of an atom is equal to
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The ionization energy will be higher when the electron is removed from
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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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Zinc and Cadmium metals do not show variable oxidation states because
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Transition metals are not characterized by
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In the periodic table, the metallic character of elements shows one of the following trend
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Which of the following is used as a catalytic promoter?
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Cold light is emitted in
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Stress corrosion, fatigue corrosion, and hydrogen embrittlement fall under the category of which type of corrosion?
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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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When Pt and Zn are electrically connected, which one gets corroded?
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The type of corrosion that is very dangerous and difficult to monitor is
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Dry cell is an example of
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Corrosion is accelerated by.....
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which one of the following elements shows both positive and negative oxidation state?
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