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Chemistry Quiz
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The most electropositive element is:
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The outer electronic configuration of K, Cu, and Cr are, respectively.
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Which element can exhibit more than one oxidation state in compounds?
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All of the following possess complete d-shell except
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In which of the following compounds is the size of the cation to anion ratio minimum?
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The oxidation state of Cr in potassium dichromate and potassium chromate respectively, are:
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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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Select the correct order of ionic radii
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Eka-aluminum and eka-silicon are known as:
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The correct order of atomic radii is
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The most electronegative element is
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Which electronic configuration of neutral atom will have the highest first ionization potential?
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Which of the following is isoelectronic with carbon atom?
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Which orbital fills completely immediately before 4f?
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Which relationship between the radii of these species is correct?
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Which of the following element is not a p-block element?
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Which of the following has the lowest ionization energy?
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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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Which of the following sets of ions represents a collection of isoelectronic species?
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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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A metallic oxide contains 66% of the metal. The equivalent weight of the metal is
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The vapour density of a gas is 22. Its molecular weight will be.........
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The hydrogen phosphate of certain metals has the formula MHPO4. The formula of metal chloride would be
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Aluminium is used as reducing agent in the reduction of
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Lead is mainly extracted by
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The element which is recovered from the electrolytic process is
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Chromium is obtained by reducing concentrated Chromite ore with
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Extraction of aluminum from bauxite ore reduction is carried out by
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The most abundant metal in earth crust is
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The ore which is concentrated by wetting oil is
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Which one of the following types of metals is expected to occur in the native state?
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Which one of the following is not an ore of Aluminium?
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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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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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Among the sodium halide, NaF has the highest melting point because of
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The element having a very high ionization potential but zero electron affinity is
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To which of the following elements, the addition of electrons is most difficult?
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The second ionization potential of elements is higher than its second ionization potential because
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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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According to modern periodic law, the properties of elements repeat at regular intervals when elements are arranged in order of
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Transition metals are not characterized by
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The nucleus of an element contains 9 protons. Its valency would be
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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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Zincification involves ........................metal.
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Dry cell is an example of
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Rust is hydrated
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In galvanic series, Which metals are most passive?
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Dry corrosion is
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which one of the following elements shows both positive and negative oxidation state?
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