Chemistry Quiz

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chemistry 2

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 exhibits both +1 or +3 oxidation states in its compounds?

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Select the correct order of ionic radii

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Which is the largest stable atom?

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Europium belongs to:

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The oxidation state of Cr in potassium dichromate and potassium chromate respectively, are:

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Alkali metals in each period have:

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Which gaseous ion in its ground state has the greatest number of unpaired electrons?

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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 has lowest ionization enthalpy?

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Which of the following has largest size

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How many unpaired electrons are in a gaseous Fe2+ ion in its ground state?

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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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An element having atomic number 56 belongs to which block?

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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 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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All of the following are true with respect to carbonyls EXCEPT:

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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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A metallic oxide contains 66% of the metal. The equivalent weight of the metal is

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The specific heat of metal is 0.16, its approximate atomic weight would be

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The equivalent weight of KMnO4 (in acid medium) is (At.wt.of K =39, Mn=55)

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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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Bassemerisation is  carried out for

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Lead is mainly extracted by

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Extraction of aluminum from bauxite ore reduction is carried out by

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Rutile is separated from chalcopyrite by

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The ore which is concentrated by wetting oil is

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Haematite ore is concentrated by

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Froth flotation process for the concentration of sulfide ores is an illustration of the practical application of

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Three most occurring elements into the earth crust are

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The metal which mainly occurs as oxide ore in nature is

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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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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 percentage of P2O5 in diammonium phosphate (NH4)2HPO4 is

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Born Haber cycle can be used to estimate

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The hydration energy of Mg²+ ions is lesser than that of

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Second electron gain enthalpy is

 

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The second ionization potential of elements is higher than its second ionization potential because

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The second ionization energy is maximum for

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The ionization potential of Boron is less than that of Beryllium because

 

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The period number and group number of Tantalum (z=73) are respectively

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Which element is named after the name of a planet?

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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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Which of the following statements is incorrect about the adsorption theory?

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Rusting of iron is an example  of

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The type of corrosion that is very dangerous and difficult to monitor is

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In galvanic series, Which metals are most passive?

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Rusting of Iron is enhanced by

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Dry corrosion is

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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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