Miscellaneous MCQ's 3

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a.       Determined atomic mass of elements

b.      Classified elements inot 12 periods

c.       Left empty spaces for undiscovered elements

d.      Placed Na, K with Ca and Mg

      2.       Which one of the following determines the position of an element in the periodic table?

a.       Chemical reactivity

b.      Number of electorns in outer orbital

c.       First ionization energy

d.      Number of protons in the nucleus of its atom

      3.       Lattice energy of carbonate of alkaline earth metals increases down the grup because of

a.       Increase in the size of cation

b.      Decrease in polarization

c.       Both a and c

d.      None of the above

      4.       As we move from groups IA to groups IIA which of the following trend is incorrect

a.       Metallic radus decreases

b.      First ionization energy increases

c.       Thermal stability decreases

d.      Solubility of compounds

      5.       All the following elements of IA group form super oxide except

a.       Na

b.      Rb

c.       K

d.      Cs

     6.       Group of elements in the modern periodic table is based on

a.       Core electrons

b.      Inert electron pair

c.       Valence electrons

d.      Lone pair of electron

      7.       Which of the following elements imparts brick red color in the flame

a.       Na

b.      Ca

c.       K

d.      Sr

      8.       Which of the scientists experimentally proved that element should be arranged in the periodic table on the basic of atomic number and not on the basic of atomic mass

a.       Mendeleev

b.      Newland

c.       Dobereiner

d.      Moseley

      9.       Elements in the periodic table  are classified into four blocks. This classification is bsed upon

a.       Valence orbital

b.      Sub-shell

c.       Shell

d.      All

     10.   Which of the following elements has greatest value of first ionization energy

a.       N

b.      O

c.       C

d.      B

     11.   Which halogenhas greatest value of electron affinity

a.       F

b.      Cl

c.       Br

d.      I

      12.   Ionization energy is the index to the  metallic character. The element which have

a.       Low ionization energy meals

b.      High ionization energy nonmetals

c.       Intermediate metalloids

d.      All

      13.   Which is incorrect statement?

a.       1^st electron affinity value is always negative

b.      Term electronegativity is associated with molecule

c.       Electron affinity is associated with atom

d.      Oxidation number increases down the group

     14.   Which statement about oxidation number is incorrect

a.       Oxidation number increases along the period

b.      Oxidation state is the apparent charge on an atom in the compound

c.       Transition elements show more than one oxidation number

d.      Maximum oxidation number is +7

     15.   Which of the element is the best conductor  of electricity ?

a.       Zn

b.      Fe

c.       Cu

d.      Ca

     16.   Hydration energy depends on

a.       Charge on ion \

b.      Size of ion

c.       Both a and b

d.      None of these

     17.   Hydrogen has which of the following properties?

                a.        it act as reducing agent like IA group elements

                b.      It shows resemble with IA, IVA,VIIA group

                c.       During electrolysis it is collected at cathode like metals

                d.      All

    18.   Keeping in view the size of atoms, which order is correct one?

a.       Mg>Sr

b.      Ba>Mg

c.       Cl>i

d.      Lu>Ce

      19.   Which is incorrect?

a.       All the metal are good conductors of electricity

b.      All the metals are good conductor of heat

c.       All the metals form positive ions

d.      All the metals from acidic oxides

      20.   Which one of the following minerals has no calcium

a.       Gypsum

b.      Dolomite

c.       Calcite

d.      Carnallite

      21.   Which of the following eolement can only react with NaOH

a.       Be

b.      Mg

c.       Ca

d.      Ba

     22.   Which of the following oxides in insoluble ion H2O

a.       BeO

b.      MgO

c.       Both

d.      CaO

      23.   Na is obtained by electrolysis of molten NaCl by

               a.        galvanic cell

               b.      Down cell

               c.       Nelson cell

               d.      Fuel cell

     24.   Which is the use of sulphur?

a.       Essential constituent of plant

b.      Has influence on chlorophyll development of leaves

c.       For the enlargement of root system

d.      All

     25.   Which of the element form polymeric halides?

a.       Na

b.      Al

c.       S

d.      C

     26.   Which is nt a use of lime

a.       As dehydrating agent

b.      In iron extraction

c.       Manufacturing of bleaching powder

d.      As flux in welding

     27.   Oxides of beryllium are

a.       Acidic

b.      Basic

c.       Amphoteric

d.      Neutral

     28.   In electrolysis of aqueous solution of NaCl the primary product obtained at anode electrode is

a.       Na

b.      Cl2

c.       NaOH

d.      NaCl