Q.1
While extracting an element from its ore, the ore is grind and leached with dil. KCN solution to form the soluble product potassium argento-cyanide. The element is …[ AIPMT 1989]
  • a) Lead
  • b) Chromium
  • c) Manganese
  • d) Silver
Q.2
The solubility of silver bromide in hypo solution is due to the formation of ..
  • a) Ag2SO3
  • b) Ag2S2O3
  • c) [Ag(S2O3 )]-
  • d) [Ag(S2O3 )2]3-
Q.3
Why do theoritical value of magnetic moment differ from their practical value ?
  • a) Due to decrease in volume of metal ion.
  • b) Due to unsymmetrical arrangement of dipoles in orbital.
  • c) Due to rotation-orbital combination.
  • d) Both are different methods to calculate magnetic moment.
Q.4
Amalgams are
  • a) Always solid
  • b) Highly coloured alloys
  • c) Alloys which contain mercury as one of the contents
  • d) Compounds of mercury
Q.5
The electronic configuration of actinoids can not be assigned with degree of certainty because of
  • a) Small energy difference between 5f and 6d-levels
  • b) Overlapping of inner orbitals
  • c) Free movement of electrons over all the orbitals
  • d) None of the above
Q.6
Among the following series of transition metal ions, the one in which all metal ions have 3d2 electronic configuration is ..(At.no, Ti=22, V=13, Cr=24, Mn=25) [ AIPMT 2004]
  • a) Ti3+, V2+, Cr3+, Mn4+
  • b) Ti+, V4+, Cr6+, Mn7+
  • c) Ti4+, V3+, Cr2+, Mn3+
  • d) Ti2+, V3+, Cr4+, Mn5+
Q.7
The highest magnetic moment is shown by the transition metal ion with the outer electronic configuration ..[ PET 1993]
  • a) 3d2
  • b) 3d5
  • c) 3d7
  • d) 3d9
Q.8
Which is formed when iron reacts with carbon?
  • a) FeC2
  • b) Fe3C
  • c) FeC3
  • d) Fe2C
Q.9
Which one of the following statements related to lanthanons is incorrect? [ NEET 2016]
  • a) Europium shows +2 oxidation state
  • b) The basicity decreases as the ionic radius decreases from Pr to Lu
  • c) All the lanthanons are much more reactive than aluminium
  • d) Ce(+4) solution are widely used as oxidizing agent in volumetric analysis
Q.10
Transition elements are coloured due to ... ..
  • a) Small size
  • b) Metallic nature
  • c) unpaired d-electrons
  • d) None of these
Q.11
In aqueous solution, Eu2+ acts as
  • a) An oxidizing agent
  • b) Reducing agent
  • c) Can act as either of these
  • d) Can act as redox agent
Q.12
In which of the following pairs are both the ions coloured in aqueous solution? ( At no Sc=21, Ti=22, Ni=28, Cu=29) [AIPMT 2006]
  • a) Ni2+, Ti2+
  • b) Sc3+, Ti3+
  • c) Sc3+, Co2+
  • d) Ni2+, Cu+
Q.13
Which compound cannot be prepared?
  • a) Zn(OH)2
  • b) Cd(OH)2
  • c) Hg(OH)2
  • d) HgCl2
Q.14
Match column-A and column-B properly.
Brass a. Ni (60%) Cr (40%)
Bronze b. Cu (80%) Sn (20%)
Cupronicle c. Cu (90%) Sn (10%)
Nichrome d. Cu (70%) Zn (30%)
-- -- e. Cu (75-85%) NI (25-15%)
   
  • a) 1 → d;   2 → c;   3 → e;   4 → a
  • b) 1 → d;   2 → c;   3 → e;   4 → b
  • c) 1 → d;   2 → e;   3 → a;   4 → b
  • d) 1 → e;   2 → c;   3 → a;   4 → d
Q.15
Nessler’s reachent is …[ PET 1993]
  • a) KHgI4
  • b) K2HgI4
  • c) K2HgI4 + NaOH
  • d) KHgI4 + NaOH
Q.16
The properties of Zr and Hf are similar because ... ..
  • a) both belong to d-blck
  • b) both belong to same group of the periiodic table
  • c) both have similar radiii
  • d) both have same number of electrons
Q.17
The reduction of aqueous KMnO4 with H2O2 in acidic conditions gives [ AIPMT 2014]
  • a) Mn4+ and O2
  • b) Mn2+ and O2
  • c) Mn2+ and O3
  • d) Mn4+ and MnO2
Q.18
On which factor, does the stability of an oxidation state in lanthanide elements depend ? [Gujarat-2008]
  • a) Combined effect of hyadration energy and ionization energy.
  • b) Electronic configuration
  • c) Enthalpy
  • d) Internal energy
Q.19
Which ore contains both iron and copper? [ IIT 2005]
  • a) Cuprite
  • b) Chalcocite
  • c) Chalcopyrite
  • d) Malachite
Q.20
Nitriding is the process of surface hardening of steel by treating it in an atmosphere of ..[ AIPMT 1989]
  • a) NH3
  • b) N2
  • c) O3
  • d) H2S
Q.21
A element having atomic no. 56 is included in [AFMC-2003]
  • a) Lanthanides
  • b) Actindies
  • c) Alkaline earth metals
  • d) None of above
Q.22
The correct order of ionic radii of Y3+, La3+, Eu3+ and Lu3+ ( At.no. Y=39, La=57, Eu = 63, Lu=71) [ AIPMT 2003]
  • a) Lu3+ < Eu3+ < La3+ < Y3+
  • b) La3+ < Eu3+ < Lu3+ < Y3+
  • c) Y3+ < La3+ < Eu3+ < Y3+
  • d) Y3+ < Lu3+ < Eu3+ < La3+
Q.23
Which of following statement is correct for transition elements ? [AFMC - 2002]
  • a) They are very active.
  • b) They show variable valencies.
  • c) They show lower melting point.
  • d) They are stong electropositive elements.
Q.24
Which one of the following ionic species will impart colour to an aqueous solution? [ AIPMT 1998]
  • a) Ti4+
  • b) Cu+
  • c) Zn2+
  • d) Cr3+
Q.25
A blue colouration is not obtained when …
  • a) Ammonium hydroxide dissolves in copper sulphate
  • b) Copper sulphate solution reacts with K4[Fe(CN)6]
  • c) Ferric chloride reacts with sodium ferrocyanide
  • d) Anhydrous white CuSo4 is dissolved in water
Q.26
In the electrolytic purification of copper some gold is found in the …
  • a) Cathode
  • b) Cathode mud
  • c) Anode mud
  • d) None of these
Q.27
Which of the following is amphoteric oxide? [ AIEEE 2003]
  • a) SO2
  • b) B2O3
  • c) ZnO
  • d) Na2O
Q.28
Ferric oxide in furnace is reduced by …
  • a) C
  • b) H2
  • c) CO
  • d) CO2
Q.29
Which statement about group 12 elements is wrong? [ PET 1991]
  • a) Zinc forms an alloy with copper
  • b) Zn22+ is stable
  • c) Mercury gives compounds with +1 and 2+ valencies
  • d) Hg is liquid element
Q.30
Zinc white is a better white pigment than lead white because it …
  • a) Has more covering power than lead white
  • b) Is not blackened by the action of H2S
  • c) Is soluble in water
  • d) Becomes yellow when heated
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