Transition elements forms alloys easily because they have ..
7%
a) same atomic number
7%
b) same electronic configuration
60%
c) nearly same atomic size
27%
d) all of the above
Q.2.
Which form contains the maximum percentage of carbon? [ PET 1990]
23%
a) Fe(CO)4
46%
b) Fe(CO)5
0%
c) Fe(CO)6
31%
d) Fe(CO)7
Q.3.
Stainless steel does not rust because ... ..
17%
a) Nickel present in it does not rust
25%
b) Iron forms a hard chemical compound with chromium present in it
17%
c) Chromium and nickel combine with iron
42%
d) Chromium forms an oxide layer that protects iron from rusting
Q.4.
Which one of the following characteristics of the transition metals is associated with their catalytic activity? [ AIMPT 2003]
0%
a) Colour of hydrated ions
75%
b) Variable oxidation states
17%
c) High enthalpy of atomisation
8%
d) Paramagnetic behavior
Q.5.
Substances which does not react with cold water but react with steam are
25%
a) C, Ca, SO2
25%
b) Fe, Al Cl2
33%
c) CO2 , Na, Mg
17%
d) C, Fe, Mg
Q.6.
Number of electrons transferred in each case when KMnO4 acts as an oxidizing agent to give MnO2, Mn2+, Mn(OH)3 and MnO42- are respectively ..[ AIEEEE 2002]
22%
a) 3, 5, 4 and 1
33%
b) 4, 3, 1, and 5
44%
c) 1, 3, 4 and 5
0%
d) 5, 4, 3 and 1
Q.7.
Transition metals in their compounds show
25%
a) ioonic bonds
17%
b) covalent bonds
33%
c) ionic and covalent bonds
25%
d) ionic and coordination bonds
Q.8.
Cinnabar is an ore of … [ AIPMT 1991]
50%
a) Hg
0%
b) Cu
40%
c) Pb
10%
d) Zn
Q.9.
Potassium manganite (K2MnOsub>4) is formed when
30%
a) Cl2 is passed in to an aqueous KMnO4 solution
30%
b) MnO2 is fused with KOH in air
20%
c) formaldehyde reacts with KMnO4 in presence of strong alkali
20%
d) KMnO4 reacts with concentrated H2SO4
Q.10.
The most durable metal plating on iron to protect against corrosion is … [ AIPMT 1994]
9%
a) Nickel plating
27%
b) Tin plating
27%
c) Copper plating
36%
d) Zinc plating
Q.11.
Which metal sulphide is not black?
11%
a) NiS
11%
b) CoS
11%
c) CuS
67%
d) ZnS
Q.12.
In acidic medium, H2O2 changes Cr2O72- to CrO5 which has two ( - O – O - ) bonds Oxidation state of Cr in CrO5 is
10%
a) +5
40%
b) +3
40%
c) +6
10%
d) -10
Q.13.
Calomel reacts with ammonium hydrosixe to form …[ AIEEE 2005]
22%
a) Hg(NH2)Cl
33%
b) H2N-Hg-Hg-Cl
22%
c) Hg2O
22%
d) HgO
Q.14.
The grey cast iron contains
18%
a) Iron carbide
36%
b) Silcon carbide
9%
c) Silicon dioxide
36%
d) Graphite
Q.15.
The basic character of the transition metal monoxides follows the order ( At. No Ti=22, V = 23, Cr=24, Fe = 26) [ AIPMT]
9%
a) TiO > FeO > VO > CrO
45%
b) TiO > VO > CrO > FeO
36%
c) VO > CrO > TiO > FeO
9%
d) CrO > VO > FeO > TiO
Q.16.
Which of the following statements about the interstitial compounds is incorrect? [ NEET 2013]
0%
a) They retain metallic conductivity
33%
b) They are chemically reactive
33%
c) They are much harder than the pure metal
33%
d) They have higher melting points than the pure metals
Q.17.
For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order? ( At. nos Cr = 24, Mn = 25, Fe = 26, Co = 27)
9%
a) Cr > Mn > Co > Fe
73%
b) Mn > Fe > Ce > Co
9%
c) Fe > Mn > Co > Cr
9%
d) Co > Mn > Fe > Cr
Q.18.
In context with the transition elements, which of the following statements is incorrect? [ AIEEE 2009]
0%
a) In the highest oxidation states, the transition metal show basic character and form cationic complexes
64%
b) In the highest oxidation states of the first five transition elements (Sc to Mn), all the 4s and 3d-electrons are used for bonding
18%
c) Once the d5 – configuration is exceeded, the tendency to involve all the 3d –electrons in bonding decreases
18%
d) In addition to the normal oxidation states, the zero oxidation state is also shown by these elements in complexes
Q.19.
Most common oxidation states shown by cerium are …[ AIEEE 2002]
8%
a) +2, +4
42%
b) +3, +4
25%
c) +3, +5
25%
d) +2, +3
Q.20.
What is the atomic number of the element with M2+ ion having electronic configuration [Ar] 3d8 [Gujarat-2009]
9%
a) 26
27%
b) 27
64%
c) 28
0%
d) 25
Q.21.
More number of oxidation states are exhibited by the actinides than by the lanthanides. The main reason for this is …[ AIPMT 2005]
36%
a) More energy difference between 5f and 6d- orbitals than that between 4f anda 5d-orbitals
55%
b) Lesser energy difference between 5f and 6d- orbitals than that between 4f and 5d orbitals
9%
c) Greater metallic character of the lanthanides than that of the corresponding actinides
0%
d) More active nature of the actinides
Q.22.
Match Column-A and Column-B properly
Stainless steel
a. In reveting
Bronze
b. In antic piece
Nitinol
c. Nitinol
German silver
d. To make surgical appliances
-- --
e. Cu (75-85%) NI (25-15%)
45%
a) 1 → e; 2 → d; 3 → b; 4 → c
27%
b) 1 → e; 2 → d ; 3 → b; 4 → c
27%
c) 1 → e; 2 → c; 3 → a; 4 → b
0%
d) 1 → e; 2 → c; 3 → a; 4 → d
Q.23.
Which of the following processes does not involve oxidation of iron? [ AIPMT 2015]
15%
a) Rusting of iron sheets
15%
b) Decolourisation of blue CuSO4 solution by iron
31%
c) Formation of Fe(CO)5 from Fe
38%
d) Liberation of H2 from steam by iron a high temperature
Q.24.
Permanent magnets are generally made of alloys of .... ...
17%
a) Co
42%
b) Zn
33%
c) Sb
8%
d) Pb
Q.25.
Mercury is purified by ..[ PET 1990]
0%
a) Solidifying
42%
b) Distillation in vacuum
42%
c) Treatment with dil. HNO3
17%
d) Electrolytic method
Q.26.
With decrease in size of cation:
17%
a) Complex forming tendency decreases.
50%
b) Complex forming tendency increases.
17%
c) Complex forming tendency does not change.
17%
d) None of these.
Q.27.
In the dichromate dianion …[ IIT 1999]
27%
a) 4 Cr-O bonds are equivalent
27%
b) 6 Cr-O bonds are equivalent
36%
c) All Cr-O bonds are equivalent
9%
d) All Cr-O bonds are non-equivalent
Q.28.
All metal chlorides are soluble in water except those of
18%
a) Ag, Pb, Hg
27%
b) Na, K, Ca
27%
c) Zn, Cu, Cd
27%
d) Be, Sr, Li
Q.29.
Which will reduce acidified potassium dichromate solution?
23%
a) Potash alum
38%
b) Mohr’s salt
23%
c) Chile saltpeter
15%
d) White vitriol
Q.30.
Acidified potassium dichromate is treated with hrdrogen sulphide. In the reaction the oxidation number of chromium ..[ PET 1996]
25%
a) Increases from +3 to +6
42%
b) Decreases from +6 to +3
25%
c) Remain unchanged
8%
d) Decreases from +6 to +2
Support mcqgeeks.com by disabling your adblocker.
Please disable the adBlock and continue. Thank you.