Identify the incorrect statement. .... [ NEET 2020]
15%
a) Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals.
42%
b) The oxidation states of chromium in CrO42- and Cr2O72- are not the same.
31%
c) Cr2+ (d4) is a stronger reducing agent than Fe2+ (d6) in water.
11%
d) The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.
Q.2.
The calculated spin only magnetic moment of Cr2+ ion is [ NEET 2020]
20%
a) 5.92 BM
28%
b) 2.84 BM
12%
c) 3.87 BM
39%
d) 4.90 BM
Q.3.
Urea reacts with water to form A which will decompose to form B. B when passed through Cu2+ (aq), deep blue colour solution C is formed. What is the formula of C from the following ? [NEET 2020]
16%
a) Cu(OH)2
42%
b) CuCO3•Cu(OH)2
16%
c) CuSO4
25%
d) [Cu(NH3 )4]2+
Q.4.
Which one is malachite from the following?
18%
a) CuFeS2
22%
b) Cu(OH)2
20%
c) Fe3 O4
39%
d) CuCO3 .Cu(OH)2
Q.5.
Metallic bond is stronger in transition metals than alkali and alkaline earth metals because of ... ..
61%
a) more number of electrons iincludiing d-electrons
15%
b) large size of the atons
20%
c) paramagetism
4%
d) diamagnetism
Q.6.
Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code : [NEET 2018]
Column I
Column II
a. Co3+
i. √8 B.M.
b. Cr3+
ii. √35 B.M.
c. Fe3+
iii. √3 B.M.
d. Ni2+
iv. √24 B.M.
- -
v. √15 B.M.
15%
a) a → iv; b &arr i; c &arr ii; &arr iii
22%
b) a → i; b &arr ii; c &arr iii; d &arr iv
54%
c) a →iv; b&arr v; c&arr ii; d&arr i
8%
d) a →iii; b &arr v; c &arr i; d &arr ii
Q.7.
Which of the following species is not stable? [NEEY 2019]
10%
a) [SiF6]2-
39%
b) [GeCl6]2-
34%
c) [Sn(OH)6]2-
17%
d) [SiCl6]2-
Q.8.
Silver is extracted from argentiferous lead by …[ MPPET 1991]
22%
a) Mond’s process
32%
b) Parkes process
37%
c) Haber’s Process
9%
d) Bergius process
Q.9.
Rinnmann’s green is
12%
a) ZnO.CoO
15%
b) A green pigment
70%
c) both (a) and (b)
3%
d) None of these
Q.10.
In which of the following compounds, transition metal has zero oxidation state? [ AIPMT 1999]
47%
a) Fe(CO)5
28%
b) NH2.NH2
14%
c) NOClO4
11%
d) CrO5
Q.11.
The oxidation state of Cr in K2Cr2O7 is
17%
a) +5
27%
b) +3
46%
c) +6
10%
d) +7
Q.12.
Assertion: AgNO3 produces a black stain on skin Reason: AgNO3 is a dye
34%
a) Assertion and Reason both are correct and Reason is correct explanation to Assertion
16%
b) Assertion and Reason both are correct and Reason is not correct explanation to Assertion
41%
c) Assertion is correct but reason is wrong
9%
d) Assertion is wrong but reason is correct
Q.13.
CuSO4 when reacts with KCN forms CuCN which is insoluble in water. It is soluble in excess of KCN due to the formation of the complex ..[ AIPMT 2002]
37%
a) K2[Cu(CN)4]
38%
b) K3[Cu(CN)4]
12%
c) Cu(CN)2
13%
d) Cu[KCu(CN)4]
Q.14.
Which is used for stopping bleeding?
35%
a) Ferric chloride
18%
b) Mohr’s salt
27%
c) Green vitriol
20%
d) Sodium nitroprusside
Q.15.
In the following transition metals, the maximum number of oxidation states are exhibited by .. [AIPMT 2000]
15%
a) Chromium (Z=24)
58%
b) Manganese ( z=25)
21%
c) Iron (Z=26)
6%
d) Titanium (Z=22)
Q.16.
A yellow ppt. is formed when H2S is passed through an acidified solution of ...
24%
a) Co2+ ions
28%
b) Cd2+ ions
36%
c) Cu2+ ions
12%
d) Ni2+ ions
Q.17.
The highest oxidation state is achieved by which of the following? [ AIEEE 2004]
49%
a) (n-1)d5, ns2
25%
b) (n-1)d5, ns1
8%
c) (n-1)d3, ns2
18%
d) (n-1)d8, ns1
Q.18.
Which one of the following properties would you not expect copper to exhibit?
13%
a) Malleability
9%
b) High thermal conductivity
75%
c) Low electrical conductivity
2%
d) Ductility
Q.19.
HgCl2 is reduced to Hg2Cl2 by …
18%
a) CH3COOH
20%
b) CCl4
47%
c) HCOOH
16%
d) NH3
Q.20.
The aqueous solution containing which one of the following ions will be colourless? ( At no Sc=21, Fe=26, Ti=22, Mn=25) [ AIPMT 2005]
54%
a) Sc3+
20%
b) Fe2+
22%
c) Ti3+
4%
d) Mn2+
Q.21.
Which of the following has more unpaired d-electrons? [ AIPMT 1999]
12%
a) Zn+
61%
b) Fe2+
18%
c) N3+
10%
d) Cu+
Q.22.
Name the gas that can readily decolourise acidified KMnO4 solution ... [ NEET 2017]
21%
a) CO2
44%
b) SO2
12%
c) NO2
23%
d) P2O5
Q.23.
Mercury is transported in metal container made of
20%
a) Silver
36%
b) Lead
20%
c) Iron
24%
d) Aluminium
Q.24.
other forms of iron can be produced from
14%
a) cast iron
20%
b) wrought iron
30%
c) pig iron
36%
d) steel
Q.25.
Which of the following elements is responsible for oxidation of water to O2 in biological process? [ AIPMT 1997]
24%
a) Fe
22%
b) Cu
36%
c) Mn
18%
d) Mo
Q.26.
Which statement about corrosive sublimate is incorrect?
33%
a) It is prepared by heating mercury in chlorine
26%
b) It reduces stannic chloride
9%
c) It oxidizes stannous chloride
33%
d) It sublimes readily
Q.27.
Iron exhibits +2 and +3 oxidation states. Which of the following statements about iron is incorrect? [ AIEEE 2012]
26%
a) Ferrous compounds are relatively more ionic than the corresponding ferric compounds
21%
b) Ferrous compounds are less volatile than the corresponding ferric compounds
19%
c) Ferrous compounds are more easily hydrolysed than the corresponding ferric compounds
33%
d) Ferrous oxide is more basic in nature than the ferric oxide
Q.28.
Granulated Zn is obtained by ... ..
5%
a) suffenly cooling molten Zn
31%
b) adding molten Zn to water
41%
c) heating Zn from 100 to 150 °C
23%
d) dropiing molten Zn drop by drop
Q.29.
Which pair of compounds is expected to show similar colour in aqueous solution? [ IIT 2005]
32%
a) FeCl2, CuCl2
34%
b) VOCl2 , CuCl2
14%
c) VOCl2 , FeCl2
20%
d) FeCl2 , MnCl2
Q.30.
ZnSO4 on heating to 800°C gives ... ..
51%
a) ZnO + SO2 + O2
7%
b) Zn + SO2
15%
c) ZnS + O2
27%
d) Zn + SO2 + O2
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