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NEET Chemistry MCQ
D- And F- Block Elements Mcq Neet Chemistry
Quiz 1
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Q.1
Identify the incorrect statement. .... [ NEET 2020]
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a) Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals.
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b) The oxidation states of chromium in CrO42- and Cr2O72- are not the same.
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c) Cr2+ (d4) is a stronger reducing agent than Fe2+ (d6) in water.
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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.
Explanation
Answer: (b)
Q.2
The calculated spin only magnetic moment of Cr2+ ion is [ NEET 2020]
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a) 5.92 BM
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b) 2.84 BM
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c) 3.87 BM
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d) 4.90 BM
Explanation
Answer: (d)
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]
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a) Cu(OH)2
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b) CuCO3•Cu(OH)2
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c) CuSO4
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d) [Cu(NH3 )4]2+
Explanation
Answer: (b)
Q.4
Which one is malachite from the following?
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a) CuFeS2
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b) Cu(OH)2
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c) Fe3 O4
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d) CuCO3 .Cu(OH)2
Explanation
Answer: (d)
Q.5
Metallic bond is stronger in transition metals than alkali and alkaline earth metals because of ... ..
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a) more number of electrons iincludiing d-electrons
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b) large size of the atons
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c) paramagetism
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d) diamagnetism
Explanation
Answer: (a)
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. Co
3+
i. √8 B.M.
b. Cr
3+
ii. √35 B.M.
c. Fe
3+
iii. √3 B.M.
d. Ni
2+
iv. √24 B.M.
- -
v. √15 B.M.
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a) a → iv; b &arr i; c &arr ii; &arr iii
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b) a → i; b &arr ii; c &arr iii; d &arr iv
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c) a →iv; b&arr v; c&arr ii; d&arr i
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d) a →iii; b &arr v; c &arr i; d &arr ii
Explanation
Answer: (c)
Q.7
Which of the following species is not stable? [NEEY 2019]
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a) [SiF6]2-
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b) [GeCl6]2-
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c) [Sn(OH)6]2-
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d) [SiCl6]2-
Explanation
Answer: (d)
Q.8
Silver is extracted from argentiferous lead by …[ MPPET 1991]
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a) Mond’s process
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b) Parkes process
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c) Haber’s Process
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d) Bergius process
Explanation
Answer: (b)
Q.9
Rinnmann’s green is
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a) ZnO.CoO
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b) A green pigment
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c) both (a) and (b)
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d) None of these
Explanation
Answer: (c)
Q.10
In which of the following compounds, transition metal has zero oxidation state? [ AIPMT 1999]
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a) Fe(CO)5
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b) NH2.NH2
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c) NOClO4
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d) CrO5
Explanation
Answer: (a)
Q.11
The oxidation state of Cr in K2Cr2O7 is
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a) +5
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b) +3
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c) +6
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d) +7
Explanation
Answer: (c)
Q.12
Assertion: AgNO3 produces a black stain on skin Reason: AgNO3 is a dye
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a) Assertion and Reason both are correct and Reason is correct explanation to Assertion
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b) Assertion and Reason both are correct and Reason is not correct explanation to Assertion
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c) Assertion is correct but reason is wrong
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d) Assertion is wrong but reason is correct
Explanation
Answer: (c)
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]
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a) K2[Cu(CN)4]
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b) K3[Cu(CN)4]
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c) Cu(CN)2
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d) Cu[KCu(CN)4]
Explanation
Answer: (b)
Q.14
Which is used for stopping bleeding?
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a) Ferric chloride
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b) Mohr’s salt
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c) Green vitriol
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d) Sodium nitroprusside
Explanation
Answer: (a)
Q.15
In the following transition metals, the maximum number of oxidation states are exhibited by .. [AIPMT 2000]
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a) Chromium (Z=24)
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b) Manganese ( z=25)
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c) Iron (Z=26)
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d) Titanium (Z=22)
Explanation
Answer: (b)
Q.16
A yellow ppt. is formed when H2S is passed through an acidified solution of ...
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a) Co2+ ions
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b) Cd2+ ions
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c) Cu2+ ions
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d) Ni2+ ions
Explanation
Answer: (b)
Q.17
The highest oxidation state is achieved by which of the following? [ AIEEE 2004]
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a) (n-1)d5, ns2
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b) (n-1)d5, ns1
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c) (n-1)d3, ns2
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d) (n-1)d8, ns1
Explanation
Answer: (a)
Q.18
Which one of the following properties would you not expect copper to exhibit?
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a) Malleability
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b) High thermal conductivity
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c) Low electrical conductivity
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d) Ductility
Explanation
Answer: (c)
Q.19
HgCl2 is reduced to Hg2Cl2 by …
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a) CH3COOH
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b) CCl4
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c) HCOOH
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d) NH3
Explanation
Answer: (c)
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]
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a) Sc3+
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b) Fe2+
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c) Ti3+
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d) Mn2+
Explanation
Answer: (a)
Q.21
Which of the following has more unpaired d-electrons? [ AIPMT 1999]
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a) Zn+
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b) Fe2+
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c) N3+
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d) Cu+
Explanation
Answer: (b)
Q.22
Name the gas that can readily decolourise acidified KMnO4 solution ... [ NEET 2017]
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a) CO2
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b) SO2
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c) NO2
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d) P2O5
Explanation
Answer: (b)
Q.23
Mercury is transported in metal container made of
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a) Silver
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b) Lead
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c) Iron
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d) Aluminium
Explanation
Answer: (c)
Q.24
other forms of iron can be produced from
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a) cast iron
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b) wrought iron
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c) pig iron
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d) steel
Explanation
Answer: (c)
Q.25
Which of the following elements is responsible for oxidation of water to O2 in biological process? [ AIPMT 1997]
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a) Fe
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b) Cu
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c) Mn
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d) Mo
Explanation
Answer: (c)
Q.26
Which statement about corrosive sublimate is incorrect?
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a) It is prepared by heating mercury in chlorine
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b) It reduces stannic chloride
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c) It oxidizes stannous chloride
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d) It sublimes readily
Explanation
Answer: (b)
Q.27
Iron exhibits +2 and +3 oxidation states. Which of the following statements about iron is incorrect? [ AIEEE 2012]
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a) Ferrous compounds are relatively more ionic than the corresponding ferric compounds
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b) Ferrous compounds are less volatile than the corresponding ferric compounds
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c) Ferrous compounds are more easily hydrolysed than the corresponding ferric compounds
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d) Ferrous oxide is more basic in nature than the ferric oxide
Explanation
Answer: (b)
Q.28
Granulated Zn is obtained by ... ..
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a) suffenly cooling molten Zn
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b) adding molten Zn to water
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c) heating Zn from 100 to 150 °C
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d) dropiing molten Zn drop by drop
Explanation
Answer: (b)
Q.29
Which pair of compounds is expected to show similar colour in aqueous solution? [ IIT 2005]
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a) FeCl2, CuCl2
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b) VOCl2 , CuCl2
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c) VOCl2 , FeCl2
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d) FeCl2 , MnCl2
Explanation
colour of the coordination compound is determined by the number of unpaired electron. V4+ and Cu2+ both have one unpaired electron. Answer: (b)
Q.30
ZnSO4 on heating to 800°C gives ... ..
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a) ZnO + SO2 + O2
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b) Zn + SO2
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c) ZnS + O2
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d) Zn + SO2 + O2
Explanation
Answer: (a)
0 h : 0 m : 1 s
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