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NEET Chemistry MCQ
D- And F- Block Elements Mcq Neet Chemistry
Quiz 3
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Q.1
The common oxidation states of Ti are …[ AIPMT 1994]
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a) +2, +3
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b) +3, +4
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c) 3, -4
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d) +2, +3, +4
Explanation
Titanium has the electron configuration of [Ar]3d2 4s2 he +4 state is the most common and stable, because it is able to form an octet. The +3 state is less stable (more reactive) because it leaves a single d electron in the valence orbital. The chemistry of titanium in the +2 state is rather restricted Answer: (b)
Q.2
Bell-metal is an alloy of …[ AIPMT 1999]
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a) Cu + Pb
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b) Cu + Sn
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c) Cu + Zn
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d) Cu + Ni
Explanation
Answer: (b)
Q.3
Match column-A and B
Column-A
Column-B
V
4+
a. colourless
Ti
3+
b. pink
Ti
4+
c. purple
Mn
2+
d. blue
-- --
e. vilot
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a) 1 → d; 2 → c; 3 → a; 4 → e
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b) 1 → d; 2 → c; 3 → a; 4 → b
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c) 1 → d; 2 → e; 3 → a; 4 → b
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d) 1 → e; 2 → c; 3 → b; 4 → a
Explanation
Answer: (b)
Q.4
The metal present in insulin is …[ CET Kurukshetra 1992]
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a) Cu
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b) Fe
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c) Zn
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d) Mg
Explanation
Answer: (c)
Q.5
Zinc, cadmium and mercury are ..
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a) d-block elements
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b) p-block elements
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c) s-block elements
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d) f-block elements
Explanation
Answer: (a)
Q.6
Which of the following statements(s) is/are correct with reference to the ferrous and ferric ions? [ IIT 1998]
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a) Fe3+ gives brown colour with potassium ferricyanide
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b) Fe3+ gives blue precipitate with potassium ferricyanide
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c) Fe3+ gives red colour with potassium ferricyanide
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d) All of the above
Explanation
Answer: (d)
Q.7
Which of the following arrangements does nt represent the correct order of the property stated against it ? …[ JEE 2013]
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a) Co3+ < Fe3+ < Cr3+ < Sc3+ : Stability in aqueous solution
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b) Sc < Ti < Cr < Mn : number of oxidation states
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c) V2+ < Cr2+ < Mn2+ < Fe2+ : paramagnetic behavior
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d) Ni2+ < Co2+ < Fe2+ < Mn2+ : iionic size
Explanation
Answer: (c)
Q.8
Platinum, palladium, iridium, etc,. are called noble metals because..
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a) Alfred Nobel discovered them
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b) They are inert towards many common reagents
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c) They are shining, lustrous and pleasing to look
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d) They are found in native state
Explanation
Answer: (b)
Q.9
Cuprous compounds such as CuCl, CUCN and CuSCN are the only salts stable in H2O due to …[ AIMPT 1996]
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a) High hydration energy of Cu+ ions
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b) Their inherent tendency not to disproportionate
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c) Diamagnetic nature
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d) Insolubility in water
Explanation
Answer: (a)
Q.10
Assertion : Potassiium ferrocyanide is diamagnetic, whereas potassium ferricyanide is paramagnetic Reason : Crystal filed splitting in ferrocyanide ion is greater than that of ferricyanide ion
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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.11
The lanthanoids contraction is responsible for the fact that …[ AIEEEE 2005]
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a) Zr and Y have about the same radius
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b) Zr and Nb have similar oxidation state
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c) Zr and Hf have about the same radius
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d) Zr and Zn have the same oxidation state
Explanation
Answer: (c)
Q.12
Which of Lanthanide compound is used in pigment ? (Gujarat-2009)
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a) Tb(OH)3
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b) Lu(OH)3
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c) Ce(OH)3
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d) CeO2
Explanation
Answer: (d)
Q.13
Photographic plates and films have an essential ingredient of …[ AIPMT 1989]
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a) Silver nitrate
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b) Silver bromide
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c) Sodium chloride
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d) Oleic acid
Explanation
Answer: (b)
Q.14
From an aqueous solution of zinc sulphate, normal zinc carbonate may be precipitated by …
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a) Passing CO2
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b) Warming with NaHCO3
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c) Adding Na2CO3
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d) Boiling with CaCO3
Explanation
Answer: (b)
Q.15
A solution when diluted with H2O and boiled gives a white ppt. On addition of excess NH4Cl/NH4OH, the volume of precipitate decreases due to dissolution leaving behind a white gelatinous precipitate. The precipitate which dissolves in NH4OH/ NH4Cl is …[ IIT 2006]
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a) Zn(OH)2
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b) Al(OH)2
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c) Mg(OH)2
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d) Ca(OH)2
Explanation
Answer: (a)
Q.16
Which of following is proper reason for stability of Gd3+ ion. (Tamilnadu-CET-2002)
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a) 4f orbital is completely filled
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b) 4f orbital is half filled
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c) show electronic configuration similar to inert gas.
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d) 4f orbital is completely vacant
Explanation
Answer: (b)
Q.17
The lanthanide contraction is responsible for the fact that ..[ AIPMT 1997]
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a) Zr and Yt have about the same radius
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b) Zr and Nb have similar oxidation states
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c) Zr and Hf have about the same radius
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d) Zr and Zn have the same oxidation state
Explanation
Answer: (c)
Q.18
Which of the following statements is not correct?
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a) La(OH)2, iis less basic than Lu(OH)3
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b) In lanthanoid series, ionic radius of Ln+3 ions decreases
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c) La is actually an element of transition series rather than lanthanoid series
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d) Atomic radii of Zr and Hf are same because of lanthanoid contraction
Explanation
Answer: (a)
Q.19
The colour of zinc sulphide is
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a) Yellow
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b) White
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c) Brown
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d) Black
Explanation
Answer: (b)
Q.20
K2Cr2O7 on heating with aqueous NaOH gives …[ AIPMT 1997]
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a) CrO42-
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b) Cr(OH)3
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c) Cr2O72-
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d) Cr(OH)2
Explanation
Answer: (a)
Q.21
Among the following, the compound that is both paramagnetic and cooloured is …. [ IIT 1997]
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a) K2Cr2O7
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b) (NH4)2[TiCl6]
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c) VOSO4
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d) K3[Cu(CN)4]
Explanation
Answer: (c)
Q.22
Which statement is incorrect?
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a) Iron belongs to 3d-transitiion series of periodic table
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b) Iron belongs to f-block of the periodic table
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c) Iron belongs to first transition series
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d) Iron belongs to group VIII of the periodic table
Explanation
Answer: (b)
Q.23
In the silver plating of copper K[Ag(CN)2] is used instead of AgNO3 The reason is [ AIPMT 2002]
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a) A thin layer of Ag is formed on Cu
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b) More voltahe is required
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c) Ag+ ions are completely removed from solution
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d) Less availability of Ag+ ion as Cu can not displace Ag from [Ag(CN)2]- ion
Explanation
Answer: (d)
Q.24
Lanthanoides elements are separated on the basis of their ... ..
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a) chemical properties
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b) difference in basicity
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c) physical properties
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d) difference in acidity
Explanation
Answer: (b)
Q.25
Which of the following compounds is expected to be coloured? [ IIT 1997]
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a) Ag2SO4
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b) CuF2
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c) MgF2
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d) CuCl
Explanation
Answer: (b)
Q.26
he colour of Mohr’s salt, (NH4)2SO4Fe(SO4) . 6H2O is
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a) White
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b) Green
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c) Violet
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d) Blue
Explanation
Answer: (b)
Q.27
When (NH4) 2 Cr2O7 Is heated, the gas evolved is …[ AIPMT 1994]
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a) N2
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b) NO2
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c) O2
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d) N2 O
Explanation
Answer: (a)
Q.28
Zn and Cd do noot show variable valency, because ... ..
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a) they have only two electronns in outermost sunshells
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b) their d-subshells are complete
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c) their d-subshells are incomplete
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d) they are relatively hard metals
Explanation
Answer: (b)
Q.29
When excess of SnCl2 is added to a solution of HgCl2, a white ppt. turning to grey is obtained. This grey colour is due to the formation of …[PET MP 19990]
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a) Hg2Cl2
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b) SnCl4
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c) Sn
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d) Hg2
Explanation
Answer: (d)
Q.30
Which set represents an example of non-typical transition elements?
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a) Zn, Cd, Hg
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b) Sc, Ti, V
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c) Cu, Ag, Au
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d) Cr, Fe, Mn
Explanation
Answer: (a)
0 h : 0 m : 1 s
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