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NEET Chemistry MCQ
D- And F- Block Elements Mcq Neet Chemistry
Quiz 5
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Q.1
The colour of solution obtained by adding excess of KI in the solution of HgCl is …[ PET 1990]
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a) Organce
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b) Brown
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c) Red
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d) Colourless
Explanation
Answer: (d)
Q.2
Permanent magnets are generally made of alloys of ... ..
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a) Co
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b) Zn
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c) Sb
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d) Pb
Explanation
Answer: (a)
Q.3
In the metallurgy of iron, when limestone is added to the blast furnace, the calcium ion ends up as … [ KCET 1993]
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a) Slag
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b) gangue
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c) metallic calcium
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d) Calcium carbonate
Explanation
Answer: (a)
Q.4
The inner transition elements are the elements in which the added electrons go to
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a) (n-1) d-orbitals
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b) (n-2) f-orbitals
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c) (n-1) d-orbitals and (n-1) f-orbitals
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d) (n-1) d-orbitals and ns-orbitals
Explanation
Answer: (b)
Q.5
The formula of haematite is … [ MLNR 1994]
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a) Fe3O4
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b) Fe2O3
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c) FeCO3
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d) FeS2
Explanation
Answer: (b)
Q.6
Cerium (Z=58) is an important member of the lanthanoids. Which of the following statements about it is correct? [ AIEEE 2004]
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a) Ce(IV) acts as an oxidant
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b) The +3 oxidation state of Ce is more stable than +4 oxidation state
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c) The +4 oxidation state of Ce is not known in solution state
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d) The common oxidation states of Ce are +3 and +4
Explanation
Answer: (c)
Q.7
In comparison to ferrous salts, ferric salts are…
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a) More stable
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b) Less stable
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c) Equally stable
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d) None of these
Explanation
Answer: (a)
Q.8
Which of the following statements is not correct? [ AIPMT 2001]
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a) La(OH)3 is less basic then Li(OH)3
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b) In lathanide series, ionic radius of Ln3+ decreases.
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c) La is actually an element of transition series rather lanthanide
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d) Atomic radius of Zr and Hf are same because of lanthanide contraction
Explanation
Answer: (a)
Q.9
From sodium argentocyanide Na[Ag(CN)2], silver is precipitated by adding a powder of ..
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a) Tin
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b) Zinc
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c) Mercury
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d) Calcium
Explanation
Answer: (b)
Q.10
When a substance A react with water it produces a combustible gas B and a solution of substance C in water. When another substance D reacts wiiith this solution C, it also produce the same gas B on worming but D can also produce gas B on reaction with dilute sulphuric acid at room temperature, A imparts a deep golden yellow colour to a smokeless flame of Bunsen burner. A, B, C and D respectively are ..[ AIPMT 1998]
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a) Na, H2, NaOH, Zn
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b) K, H2, KOH, Al
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c) CaH2, Ca(OH)2, Sn
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d) CaC2, C2H2, Ca(OH)2, Fe
Explanation
Answer: (a)
Q.11
Which of ion can not show d-d transition ? (Gujarat-2007)
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a) Ti4+
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b) Cr3+
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c) Mn2+
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d) Cu2+
Explanation
Answer: (a)
Q.12
Iron is obtained on large scale from haematite ( Fe2O3) …[ IIT 2000]
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a) By reduction
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b) By oxidation
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c) By reduction followed by oxidation
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d) By oxidation followed by reduction
Explanation
Answer: (b)
Q.13
Group 11 and IB elements are commonly known as ..
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a) Coinage metals
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b) Transition metals
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c) Typical elements
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d) Representative elements
Explanation
Answer: (a)
Q.14
From a solution of CuSO4, the metal used to recover copper is …[ PET 1992]
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a) Na
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b) Ag
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c) Hg
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d) Fe
Explanation
Answer: (d)
Q.15
HgCl2 and I2 both when dissolved in water containing I- ions the pair of species formed is
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a) HgI2, I3-
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b) HgI2, I-
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c) HgI42-, I3-
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d) Hg2I2, I-
Explanation
Answer: (c)
Q.16
Which of the following is correct?
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a) Calomel is mercuric chloride
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b) Calomel is widely used as an antiseptic
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c) Calomel is used medically as purgative
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d) Calomel is freely soluble in water
Explanation
Answer: (c)
Q.17
Which compound does bot dissolve in hot, dil HNO3 ? [ IIT 1996]
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a) HgS
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b) PbS
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c) CuS
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d) CdS
Explanation
Answer: (a)
Q.18
Which match is incorrect?
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a) Ammonia soda process – manufacture of potassium carbonate
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b) Bessemer process – manufacture of steel
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c) Mac arther and Forest process – extraction of silver
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d) Dow’s process – manufacture of phenol
Explanation
Answer: (a)
Q.19
Anhydrous CuCl2 and CuBr2 exist as ..[ CET Punjab 94]
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a) Monomer
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b) Dimer
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c) Trimer
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d) Polymer
Explanation
Answer: (d)
Q.20
Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy?
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a) Vanadium (Z=23)
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b) Chromium (Z=24)
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c) Iron (Z=26)
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d) Manganese (Z=25)
Explanation
Answer: (d)
Q.21
Which of the following factors may be regarded s the main cause for lanthanoid contraction? [ AIEEE 2005]
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a) Poor shielding of one of 4f-electrons by another in the subshell
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b) Effective shielding of one of 4f-electron by another in the subshell
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c) Poor shielding of 5d-electrons by 4f-electrons
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d) Poor shielding of 4f-electrons by 5d-electrons
Explanation
Answer: (a)
Q.22
The 3d-transition series contains elements from atomic number ... ..
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a) 22 to 30
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b) 21 to 30
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c) 21 to 31
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d) 21 to 29
Explanation
Answer: (b)
Q.23
Which of the following lanthanoid ions is diamagnetic? [At.no Ce=58, Sm=62, Eu=63, Yb=70][ NEET 2013]
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a) Ce2+
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b) Sm2+
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c) Eu2+
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d) Yb2+
Explanation
Answer: (d)
Q.24
Percentage of gold in 21.6 carat gold is
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a) 21.6
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b) 90
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c) 10
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d) 70
Explanation
Answer: (b)
Q.25
Schweitzer’s reagent used for dissolving cellulose in the manufacture of artificial silk is … [ Roorkee 1999]
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a) CuSO4. 5H2O
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b) CuI
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c) Cu(NH3)4SO4
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d) Cu(CH3COO)2 . Cu(OH)2
Explanation
Answer: (c)
Q.26
Which compound is used as a purgative in medicine?
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a) HgCl2
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b) Hg2Cl2
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c) CuCl
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d) CuCl2
Explanation
Answer: (b)
Q.27
Chemical name of corrosive sublimate is …[ Roorkee 1992]
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a) Mercurous chloride
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b) Zinc chloride
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c) Mercuric chloride
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d) Aluminium chloride
Explanation
Answer: (c)
Q.28
Chromium has most stable oxidation state of ... ..
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a) +5
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b) +3
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c) +2
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d) +4
Explanation
Answer: (b)
Q.29
Anhydrous ferric chloride is prepared by … [ IIT 2002]
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a) Heating hydrated ferric chloride at a high temperature in a steam of air
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b) Heating metallic iron in a stream of dry chlorine gas
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c) Reaction of ferric oxide with hydrochloric acid
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d) Reaction of metallic iron with hydrochloric acid
Explanation
Answer: (b)
Q.30
Actinides … [ AIPMT 1994]
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a) Are all synthetic elements
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b) Include element 104
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c) Have any short lived isotopes
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d) Have variable valency
Explanation
Answer: (d)
0 h : 0 m : 1 s
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