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NEET Chemistry MCQ
D- And F- Block Elements Mcq Neet Chemistry
Quiz 7
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Q.1
Oxidation state of Hg in alagam is ... ..
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a) zero
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b) one
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c) two
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d) three
Explanation
Answer: (a)
Q.2
Magnetic moment 2.84 BM is given by (At.No Ni =Ti=22, Cr=24, Co=27) .. [ AIPMT 2014]
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a) Ni2+
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b) Ti3+
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c) Cr3+
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d) Co2+
Explanation
Answer: (a)
Q.3
Lanthanoids and actinoids resembles in ... ..
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a) electronic configuration
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b) oxidation state
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c) ioonisation energy
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d) formation of complex
Explanation
Answer: (a)
Q.4
Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in presence of …[ IIT 2008]
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a) Nitrogen
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b) Oxygen
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c) CO2
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d) Ar
Explanation
Answer: (b)
Q.5
Which of the following does not represent the correct order of the properties indicated? [ AIMPT 1997]
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a) Ni2+ > Cr2+ > Fe2+ > Mn2+ (size)
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b) Sc > Ti > Cr > Mn (size)
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c) Mn2+ > Ni 2+ Co2+ > Fe 2+ ( unpaired electron)
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d) Fe2+ > Co 2+ > Ni 2+ > u2+ ( unpaired electron)
Explanation
Answer: (a)
Q.6
Which statement about Hg is correct?
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a) Hg is the only liquid metal
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b) Hg2+ salts are more stable than Hg22+ salts
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c) Hg forms no amalgam with iron and platinum
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d) All of the above
Explanation
Answer: (d)
Q.7
Ammonium dichromate is used in some fire works. The green coloured powder blown in air is … [ IIT 1997]
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a) CrO
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b) Cr2O3
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c) Cr
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d) CrO(O)2
Explanation
Answer: (b)
Q.8
The general electronic configuration of transition elements is ... ..
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a) (n-1) d1-5
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b) (n-1) d1-10 ns1
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c) (n-1) d1-10 ns0-2
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d) noe of these
Explanation
Answer: (c)
Q.9
Assertion: To a solution of potassium chromate if a strong acid is added it changes its colour from yellow to orange. Reason: The colour changes due to the oxidation of potassium chromate
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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.10
The formula of mercurous ion is
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a) Hg+
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b) Hg2+
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c) Hg22+
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d) None of these
Explanation
Answer: (c)
Q.11
A compound of metal ion Mx+ (Z= 24) has a spin only meagetic moment of √15 Bohr Magnetons. The number of unpaired electrons in the compound are ... ..
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a) 2
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b) 4
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c) 5
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d) 3
Explanation
Answer: (d)
Q.12
When copper is heated with conc. HNO3 it produces … [ NEET 2016 ]
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a) Cu(NO3)2 and NO
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b) Cu(NO3)2, NO and NO2
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c) Cu(NO3)2 and N2O
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d) Cu(NO3)2, and NO
Explanation
Answer: (d)
Q.13
Platinum metal can be dissolved in ..
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a) Hot concentrated hydrochloric acid
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b) Hot concentrated nitric aciss
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c) Hot dilute sulphuric acid
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d) A mixture of hydrochloric and nitric acids
Explanation
Answer: (d)
Q.14
Which of the following may be considered to be an organometallic compound? [ AIMPMT 1996]
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a) Nickel tetracarbonyl
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b) Chlorophyll
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c) K3[Fe(C2O4)3]
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d) [Co(en)3]Cl3
Explanation
Answer: (b)
Q.15
The pair of metals which can dissolves iin NaOH(aq) is
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a) Al, Cu
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b) Zn, Cd
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c) Pb, Sn
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d) Zn, Al
Explanation
Answer: (d)
Q.16
An aqueous solution of FeSO4, Al2(SO4)3 And chrome alum is heated with excess of Na2O2 and filtered. The material obtained are … [ IIT 1996]
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a) A colourless filtrate and a green residue
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b) A yellow filtrate and a green residue
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c) A yellow filtrate and a brown residue
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d) A green filtrate and a brown residue
Explanation
Answer: (c)
Q.17
What is the equivalent weight of KMnO4 when it is converted in MnSO4?
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a) M/6
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b) M/2
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c) M/5
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d) M/3
Explanation
Answer: (c)
Q.18
In haemoglobin the iron shows oxidation state …[ KCET 1991]
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a) +2
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b) +3
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c) +1
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d) +4
Explanation
Answer: (b)
Q.19
Which of the following is a lanthanoid?
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a) Ta
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b) Rh
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c) Th
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d) Lu
Explanation
Answer: (d)
Q.20
The correct order of ionic radii of Y3+ , La3+, Eu3+, and Lu3+ is :
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a) Y3+ < La3+ < Eu3+ < Lu3+
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b) Y3+ < Lu3+ < Eu3+ < La3+
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c) Lu3+ < Eu3+ < La3+ < Y3+
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d) La3+ < Eu3+ < Lu3+ < Y3+
Explanation
Answer: (b)
Q.21
Gadolinium belong to 4f series. Its atomic number isWhich of the following is the correct electron configuration of gadolinium? [ AIMPT 2015]
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a) [Xe] 4f8 6d2
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b) [Xe] 4f9 5s1
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c) [Xe] 4f7 5d1 6s2
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d) [Xe] 4f6 5d2 6s2
Explanation
Answer: (c)
Q.22
Which is not true? HgCl2 reacts with NH3(g) to give [Hg(NH3)4]Cl2
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a) ZnS is white solid which turns yellow on exposure to light
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b) ZnS is precipitated on passing H22ZnO2
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c) Basic zinc carbonate is ZnCO3. 3Zn(OH)2
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d)
Explanation
Answer: (d)
Q.23
The highest magnetic mment for transition metals exists for
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a) 3d9
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b) 3d7
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c) 3d5
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d) 3d3
Explanation
Answer: (c)
Q.24
Black HgS dissolves in ...
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a) conc. HCl on boiling
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b) boiling HCl + a crystal of KClO3
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c) NaOH
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d) All of these
Explanation
Answer: (b)
Q.25
A transition element X has a configuration [ Ar]3d4 in its +3 oxidation state. Its atomic number is
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a) 25
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b) 26
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c) 22
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d) 19
Explanation
Answer: (a)
Q.26
Identify the alloy containing a non-metal as a constituent in it … [ AIPMT 2012]
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a) Invar
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b) Steel
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c) Bell-metal
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d) Bronze
Explanation
Answer: (b)
Q.27
The impurity of sulphure makes the iron
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a) Fibrous
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b) Red short
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c) Cold short
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d) Malleable
Explanation
Answer: (b)
Q.28
By passing H2S gas in acidified KMnO4 solution, we get [ AIPMT 1995]
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a) S
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b) K2S
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c) MnO2
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d) K2SO3
Explanation
Answer: (a)
Q.29
“Mercury” tree can be prepared
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a) By mixing uo mercuric thiocyanate and gum
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b) By adding Nessle’s reagent to ammonium salt solution
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c) By pouring little mercury into AgNO3 solution
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d) By heating mercuric chloride
Explanation
Answer: (c)
Q.30
Ferrous sulphate on heating gives …[ Roorkee 1998]
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a) SO3
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b) SO2
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c) Fe2O3
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d) All of these
Explanation
Answer: (d)
0 h : 0 m : 1 s
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