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NEET Chemistry MCQ
D- And F- Block Elements Mcq Neet Chemistry
Quiz 2
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Q.1
Lanthanides are …[ AIMPT 2004]
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a) 14 elements in the sixth period ( at.no. = 90 to 103) that are filling 4f sub-level
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b) 14 elements in the seventh period ( At.no=90 to 103) that are filling 5f sub-level
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c) 14 elements in the sixth period ( At. No =58 to 71) that are filling 4f sub-level
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d) 14 elements in the seventh period ( At. No = 58 to 71) that are filling 4f sub-level
Explanation
Answer: (c)
Q.2
Automobile engine blocks are made up of ... ..
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a) Stainless steel
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b) Nickel-chromium steel
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c) Cast iron
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d) Wrought iron
Explanation
Answer: (c)
Q.3
For making good quality mirrors, plates of float glasses are used. These are obtained by floating molten glass over a liquid metal which does not solidify before glass. The metal can be…[ AIEEE 2003]
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a) Na
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b) Mg
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c) Hg
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d) Sn
Explanation
Answer: (c)
Q.4
Which one of the following does not decolourise an acidified KMnO4 solution? [ Roorkee 1990]
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a) SO2
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b) FeCl2
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c) H2O2
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d) FeSO4
Explanation
Answer: (b)
Q.5
The main reason for large number of oxidation state exhibited by the actinoids than the corresponding lathanoids is ...
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a) more energy difference between 5f and 6d-orbitals than between 4f and 5d-orbitals
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b) lesser energy difference between 5f and 6d-orbitals than between 4f and 5d-orbitaks
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c) large atomic size of actinoids than the lanthanoids
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d) greater reactive nature of the actinoids than the lanthanoids
Explanation
Answer: (b)
Q.6
Which one of the following ions is the most stable in aqueous solution? (At. No, Ti=22, V=23, Cr=24, Mn=25)[ AIMPT2007]
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a) Cr3+
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b) V3+
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c) Ti3+
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d) Mn3+
Explanation
Answer: (d)
Q.7
Zn gives H2 gas with H2SO4 and HCl but not with HNO3 because
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a) Zn acts as an oxidising agent when react with HNO3
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b) HNO3 is weaker acid than H2SO4
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c) iin electrochemical series Zn is above hydrogen
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d) NO3- ion is reduced in perference to hydronium ion
Explanation
Answer: (d)
Q.8
Which alloy contains Cu and Zn? ..[ IIT 1993]
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a) Bronze
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b) Solder
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c) Gun metal
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d) Type metal
Explanation
Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (such as aluminium, manganese, nickel or zinc) and sometimes non-metals or metalloids such as arsenic, phosphorus or silicon. Solder alloy is made up of different combinations. most popular is 60% tin, 39% lead, and 1% other metals like silver, cadmium and copper. gunmetal is composed of 88 percent copper, 10 percent tin, and 2 percent zinc, Type metal is an alloy of lead, tin and antimony. Bronze refers to any alloy of copper and tin. Admiralty gunmetal is 88 % copper, 10% tin and 2% zinc so it is a specific type of bronze. So correct answer is gun metal Answer: (c)
Q.9
Which of following radioactive elements in Lanthanodies.
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a) Promethium (Pm)
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b) Lutetium (Lu)
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c) Yetterbium (Yb)
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d) Samarium (Sm)
Explanation
Answer: (a)
Q.10
General electronic configuration of lanthanides are [ AIPMT 2002]
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a) (n-2)f1-14(n-1)s2p6d0-1ns2
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b) (n-2)f10-14(n-1) d0-1ns2
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c) (n-2)f0-14(n-1) d10ns2
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d) (n-2) d0-1 (n-1)f1-14 ns2
Explanation
Answer: (a)
Q.11
Lanthanoids and actinoids resembles in .... ..
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a) electronic configuration
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b) oxidation state
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c) ionisation energy
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d) formation of complex
Explanation
Answer: (a)
Q.12
Zinc cannot displace the following ions from their aqueous solutions: [ Roorkee 1994]
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a) Ag+
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b) Cu2+
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c) Fe2+
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d) Na+
Explanation
Answer: (d)
Q.13
Which one of the following elements shows maximum number of different oxidation states in its compounds? [ AIPMT 1998]
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a) Eu
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b) La
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c) Gd
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d) Am
Explanation
Answer: (d)
Q.14
Colour in transition metal compounds is attrbuted to ... ..
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a) small sized metal ions
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b) absorption of light in the UV region
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c) complete ns-subshell
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d) d-d transition
Explanation
Answer: (d)
Q.15
Which does not give a precipitate with excess of NaOH? [ KCET 1997]
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a) HgCl2
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b) HgNO3
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c) FeSO4
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d) ZnSO4
Explanation
Answer: (d)
Q.16
Platinum black is ...
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a) platinum metal mixed with CoO2
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b) reduction of platinum tetrachloride with glucose
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c) platinum metal coated with black colour
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d) all of the above
Explanation
Answer: (b)
Q.17
Stainless steel contains iron and …[ AIPMT 1995]
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a) Cr + Ni
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b) Cr + Zn
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c) Zn + Pb
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d) Fe + Cr + Ni
Explanation
Answer: (a)
Q.18
A hard and resistant alloy generally used in tip of nib of pen is ... ..
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a) Os, Ir
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b) Pt, Cr
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c) V, Fe
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d) Fe, Cr
Explanation
Answer: (b)
Q.19
Addition of high proportions of manganese makes steel useful in making rails of rail orads becuaaaase manganese
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a) Gives hardness to steel and can remove oxygen and sulphure
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b) Helps the formation of oxides of iron
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c) Can show highest oxidation state of +7
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d) None of the above
Explanation
Answer: (a)
Q.20
Which of the following elements have some atomic radii ?
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a) Mn, Fe, Co, Cu
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b) Cr, Mn, Fe, Cu
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c) Cr, Mn, Fe, Co
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d) Mn, Fe, Cu, Ni
Explanation
Answer: (b)
Q.21
When CuSO4 is electrolysed using platinum electrodes? [ AIPMT 1993]
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a) Copper is liberated at cathode, sulphur at anode
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b) Copper is liberated at cathode, oxygen at anode
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c) Sulphur is liberated at cathode, oxygen at anode
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d) Oxygen is liberated at cathode, copper at anode
Explanation
Answer: (b)
Q.22
Which of the following statements about the interstitial compounds is incorrect?
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a) They are chemically reactive
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b) They are much harder than the pure metal
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c) They have higher melting points than the pure metal
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d) They retain metallic conductivity
Explanation
Answer: (a)
Q.23
Knowing that the chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements is incorrect? [ AIEEE 2009]
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a) The ionic size of Ln(III) decreases in general with increasing atomic number
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b) Ln(III) compounds are generally colourless
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c) Ln(III) hydroxides are mainly basic in character
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d) Because of the large size of the Ln(III) ions the bonding in its compounds is predominantly ionic in character
Explanation
Answer: (b)
Q.24
Which of the following does not relevant with transition elements ?
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a) Melting points of transition elements are high.
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b) Some ions of transition elements possesses paramagetic properties.
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c) All transition elements dissolves in acid.
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d) Transition elements processes various oxidation state.
Explanation
Answer: (c)
Q.25
Elements of group 11 and 12 are …
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a) Normal elements
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b) transition elements
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c) Alkaline earth metals
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d) Alkali metals
Explanation
Answer: (b)
Q.26
Auric chloride on reaction with ferrous sulphate changes to … [ Roorkee 1993]
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a) Au
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b) AuCl
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c) Au2SO4
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d) Au3(SO4)2
Explanation
Answer: (a)
Q.27
Which one of the following forms a colourless solution in aqueous medium? ( At.no Sc=21, Ti = 22, V=23, Cr=24)
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a) V3+
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b) Cr3+
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c) Ti3+
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d) Sc3+
Explanation
Answer: (d)
Q.28
In the reaction 3Zn + 2NH3 → X + 3HWhat is X ?
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a) N2ZnO2
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b) Zn (NO3)2
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c) N2ZnO4
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d) Zn3N2
Explanation
Answer: (d)
Q.29
Copper sulphate dissolves in excess of KCN to give …[ AIPMT 2006]
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a) CuCN
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b) [Cu(CN)4]3-
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c) [Cu(CN)4]2-
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d) Cu(CN)2
Explanation
Answer: (b)
Q.30
The metal that does not displace hydrogen from an acid is
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a) Hg
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b) Zn
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c) Al
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d) Ca
Explanation
Answer: (a)
0 h : 0 m : 1 s
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