NEET Chemistry MCQ - D- And F- Block Elements Mcq Neet Chemistry - Quiz-3 Solution

Q.1.

The common oxidation states of Ti are …[ AIPMT 1994]

11%
a) +2, +3
58%
b) +3, +4
11%
c) 3, -4
21%
d) +2, +3, +4

Explanation

Q.2.

Bell-metal is an alloy of …[ AIPMT 1999]

0%
a) Cu + Pb
42%
b) Cu + Sn
25%
c) Cu + Zn
33%
d) Cu + Ni

Explanation

Q.3.

Match column-A and B

Column-A	Column-B
V⁴⁺	a. colourless
Ti³⁺	b. pink
Ti⁴⁺	c. purple
Mn²⁺	d. blue
-- --	e. vilot

13%
a) 1 → d; 2 → c; 3 → a; 4 → e
33%
b) 1 → d; 2 → c; 3 → a; 4 → b
27%
c) 1 → d; 2 → e; 3 → a; 4 → b
27%
d) 1 → e; 2 → c; 3 → b; 4 → a

Explanation

Q.4.

The metal present in insulin is …[ CET Kurukshetra 1992]

0%
a) Cu
23%
b) Fe
38%
c) Zn
38%
d) Mg

Explanation

Q.5.

Zinc, cadmium and mercury are ..

85%
a) d-block elements
0%
b) p-block elements
8%
c) s-block elements
8%
d) f-block elements

Explanation

Q.6.

Which of the following statements(s) is/are correct with reference to the ferrous and ferric ions? [ IIT 1998]

8%
a) Fe3+ gives brown colour with potassium ferricyanide
38%
b) Fe3+ gives blue precipitate with potassium ferricyanide
8%
c) Fe3+ gives red colour with potassium ferricyanide
46%
d) All of the above

Explanation

Q.7.

Which of the following arrangements does nt represent the correct order of the property stated against it ? …[ JEE 2013]

29%
a) Co3+ < Fe3+ < Cr3+ < Sc3+ : Stability in aqueous solution
14%
b) Sc < Ti < Cr < Mn : number of oxidation states
50%
c) V2+ < Cr2+ < Mn2+ < Fe2+ : paramagnetic behavior
7%
d) Ni2+ < Co2+ < Fe2+ < Mn2+ : iionic size

Explanation

Q.8.

Platinum, palladium, iridium, etc,. are called noble metals because..

8%
a) Alfred Nobel discovered them
75%
b) They are inert towards many common reagents
8%
c) They are shining, lustrous and pleasing to look
8%
d) They are found in native state

Explanation

Q.9.

Cuprous compounds such as CuCl, CUCN and CuSCN are the only salts stable in H2O due to …[ AIMPT 1996]

33%
a) High hydration energy of Cu+ ions
33%
b) Their inherent tendency not to disproportionate
17%
c) Diamagnetic nature
17%
d) Insolubility in water

Explanation

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

50%
a) Assertion and Reason both are correct and Reason is correct explanation to Assertion
25%
b) Assertion and Reason both are correct and Reason is not correct explanation to Assertion
17%
c) Assertion is correct but reason is wrong
8%
d) Assertion is wrong but reason is correct

Explanation

Q.11.

The lanthanoids contraction is responsible for the fact that …[ AIEEEE 2005]

7%
a) Zr and Y have about the same radius
21%
b) Zr and Nb have similar oxidation state
57%
c) Zr and Hf have about the same radius
14%
d) Zr and Zn have the same oxidation state

Explanation

Q.12.

Which of Lanthanide compound is used in pigment ? (Gujarat-2009)

9%
a) Tb(OH)3
18%
b) Lu(OH)3
55%
c) Ce(OH)3
18%
d) CeO2

Explanation

Q.13.

Photographic plates and films have an essential ingredient of …[ AIPMT 1989]

17%
a) Silver nitrate
33%
b) Silver bromide
33%
c) Sodium chloride
17%
d) Oleic acid

Explanation

Q.14.

From an aqueous solution of zinc sulphate, normal zinc carbonate may be precipitated by …

0%
a) Passing CO2
30%
b) Warming with NaHCO3
60%
c) Adding Na2CO3
10%
d) Boiling with CaCO3

Explanation

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]

62%
a) Zn(OH)2
12%
b) Al(OH)2
12%
c) Mg(OH)2
12%
d) Ca(OH)2

Explanation

Q.16.

Which of following is proper reason for stability of Gd3+ ion. (Tamilnadu-CET-2002)

10%
a) 4f orbital is completely filled
40%
b) 4f orbital is half filled
40%
c) show electronic configuration similar to inert gas.
10%
d) 4f orbital is completely vacant

Explanation

Q.17.

The lanthanide contraction is responsible for the fact that ..[ AIPMT 1997]

0%
a) Zr and Yt have about the same radius
10%
b) Zr and Nb have similar oxidation states
80%
c) Zr and Hf have about the same radius
10%
d) Zr and Zn have the same oxidation state

Explanation

Q.18.

Which of the following statements is not correct?

33%
a) La(OH)2, iis less basic than Lu(OH)3
17%
b) In lanthanoid series, ionic radius of Ln+3 ions decreases
33%
c) La is actually an element of transition series rather than lanthanoid series
17%
d) Atomic radii of Zr and Hf are same because of lanthanoid contraction

Explanation

Q.19.

The colour of zinc sulphide is

22%
a) Yellow
33%
b) White
33%
c) Brown
11%
d) Black

Explanation

Q.20.

K2Cr2O7 on heating with aqueous NaOH gives …[ AIPMT 1997]

40%
a) CrO42-
20%
b) Cr(OH)3
30%
c) Cr2O72-
10%
d) Cr(OH)2

Explanation

Q.21.

Among the following, the compound that is both paramagnetic and cooloured is …. [ IIT 1997]

50%
a) K2Cr2O7
0%
b) (NH4)2[TiCl6]
38%
c) VOSO4
12%
d) K3[Cu(CN)4]

Explanation

Q.22.

Which statement is incorrect?

25%
a) Iron belongs to 3d-transitiion series of periodic table
50%
b) Iron belongs to f-block of the periodic table
17%
c) Iron belongs to first transition series
8%
d) Iron belongs to group VIII of the periodic table

Explanation

Q.23.

In the silver plating of copper K[Ag(CN)2] is used instead of AgNO3 The reason is [ AIPMT 2002]

0%
a) A thin layer of Ag is formed on Cu
20%
b) More voltahe is required
50%
c) Ag+ ions are completely removed from solution
30%
d) Less availability of Ag+ ion as Cu can not displace Ag from [Ag(CN)2]- ion

Explanation

Q.24.

Lanthanoides elements are separated on the basis of their ... ..

42%
a) chemical properties
33%
b) difference in basicity
25%
c) physical properties
0%
d) difference in acidity

Explanation

Q.25.

Which of the following compounds is expected to be coloured? [ IIT 1997]

44%
a) Ag2SO4
22%
b) CuF2
33%
c) MgF2
0%
d) CuCl

Explanation

Q.26.

he colour of Mohr’s salt, (NH4)2SO4Fe(SO4) . 6H2O is

11%
a) White
22%
b) Green
44%
c) Violet
22%
d) Blue

Explanation

Q.27.

When (NH4) 2 Cr2O7 Is heated, the gas evolved is …[ AIPMT 1994]

20%
a) N2
30%
b) NO2
40%
c) O2
10%
d) N2 O

Explanation

Q.28.

Zn and Cd do noot show variable valency, because ... ..

18%
a) they have only two electronns in outermost sunshells
73%
b) their d-subshells are complete
0%
c) their d-subshells are incomplete
9%
d) they are relatively hard metals

Explanation

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]

20%
a) Hg2Cl2
10%
b) SnCl4
40%
c) Sn
30%
d) Hg2

Explanation

Q.30.

Which set represents an example of non-typical transition elements?

80%
a) Zn, Cd, Hg
0%
b) Sc, Ti, V
10%
c) Cu, Ag, Au
10%
d) Cr, Fe, Mn

Explanation

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