NEETDPPs

-by Nitesh Devnani-

 1. When hydrogen peroxide is added to acidified potassium dichromate, a blue colour is produced due to
formation of
2−
a) CrO3 b) Cr2O3 c) CrO5 d) CrO4
2. In the extraction of Ag, Ag2S is dissolved in:
a) HCl b) HNO3 c) KCN d) H2SO4
3. The meniscus of mercury in a glass tube is:
a) Convex upwards b) Concave c) Plane d) Convex inwards
4. The iron obtained from the blast furnace is called:
a) Pig iron b) Cast iron c) Wrought iron d) Steel
5. Which one of the following has strongest metallic bonding?
a) Fe b) Sc c) V d) Cr
6. The alloy which contains nickel is:
a) Brass b) Bell metal c) Bronze d) German silver
7. A hard and resistant alloy generally used in tip of nib of pen is:
a) Os, Ir b) Pt, Cr c) V, Fe d) Fe, Cr
8. The extraction of which of the following metals involves bessemerization?
a) Fe b) Ag c) Al d) Cu
9. CuCl absorbs
a) CO2 b) SO2 c) H2SO4 d) CO
10. CrO3 dissolves in aqueous NaOH to give
2− − 2−
a) CrO4 b) Cr(OH) 3 c) CrO7 d) Cr(OH)2
11. One of the following metals is obtained by leaching its ore with dilute cyanide solution. Identify it.
a) Titanium b) Vanadium c) Silver d) Zinc
12. German silver alloy contains
a) Zinc, silver and copper b) Nickel ,silver and copper
c) Germanium ,silver and copper d) Zinc, nickel and copper
13. Copper metal of high purity is obtained by:
a) Carbon reduction b) Hydrogen reduction c) Electrolytic method d) Thermite process
14. The solubility of silver bromide in hypo solution is due to the formation of :
a) Ag2SO3 b) Ag2S2O3 c) [Ag(S2O3)] d) [Ag(S2O3)2]3
15. Which of the following is a ferrous alloy?
a) Invar b) Solder c) Magnalium d) Type metal
16. Consider the following statements.
(I) La(OH)3 is the least basic among hydroxides of lanthanides
(II) Zr4+ and Hf 4+ possess almost the same ionic radii
(III) Ce4+ can act as an oxidizing agent
Which of the above is/are true?
a) (I) and (III) b) (II) and (III) c) (II) only d) (I) only
17. Iodide of Millon’s base is:

a) K2[Hgl4] b) c) [Hg2O. NH2OH]. H2O d) Hg(NH2)I + Hg

18. The alloy of steel that is used for making automobile parts and utensils is:
a) Stainless steel b) Nickel steel c) Tungsten steel d) Chromium steel
19. Which is used as substitute for platinum in jewellery?
a) Rolled gold b) White gold c) Purple of Cassius d) Faraday’s gold
20. The highest oxidation state exhibited by transition metals is
a) +7 b) +8 c) +6 d) +5
21. Cl2 + HgO ⟶?
a) Cl2O + HgCl b) Cl2O + HgCl2 c) ClO + HgCl d) ClO + HgCl2
22. The following two reactions HNO3 with Zn are given as (equations are not balanced) Zn + conc. HNO3 ⟶
 Zn(NO3)2 + 𝑋 + H2O(𝐴)
Zn + dil . HNO3 ⟶ Zn(NO3)2 + 𝑌 + H2O(𝐵)
In reactions 𝐴 and 𝐵, the compounds 𝑋 and 𝑌 respectively, are
a) NO2 and NO b) NO2and NO2 c) NO and NO2 d) NO2 and NH4NO3
23. Which of the following electronic configurations belong to transition elements?
a) KL 3𝑠2𝑝6𝑑5, 4𝑠1
b) KL 3𝑠2𝑝6𝑑10, 4𝑠2 𝑝3
c) KL 3𝑠2𝑝6𝑑10, 4𝑠24𝑝1
d) KLM 4𝑠2𝑝6𝑑10, 5𝑠25𝑝1
24. The magnetic moment of a transition metal ion is √15 BM. Therefore, the number of unpaired electrons
present in it, is
a) 3 b) 4 c) 1 d) 2
25. Which is not true in case of transition metals?
a) They are malleable and ductile
b) They have high melting and boiling points
c) They crystallise with body centred cubic and hexagonal close packed structure only
d) They show variable oxidation states although not always
26. Formation of coloured solution is possible when metal ion in the compound contains
a) Paired electrons b) Lone pair of electrons
c) Unpaired electrons d) None of these
27. Carbon in wrought iron is present as
a) Silicon carbide b) Iron carbide
c) Graphite d) Partly iron carbide and partly as graphite
28. An element is in 𝑀 form. Its electronic configuration is [Ar]3𝑑1, the ion is
3+

a) Ca2+ b) Sc+ c) Ti4+ d) Ti3+

29. Each transition series contains:
a) 12 elements b) 10 elements c) 14 elements d) 8 elements
30. Lanthanide contraction is caused due to
a) The appreciable shielding on outer electrons by 4𝑓-electrons from the nuclear charge.
b) The appreciable shielding on outer electrons by 5𝑑-electrons from the nuclear charge.
c) The same effective nuclear charge from Ce to Lu.
d) The imperfect shielding on outer electrons by 4𝑓-electrons from the nuclear charge.
31. The properties of Zr and Hf are similar because
a) Both belong to 𝑑-block b) Both belong to same group of Periodic Table
c) Both have similar radii d) Both have same number of electrons
32. In nitroprusside ion, the iron and NO exist as Fe11 and NO+ rather than FeIII and NO. These forms can be
differentiated by :
a) Estimating the concentration of iron
b) Measuring the concentration of CN−.
c) Measuring the solid state magnetic moment
d) Thermally decomposing the compound
33. Railway wagon axles are made by heating rods of iron embedded in charcoal powder. The process is
known as
a) Case hardening b) Tempering c) Sheradizing d) Annealing
34. A substance which is not paramagnetic is:
a) Cr(ClO4)3 b) KMnO4 c) TiCl3 d) VOBr2
35. Which pair of compounds is expected to show similar colour in aqueous medium?
a) FeCl3 and CuCl2 b) VOCl2 and CuCl2 c) VOCl2 and FeCl2 d) FeCl2 and MnCl2
36. Lunar caustic is chemically:
a) Silver chloride b) Silver nitrate c) Sodium hydroxide d) Potassium nitrate
37. Lanthanoids and actinoids resembles in:
a) Electronic configuration
b) Oxidation state
c) Ionisation energy
d) Formation of complex
38. Horn silver is:
a) AgCl b) Ag2S c) SnS d) AgNO3
39. Silver nitrate solution gives a red precipitate with:
a) Sodium iodide b) Potassium chloride c) Calcium nitrate d) Sodium chromate
40. Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which
one of them?
a) (𝑛 − 1)𝑑8 𝑛𝑠2 b) (𝑛 − 1)𝑑5 𝑛𝑠1 c) (𝑛 − 1)𝑑3 𝑛𝑠2 d) (𝑛 − 1)𝑑5 𝑛𝑠2
41. Powdered silver ore is treated with NaCN solution and air is bubbled through the mixture to give:
a) AgCN b) Ag c) Ag(CN)2 d) Na[Ag(CN)2]
42. Chromium has most stable oxidation state of:
a) +5 b) +3 c) +2 d) +4
43. Cuprous salts are generally colourless while cuprous oxide is:
a) Green b) Blue c) Red d) Yellow
44. Which of the following manganese oxide is amphoteric?
a) MnO2 b) Mn2O3 c) Mn2O7 d) MnO
45. Impurities of Cu and Ag from gold are removed by
a) Boiling impure gold with dil.H2SO4 b) Boiling impure gold with conc.H2SO4
c) Electrolytically d) Both (b) and (c)
46. Identify the incorrect statement among the following
𝑑-block elements show irregular and erratic La and Lu have partially filled 𝑑-orbitals and no
a) b)
chemical properties among themselves. other partially filled orbital.
c) The chemistry of various lanthanoids is very
d) 4𝑓 and 5𝑓-orbitals are equally shielded.
similar.
47. Which of the following ions form most stable complex compound?
a) Mn2+ b) Ni2+ c) Fe2+ d) Cu2+
48. Silver halides are used in photography because they are:
a) Photosensitive
b) Soluble in hyposolution
c) Soluble in NH4OH
d) Insoluble in acids
49. (NH4)2Cr2O7 on heating gives a gas which is also given by
a) Heating NH4NO2 b) Heating NH4NO3 c) Mg3N2 + H2O d) Na(Comp.)+ H2O2
50. Gold dissolves in aqua regia forming:
a) Auric chloride b) Aurous chloride c) Chloroauric acid d) Aurous nitrate
1.C 41.B
2.C 42.C
3.A 43.A
4.A 44.D
5.D 45.D
6.D 46.D
7.B 47.A
8.D 48.A
9.D 49.C
10.A 50.D
11.C
12.D
13.C
14.D
15.A
16.D
17.B
18.A
19.A
20.B
21.B
22.D
23.A
24.A
25.C
26.C
27.D
28.B
29.D
30.C
31.C
32.A
33.B
34.B
35.B
36.A
37.A
38.D
39.D
40.D