NEET : Chemical Analysis 1
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Question 1 of 50
1. Question
4 pointsThe gas which is absorbed by ferrous sulphate solution giving blackish brown colour is
(A) NO (B) CO (C) N2 (D) NH2
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Question 2 of 50
2. Question
4 pointsBr2 vapour turns starch + KI paper to
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Question 3 of 50
3. Question
4 pointsWhich of the following mixture is chromic acid
(A) K2Cr2O7 and HCl (B) K2SO4 and conc. H2SO4
(C) K2Cr2O7 and conc. H2SO4 (D) H2SO4 and HClCorrect
Incorrect
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Question 4 of 50
4. Question
4 pointsWhich of the following compounds is brown coloured
(A) Fe [Fe(CN)4] (B) Fe[Fe(CN)6]
(C) Fe4[Fe(CN)6] (D) K2Fe[Fe(CN)6]Correct
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Question 5 of 50
5. Question
4 pointsFor the preparation of sodium thiosulphate by “Springs reaction”, the reactants used are
(A) Na2S + Na2SO3 + Cl2 (B) Na2S + SO2
(C) Na2SO3 + S (D) Na2S + Na2SO3 +Correct
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Question 6 of 50
6. Question
4 pointsOzone when reacts with potassium iodide solution liberates certain product, which turns starch paper blue. The liberated substance is…….
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Question 7 of 50
7. Question
4 pointsIn borex bead test, which of the following compound is formed
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Question 8 of 50
8. Question
4 pointsThe brown ring test for NO2 and NO3– is due to the formation of complex ion with the formula
(A) [Fe(H2O)6]2+ (B) [Fe(NO) (CN)5]2+
(C) [Fe(H2O)5NO]2+ (D) [Fe(H2O) (NO)5]2+Correct
Incorrect
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Question 9 of 50
9. Question
4 pointsThe following four solutions are kept in separate beakers and copper metal is put in each of them. Which solution will become blue after some time
(A) AgNO3 solution (B) Zn(NO3)2 solution
(C) Ba(NO3)2 solution (D) NaNO3 solutionCorrect
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Question 10 of 50
10. Question
4 pointsA red solid is insoluble in water. However it becomes soluble if some KI is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is
(A) (NH4)2Cr2O7 (B) HgI2 (C) HgO (D) Pb3O4
Correct
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Question 11 of 50
11. Question
4 pointsA solution of a salt in dilute sulphuric acid imparts deep blue colour with starch iodine solution it confirms the presence of which of the following
(A) NO2– (B) I–
(C) NO3– (D) CH3COO–Correct
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Question 12 of 50
12. Question
4 pointsWhich reagent is used to remove SO–4 and Cl–
(A) BaSO4 (B) NaOH (C) Pb(NO3)2 (D) KOH
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Question 13 of 50
13. Question
4 points[X] + H2SO4 [Y] a colourless gas with irritating smell
[Y] + K2Cr2O7 + H2SO4 green solution
[X] and [Y] is(A) SO32- , SO2 (B) CI– , HCI
(C) S2- , H2S (D) CO32- , CO2Correct
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Question 14 of 50
14. Question
4 pointsAmmonia reacts with excess of chlorine to form
(A) N2 and HCl (B) NH4Cl and NCl3
(C) NCl3 and HCl (D) N2 and NH4ClCorrect
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Question 15 of 50
15. Question
4 pointsFe2+ ion can be distinguished by Fe3+ ion by
(A) NH4SCN (B) AgNO3
(C) BaCl2 (D) None Of TheseCorrect
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Question 16 of 50
16. Question
4 pointsWhich of the following is not precipitated as sulphide by passing H2S in presence of conc. HCl
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Question 17 of 50
17. Question
4 pointsConcentrated sodium hydroxide can separate a mixture of
(A) Zn2+ and Pb2+ (B) Al3+ and Zn3+
(C) Cr3+ and Fe3+ (D) Al3+ and Cr3Correct
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Question 18 of 50
18. Question
4 pointsAn aqueous solution of an inorganic salt on treatment with HCl gives a white precipitate. This solution contains
(A) Hg2+2 (B) Hg2+ (C) Zn2+ (D) Cd2+
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Question 19 of 50
19. Question
4 pointsOn performing a borax-bead test with a given inorganic mixture for qualitative analysis, the colour of the bead was found to be emerald green both in oxidising and reducing flame. It indicates the possibility of the presence of
(A) Co+2 (B) Ni+2 (C) Cr+3 (D) Cu+2
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Question 20 of 50
20. Question
4 pointsAddition of SnCl2 to HgCl2 gives ppt
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Question 21 of 50
21. Question
4 pointsWhen dilute aqueous solution of AgNO3 (excess) is added to KI solution, positively charged sol. Particles of AgI are formed due to adsorption of ion
(A) NO–3 (B) O–2 (C) Ag+ (D) K+
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Question 22 of 50
22. Question
4 pointsThe ion formed with the reaction of nitrous acid and hydrochloric acid is
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Question 23 of 50
23. Question
4 pointsColourless crystalline salt ‘X’ is soluble in dilute HCI. On adding NaOH solution, it gives a white precipitate which is insoluble in excess of NaOH. ‘X’ is
(A) Al2(SO4)3 (B) ZnSO4 (C) MgSO4 (D) SnCl2
Correct
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Question 24 of 50
24. Question
4 pointsPrecipitate of group IV cations takes place when H2S is
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Question 25 of 50
25. Question
4 pointsWhen H2S gas is passed through the HCl containing aqueous solutions of CuCl2, HgCl2, BiCl3 and CoCl2, which does not precipitate out
(A) CuS (B) HgS (C) Bi2S3 (D) CoS
Correct
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Question 26 of 50
26. Question
4 pointsGroup reagent for analytic group IV is
(A) NH4Cl + NH4OH (B) NH4Cl + NH4OH + H2S
(C) NH4OH + (NH4)2CO3 (D) HCl + H2SCorrect
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Question 27 of 50
27. Question
4 pointsWhen H2S is passed through Hg2S we get
(A) HgS (B) HgS + Hg2S (C) Hg2S + Hg (D) Hg2S
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Question 28 of 50
28. Question
4 pointsHow do we differentiate between Fe3+and Cr3+ in group III
(A) By taking excess of NH4OH solution
(B) By increasing NH4+ ion concentration
(C) By decreasing OH– ion concentration
(D) Both (b) and (c)Correct
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Question 29 of 50
29. Question
4 pointsWhen H2S is passed through a mixture containing Cu+2, Ni+2, Zn+2 in acidic solution then ion will precipitate
(A) Cu+2, Ni+2 (B) Ni+2 (C) Cu+2, Zn+2 (D) Cu+2
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Question 30 of 50
30. Question
4 pointsWhich one of the following sulphides is only completely precipitated when the acidic solution is made dilute
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Question 31 of 50
31. Question
4 pointsMark the correct statement
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Question 32 of 50
32. Question
4 pointsIf Na+ ion and S2- ion is larger than Cl– ion, which of the following will be least soluble in water
(A) MgS (B) NaCl (C) Na2S (D) MgCl2
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Question 33 of 50
33. Question
4 pointsIn Nessler’s reagent for the detection of ammonia the active species is
(A) Hg2CI2 (B) Hg2+ (C) Hg2I2 (D) HgI2-4
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Question 34 of 50
34. Question
4 pointsIn the analysis of basic radicals, the group reagent H2S gas is generally used in the groups
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Question 35 of 50
35. Question
4 pointsWhich radicals are precipitated in (NH4)2CO3 in presence of alkali
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Question 36 of 50
36. Question
4 pointsPhenolphthalein is most suitable indicator for the titration of
(A) CH3COOH and NH4OH (B) CH3COOH and NaOH
(C) HCl and NH4OH (D) H2CO3 and NH4OHCorrect
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Question 37 of 50
37. Question
4 pointsIn acidic medium, dichromate ion oxidises ferrous ion to ferric ion. If the gram molecular weight of potassium dichromate is 294 grams, its gram equivalent weight is……grams
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Question 38 of 50
38. Question
4 pointsThe equivalent weight of KMnO4 in alkaline medium will be
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Question 39 of 50
39. Question
4 pointsIn alkaline condition KMnO4 reacts as follows,
2KMNO4 + 2KOH 2K2MnO4 + H2O + O.
The eq. wt. of KMnO4 isCorrect
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Question 40 of 50
40. Question
4 pointsIn 1gram of a metal oxide, metal precipitated is 0.68gram. what is the equivalent weight of metal
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Question 41 of 50
41. Question
4 pointsIf 20 ml of 0.25 N strong acid and 30 ml of 0.2 N of strong base are mixed, then the resulting solution is
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Question 42 of 50
42. Question
4 pointsThe molecular weight of a tribasic acid is M. What will be its equivalent weight
(A) (B) M
(C) (D)Correct
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Question 43 of 50
43. Question
4 pointsThe strength of a solution (S) in gram/litre, is related to its normality (N) and equivalent weight of solute (E) by the formula
(A)
(B)
(C)
(D) All Of The AboveCorrect
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Question 44 of 50
44. Question
4 pointsThe equivalent weight of a divalent metal is 31.82. The weight of a single atom is
(A)
(B)
(C)
(D)Correct
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Question 45 of 50
45. Question
4 pointsWhat volume of water is to be added to 50 ml of 4 N NaOH solution to obtain a 1 N solution
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Question 46 of 50
46. Question
4 pointsPhenolphthalein is not suitable for the titration of
(A) NaOH vs (COOH)2 (B) KOH vs H2SO4
(C) K2CO3 vs HCl (D) None of theseCorrect
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Question 47 of 50
47. Question
4 pointsHow much of NaOH is required to neutralize 1500 cm3 of 0.1 N HCl (At. wt. of Na = 23)
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Question 48 of 50
48. Question
4 points0.126 g of an acid requires 20 ml of 0.1 N NaOH for complete neutralization. The equivalent weight of the acid is
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Question 49 of 50
49. Question
4 pointsThe ratio of amounts of H2S needed to precipitate all the metal ions from 100 ml of 1 M AgNO3 and 100 ml of 1 M CuSO4 is
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Question 50 of 50
50. Question
4 pointsThe equivalent weight of Zn(OH)2 in the following reaction is equal to its,
[Zn(OH)2 + (NO3) → Zn(OH)(NO3) + H2O](A)
(B)
(C)
(D)Correct
Incorrect