Tiêu đề Salt Analysis _ DPP 01 _ Varun JEE Advanced 2024.pdf ✅

JEE ADVANCED 2024 Salt Analysis Single Correct Question 1. Which of the following is not a preliminary test used to detect ions? (1) Borax bead test (2) Flame test (3) Brown ring test (4) Microcosmic salt bead test 2. Which of the following can not evolve more than one gas (vapour) if heated in dry test tube. (1) NaNO3 (s) (2) MgCO3 (s) (3) FeSO4(s) (4) (NH4 )2Cr2O7( s) 3. Which of the following anions are identified by dil. HCl : (1) NO2 −,NO3 −, CO3 2− (2) NO2 −,NO3 −, SO3 2− (3) S 2−, SO3 2−,NO2 − (4) CH3COO−,I −, CO3 2− 4. If addition of conc. H2SO4 is made to an unknown salt, a colourless and odourless gas is produced then which of the following can be present? (1) CO3 2− (2) S 2− (3) Cl− (4) NO3 − 5. A gas has smell like rotten egg and turns lead acetate paper black. The gas is : (1) NO2 (2) H2 S (3) CO2 (4) SO2 More than Type Question 6. An aqueous solution containing S2- ions will not give (1) A yellow precipitate with the suspension of CdCO3 in water (2) Black precipitate with lead acetate solution (3) White precipitate with CaCO3 suspension (4) Purple colour with sodium thiosulphate solution 7. Hydrogen sulphide is not a group reagent for (basic radical) (1) 2 nd group radicals (2) 3 rd group radicals (3) 4 th group radicals (4) 5 th group radicals 8. Which of the following radicals evolve gas or vapour when treated with dil HCl ? (1) SO3 2− (2) C2O4 2− (3) CH3COO− (4) HCO3 − 9. If silver nitrate solution is added to a salt solution and a yellow precipitate is obtained the salt may contain (1) Br− (2) I − (3) Cl− (4) F − 10. Which of the following sulphides are yellow? (1) CdS (2) As2S3 (3) SnS2 (4) ZnS 11. Brown vapours can be of (1) Cl2 (2) I2 (3) Br2 (4) NO2 Integer Type Question 12. How many compounds liberate NH3 on heating from the following? (i) (NH4 )2SO4 (ii) (NH4 )2CO3 (iii) NH4Cl (iv) NH4NO3 (v) (NH4 )2Cr2O7 13. Number of ions which are identified by dil. HCl from the following. (i) SO4 2− (ii) CO3 2− (iii) SO3 2− (v) NO2 − (vi) NO3 − (vii) CH3COO− (iv) HCO3 − (viii) PO4 3− DPP - 01
14. Find the total number of acidic radical which produce volatile product with dil HCl : (i) SO4 2− (ii) CO3 2− (iii) SO3 2− (iv) HCO3 − (v) NO2 − (vi) NO3 − (vii) CH3COO− (viii)PO4 3− 15. Na2 S + Na2 [Fe(CN)5NO] ⟶ "X" (Violet colour) The total number of possible isomers for complex "X" is, provided the ambident behaviour of CNis not considered. 16. NaCl + Solid K2Cr2O7 + Conc. H2SO4 ⟶ "X" (reddish brown fumes) How many axial-d-orbital are involved in hybridization of " X " ? 17. Fe2+ + NO3 − + H2SO4 (conc.) → ' X ' (Brown ring complex) The magnetic moment of complex ' X ' to its nearest integer is Matrix type Questions 18. Match the anions with the changes observed on qualitative analysis : Column- I Column-II (A) SO4 2− (p) Canary yellow ppt. with ammonium molybdate. (B) NO3 − (q) Brown ring test. (C) NO2 − (r) White ppt. with BaCl2 solution. (D) PO4 3− (s) Yellow ppt. with AgNO3 solution. (t) White ppt. with AgNO3 solution. 19. Match the reagent which are used in qualitative analysis of given anions : Column-I Column- II (A) AgNO3 solution (p) CO3 2− (B) BaCl2 solution (q) Cl− (C) Pb(NO3 )2 solution (r) S 2− (D) Acidified KMnO4 solution (s) NO2 −
Answer Key 1. ( 3 ) 2. ( 2 ) 3. ( 3 ) 4. ( 1 ) 5 . ( 2 ) 6 . (3, 4 ) 7. ( 2, 4) 8. (1, 3, 4) 9. (1, 2 ) 10. (1, 2, 3) 11 . (3, 4 ) 12 . ( 3 ) 13 . ( 5 ) 14 . ( 3 ) 15. (3) 16. (0) 17. ( 4 ) 18. (A) -(r,t);(B) -(q);(C) -(q,t);(D) -(p,r,s) 19. (A) -(p,q,r,s);(B) -(p);(C) -(p,q,r);(D) -(q,r,s)