Practice Questions

Q40.Consider the following equilibrium AgCl ↓+2NH3 ⇌[Ag(NH322]+ + Cl− White precipitate of AgCl appears on adding which of the following? JEE Main 2014 (11 Apr Online) JEE Main Previous Year Paper (1) NH3 (2) aqueous NaCl (3) aqueous HNO3 (4) aqueous NH4Cl

Q40.What happens when an inert gas is added to an equilibrium keeping volume unchanged? (1) More product will form (2) Less product will form (3) More reactant will form (4) Equilibrium will remain unchanged

Q40.Example of a three-dimensional silicate is : (1) Ultramarines (2) Feldspars (3) Zeolites (4) All of these

Q41.The major organic compound formed by the reaction of 1, 1, 1 - trichloroethane with silver powder is : (1) Acetylene (2) Ethene (3) 2 - Butyne (4) 2 - Butene

Q41.In which of the following pairs A is more stable than B? (1) (2) (3) (4)

Q41.The conjugate base of hydrazoic acid is: (1) N−3 (2) N−3 (3) N−2 (4) HN−3

Q41.Assuming that the degree of hydrolysis is small, the pH of 0.1M solution of sodium acetate (Ka = 1.0 × 10−5) will be: (1) 5.0 (2) 6.0 (3) 8.0 (4) 9.0

Q41.Which of these statements is not true ? (1) LiAlH4 is versatile reducing agent in organic (2) NO+ is isoelectronic with O2 synthesis. (3) Boron is always covalent in its compounds (4) In aqueous solution, the Tl+ ion is much more stable than Tl (III) JEE Main 2014 (19 Apr Online) JEE Main Previous Year Paper

Q42. CsCl crystallises in body centred cubic lattice. If 'a' is its edge length then which of the following expressions is correct? (1) rCs+ + rCl−= 3a (2) rCs+ + rCl−= 3a2 (3) rCs+ + rCl−= √32 a (4) rCs+ + rCl−= √3a

Q42.In a face centered cubic lattice atoms A are at the corner points and atoms B at the face centered points. If atom B is missing from one of the face centered points, the formula of the ionic compound is : (1) A2B3 (2) AB2 (3) A5B2 (4) A2B5

Q42.Which of the following statements about Na2O2 is not correct? (1) It is diamagnetic in nature (2) It is derivative of H2O2 (3) Na2O2 oxidises Cr3+ to CrO2−4 in acid medium. (4) It is the super oxide of sodium

Q42.Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases H2O2 acts as a reducing agent in acid medium? (1) MnO−4 (2) Cr2O2−7 (3) SO2−3 (4) KI

Q42.The correct IUPAC name of the following compound is : (1) 4 - methyl - 3 - ethylhexane (2) 3 - ethyl - 4 - methylhexane (3) 4 - ethyl - 3 - methylhexane (4) 3, 4 - ethylmethylhexane

Q43.Consider separate solutions of 0. 500 M C2H5 OH (aq), 0. 100 M Mg3 (PO4)2 (aq), 0. 250 M KBr (aq) and 0. 125 M Na3 PO4 (aq) at 25°C. Which statement is true about these solutions, assuming all salts to be JEE Main 2014 (06 Apr) JEE Main Previous Year Paper strong electrolytes? (1) They all have the same osmotic pressure. (2) 0. 100 M Mg3(PO4)2 (aq) has the highest osmotic pressure. (3) 0. 125 M Na3 PO4 (aq) has the highest osmotic (4) 0. 500 M C2H5 OH (aq) has the highest osmotic pressure. pressure.

Q43. The reagent needed for converting (1) Cat. Hydrogenation (2) H2 /Lindlar Cat. (3) Li/NH3 (4) LiAlH4

Q43.A current of 10. 0 A flows for 2. 00 h through an electrolytic cell containing a molten salt of metal X . This results in the decomposition of 0. 250 mol of metal X at the cathode. The oxidation state of X in the molten salt is: (F = 96, 500 C) (1) 1+ (2) 4+ (3) 3+ (4) 2+ JEE Main 2014 (09 Apr Online) JEE Main Previous Year Paper A, B, C and D are −1.2 V,0.6 V, 0.85 V and

Q43.Which one of the following acids does not exhibit optical isomerism? (1) Lactic acid (2) Tartaric acid (3) Maleic acid (4) α-amino acids

Q43.The total number of octahedral void (s) per atom present in a cubic close packed structure is : (1) 1 (2) 2 (3) 3 (4) 4

Q44.Resistance of 0.2 M solution of an electrolyte is 50 Ω. The specific conductance of the solution is 1.4 S m−1 . The resistance of 0.5 M solution of the same electrolyte is 280 Ω. The molar conductivity of 0.5 M solution of the electrolyte in S m2 mol−1 is : (1) 5 × 10−4 (2) 5 × 10−3 (3) 5 × 103 (4) 5 × 102

Q44.The standard electrode potentials (EoM+/M) of four metals −0.76 V, respectively. The sequence of deposition of metals on applying potential is (1) B > D > C > A (2) A > C > B > D (3) C > B > D > A (4) D > A > B > C

Q44.The gas liberated by the electrolysis of Dipotassium succinate solution is: (1) Ethane (2) Ethyne (3) Ethene (4) Propene

Q44. on mercuration-demercuration produces the major product: JEE Main 2014 (12 Apr Online) JEE Main Previous Year Paper (1) (2) (3) (4)

Q44.For an ideal solution of two components A & B, which of the following is true? (1) ΔHmixing > 0 (zero) (2) A −B interaction is stronger than A −A & B −B. interactions (3) A −A, B −B & A −B interactions are (4) ΔHmixing < 0 (zero) identical

Q45.The equivalent conductance of NaCl at concentration C and at infinite dilution are λC and λ∞ , respectively. The correct relationship between λC and λ∞ is given as : (where the constant B is positive) (1) λC = λ∞+ (B)C (2) λC = λ∞−(B)C (3) λC = λ∞−(B)√C (4) λC = λ∞+ (B)√C

Q45.The half-life period of a first-order reaction is 15 minutes. The amount of substance left after one hour will be (1) 1 of the original amount (2) 1 of the original amount. 16 8 (3) 1 of the original amount. (4) 1 of the original amount. 32 4