ExamPlay Dark Logo
وارد شوید

JEE MAIN - Chemistry (2014 (Offline))

  • 1
    Resistance of 0.2 M solution of an electrolyte is 50 $$\Omega$$. 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 $$\Omega$$. The molar conductivity of 0.5 M solution of the electrolyte in S m2 mol-1 is :
    پاسخ دهید
    (C)
    5 × 10-4
  • 2
    Consider separate solutions of 0.500 M C2H5OH(aq), 0.100 M Mg3(PO4)2(aq), 0.250 M KBr(aq) and 0.125 M Na3PO4(aq) at 25oC. Which statement is true about these solutions, assuming all salts to be strong electrolytes?
    پاسخ دهید
    (C)
    They all have the same osmotic pressure
  • 3
    For the estimation of nitrogen, 1.4 g of organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10 sulphuric acid. The unreacted acid required 20 ml of M/10 sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is:
    پاسخ دهید
    (D)
    10%
  • 4
    In which of the following reactions H2O2 acts as a reducing agent?
    1. H2O2 + 2H+ + 2e- $$\to$$ 2H2O
    2. H2O2 - 2e- $$\to$$ O2 + 2H+
    3. H2O2 + 2e- $$\to$$ 2OH-
    4. H2O2 + 2OH- - 2e- $$\to$$ O2 + 2H2O
    پاسخ دهید
    (D)
    2, 4
  • 5
    For the reaction SO2 (g) + $${1 \over 2} O_2(g) \leftrightharpoons$$ SO3(g).
    if KP = KC(RT)x where the symbols have usual meaning then the value of x is: (assuming ideality)
    پاسخ دهید
    (B)
    -1/2
  • 6
    For complete combustion of ethanol, C2H5OH(l) + 3O2(g) $$\to$$ 2CO2(g) + 3H2O(l) the amount of heat produced as measured in bomb calorimeter, is 1364.47 kJ mol–1 at 25oC. Assuming ideality the Enthalpy of combustion, $$\Delta _CH$$, for the reaction will be : (R = 8.314 kJ mol–1)
    پاسخ دهید
    (C)
    – 1366.95 kJ mol–1
  • 7
    Given below are the half-cell reactions:

    Mn2+ + 2e- $$\to$$ Mn; Eo = -1.18 V

    2(Mn3+ + e- $$\to$$ Mn2+); Eo = +1.51 V

    The Eo for 3Mn2+ $$\to$$ Mn + 2Mn3+ will be :
    پاسخ دهید
    (C)
    – 2.69 V; the reaction will not occur
  • 8
    The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1 : 4. The ratio of number of their molecule is:
    پاسخ دهید
    (D)
    7 : 32
  • 9
    The major organic compound formed by the reaction of 1, 1, 1– trichloroethane with silver powder is:
    پاسخ دهید
    (A)
    2- Butyne
  • 10
    Sodium phenoxide when heated with $$C{O_2}$$ under pressure at $${125^ \circ }C$$ yields a product which on acetylation products $$C.$$

    JEE Main 2014 (Offline) Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 215 English

    The major product $$C$$ would be
    پاسخ دهید
    (A)
    JEE Main 2014 (Offline) Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 215 English Option 1
  • 11
    Which one of the following bases is not present in DNA?
    پاسخ دهید
    (C)
    Quinoline
  • 12
    Considering the basic strength of amines in aqueous solution, which one has the smallest pKb value?
    پاسخ دهید
    (C)
    (CH3)2NH
  • 13
    On heating an aliphatic primary amine with chloroform and ethanolic potassium hydroxide, the organic compound formed is:
    پاسخ دهید
    (B)
    an alkyl isocyanide
  • 14
    The most suitable reagent for the conversion of R - CH2 - OH $$\to$$ R - CHO is:
    پاسخ دهید
    (B)
    PCC (Pyridinium Chlorochromate)
  • 15
    In the reaction,
    JEE Main 2014 (Offline) Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 221 English
    the product C is:
    پاسخ دهید
    (A)
    Ethylene
  • 16
    In SN2 reactions, the correct order of reactivity for the following compounds:
    CH3Cl, CH3CH 2Cl, (CH3)2CHCl and (CH3)3CCl is:
    پاسخ دهید
    (D)
    CH3Cl > CH3CH2Cl > (CH3)2CHCl > (CH3)3CCl
  • 17
    The equation which is balanced and represents the correct product(s) is :
    پاسخ دهید
    (D)
    [CoCl(NH3)5]+ + 5H+ $$\to$$ Co2+ + $$5NH_4^+$$ + Cl-
  • 18
    The octahedral complex of a metal ion M3+ with four monodentate ligands L1, L2, L3 and L4 absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is :
    پاسخ دهید
    (D)
    L1 < L3 < L2 < L4
  • 19
    Which series of reactions correctly represents chemical relations related to iron and its compound?
    پاسخ دهید
    (D)
    Fe $$\buildrel {{O_2},\,heat} \over \longrightarrow $$ Fe3O4 $$\buildrel {CO,\,{{600}^o}C} \over \longrightarrow $$ FeO $$\buildrel {CO,\,{{700}^o}C} \over \longrightarrow $$ Fe
  • 20
    The correct statement for the molecule, CsI3 is :
    پاسخ دهید
    (D)
    it contains Cs+ and $$I_3^-$$ ions
  • 21
    Which one of the following properties is not shown by NO?
    پاسخ دهید
    (C)
    It is diamagnetic in gaseous state
  • 22
    For the non – stoichiometre reaction 2A + B $$\to$$ C + D, the following kinetic data were obtained in three separate experiments, all at 298 K.
    Initial Concentration (A) Initial Concentration (B) Initial rate of formation of C (mol L-1 s-1)
    0.1 M 0.1 M 1.2 x 10-3
    0.1 M 0.2 M 1.2 x 10-3
    0.2 M 0.1 M 2.4 x 10-3
    The rate law for the formation of C is:
    پاسخ دهید
    (B)
    $${{dc} \over {dt}} = k[A]$$
  • 23
    The equivalent conductance of NaCl at concentration C and at infinite dilution are $${\lambda _C}$$ and $${\lambda _\infty }$$, respectively. The correct relationship between $${\lambda _C}$$ and $${\lambda _\infty }$$ is given as: (where the constant B is positive)
    پاسخ دهید
    (C)
    $${\lambda _C} = {\lambda _\infty } - (B)\sqrt C$$
  • 24
    The correct set of four quantum numbers for the valence elections of rubidium atom (Z= 37) is:
    پاسخ دهید
    (C)
    5, 0, 0, + 1/2