ExamPlay Dark Logo
Đăng nhập

JEE MAIN - Chemistry (2016 (Offline))

  • 1
    Decomposition of H2O2 follows a first order reaction. In fifty minutes the concentration of H2O2 decreases from 0.5 to 0.125 M in one such decomposition. When the concentration of H2O2 reaches 0.05 M, the rate of formation of O2 will be :
    Trả lời
    (A)
    6.93 $$\times$$ 10-4 mol min-1
  • 2
    Galvanization is applying a coating of :
    Trả lời
    (C)
    Zn
  • 3
    18 g glucose (C6H12O6) is added to 178.2 g water. The vapor pressure of water (in torr) for this aqueous solution is :
    Trả lời
    (B)
    752.4
  • 4
    The reaction of propene with HOCl (Cl2 + H2O) proceeds through the intermediate:
    Trả lời
    (D)
    $$\mathrm{CH}_{3}-\mathrm{CH}^{+}-\mathrm{CH}_{2}-\mathrm{Cl}$$
  • 5
    At 300 K and 1 atm, 15 mL of a gaseous hydrocarbon requires 375 mL air containing 20% O2 by volume for complete combustion. After combustion the gases occupy 345 mL. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is:
    Trả lời
    (A)
    C3H8
  • 6
    The distillation technique most suited for separating glycerol from spent-lye in the soap industry is :
    Trả lời
    (D)
    Distillation under reduced pressure
  • 7
    The reaction of zinc with dilute and concentrated nitric acid, respectively, produces :
    Trả lời
    (D)
    N2O and NO2
  • 8
    The equilibrium constant at 298 K for a reaction A + B $$\leftrightharpoons$$ C + D is 100. If the initial concentration of all the four species were 1M each, then equilibrium concentration of D (in mol L–1) will be:
    Trả lời
    (B)
    1.818
  • 9
    The heats of combustion of carbon and carbon monoxide are –393.5 and –283.5 kJ mol–1, respectively. The heat of formation (in kJ) of carbon monoxide per mole is :
    Trả lời
    (C)
    –110
  • 10
    The product of the reaction given below is :

    JEE Main 2016 (Offline) Chemistry - Alcohols, Phenols and Ethers Question 144 English
    Trả lời
    (D)
    JEE Main 2016 (Offline) Chemistry - Alcohols, Phenols and Ethers Question 144 English Option 4
  • 11
    $$2$$-chloro-$$2$$-methylpentane on reaction with sodium methoxide in methanol yields:

    JEE Main 2016 (Offline) Chemistry - Alcohols, Phenols and Ethers Question 146 English
    Trả lời
    (C)
    $$(c)$$ only
  • 12
    The absolute configuration of

    JEE Main 2016 (Offline) Chemistry - Basics of Organic Chemistry Question 214 English

    is :
    Trả lời
    (D)
    $$(2S, 3R)$$
  • 13
    In the Hofmann bromamide degradation reaction, the number of moles of NaOH and Br2 used per mole of amine produced are:
    Trả lời
    (C)
    Four moles of NaOH and one mole of Br2
  • 14
    Thiol group is present in :
    Trả lời
    (C)
    Cysteine
  • 15
    The pair having the same magnetic moment is :
    [At. No.: Cr = 24, Mn = 25, Fe = 26, Co = 27]
    Trả lời
    (A)
    [Cr(H2O)6]2+ and [Fe(H2O)6]2+
  • 16
    Which one of the following complexes shows optical isomerism?
    (en = ethylenediamine)
    Trả lời
    (A)
    cis[Co(en)2Cl2]Cl
  • 17
    Which of the following compounds is metallic and ferromagnetic ?
    Trả lời
    (A)
    CrO2
  • 18
    A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference V esu. If e and m are charge and mass of an electron, respectively, then the value of h / $$\lambda $$ (where $$\lambda $$ is wavelength associated with electron wave) is given by :
    Trả lời
    (C)
    $$\sqrt {2meV} $$
  • 19
    The species in which the $\mathrm{N}$ atom is in a state of $s p$ hybridization is :
    Trả lời
    (A)
    $\mathrm{NO}_2^{+}$