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Chemistry in daily life Bio molecules Polymers Environmental chemistry Nitrogenous compound Aldehyde and ketone Alcohol and phenol Halo alkane Hydrocarbon Basic concept of organic chemistry Coordination chemistry d&f block element p-block element part 3 p – block element part 2 p-block element part 1 s-block element Hydrogen Principal of extraction of metal Surface chemistry Chemical kinetics Electro chemistry Solution Chemical equilibrium Thermodynamics State of matter Chemical bonding Classification of element Atomic structure Basic concept of chemistry
  • Which has maximum pH :
    M/4 KOH
    M/4 NaOH
    M/4 NH4OH
    M/4 Ca(OH)2
  • Which is Lewis acid:
    Cl-
    PF3
    C2HOH
    H3O+
  • Consider the complete dissociation of 0.1M NaOH solution. Its pH is equal to :
    11
    13
    14
    15
  • Which among the following acts as Lewis acid in the reaction
    SnCl2 + 2Cl → SnCl4 + 2e- :
    SnCl4
    Cl
    SnCl2
    none of these
  • On increasing the temperature the pKw :
    increases
    decreases
    remains constant
    may increase or decrease
  • Condition in which maximum yield will be obtained :
    H2X2 + Heat ⇔ 2HX :
    high pressure, low temperature
    low pressure, high temperature
    high temperature, high pressure
    low temperature, low pressure
  • A chemical reaction is in equilibrium when :
    the reactants are completely converted to product
    formation of product is minimum
    reactants and products are in equal quantity
    the rate of forward reaction is equal to the rate of backward reaction
  • pH of 10-3 M solution of HCl acid is :
    1.3
    2.0
    4.5
    3.5
  • which among the following salts give acidic solution in water :
    CH3COONa
    NH4Cl
    NaCl
    CH3COONH4
  • pH of which type of aqueous solution is Zero:
    neutral
    amphoteric
    acidic
    alkaline