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Chemistry Test - 20

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Chemistry Test - 20
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Weekly Quiz Competition
  • Question 1
    3 / -1

    Solution

  • Question 2
    3 / -1

    The best method to separate the mixture of ortho and para nitrophenol (1 : 1) is

    Solution

  • Question 3
    3 / -1

    Slag is represented by

    Solution

    Slag is a partially vitreous by-product of smelting ore to separate the metal fraction from the unwanted fraction. It can usually be considered as a mixture of metal oxides and silicon dioxide. So, CaSiO3 is known as slag.

  • Question 4
    3 / -1

    Dacron is a polymer of

    Solution

    Dacron is synthesized by transesterification of two monomers: Ethylene glycol and Dimethyl terephthalate.

  • Question 5
    3 / -1

    Berthelot’s synthesis is used for the manufacture of

    Solution

    Berthelot synthesised acetylene gas, which he named although it had been discovered earlier, by passing hydrogen through an electric arc produced with carbon poles.

  • Question 6
    3 / -1

    What is the number of isomeric primary amines obtained from C4H11N?

    Solution

  • Question 7
    3 / -1

    The various processes, involved in the extraction of metals from their ores and refining, are known as

    Solution

    The Process of Extraction of Metals from their Ores and refining them is known as Metallurgy.

  • Question 8
    3 / -1

    Which of the term in green chemistry is used for the process where no solvent is used?

    Solution

    The term sonochemistry is used for the process where no solvent is used.

    Sonochemistry is a branch of chemical research dealing with the chemical effects and applications of ultrasonic waves, i.e., sound at high frequencies that the human ear finds difficult to respond and eventually the human hearing threshold is reached, normally around 18–20kHz for adults.

  • Question 9
    3 / -1

    The rate constants were found to be K1 and K2, when a reaction was carried out at 310 K and 290 K respectively.

    The two rate constants are related as:

    Solution

    This option is correct because for every 10 degree rise in temprature, rate constant doubles.

    Aince, T1 = T2 + 20

    Hence, K1 = 4 K2

    => K2 = 0.25 K1

    Hence, this option is correct.

  • Question 10
    3 / -1

    Reaction of ethyl acetate with excess of CH3MgI followed by hydrolysis gives

    Solution

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