1.

    Commercial detergents contain mainly:

    A

    RONa

    B

    RCOONa

    C

    ROSO3Na{\rm{ROS}}{{\rm{O}}_3}{\rm{Na}}

    D

    ROCH2CHORCH2ORR{\rm{OC}}{{\rm{H}}_2}{\rm{CHO}}R{\rm{C}}{{\rm{H}}_2}{\rm{O}}R

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    3.

    Toilet soap is:

    A

    A mixture of calcium and sodium salts of higher fatty acids

    B

    A mixture of potassium stearate and glycerol

    C

    A mixture of sodium salts of higher fatty acids

    D

    A mixture of potassium salts of higher fatty acids

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    5.

    Which of the following statement is in correct ?

    A

    Option A: The derivative of sin(x) is cos(x).

    B

    Option B: The integral of 1/x dx is ln|x| + C.

    C

    Option C: The sum of the angles in a triangle is 200 degrees.

    D

    Option D: Euler's formula relates complex exponentials to trigonometric functions.

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    9.

    Toilet soap is:

    A

    A mixture of calcium and sodium salts of higher fatty acids

    B

    A mixture of potassium stearate and glycerol

    C

    A mixture of sodium salts of higher fatty acids

    D

    A mixture of potassium salts of higher fatty acids

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