(d) 4          1         2
Ans: (c)
94. In the process of cleaning, soap functions by:
         1) changing hard water into soft water.
         2) reducing oily and greasy dirt into colloidal particles.
         3) converting the dirt to lather and water soluble particles.
         4) increasing the cleansing properties of water.
    (a) 1 and 4
    (b) 2 only
    (c) 3 only
    (d) 4 only
Ans: (b)
95. The number of carbon atoms in the following compounds vary. What is the increasing order in which they are present in
    the compounds?
         1) Butane
         2) Methane
         3) Ethane
         4) Decane
    (a) 2, 3, 1, 4
    (b) 1, 2, 3, 4
    (c) 1, 4, 2, 3
    (d) 4, 3, 2, 1
Ans: (a)
96. Give the chronological order of the birth of the following scientists:
         1) John Dalton
         2) Linus Pauling
         3) Dmitri Mendeleev
         4) Ptolemy
    (a) 1, 3, 2, 4
    (b) 1, 4, 3, 2
    (c) 2, 3, 1, 4
    (d) 2, 4, 3, 1
Ans: (a)
97. A deuterium nucleus consists of:
    (a) one proton and two electrons
    (b) one proton and one neutron
    (c) one proton and three neutrons
    (d) one neutron and two protons
Ans: (b)
98. The symbols used to denote different elements are generally the first or the first two letters of the name by which the
    particular element is commonly known. Which of the following elements do not fall in this category?
         1) Osmium
         2) Tungsten
         3) Silver
         4) Antimony
    (a) 1, 2 and 3
    (b) 1, 2 and 4
    (c) 2, 3 and 4
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