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4. The pair of safety symbols you notice on the bottles of commercial acetic acid
available in the laboratory, is shown in-

5. A student takes 2 mL acetic acid in a dry test tube and adds a pinch of sodium
hydrogen carbonate to it. He makes the following observations:
I. A colourless and odourless gas evolves with a brisk effervescence.
II. The gas turns lime water milky when it is passed through it.
III. The gas bums with an explosion when a burning splinter is brought near it.
IV. The gas extinguishes the burning splinter that is brought near it.
The correct observations are:
(a) I, II and III (b) II, III and IV
(c) III, IV and I (d) IV, I and II
6. Four test tubes A, B, C and D contain sodium hydroxide, sodium sulphate, ethanoic
acid and sodium chloride respectively. In each of the test tubes is added a drop of
blue litmus. The colour of litmus will change to red colour in case of:
(a) Test tube A (b) Test tube B
(c) Test tube C (d) Test tube D
7. Select the correct observation about dilute solution of acetic acid.
(a) It smells like rotten egg and turn blue litmus red.
(b) It smells like vinegar and turns red litmus blue.
(c) It smells like rotten egg and turns red litmus blue.
(d) It smells like vinegar and turns blue litmus red.
8. The most appropriate method of testing the colour of a given liquid is
(a) I (b) II (c) III (d) IV

SIS/PRACTICAL WORK SHEET/Physical and chemical properties of acetic acid[Type text] Page 3/3