Chapter 5 : Acids, Bases and Salts
Fill in the blanks :
1. Spinach contains_____________ acid while tamarind contains ________________ acid.
2. The gas which escapes out from many aerated soft drink is _____________
3. Carbon burns in air to form _______________
4. The chemical name of lime water is ______________
5. _______________ is the reaction between an acid and base.
6. An aqueous solution of sodium oxide changes ________________ litmus to blue.
7. Phenolphthalein indicator turns acidic solutions to ______________ and basic solutions to _____________.
8. The chemical name of moist baking soda is _____________
9. Calamine solution contains __________________( a base ).
10.Litmus is obtained from the _____________________
11.Curd contains __________ while vinegar contains ___________
Complete the following word equations :
1. Zinc + hydrochloric acid ___________+ _____________
2. Sodium hydroxide + Hydrochloric acid ___________+ ________
3. Calcium hydroxide + sulphuric acid _____________+ ________
True or False :
1. All acids turn blue litmus red. True / False
2. Neutral solution can change the colour of litmus. True / False
3. Orange juice turns blue litmus red. True / False
4. Substances which are neither acidic nor basic are called neutral. True/ False
5. An acid and a base neutralize each other and from a salt. True / False.
6. China rose indicator turns acidic solution to green. True / False
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