Available Answers

1. 1.

   Choose and write the correct answer(MCQs):

   1. Alkalies turn methyl orange:
      1. pink
      2. red
      3. orange
      4. yellow
   2. Sodium bicarbonate is also called:
      1. washing soda
      2. bleaching powder
      3. baking soda 
      4. none of these
   3. Which of these is not indicator?
      1. turmeric
      2. litmus solution
      3. red cabbage
      4. acetic acid
   4. Bases have:
      1. sour taste
      2. sweet taste
      3. bitter taste
      4. salty taste
2. 2.

   Fill in the blanks:

   1. Phenolphthalene turns _______________ in basic solution.
   2. Acids have ____________ taste while bases have __________ taste.
   3. Acids turn ______________ litmus ______________.
   4. Acids furnish _____________ ion in solution where as base furnish _________ ion in solution.
   5. _____________ the reaction between acid and base to form salt and water.
3. 3.

   Write T for true or F for false:

   1. Phenolphthalene give pink colour with acids.
   2. Benzoic acid is present in yellow wasp.
   3. Soluble bases are known as alkalies.
   4. Turmeric contains a natural dye if yellow colour.
   5. Acetic acid is the main constituent of vineger.
   6. Lemon juice contain ascorbic acid.
   7. Sting of wasp is alkaline and can be treated with vinegar.
4. 4.

   Match the column A with column B:

   A	B
   1. Caustic soda	a. sodium bicarbonate (NaHCO3)
   2. Baking soda	b. Sodium hydroxide (NaOH)
   3. Sting of bees	c. Indicator
   4. To remove acidity	d. Lichen
   5. Litmus	e. magnesium hydroxide
   6. Lime water	f. Formic acid
   7. Methyl orange	g. Base

    

5. 5.

   What sort of ions are given by acids and bases? Explain with the help of examples.
6. 6.

   How are acids prepared? Explain with their chemical equation.