ACROSS

1. Substances having H+ ions in common.2. Phenolphthalein burn alkali …………….colour3. Alkalis turn red litmus into……………..

DOWNWARDS

1. Substances having OH+ ions in common.4. Methyl orange shows……….colour5. Acids turn plane litmus into…………..

ACROSS

1

5

2

3

4

1. ACID2. PINK3. BLUE

DOWNWARDS

1. ALKALY4. YELLOW5. RED