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science worksheet 5

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Worksheet no.5 DISTINGUISH BETWEEN                ACID                       BASE Acid turns blue litmus paper red   Bases turns red litmus blue Acids are sour in taste   Bases are bitter intaste Acids shows pH less than 7   Bases shows pH more than 7 Acids give H+ ions Bases gives OH- ions Ex-HCL, Lemon , Ex-magnesium hydroxide, NAOH
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science worksheet 4

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Worksheet no 4 True or false State whether true of false . 1)    Nitric acid turns red litmus paper blue. 2)    Sodium hydroxide turns blue litmus paper red. 3)    Indicator is a substance which shows different colours   in acidic and basic solution .   4)If an indicator changes colour with a base ,it does not change colour with an acid.   5)Change of colour in an acid and a base depends on the type of the indicator
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