Look at the given reaction.
Hydrochloric acid + Sodium hydroxide (base) → Sodium
chloride (salt) + Water
Sodium chloride formed in this reaction remains in solution
form. Can we get solid sodium chloride from this solution?
Suggest a method (if any).
How do currents affect the temperature? How does it affect the temperature
of coastal areas in the N. W. Europe?
Which of the following is an acid-base indicator?
(a) Vinegar
(b) Lime water
(c) Turmeric
(d) Baking soda
On adding phenolphthalein indicator to a colourless solution,
no change is observed. What is the nature of this solution?
(a) Basic
(b) Either acidic or basic
(c) Either acidic or neutral
(d) Either basic or neutral
Which of the following set of substances contain acids?
(a) Grapes, lime water
(b) Vinegar, soap
(c) Curd, milk of magnesia
(d) Curd, vinegar
A solution changes the colour of turmeric indicator from
yellow to red. The solution is
(a) basic
(b) acidic
(c) neutral
(d) either neutral or acidic
Neutralisation reaction is a
(a) physical and reversible change.
(b) physical change that cannot be reversed.
(c) chemical and reversible change.
(d) chemical change that cannot be reversed.
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