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प्रश्न
What do you observe when Phenolphthalein is added to sodium hydroxide solution.
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उत्तर
Solution turns pink
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संबंधित प्रश्न
What do you observe when Blue litmus paper is dipped in dilute hydrochloric acid.
What do you observe when Lead nitrate is heated.
Give two examples of oxides.
Acidic oxide.
A chemical reaction may be ‘reversible’ in nature. State the meaning of the term in italics.
Give a reason why a catalyst is used in certain chemical reactions.
Certain thermal decomposition reaction, resulting in the formation of the oxide. Give a balanced equation for the thermal decomposition of the following, which result in the formation of metallic oxide.
Lead carbonate
\[\ce{PbCO3->[\Delta]PbO + CO2}\]
Certain thermal decomposition reaction, resulting in the formation of the oxide. Give a balanced equation for the thermal decomposition of the following, which result in the formation of metallic oxide.
Calcium hydroxide
\[\ce{Ca[OH]2->[\Delta]CaO + H2O}\]
Give a balanced equation for the formation of the following oxide –
Sulphur dioxide from a non-metal
Give one example of –
A mixed oxide
Give one example of –
A dioxide
