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प्रश्न
Give an example of the following chemical change.
Two gases combine to form white solid
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उत्तर
\[\ce{Nh3_(_g_) + HCI_(_g_) ⇌ NH4CI_(_s_)}\]
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संबंधित प्रश्न
Fill in the blanK
A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Compounds, which in their molten state allow an electric current to pass through them are called
- electrolytes
- non-electrolytes
- non-conductors
- none of these
Select the correct answer for the following options:
The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.
Give a word equation for the following reaction.
A compound which on heating shows – colour change from brown to yellow.
Give balanced equation for the following conversion affected by heat alone on the substance:
Ammonium dichromate to nitrogen
State the following reaction represent oxidation or reduction.
\[\ce{Fe++->Fe+++}\]
Give a balanced equation for the conversion of an ammonium salt to a basic gas.
Magnesium + oxygen → magnesium oxide.
2Mg + O2 → 2Mg O
Write a note on the catalyst.
What is thermochemical reactions?
