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प्रश्न
Fill in the blank with the correct word from the options given below:
A chemical equation is a shorthand form for a _______ change.
पर्याय
physical
chemical
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उत्तर
A chemical equation is a shorthand form for a chemical change.
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संबंधित प्रश्न
Balance the chemical equation.
\[\ce{HNO3 +Ca(OH)2 -> Ca(NO3)2 + H2O}\]
What is meant by chemical reaction? Explain with the help of an example.
State one characteristic of the chemical reaction which takes place when quicklime is treated with water
Is Respiration an endothermic reaction or an exothermic reaction?
Write symbolic representation for the following word equation and balance them :
Aluminium + Chlorine → Aluminium chloride.
Complete the following equation:
CH3COOH + NaOH →
Write word equation for the following molecular equation:
Na2SO3 + 2HCl [dil.] → 2NaCl + H2O + SO2 [g]
A chemical reaction is generally accompanied by certain external indications or characteristics. These include – change of – (a) colour (b) state (c) smell (d) evolution of gas (e) formation of precipitate (f) evolution or absorption of heat. With reference to change of colour – state the change in colour seen when the following are heated – copper carbonate.
Balance the following simple equation:
K + H2O → KOH + H2
Write the skeleton equation for the following word equation and then balance them.
- Carbon + Oxygen → Carbon dioxide.
- Phosphorus + Chlorine → Phosphorus pentachloride.
- Sulphur + Oxygen → Sulphur dioxide.
- Magnesium + hydrogen → Magnesium + Hydrogen chloride chloride.
