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प्रश्न
Why do fire flies glow at night ?
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उत्तर
Fire flies are associated with certain protein. In the presence of a enzyme, the protein undergoes aerial oxidation. The reaction is accompanied by emission of light. As a result, fire flies glow at night.
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संबंधित प्रश्न
Write the balanced equation for the following chemical reaction.
\[\ce{Hydrogen + Chlorine -> Hydrogen chloride}\]
Differentiate between:
Reactants and products.
State four conditions necessary for a chemical reaction to take place.
Balance the following equations Also name the products formed.
`K+CI_2→ KCI`
Balance the following equation. Also name the products formed.
`KCIO_3 → KCI +O_2`
Name the type of chemical reaction shown by the following equation.
NaOH + HCI → NaCI + H2O
Balance the following equation:
\[\ce{Na2O + H2O->NaOH}\]
Balance the following equation:
\[\ce{CaO + HCl->CaCl2 + H2O}\]
Underline the incorrectly balanced compound equation and rewrite the correct equation.
\[\ce{FeCl3 + 3NH4OH->2NH4Cl + Fe(OH)3}\]
Balance the following important equation:
FeCl3 + NH4OH → NH4Cl + Fe(OH)3
Balance the following important equation:
Fe2O3 + Al → Al2O3 + Fe
Balance the following important equation:
C + HNO3 (conc.) → CO2 + H2O + NO2
Balance the following important equation:
Cu + HNO3 (conc.) → Cu(NO3)2 + H2O + NO2
A teacher gave two test tubes to the students, one containing water and the other containing sodium hydroxide. She asked them to identify the test tube containing sodium hydroxide solution. Which one of the following can be used for identification?
In which of the following chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature?
Complete the missing component /variable given as x and y in the following reactions :
`"Pb"("NO"_3)_2("aq") + 2"Kl"("aq") -> "Pbl"_2(x) + 2"KNO"_3("y")`
Which among the following change is exothermic or endothermic in nature?
Decomposition of ferrous sulphate
Write the balanced chemical equation for the following reaction
Sodium carbonate on reaction with hydrochloric acid in equal molar concentrations gives sodium chloride and sodium hydrogencarbonate.
What are the points to be followed while balancing a chemical equation?
Complete and balance the following equation:
\[\ce{Al2O3 + NaOH ->}\]
