Advertisements
Advertisements
प्रश्न
Which of the following are combination reactions?
- `2"KClO"_3 overset("Heat")(->) 2"KCl" + 3"O"_2`
- `"MgO" + "H"_2"O" -> "Mg"("OH")_2`
- `4"Al" + 3"O"_2 -> 2"Al"_2"O"_3`
- `"Zn" + "FeSO"_4 -> "ZnSO"_4 + "Fe"`
विकल्प
(i) and (iii)
(iii) and (iv)
(ii) and (iv)
(ii) and (iii)
Advertisements
उत्तर
(ii) and (iii)
Explanation -
Both the reactions (ii) and (iii) are the examples of combination reactions.
APPEARS IN
संबंधित प्रश्न
Why it is necessary to balance a chemical equation ?
Balance the following equation:
H2 + O2 → H2O
Write balanced chemical equations for the following word equation:
Calcium oxide + water → Calcium hydroxide
Write your observations and name the product when
Zinc reacts with dilute hydrochloric acid.
Write the balanced equation for the following chemical reaction.
\[\ce{Sodium + Water -> Sodium hydroxide + Hydrogen}\]
Write a balanced molecular equation for the following word equation:
\[\ce{Copper hydroxide + nitric acid->Copper nitrate + water}\]
Balance the following equation:
\[\ce{K + H2O->KOH + H2}\]
Balance the following equation:
\[\ce{ZnS + O2->ZnO + SO2}\]
Underline the incorrectly balanced compound equation and rewrite the correct equation.
\[\ce{4P + 4O2->2P2O5}\]
Underline the incorrectly balanced compound equation and rewrite the correct equation.
\[\ce{2Al + 2H2SO4->Al2(SO4)3 + 3H2}\]
Balance the following important equation:
FeCl3 + NH4OH → NH4Cl + Fe(OH)3
Balance the following important equation:
Na2CO3 + HCl → NaCl + H2O + CO2
Balance the following important equation:
NH3 + Cl2 → HCl + NCl3 [nitrogen trichloride]
Balance the following important equation:
S + HNO3 (conc.) → H2SO4 + H2O + NO2
In a chemical reaction between sulphuric acid and barium chloride solution the white precipitates formed are of:
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
`"Cu"("s") + 2"AgNO"_3("aq") -> "Cu"("NO"_3)_2("aq") + x("s")`
Which among the following change is exothermic or endothermic in nature?
Decomposition of ferrous sulphate
Which among the following change is exothermic or endothermic in nature?
Dissolution of ammonium chloride in water
A solution of potassium chloride when mixed with silver nitrate solution, an insoluble substance is formed. Write the chemical reaction involved and mention the type of the chemical reaction.
