Advertisements
Advertisements
प्रश्न
Which of the following gases can be used for storage of fresh sample of an oil for a long time?
पर्याय
Carbon dioxide or oxygen
Nitrogen or oxygen
Carbon dioxide or helium
Helium or nitrogen
Advertisements
उत्तर
Helium or nitrogen
Explanation -
Both helium (He) and nitrogen (N2) can be used. In their presence, rancidity of fresh sample of an oil will not take place.
APPEARS IN
संबंधित प्रश्न
Write the balanced equation for the following chemical reaction.
\[\ce{Hydrogen + Chlorine -> Hydrogen chloride}\]
What is a chemical equation ?
Differentiate between:
A balanced and an unbalanced chemical equation.
Balance the following equation:
Na2O + H2O → NaOH
Write a balanced chemical equation for the following word equation:
Iron + Chlorine → Iron (III) chloride
Balance the following equations Also name the products formed.
`K+CI_2→ KCI`
Write balanced chemical equation for the following word equation:
Magnesium + dil. sulphuric acid → Magnesium sulphate + hydrogen
Balance the following equation:
\[\ce{CaO + HCl->CaCl2 + H2O}\]
Balance the following equation:
\[\ce{C + H2SO4->CO2 + H2O + SO2}\]
Balance the following equation:
\[\ce{Fe2O3 + CO->Fe + CO2}\]
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:
Fe + HCl → FeCl2 + H2
Balance the following important equation:
KMnO4 + HCl → KCl + MnCl2 + H2O + Cl2
Balance the following important equation:
\[\ce{NH4Cl + Ca(OH)2 → CaCl2 + H2O + NH3}\]
Balance the following important equation:
C + H2SO4 (conc.) → CO2 + H2O + SO2
Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?
- Displacement reaction
- Precipitation reaction
- Combination reaction
- Double displacement reaction
Which of the following is(are) an endothermic process(es)?
- Dilution of sulphuric acid
- Sublimation of dry ice
- Condensation of water vapours
- Evaporation of water
Which one of the following processes involve chemical reactions?
A magnesium ribbon is burnt in oxygen to give a white compound ‘X’ accompanied by emission of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound ‘Y’.
- Write the chemical formulae of X and Y.
- Write a balanced chemical equations when X and Y are dissolved in water.
