Advertisements
Advertisements
प्रश्न
Give reason for the following:
The catalytic oxidation of sulphur dioxide to sulphur trioxide is represented by a double arrow {⇌}
between the reactants and products, formed in the chemical reaction.
Advertisements
उत्तर
The reaction is reversible shown by the double arrow.
The Equation of Oxidation of sulphur dioxide to sulphur trioxide is as follows:
\[\ce{2SO2 + O2 ⇌[V2O5][450°C] 2 SO3 + \triangle}\]
[Vanadium pentoxide (V2O5) - catalyst]
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equations:
`"H"_2"S"` + `"CI"_2` `→`
Write the missing reactants and products and balance the equations.
NaOH + ............... `→` NaCI + ...................
What do you observe when iron nail is kept in copper sulphate solution for sometime.
FILL IN THE BLANK
Positively charged ions are called ........
Write true or false :
Hydrogen sulphide has rotten egg smell .
A solution of a substance ‘X’ is used for white washing Name the substance ‘X’ and write its formula.
Choose the correct option from the bracket and explain the statement giving a reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
Addition of an aqueous solution of ZnSO4 to an aqueous solution of BaCl2 is an example of ______ reaction.
Define an electrochemical reaction.
State the original colour of the following substance and colour of residue obtained after heating.
Copper carbonate
Select the correct answer for the following options:
The gas obtained when potassium chlorate is heated in the presence of a catalyst.
Limestone contains ______ mainly.
Silver metal can displace hydrogen gas from nitric acid.
Anaerobic bacteria digest animal waste and produce biogas (Change – A). The biogas is then burnt as fuel (Change – B). The following statements pertain to these changes. Choose the correct one.
Arrange the following statements in correct sequence:
- One side is water-loving and other water-hating molecules.
- When you agitate the cloth, the dirt is surrounded by many molecules and taken away from the cloth.
- The dirt surrounded by the detergent molecules floats in the water making it dirty.
- Finally, the cloth is clean.
- The detergent molecules have two sides.
- Water hating goes and joins with dirt and oil in the cloth while the water-loving joins with the water molecules.
Classify each of the following, as a physical or a chemical change. Give reasons.
(a) Drying of a shirt in the sun.
(b) Rising of hot air over a radiator.
(c) Burning of kerosene in a lantern.
(d) Change the colour of black tea by adding lemon juice to it.
(e) Churning of milk cream to get butter.
Write word equations for two chemical reactions with the help of materials given in the box.
| Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water |
Give two examples for the following case:
Chemical changes
Rusting of iron is ______.
Iron and rust are the same substances.
How can we prevent rusting?
