Advertisements
Advertisements
प्रश्न
Complete and balance the following reaction:
\[\ce{Pb(NO3)2 ->[\Delta]}\]
Advertisements
उत्तर
\[\ce{Pb(NO3)2 ->[\Delta] 2PbO + 4NO2 + O2}\]
APPEARS IN
संबंधित प्रश्न
Changes in which new substances are formed are called ______ changes.
What do you observe when :
an iron nail is kept in tap water for few days
Balance the following equation :
Fe + H2O → Fe3O4 + H2
State what you would observe when the following substance is heated in a glass test tube Copper (II) carbonate Red lead .
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
A colourless solution of calcium hydroxide in a test tube turns ______ on blowing in it through a blow tube for some time.
Explain by writing a word equation.
Hard water gets softened on mixing with a solution of washing soda.
Give an example of the following chemical change.
Two solids combine to form a liquid
Give a word equation for the following reaction.
A salt which reacts with ammonium hydroxide to give a reddish brown precipitate.
Explain the term chemical reaction with special reference to reactants and products.
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.
