Advertisements
Advertisements
प्रश्न
Complete and balance the following reaction:
\[\ce{Pb(NO3)2 ->[\Delta]}\]
उत्तर
\[\ce{Pb(NO3)2 ->[\Delta] 2PbO + 4NO2 + O2}\]
APPEARS IN
संबंधित प्रश्न
How do the following help in bringing about a chemical change?
pressure.
What are (i) positive catalysts and (ii) negative catalysts? Support your answer with one example for each of them.
Complete and balance the following chemical equations:
N2 + O2 →
Fill in the blank.
The formation of gas bubbles in a liquid during a reaction is called ......................
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Which one of the following alters the rate of the chemical reaction without itself undergoing any change?
- temperature and Pressure
- concentration of reactants
- presence of catalyst
- none of these
Define chemical reaction.
Write true or false :
Hydrogen sulphide has rotten egg smell .
A solution of a substance ‘X’ is used for white washing write the reaction of the substance ‘X’ named in (a) above with water.
State the conditions necessary for a chemical change or reaction.
State the type of reactions for the following represent and balance the ones that are not balanced.
NaOH + HCl → NaCl + H2O
Multiple choice:
A reaction of a type: AB + CD → AD + CD, involves
What do you observe? When
Water is added to the quick lime.
Complete and balance the following reaction:
\[\ce{NH3 + O2 ->[\Delta]}\]
State the original colour of the following substance and colour of residue obtained after heating.
Zinc carbonate
Distinguish by dilute sulphuric acid.
Sodium Sulphite and sodium carbonate?
Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to calcium carbonate.
______ occurs in the absence of air and in the presence of micro-organisms such as yeast.
Write the equation for the process of formation of rust.
Write a note on the catalyst.
