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प्रश्न
Multiple choice:
Thermal decomposition of sodium carbonate will produce
विकल्प
Carbon dioxide
Oxygen
Sodium hydroxide
No other product
उत्तर
Carbon dioxide
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equations:
Zn + `"H"_2"SO"_4` `→`
(dil)
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction reaction is the exact opposite of
- displacement reaction
- decomposition reaction
- oxidation reaction
- none of these
Name the type of chemical reaction shown by the following equation:
NaOH + HCl → NaCl + H2O
State the conditions necessary for a chemical change or reaction.
Give an example of a reaction where the following are involved:
Solution
Give an example of the following chemical change.
Two solids combine to form a liquid
What do you observe? When
Barium chloride is added to sodium sulphate solution
Give a chemical test to distinguish between the following gases.
H2 and O2
Represent the addition of dilute sulphuric acid to zinc by means of a chemical equation. State the function of the arrow between the reactants and products.
Give examples of exothermic reactions i.e. heat evolved in each of the following:
(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.
Select the correct answer for the following options:
The basic gas obtained when two gases react in presence of a catalyst and the reaction is exothermic.
Give a word equation for the following reaction.
An exothermic reaction where both the reactants are gases, one of which is oxygen.
Explain the term chemical reaction with special reference to reactants and products.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Lead nitrate.
______ gas causes tears in our eyes while cutting onions.
Higher order Thinking question
A very hot glass on putting in cold water cracks. What does this change indicate?
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think the formation of rust from iron is a chemical change?
Beating an egg to make a cake is a ______.
Vanaspati is obtained from vegetable oils by the addition of ______ to the oils.
How can we prevent rusting?
