Advertisements
Advertisements
Question
Complete and balance the following chemical equations:
N2 + O2 →
Solution
N2 + O2 → 2NO(g)
APPEARS IN
RELATED QUESTIONS
The chemical name of baking soda is ______.
Fill in the blank
A catalyst either ................or ............... the rate of a chemical change but itself remains ............... at the end of the reaction.
FILL IN THE BLANK
Positively charged ions are called ........
TRUE \ FALSE
Temperature at which a liquid starts boiling is known as the boiling point of that liquid. True or false ?
Write true or false .
A black residue is formed when sugar is heated .
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
Explain,giving one example of the following chemical changes:
Reversible reaction
What do you understand by precipitation reaction? Explain with examples.
State the type of reactions for the following represent and balance the ones that are not balanced.
Cl2 + 2KBr → 2KCl + Br2
Define:
Electrochemical reaction
Give one example
Name: Gas with rotten egg smell.
What do you observe when H2S is passed through a lead nitrate solution.
Give a chemical test to distinguish between the following gases.
NH3 and SO2
What do you observe when dilute sulphuric acid is added to the following:
Sodium Sulphide
Distinguish by heating the following in dry test tubs.
Copper Sulphate and copper carbonate
Write your observation and a balanced equation in the case of the following substances being heated.
Copper nitrate.
Distinguish by dilute sulphuric acid.
Sodium Sulphite and sodium carbonate?
Distinguish by dilute sulphuric acid.
Sodium sulphide and sodium sulphite?
Give a word equation for the following reaction.
A salt which reacts with ammonium hydroxide to give a reddish brown precipitate.
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Addition of dilute acid to an active metal.
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
Explain the term chemical reaction with special reference to reactants and products.
Give a balanced equation for the conversion of a soluble lead salt to an insoluble lead salt – formed as a white precipitate.
NPK are the primary nutrients for plants.
Explain the following statement: Digestion is a chemical change.
Which of the following are chemical changes?
(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood
Explain how the painting of an iron gate prevents it from rusting.
Write the characteristics of chemical change.
When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.
Write the effects of chemical reactions.
