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प्रश्न
Select the correct answer from the options given below:
State the gaseous product formed, when
An active metal reacts with dilute sulphuric acid.
पर्याय
Ammonia
Hydrogen chloride
Hydrogen
Nitrogen dioxide
Nitric oxide
उत्तर
Hydrogen
APPEARS IN
संबंधित प्रश्न
The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder, it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change − A), then it burns (Change − B). The following statements pertain to these changes. Choose the correct one.
Fill in the blank.
The formation of gas bubbles in a liquid during a reaction is called ......................
FILL IN THE BLANK
Negatively charged ions are called ..........
Define electrolysis.
Fill in the blank:
The substances formed as a result of a chemical reaction are called _______
Write true or false :
When potassium iodide solution is added to lead acetate solution a red precipitate is formed.
Name the type of chemical reaction shown by the following equation:
CaCO3 → CaO + CO2
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
To prevent rusting, a layer of ______ metal is applied on iron sheets.
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)
Electron ______ is complete in each hydrogen in a hydrogen molecule.
Name Affects the acidified K2Cr2O7 paper and also turns lime water dirty milky.
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium dichromate.
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
Complete the table given below.
| Heat on iodine crystals | Colour of vapours evolved |
Complete the table given below.
| Heat on sodium chloride | Colour imparted to flame during flame test |
What happens when cane sugar is strongly heated? Mention any two changes in it.
Burning of paper is the best example of ______ change.
Chemical changes are important in our day-to-day life. Give examples.
Photosynthesis is a chemical charge. Justify your answer.
The reaction of H2 gas with oxygen gas to form water is an example of ______.
