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प्रश्न
Name: Two carbonates do not produce carbon dioxide on heating.
उत्तर
Na2CO3 and K2CO3
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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
Positively charged ions are called ........
TRUE \ FALSE
Ammonia is a good oxidizing agent.
Explain the type of reactions on the basis of the direction of reaction.
Fill in the blank.
Melting of ice is a _______ change.
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)
An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.
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)
The spoiling of food is a chemical change which is recognized from the generation of certain ______ due to it.
Define:
Electrochemical reaction
Give one example
Distinguish by dilute sulphuric acid.
Copper and magnesium?
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
Give a word equation for the following reaction.
A salt which reacts with ammonium hydroxide to give a reddish brown precipitate.
Complete the table given below.
| Addition of dil. H2SO4 to FeS | Odour of gas evolved |
Complete the table given below.
| Addition of dil. H2SO4 to zinc | Test for gas evolved |
State the following reaction represent oxidation or reduction.
\[\ce{Al->Al+++}\]
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
Photosynthesis is a chemical reaction that takes place in the presence of ______.
Silver articles turning black: ______:: Boiling of H2O: physical change ______.
On heating calcium carbonate gets converted into calcium oxide and carbon dioxide.
(a) Is this a physical or a chemical change?
(b) Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.
The chemical formula of rust is ______.
The chemical name of baking soda is sodium bicarbonate.
