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प्रश्न
Classify the following as physical or chemical properties
Most metal oxides form alkalis on interacting with water.
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उत्तर
Chemical property
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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.
What is observed in performing the following :
| Hydrogen | Oxygen | Carbon dioxide | Chlorine | |
| Litmus test | ||||
| Apply a burning splint to the gas | ||||
| Colour of gas | colourless | colourless | colourless | greenish-yellow |
| Odour of gas |
State the original colour of the following substance and colour of residue obtained after heating.
Ammonium dichromate
State the following reaction represent oxidation or reduction.
\[\ce{Cu++->Cu}\]
Explain the following statement: Digestion is a chemical change.
Which of the following is not an “element + element → compound” type reaction?
Can a nickel spatula be used to stir copper sulphate solution? Justify your answer.
Beating an egg to make a cake is a ______.
The chemical formula of rust is ______.
Write five changes in the characteristics of a substance that can take place during a chemical change.
