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प्रश्न
Fill in the following blanks with suitable words :
Brass is an alloy which is considered a ..............
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उत्तर
Brass is an alloy, which is considered as mixture.
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संबंधित प्रश्न
The inter-molecular force is maximum in
Give one difference between atoms and molecules.
Define matter. Give four examples of matter.
State any two properties for believing that aluminium is a metal.
State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.
Name a metal which is yellow in colour.
Classify the following into metals, non-metals and metalloids:
Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium
Choose one term from the following which includes the other three :
aerosol, emulsion, colloid, sol
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
Which of the following are chemical changes and which physical ? Give reason.
- a glass bottle breaking
- coal burning in air
- making a cake
- wool being knitted into a sweater
What is the effect of temperature on the solubility of solids in liquids ?
The solubility of ammonium chloride in water at various temperatures is given below :
| Temperature | : | 10°C | 20°C | 40°C | 60°C | 80°C |
| Solubility | : | 24 g | 37 g | 41 g | 55 g | 66 g |
What mass of ammonium chloride would be needed to make a saturated solution of ammonium chloride in fifty grams of water at 40°C ?
Describe the method of separating a mixture containing common salt, sand and ammonium chloride.
Asmita went to buy an earthen pot. There she saw many things kept for sale.
What is the difference between a substance and an object?
Define the term matter.
Solids possess very high kinetic energy.
Complete the following table:
| S.No. | CELSIUS | KELVIN |
| 1. | 90°C | 363 K |
| 2. | ______ | 283 K |
| 3. | 63 °C | ______ |
| 4. | 250°C | ______ |
| 5. | ______ | 303 K |
Which statement is not correct for a mixture
Define the term matter.
Define the term matter.
