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प्रश्न
Fill in the blank
_______ is a soft metal.
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उत्तर
Pure gold is a soft metal.
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संबंधित प्रश्न
Which property of ‘solder’ alloy makes it suitable for welding electrical wires?
Which of the following alloys contains mercury as one of the constituents?
State the position of the following in the periodic table:
Alkali metals
Give the general characteristics of:
Alkaline earth metals with reference to
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
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Write scientific reason.
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copper
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An amorphous substance which turns from pale green to black on strong heating evolving a colourless, acidic gas as the only gaseous product.
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Write the name.
Two highly reactive metals-
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- Aluminum foils are used to wrap food items.
- Immersion rods for heating liquids are made up of metallic substances.
- Sodium and potassium are stored in kerosene.
- Mercury is used in thermometers.
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| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
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- is the best conductor of heat.
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| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
