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प्रश्न
A metal with melting point less than 50°C is
पर्याय
Gallium
Iron
Gold
Aluminium
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उत्तर
Gallium
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संबंधित प्रश्न
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Generally, non-metals react with acids. ( )
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Sodium is a very reactive metal. ( )
Fill in the following blanks with suitable words:
A metal having low melting point is ..................... but a non-metal having very high melting point is ..............
How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?
State two important uses of following metal:
Uses of gold
State the position of the following in the periodic table:
Alkali metals
State the position of the following in the periodic table:
Iron and zinc
Write scientific reason.
Sodium is always kept in kerosene.
With reference to the following metals state their use in daily life metal:
copper
Name the following:
A metal used in packaging.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A white crystalline solid which decrepitates on heating leaving a residue which fuses with the glass and evolves two gases one of which is coloured and acidic.
When a copper coin is dipped in the solution of silver nitrate, it shows a lustre on its surface. Explain this process with the help of a chemical equation.
Assertion: Mercury is solid in room temperature.
Reason: Mercury is a non-metal.
Which of the following property is generally not shown by metals?
The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?
The typical shine of metals is called ______.
Sodium is a hard metal.
Match the following
| i. | Silica | a. | Caustic potash |
| ii. | Potassium hydroxide | b. | Sand |
| iii. | Sodium hydroxide | c. | Calamine |
| iv. | Zinc carbonate | d. | Caustic soda |
