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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
State one use of Mercury.
For the reduction of metal oxide, suggest a reducing agent other than carbon.
Which of the following alloys contains mercury as one of the constituents?
(a) stainless steel
(b) solder
(c) duralumin
(d) zinc amalgam
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
Write name.
Alloy of sodium with mercury.
Write name.
The nonmetal having electrical conductivity.
Write scientific reason.
Sodium is always kept in kerosene.
Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3
Give reasons for the following:
Most metals conduct electricity well.
With reference to the following metals state their use in daily life metal:
copper
Name the following:
The most reactive halogen.
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.
Complete the following flowchart.
Assertion: Mercury is solid in room temperature.
Reason: Mercury is a non-metal.
Can you store pickle in an aluminium utensil? Give reason.
Why are bells made of metals?
Match the following
| i. | Silica | a. | Caustic potash |
| ii. | Potassium hydroxide | b. | Sand |
| iii. | Sodium hydroxide | c. | Calamine |
| iv. | Zinc carbonate | d. | Caustic soda |
Why do metals appear shiny?
Compare the conductivity of metals and non–metals.
