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प्रश्न
Name the following:
The most reactive halogen.
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उत्तर
Fluorine
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संबंधित प्रश्न
Fill in the blanks:
Metals react with acids to produce _________ gas.
What is an amalgam?
Fill in the following blank with suitable word:
The alloy in which one of the metals is mercury is called an ...............
Which of the following alloys contains mercury as one of the constituents?
(a) stainless steel
(b) solder
(c) duralumin
(d) zinc amalgam
A metal which is neither ductile nor malleable is
State two important uses of following metal
Uses of lead
Write scientific reason.
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Write scientific reason.
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Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3
State the position of the following in the periodic table:
Halogens
With reference to the following metals state their use in daily life metal:
Zinc
With reference to the following metals state their use in daily life metal:
Lead
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Write scientific reason.
Meena’s mother uses lemon or tamarind for cleaning copper vessels turned greenish.
The metal which is liquid at room temperature is ______.
Assertion: Mercury is solid in room temperature.
Reason: Mercury is a non-metal.
The most abundant metal in the earth’s crust is ____________.
Silver and copper are very good conductors of electricity.
Match the following
| i. | Silica | a. | Caustic potash |
| ii. | Potassium hydroxide | b. | Sand |
| iii. | Sodium hydroxide | c. | Calamine |
| iv. | Zinc carbonate | d. | Caustic soda |
