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प्रश्न
Name the following:
The chemical compound responsible for the green deposit on the surface of articles of copper.
उत्तर
Copper carbonate (CuCO3)
APPEARS IN
संबंधित प्रश्न
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 ..............
State one use of Copper.
Fill in the following blank with suitable word:
The electrical conductivity and melting point of an alloy is ........... than that of pure metals.
What is an alloy? How is an alloy made?
Give reasons
Graphite is used in the leads of pencils
Write ‘true’ or ‘false’ for the following statement :
Silver is used to make electric cables.
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
______ is a liquid metal.
Write name.
The nonmetal having electrical conductivity.
What was Mendeleev's basis for the classification of elements?
With reference to the following metals state their use in daily life metal:
Magnesium
State why telegraph poles are painted with aluminium paint.
Name the following:
A halogen which is a solid at room temperature.
Which one of the following is an example for a metal?
Compare the properties of metals and nonmetals. Give three examples for each.
Can you store pickle in an aluminium utensil? Give reason.
Give reasons for the following.
- 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.
The most abundant element in the universe is ____________.
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
Metal atoms tend to have a maximum of ______ electrons in the outermost shell.
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the reducing agent.
