Advertisements
Advertisements
प्रश्न
Write ‘true’ or ‘false’ for the following statement :
Silver is used to make electric cables.
विकल्प
True
False
Advertisements
उत्तर
False
APPEARS IN
संबंधित प्रश्न
State one use of the following metal:
Iron
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
Statements given below are incorrect. Write the correct statements :
Zinc is used for making power transmission wires.
State two important uses of following metal:
Uses of silver
Give the general characteristics of:
Alkali metals,
(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:
Sulphuric acid
Write name.
The nonmetal having electrical conductivity.
Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3
Give a reason why a green deposit is seen on the surface of an article of copper
Name the following:
The chemical compound responsible for the green deposit on the surface of articles of copper.
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.
An amorphous substance which turns from pale green to black on strong heating evolving a colourless, acidic gas as the only gaseous product.
Write scientific reason.
Meena’s mother uses lemon or tamarind for cleaning copper vessels turned greenish.
The most abundant element in the universe is ____________.
Which of the following property is generally not shown by metals?
Name one metal and one non-metal that exist in liquid state at room temperature. Also name two metals having melting point less than 310 K (37°C)
Metals are usually solids or gases at room temperature.
The typical shine of metals is called ______.
Which metals are liquid at room temperature?
Why are metalloids called semimetals?
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.
