Advertisements
Advertisements
प्रश्न
X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ______.
(b) If X is a non-metal, then the litmus will turn ______.
(c) If X is a reactive metal, then ______ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non -metal, it will form _ oxide, which will form ______ solution with water.
(e) If X is a non -metal, it will not conduct electricity unless it is carbon in the form of ______.
उत्तर
(a) If X is a metal, then the litmus will turn blue.
(b) If X is a non-metal, then the litmus will turn Red.
(c) If X is a reactive metal, then Hydrogen will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non -metal, it will form acidic oxide, which will form acidic solution with water.
(e) If X is a non -metal, it will not conduct electricity unless it is carbon in the form of graphite.
APPEARS IN
संबंधित प्रश्न
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
Define the term ore.
How is aluminium metal extracted? Explain with the help of an equation.
An element has its electron configuration as 2,8,8,2. Now answer the following questions.
a) What is the atomic number of this element?
b) What is the group of this element?
c) To which period does this element belong?
Name the following:
The mixture of materials fed into a furnace to extract a metal.
To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
State three objectives achieved during the roasting of ores.
Write the name.
The process of strong heating of carbonate ores in insufficient air–
During extraction of metals, electolytic refining is used to obtain pure metals.
(a) Which material will be used as anode and cathode for refining of silver metal by this process?
(b) Suggest a suitable electrolyte also.
(c) In this electrolytic cell, where do we get pure silver after passing electric current?
