Advertisements
Advertisements
प्रश्न
Show the formation of Na2O by the transfer of electrons.
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
‘E’ is an element which reacts with oxygen to form an oxide E2O. An aqueous solution of E2O turns red litmus blue, so:
i. What is the nature of oxide E2O ?
ii. Write the name of element ‘E’.
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:
Food cans are coated with tin and not with zinc because ______.
Explain the following reaction with the help of a balanced chemical equation:
Magnesium reacts with hot water.
Give reason for the following:
Blue colour of copper sulphate solution is destroyed when iron filings are added to it.
Complete and balance the following equation:
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
Name two metals which cannot displace hydrogen from dilute acids.
What is the action of water on aluminium ? Write equation of the chemical reaction involved.
What special name is given to substances like aluminium oxide.
Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?
Write the equation for the reaction of Iron with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
A basic oxide will be formed by the element:
(a) K
(b) S
(c) P
(d) Kr
Out of aluminium, copper, calcium and tin, the most reactive metal is:
(a) aluminium
(b) copper
(c) tin
(d) calcium
The least reactive metal among the following is:
(a) sodium
(b) silver
(c) copper
(d) lead
An element X forms two oxides XO and XO2. The oxide XO is neutral but XO2 is acidic in nature. The element X is most likely to be:
(a) sulphur
(b) carbon
(c) calcium
(d) hydrogen
The elements whose oxides can turn litmus solution red are:
(a) lithium and sodium
(b) copper and potassium
(c) carbon and hydrogen
(d) phosphorus and sulphur
Name a metal which It does not react with any physical state of water?
Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.
Find the odd one out:
