Advertisements
Advertisements
Question
Show the formation of Na2O by the transfer of electrons.
Advertisements
Solution
APPEARS IN
RELATED QUESTIONS
Write equations for the reactions of calcium and potassium with water.
Write the electron-dot structures for sodium, oxygen and magnesium.
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
Why are metals called electropositive elements whereas non-metals are called electronegative elements?
From amongst the metals sodium, calcium aluminium, copper and magnesium, name the metal:
(i) which reacts with water only on boiling, and
(ii) another which does not react even with steam.
What will happen if a strip of copper is kept immersed in a solution of silver nitrate (AgNO3)?
Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
Name two metals which cannot displace hydrogen from dilute acids.
Describe the reaction of potassium with water. Write the equation of the reaction involved.
Name one metal more reactive and another less reactive than hydrogen.
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
Which one of the following four metals would be displaced from the solution of its salt by the other three metals?
(a) Zn
(b) Ag
(c) Cu
(d) Mg
An element E forms an oxide E2O. An aqueous solution of E2O turns red litmus paper blue.
(a) What is the nature of the oxide E2O?
(b) State whether element E is a metal or a non-metal.
(c) Give one example of an element like E.
An element X forms two oxides XO and XO2. The oxide XO has no action on litmus solution but oxide XO2 turns litmus solution red.
(a) What is the nature of oxide XO?
(b) What is the nature of oxide XO2?
(c) Would you call element X a metal or a non-metal? Give reason for your choice.
(d) Can you give an example of element like X?
Choose the correct alternative and rewrite the following:
Reaction of iron nails whith copper sulphate solution is an example of _____________________
Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?
An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following.
Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
