Advertisements
Advertisements
Question
Fill in the following blank with suitable word:
Magnesium liberates ............... gas on reacting with hot boiling water.
Advertisements
Solution
Magnesium liberates hydrogen gas on reacting with hot boiling water.
APPEARS IN
RELATED QUESTIONS
.................... liberated when acetic acid reacts with sodium metal.
(a) Hydrogen
(b) Chlorine
(c) Oxygen
(d) Nitrogen
A solution of CuSO4 in water is .................... in colour.
(a) Pink
(b) Blue
(c) Colourless
(d) Green
Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium
Show the formation of Na2O by the transfer of electrons.
What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution for about 30 minutes?
What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved.
What happens when a rod of zinc metal is dipped into a solution of copper sulphate? Give chemical equation of the reaction involved.
You are given samples of three metals − sodium, magnesium and copper. Suggest any two activities to arrange them in order of their decreasing reactivities.
What happens when calcium reacts with water? Write the chemical equation of the reaction of calcium with water.
Out of the following oxides, the amphoteric oxide is:
(a) Fe2O3
(b) Al2O3
(c) P2O5
(d) N2O
The metals which can produce amphoteric oxides are:
(a) sodium and aluminium
(b) zinc and potassium
(c) calcium and sodium
(d) aluminium and zinc
Which of the following pair of reactants can undergo a displacement reaction under appropriate conditions?
(a) MgSO4 + Fe
(b) ZnSO4 + Fe
(c) MgSO4 + Pb
(d) CuSO4 + Fe
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?
Which of the following reactions will not occur? Why not?
(a) MgSO4 (aq) + Cu (s) → CuSO4 (aq) + Mg (s)
(b) CuSO4 (aq) + Fe (s) → FeSO4 (aq) + Cu (s)
(c) MgSO4 (aq) + Fe (s) → FeSO4 (aq) + Mg (s)
Name a metal which It does not react with any physical state of water?
What is the characteristic of the electronic configuration of noble gases?
Choose the correct alternative and rewrite the following:
Which of the following is lue in colour?
Write the chemical equation for the following reaction:
Manganese dioxide is heated with aluminum powder.
Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?
Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
