Choose the Correct Alternative and Rewrite the Following: Reaction of Iron Nails Whith Copper Sulphate Solution is an Example of _____________________ - Science and Technology 2

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Choose the correct alternative and rewrite the following:

Reaction of iron nails whith copper sulphate solution is an example of _____________________


  • combination reaction

  • decomposition reaction

  • displacement reaction

  • double displacement reaction.



displacement reaction

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2014-2015 (July)



.................... 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

Metal A has electronic configuration (2, 8, 1) and metal B has (2, 8, 8, 2). Which is more reactive? Why? Identify these metals.

_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3

Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium

Name the following:
Metals which forms an amphoteric oxide.

Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).

The solution of Aluminium sulphate in water is .....................

(a) Green

(b) Colourless

(c) Pink

(d) Blue

The reaction of an iron nail with copper sulphate solution is ........... reaction.

(a) Combination

(b) Displacement

(c) Double displacement

(d) Decomposition

A solution of _________________ in water is green in colour.

(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3

Explain the following reaction with the help of a balanced chemical equation:
Magnesium reacts with hot water.

What will happen if a strip of copper is kept immersed in a solution of silver nitrate (AgNO3)?

Complete and balance the following equation:

Fill in the following blank with suitable word:

The white powder formed when magnesium ribbon burns in oxygen is of ....................

What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place

The elements whose oxides can turn phenolphthalein solution pink are:
(a) Na and K
(b) K and C
(c) Na and S
(d) K and P

Zinc oxide is a metal oxide. Which of the following term best describes the nature of zinc oxide:
(a) an acidic oxide
(b) a basic oxide
(c) an amphoteric oxide
(d) a neutral oxide

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?

In nature, metal A is found in a free state while metal B is found in the form of its compounds. Which of these two will be nearer to the top of the activity series of metals?

Name a metal which It does not react with any physical state of water?

Calcium floats over water during the reaction with water. Give reason.  

Write the chemical equation of the above process.

Answer the following question:
An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is metal or a non - metal. Explain with a proper example. 

Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?

Which of the following property is not responsible for copper to be used as electrical conduction wires?

Find the odd one out:

Tungsten wire is used in electric bulbs.


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