Write the Chemical Equation of the Above Process. - Science and Technology 2

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Write the chemical equation of the above process.



The reaction of photosynthesis is given

\[\ce{carbon dioxide + water + light energy -> carbohydrate + oxygen}\]

The chemical equation is given as

\[\ce{6CO2 + 6H2O -> C6H12O6 +6O2}\]
Sunlight energy

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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

Why is sodium kept immersed in kerosene oil?

Write equations for the reactions of iron with steam 

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.

Name the metal which has been placed at the bottom of the reactivity series.

What will happen if a strip of zinc is immersed in a solution of copper sulphate?

With the help of examples, describe how metal oxides differ from non-metal oxides.

You are given samples of three metals − sodium, magnesium and copper. Suggest any two activities to arrange them in order of their decreasing reactivities.

Write one reaction in which aluminium oxide behaves as a basic oxide and another in which it behaves as an acidic oxide.

When calcium metal is added to water, the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?

What are noble gases

Choose the correct alternative and rewrite the following:

Which of the following is lue in colour?

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

Rewrite the following statement by selecting the correct option.
A solution of Al2(SO4)3 in water is _____________.

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. 

Write the chemical equation for the following reaction:
Manganese dioxide is heated with aluminum powder.

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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