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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ८

Discuss how acid rain occurs due to emission of smoke from vehicles and industries? - Science

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प्रश्न

Discuss how acid rain occurs due to emission of smoke from vehicles and industries?

टिप्पणी लिखिए

उत्तर

  1. Rain becomes acidic in nature due to the presence of certain pollutants in the air released by cars and industrial processes.
  2. Acid rain is caused by emissions of sulphur dioxide and nitrogen oxide which react with the water molecules in the atmosphere.
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अध्याय 10: Changes around us - Exercises [पृष्ठ ११२]

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सामाचीर कलवी Science [English] Class 8 TN Board
अध्याय 10 Changes around us
Exercises | Q VII. 3. | पृष्ठ ११२

संबंधित प्रश्न

MULTIPLE CHOICE QUESTIONS

Tick the most appropriate answer.

Reduction reaction is the exact opposite of

  1. displacement reaction
  2. decomposition reaction
  3. oxidation reaction
  4. none of these

MULTIPLE CHOICE QUESTIONS

Tick the most appropriate answer.

 

Miscible liquids having slightly different boiling points can be separated by the

  1. evaporation
  2. distillation
  3. fractional distillation
  4. sedimentation

Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.

(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)

A colourless solution of calcium hydroxide in a test tube turns ______ on blowing in it through a blow tube for some time.


Give an example of a reaction where the following are involved

Light


Explain,giving one example of the following chemical changes:

Reversible reaction


Give an example of the following chemical changes.

A reaction where colour change is noticed.


Differentiate between the following:

Neutralization reaction and a precipitation reaction.


Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.

Zinc carbonate.


On heating calcium carbonate gets converted into calcium oxide and carbon dioxide.

(a) Is this a physical or a chemical change?

(b) Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.


Iron benches kept in lawns and gardens get____________. It is a _________ change because a new _________ is formed.


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