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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Complete and balance the following equation CaO + H2O →

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प्रश्न

Complete and balance the following equation

CaO    +    H2O    →

एक पंक्ति में उत्तर
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उत्तर

CaO    +    H2O    →   Ca(OH)2

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अध्याय 7: Air and Atmosphere - Additional questions 3

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सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 7 Air and Atmosphere
Additional questions 3 | Q 11.6

संबंधित प्रश्न

Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium

_______ gas is used for filling weather observation balloons.


Statement given below is incorrect. Write the correct statement :

Symbiotic bacteria are present in nodules of cereal plants such as wheat.


State the full form of LPG and CNG? How are the two different in their composition?


Fill in the blanks

Oxygen is used in ___________the food to get _______.


Name three different appliances where air is utilized.


Match the statements in List 1 with the correct answers in List 2

List 1 List 2
1 An impurity in air A Water vapour
2 The component of air which supports combustion B Respiration
3 The inert component in the air slightly soluble in water C Rare gases
4 The component of air which minimizes the rate of evaporation D Sulphur dioxide
5 The process which involves oxidation of food substance in living organisms E Helium
6 The component of air which finds application in observation balloons F Carbon dioxide
7 The process which involves oxidation of substances, liberating heat and light energy G Combustion
8 The component of air which is heavier than air and fairly soluble in water H Nitrogen
9 The process by which atmospheric carbon dioxide is absorbed by plants resulting in the formation of carbohydrates I Photosynthesis
10 The component of air which is lighter than air and less than 1% in air J Oxygen

Name the following:

The active component of air which supports combustion and is used up in burning


List out the uses of carbon dioxide.


Metals like magnesium, iron, and sodium burn in oxygen and give basic ______.


Make sentences using the given set of words.

99%, oxygen, nitrogen, air, together


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