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तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएस.एस.एल.सी. (इंग्रजी माध्यम) इयत्ता ६

What kind of a change is associated with decaying of a plants?

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प्रश्न

What kind of a change is associated with decaying of a plants?

एका वाक्यात उत्तर
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उत्तर

Decaying plants is associated with slow change and chemical change.

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पाठ 3: Changes Around Us - Evaluation [पृष्ठ ४०]

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सामाचीर कलवी Science - Term 2 [English] Class 6 TN Board
पाठ 3 Changes Around Us
Evaluation | Q VI. 1. | पृष्ठ ४०

संबंधित प्रश्‍न

Define catalyst.


TRUE \ FALSE

Weak electrolytes dissociate partially in their aqueous or fused state.


What are the characteristics of a chemical reaction ? A chemical reaction is characterised by an irreversible change in which a new substance is formed.


 Fill in the blank

A new substance is formed in a _______ change.


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)

The white particles of baking soda disappear when put in lemon juice. This means that it is a ______ change.


Explain by writing a word equation.

Respiration is a chemical change. 


Give an example of a reaction where the following are involved

Catalyst


Give an example of a photochemical reaction.


Distinguish by heating the following in dry test tubs.

Zinc carbonate, Copper carbonate and lead carbonate.


Give reason for the following:

Even though rusting is an exothermic reaction, the heat evolved when an iron nail rusts is unnoticeable.


Complete the table given below.

Heat on  copper carbonate Test for gas evolved  

Complete the table given below.

Heat on sodium chloride Colour imparted to flame during flame test  

State the following reaction represent oxidation or reduction.

\[\ce{Fe++->Fe+++}\]


Explain the term chemical reaction with special reference to reactants and products.


Can a nickel spatula be used to stir copper sulphate solution? Justify your answer.


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.


Galvanization is a process in which ______ is coated as a layer of iron.


Write five changes in the characteristics of a substance that can take place during a chemical change. 


Assertion (A): Cutting paper into very small pieces is an irreversible change.
Reason (R): Physical changes are always reversible.


When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.


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