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What happens when cane sugar is strongly heated? Mention any two changes in it. - Science

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प्रश्न

What happens when cane sugar is strongly heated? Mention any two changes in it.

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उत्तर

  1. Sugar is basically Sucrose.
  2. The molecular formula of Sugar is C12 H22O11 (or) C12(H2O)11.
  3. When sugar is heated, it loses all water molecules and decomposes to carbon.
  4. Chemical change;
  5. Irreversible change
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अध्याय 3: Changes Around Us - Evaluation [पृष्ठ ४०]

APPEARS IN

सामाचीर कलवी Science - Term 2 [English] Class 6 TN Board
अध्याय 3 Changes Around Us
Evaluation | Q VI. 4. | पृष्ठ ४०

संबंधित प्रश्न

MULTIPLE CHOICE QUESTIONS

Tick the most appropriate answer.

 Which one of the following alters the rate of the chemical reaction without itself undergoing any change?

  1. temperature and Pressure
  2. concentration of reactants
  3. presence of catalyst
  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

Write a short note on the information derived from a balanced chemical equation.


 Fill in the blank

A new substance is formed in a _______ change.


Write true or false :

When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet .


Write balanced chemical equations for the reactions represented by word equations in the conditions for chemical reaction.


State what you would observe when the following substance is heated in a glass test tube Copper (II) carbonate Red lead .


Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition) 

The conversion of ferrous sulphate to ferric sulphate is ______ reaction. 


Give reason for the following:

Silver nitrate solution is kept in coloured bottles.


Explain the Silver nitrate solution is kept in coloured reagent bottles in the laboratory.


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

Zinc carbonate.


Assertion: The formation of iron oxide from iron is a chemical change.

Reason: For the rust to form from iron, it must be exposed to air and water.


________ is a chemical substance which alters the speed of a chemical reaction.


Silver metal can displace hydrogen gas from nitric acid.


Chemists identify gypsum as a natural indicator.


What is the use of indicator?


Which of the following is a chemical change?


A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.

Write a word equation for the chemical change, if any.


Magnesium + oxygen → magnesium oxide.

2Mg + O2 → 2Mg O


Is the conversion of milk into ice cream a chemical change?


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