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when a mixture of iron powder and su...

when a mixture of iron powder and sulphur powder is heated strongly to form iron sulphide , then heat energy is :

A

released

B

first absorbed and then released

C

absorbed

D

neither absorbed nor released

Text Solution

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The correct Answer is:
( b)
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LAKHMIR SINGH & MANJIT KAUR-IS MATTER AROUND US PURE -Exercise
  1. which one of the following is not a metalloid?

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  2. the element which normally exist in the liquid state are :

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  3. when a mixture of iron powder and sulphur powder is heated stro...

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  4. The property / properties which enable copper metal to be used for m...

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  5. On the basis of composition of matter, milk is considered to be :

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  6. Which of the the following statements are true for pure substan...

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  7. Which of the following are homogeneous in nature? (i) Ice (ii) Wo...

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  8. Two chemical species X and Y combine together to form a product P whic...

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  9. which of the following does not a fixed melting point/ boiling p...

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  10. in the following set of substance , one item does not belong ...

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  11. Iron powder and sulphur powder were mixed together were mixed ...

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  12. there are three substance X,Y and Z , the substance X, does no...

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  13. there is a large group of materials P which all the divided i...

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  14. A,B and C are all liquid ,Liquid A has a comparatively low boiling ...

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  15. out of a colloid , solution and a suspension : (a) which one...

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  16. what is the name of the clear liquid formed when a solid dissolv...

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  17. which of the two will scatter light : soap solution or sugar sol...

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  18. state whether colloidal solutions are homogeneous or heterogeneous ...

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  19. what is the most common way of expressing the concentration of a...

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  20. how much water should be added to 15 grams of salt to obtain 15...

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