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The substances which allow the passage o...

The substances which allow the passage of electricity through them…..

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Read the given passage and answer the questions A substance which alters the rate of chemical reaction without undergoing any change in mass and chemical composition at the end of reaction is called catalyst. It may be noted that catalyst which increases the speed of a reaction is called positive catalyst and catalyst which decrease the speed of reaction is called negative catalyst. The promoters are substances that enhance the activity of catalyst and poisons are the substances which decrease the activity of catalyts. What are poisons ?

Read the given passage and answer the questions A substance which alters the rate of chemical reaction without undergoing any change in mass and chemical composition at the end of reaction is called catalyst. It may be noted that catalyst which increases the speed of a reaction is called positive catalyst and catalyst which decrease the speed of reaction is called negative catalyst. The promoters are substances that enhance the activity of catalyst and poisons are the substances which decrease the activity of catalyts. How many types of catalysts are there ?

Read the given passage and answer the questions A substance which alters the rate of chemical reaction without undergoing any change in mass and chemical composition at the end of reaction is called catalyst. It may be noted that catalyst which increases the speed of a reaction is called positive catalyst and catalyst which decrease the speed of reaction is called negative catalyst. The promoters are substances that enhance the activity of catalyst and poisons are the substances which decrease the activity of catalyts. What are a positive catalysts ?

Read the given passage and answer the questions A substance which alters the rate of chemical reaction without undergoing any change in mass and chemical composition at the end of reaction is called catalyst. It may be noted that catalyst which increases the speed of a reaction is called positive catalyst and catalyst which decrease the speed of reaction is called negative catalyst. The promoters are substances that enhance the activity of catalyst and poisons are the substances which decrease the activity of catalyts. What are promoters ?

MODERN PUBLICATION-METALS AND NON-METALS-EXERCISE
  1. The substances which allow the passage of electricity through them…..

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  2. List two metals which are easy to cut .

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  3. what happen when a piece of zinc is added to copper sulphate solution?

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  4. Name two amphoteric oxide

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  5. Name one non-metal and one metal which are in liquid state at room tem...

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  6. Which is more metallic: sodium or aluminium?

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  7. What can be seen when strip of copper metal is placed in a solution of...

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  8. Zinc displaces copper from a solution of CuSO4 because zinc is .........

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  9. Magnesium liberates ………..gas on reacting with boiling water.

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  10. The white powder formed when magnesium ribbon burns in oxygen it forms...

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  11. Which of the following displacement reaction cannot accur? CuSO(4(aq...

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  12. Is following reactions will occurs?explain: MgSO4(aq)+Fe(s)rarrFeSO4(...

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  13. Give chemical equations to show that: hydrogen gas is passed over heat...

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  14. Give the reactions when red hot iron reacts with steam

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  15. Give chemical equations to show that: sodium oxide reacts with water.

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  16. Name two metals which are lighter than water.

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  17. Which metal is used in Fittig reaction ?

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  18. Complete the following equations: Fe(s)+H2O(g)overset(Red heat)rarr

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  19. Complete and balance the following equtions: Na2O+H2Orarr

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  20. Complete the following equations: Ag^(+)(aq)+Cu(s)rarr

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  21. Complete the following equations: MgO+Cu rarr

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