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Give Reason for the Following: Molybdenum is Used in the Manufacture of Ammonia. - Chemistry

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प्रश्न

Give reason for the following:

Molybdenum is used in the manufacture of ammonia.

एक पंक्ति में उत्तर

उत्तर

Molybdenum increases the efficiency of the catalyst iron used in the manufacture of ammonia.

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अध्याय 2: Chemical Changes and Reactions - Exercise 2 (A) [पृष्ठ २४]

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सेलिना Concise Chemistry [English] Class 9 ICSE
अध्याय 2 Chemical Changes and Reactions
Exercise 2 (A) | Q 7.2 | पृष्ठ २४

संबंधित प्रश्न

Complete and balance the following chemical equations:

Ba`"CI"_2`   +  `"H"_2"SO"_4`   `→`

    (aq.)           (aq.)


Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.

\[\ce{NH3_{(g)} + HCl_{(g)} -> NH4Cl_{(s)}}\]


TRUE \ FALSE

Ammonia is a good oxidizing agent.


TRUE \ FALSE

Positively charged electrode is called the anode. True or false ?


Define chemical reaction.


Write true or false .
A black residue is formed when sugar is heated .


Name the type of chemical reaction shown by the following equation:

NaOH + HCl → NaCl + H2O


Explain by writing a word equation.

Bubbles are seen on adding lemon juice to baking soda.


What is a chemical reaction?


State the type of reactions for the following represent and balance the ones that are not balanced.

NaOH + HCl → NaCl + H2O


What do you observe when HCI is passed through a silver nitrate solution.


Give examples of exothermic reactions i.e. heat evolved in each of the following:

(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.


Give balanced equation for the following conversion affected by heat alone on the substance:

Zinc nitrate to nitrogen dioxide


Complete the table given below.

Heat on  copper carbonate Test for gas evolved  

Complete the table given below.

Heat on  Zinc nitrate Colour of residue  

State the following reaction represent oxidation or reduction.

\[\ce{Cl- ->Cl}\]


Silver metal can displace hydrogen gas from nitric acid.


Match the following:

1. Sodium Chloride a. CaSO41/2H2O
2. Calcium sulphate dihydrate b. C2H5Oh
3. Magnesium sulphate hydrate c. CaSO4.2H2O
4. Calcium sulphate hemihydrate d. NaCl
5. Phenol e. MgSO4.H2O

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.


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