Chemistry
Complete the statements by filling in the blank with the correct word/s:
Direct combination reaction of phosphorus pentoxide with water gives …………… [H3PO3/H3PO4].
Decomposition of silver salts in the presence of sunlight is an example of …………… [double decomposition / photochemical decomposition].
The element molybdenum used in the reaction of nitrogen with hydrogen at elevated temperatures is an example of a …………… [promoter/catalyst].
The reaction of coke with steam to give water gas is an example of an …………… [exothermic/endothermic] reaction.
The metal which reacts with steam and the reaction is reversible is …………… [calcium/iron]
Chemical Reaction
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Answer
Direct combination reaction of phosphorus pentoxide with water gives H3PO4.
Decomposition of silver salts in the presence of sunlight is an example of photochemical decomposition.
The element molybdenum used in the reaction of nitrogen with hydrogen at elevated temperatures is an example of a promoter.
The reaction of coke with steam to give water gas is an example of an endothermic reaction.
The metal which reacts with steam and the reaction is reversible is iron.
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Related Questions
Give one example each of -
(a) A peroxide
(b) A mixed oxide
(c) A dioxide.
Select the correct answer from A, B, C, D and E for each statement given below:
A: Iron
B: Carbonic acid
C: Hydrogen
D: Oxygen
E: Carbon monoxide
The product formed during direct combination reaction of carbon dioxide & water.
The neutral gas obtained on thermal decomposition of potassium nitrate.
The displaced product of the displacement reaction of sodium with cold water.
The catalyst used in the catalytic reaction involving the reactants nitrogen & hydrogen.
A neutral oxide which does not react with an acid or a base to give salt & water.
Give a balanced equation for each of the following types of reactions:
A thermal decomposition reaction in which a compound decomposes to give two new compounds.
A reaction of direct combination i.e. synthesis in which two gases combine to give another gas - which turns lime water milky.
A thermal decomposition reaction in which a metallic nitrate decomposes to give - a basic oxide.
A catalytic, reversible, exothermic reaction.
A displacement reaction in which a metal above hydrogen in the reactivity series, displaces another metal from the solution of its compound.
Differentiate between thermal decomposition & thermal dissociation.