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प्रश्न
Give an example of a reaction where the following are involved
Pressure
उत्तर
\[\ce{N2 + 3H2 ⇌[][Above 200 atm] 2NH3}\]
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संबंधित प्रश्न
Give one example that illustrates the following characteristics of a chemical reaction:
Change in state
Write the missing reactants and products and balance the equations.
................+ HCI `→` NaCI + `"H"_2"O"` + .........................
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?
- temperature and Pressure
- concentration of reactants
- presence of catalyst
- none of these
Fill in the blank
A new substance is always formed in a _______ change.
State what you would observe when the following substance is heated in a glass test tube Copper (II) carbonate Red lead .
What is the reaction called when oxidation and reduction take place simultaneously? Explain with one example.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
Chlorine (Cl2) molecule is formed by ______ of electrons between two chlorine atoms.
State the conditions necessary for a chemical change or reaction.
Define Photochemical reaction
Give an example
Write the chemical reaction where the following changes are observed.
Precipitate is formed
Define:
Electrochemical reaction
Give one example
Give reason for the following:
Electrolytic decomposition of water is a reaction involving change of state.
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 the basic material to manufacture urea.
Mention the various conditions required for a chemical reaction to occur.
Which of the following is not an “element + element → compound” type reaction?
Write five changes in the characteristics of a substance that can take place during a chemical change.
Write a note on the following:
Fermentation
Define the following term:
Chemical change
