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प्रश्न
Name the following:
The type of change physical or chemical involved – ‘during respiration in human beings’.
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उत्तर
Chemical Change.
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equations:
Fe `"SO"_4` + NaOH `→`
(aq.) (aq.)
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
In a double decomposition precipitation reaction both the reactants must be ............ soluble.
What is the reaction called when oxidation and reduction take place simultaneously? Explain with one example.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
Give an example of a reaction where the following are involved:
Close contact
Define a photochemical reaction.
Multiple choice:
A reaction of a type: AB + CD → AD + CD, involves
What do you understand by 'chemical reaction'?
Name: Two carbonates do not produce carbon dioxide on heating.
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium chloride
Explain the Silver nitrate solution is kept in coloured reagent bottles in the laboratory.
Give two examples where a chemical reaction is accompanied by a change in colour of the reactants and products on completion of the reaction.
Can a nickel spatula be used to stir copper sulphate solution? Justify your answer.
Analogy:
H2O: Water:: NaCl: ______.
A chemical change may involve –
Iron benches kept in lawns and gardens get____________. It is a _________ change because a new _________ is formed.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think formation of rust from iron is a chemical change?
Beating an egg to make a cake is a ______.
When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.
