Advertisements
Advertisements
Question
Name the following:
The type of change physical or chemical involved – ‘during respiration in human beings’.
Advertisements
Solution
Chemical Change.
APPEARS IN
RELATED QUESTIONS
When carbon dioxide is passed through lime water, it turns milky due to the formation of ______.
Complete and balance the following chemical equations:
`"H"_2"S"` + `"CI"_2` `→`
Fill in the blanK
A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
TRUE \ FALSE
The evolution of a gas during a chemical reaction is shown by an arrow pointing downwards. True or false ?
Fill in the blank.
Melting of ice is a _______ change.
Complete the statement by filling the gap using an 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)
An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.
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)
Oxygen is a ______ in respiration.
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
What is a chemical reaction?
What do you understand by precipitation reaction? Explain with examples.
Multiple choice:
Thermal decomposition of sodium carbonate will produce
Give reason for the following:
Even though rusting is an exothermic reaction, the heat evolved when an iron nail rusts is unnoticeable.
Give reason for the following:
Electrolytic decomposition of water is a reaction involving change of state.
Burning of paper is a ______ change.
Write some materials prepared by chemical changes.
Classify the following as physical or chemical properties
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
Classify each of the following, as a physical or a chemical change. Give reasons.
(a) Drying of a shirt in the sun.
(b) Rising of hot air over a radiator.
(c) Burning of kerosene in a lantern.
(d) Change the colour of black tea by adding lemon juice to it.
(e) Churning of milk cream to get butter.
Beating an egg to make a cake is a ______.
The chemical formula of rust is ______.
Write the chemical reaction of baking soda with lemon.
