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WorksheetsChemical change and chemical bond
Total questions: 15
Worksheet time: 11mins
Combustion of fuel is of __________ and irreversible change
Fast
Slow
None
What is a natural chemical change
Respiration
Combustion of fuels
Softening of hard water
The two different types of chemical bonds are
Ionic and covalent bond
Anions and cations bond
Valent and covalent bond
This type of chemical bond occurs when an electron is gained or lost by an atom of an element
Covalent
Ionic
Cations
The chemical bond formed due to an electrostatic force of attraction between the oppositely charged cation and anion is called
Ionic compound
Electrovalent bond
Electrostatic bond
What is used to clean Shahabad tile
Sulphuric acid
hydrochloric acid
Citric acid
Which type of chemical bond occurs when electrons are shared by atoms of at least two different elements
Valent bond
Ionic bond
Covalent bond
In the equation c+o2➡️ Co2 which of them are the reactants
C+02
None
Co2
Both
A colourless solution of calcium hydroxide in a test tube turns ____________ after blowing in it trough a blow tube for some time
stays the same
Turns red
Turns yellow
Become milky
water is a covalent bond
True
False
During respiration we inhale carbon dioxide and exhale oxygen
True
False
Is the equation of CaCI2+Na2CO3—>CaCO3+NaCI balanced
True
False
None
Reactants are on the_________ side of the equation
Right side
Left side
There are no reactants in an equation
what Is the reactant in the equation of calcium carbonate
Carbon dioxide+calcium hydroxide
Chlorine+calcium hydroxide
None above
Rusting I’d iron is a _________ chemical change
physical
Slow
Fast
