ICSE ICSE Class 7 - CISCE Question Bank Solutions for Chemistry

Give reason of Why do liquids and gases flow but solids do not ?

Give reason of A gas fills up the space available to it.

Give reason of The odour of scent spreads in a room.

Write word equation for the following skeletal equation:

\[\ce{KClO3 -> KCl + O2}\]

Give reason of We can walk through air.

Write word equation for the following skeletal equation:

\[\ce{Zn + HCl -> ZnCl2 + H2}\]

Give reason of Liquids have definite volume but no difinite shape.

Write word equation for the following skeletal equation:

\[\ce{FeCl2 + Cl2 -> FeCl3}\]

Write word equation for the following skeletal equation:

\[\ce{CO + O2 -> CO2}\]

Give reason  of When a teaspoon of sugar is added to half a glass of water and stirred, the water level in the glass does not rise.

Give reason

When an empty gas jar is inverted over a gas jar containing a coloured gas, the gas also spreads into the empty jar.

Give reason

A red ink drop added to small amount of water in a glass turns water red in some time.

Write word equation for the following skeletal equation:

\[\ce{Ca + O2 → CaO}\]

Give an experiment to explain that there are intermolecular spaces between water molecules.

Write word equation for the following skeletal equation:

\[\ce{Na + O2 ->  Na2O}\]

Write word equation for the following skeletal equation:

\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]

Write word equation for the following skeletal equation:

\[\ce{AgBr -> Ag + Br2}\]

Write word equation for the following skeletal equation:

\[\ce{KNO3 -> KNO2 + O2}\]

Fill in the blank.

Water is a matter because it has mass and occupies _______

Balance the following chemical equation :

FeS + HCl →  FeCl₂ + H₂S