ICSE ICSE Class 7 - CISCE Question Bank Solutions for Chemistry

Write symbolic representation for the following word equation and balance them :

Calcium oxide + Water → Calcium hydroxide

Write symbolic representation for the following word equation and balance them :

Aluminium + Chlorine → Aluminium chloride.

Write symbolic representation for the following word equation and balance them :

Iron + Sulphur → Iron sulphide.

Write true or false for each statement. Rewrite the false statement correctly.

If the intermolecular space is more than the intermolecular force will be weaker.

The state of matter which has no definite shape or volume is called

There are large intermolecular gaps in

A solid is a state of matter that has

 Rust is a hydrated oxide of iron which is

Balance the following equation :

 Fe + O₂ → Fe₃ O₄

Balance the following equation .

N₂ + O₂ → NO

Balance the following equation :

Pb₃O₄ → PbO + O₂

Balance the following equation. Also name the product formed. 

`"NaNO"_3  → "NaNO"_2  + "O"_2`  Name of product (s)

Balance the following equation Also name the product formed.

`"K" + "CI"_2 → "KCI"`

Balance the following equation. Also name the products formed. 

\[\ce{Ag + S -> Ag2S}\]

Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride    

A gas used to sterilisation of drinking water is ________

Balance the following equation. Also name the products formed. 

`"Mg" + "O"_2  →  "MgO"`

Balance the following equation. Also name the product formed. 

`"KCIO"_3 →  "KCI" +"O"_2`

Balance the following equation. Also name the product formed. 

` "H"_2"O"_2    →  "H" _2 "O" + "O"_2` 

State the term.

The number of atoms present in a molecule of an element _________

Balance the following equation. Also name the product formed. 

 `"H"_2 +"CI"_2  →  "HCI"`