ICSE ICSE Class 7 - CISCE Question Bank Solutions

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"`

Balance the following equation. Also name the product formed. 

`"Na"+ "H"_2 "O" → "NaOH"+ "H"_2`

Balance the following equation. Also name the product formed. 

`"CO" + "O"_2  → " CO"_2`

Balance the following equation. Also name the product formed. 

`"Zn" + "HCI" →  "ZnCI" _2 + "H"_2`

Define: Atomic number

Balance the following equation. Also name the product formed.  

K₂O + H₂O    → KOH 

Balance the following equation. Also name the product formed. 

CO₂ + C →  CO

Balance the following equation. Also name the product formed.

N₂ + H₂   →  NH₃ 

Balance the following equation. Also name the product formed.

PbCO₃    →   PbO +CO₂

Balance the following equation. Also name the product formed. 

FeCI₂ + CI₂ →  FeCI₃

Write your observation and name the product when zinc reacts with dilute hydrochloric acid.

Write your observation and name the product when ron nails are added to an aqueous solution of copper sulphate.

Write your observation and name the product when An aqueous solution of barium chloride is added to dilute sulphuric acid.

 Define: Atomic number

Define: Mass number : 

Define: Atomic weight :