ICSE ICSE Class 7 - CISCE Question Bank Solutions for Chemistry

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 :

What are noble gases? Name all in the order of their increasing density.   

State one use  of helium  

State one use of argon    

State the composition and two uses of given alloy:

Stainless steel

State the composition and two uses of given alloy:

Duralumin