ICSE ICSE Class 7 - CISCE Question Bank Solutions

Fill in the blank 

A metal that gives dazzling effect to crackers when they explode is ______

Write ‘true’ or ‘false’ for the following statement : 

Silver is used to make electric cables.

Write ‘true’ or ‘false’ for the following statement. 

Iodine acts as an antiseptic in the form of a tincture of iodine. 

A metal with melting point less than 50°C is

A metal which is neither ductile nor malleable is

Aluminium is not used to make : 

Fill in the blank.

2H₂ means two _______ of hydrogen.

Fill in the blank spaces by choosing the correct words from the given list. 

List: amalgam, chlorine, gallium, sodium chloride, silver chloride 

______ is a liquid metal. 

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

Salt of silver, such as ________ is used for making photographic films.

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

A solution of a metal in mercury is called ________

Statements given below are incorrect. Write the correct statements : 

Bronze is a mixture of 10% copper, 80% zinc and 10% tin.  

Statements given below are incorrect. Write the correct statements : 

Aluminium is best conductor of electricity.   

Statements given below are incorrect. Write the correct statements : 

Zinc is used for making power transmission wires.  

Write ‘True’ or ‘False’ in front of following statement.  

Brass is an alloy of copper and zinc and has lustrous yellow colour. 

Write ‘True’ or ‘False’ in front of following statement. 

Magnesium is used in making light weight alloys of aluminium. 

Define the term acid rain.

Bronze is an alloy of ______.

Tick (√) the most appropriate answer. 

Graphite is used :

Name a metal which is not malleable : 

Name a metal which is best conductor of electricity :