NCERT Class VIII Science Solutions: Chapter 4-Materials: Metals and Non-Metals Part 3 (For CBSE, ICSE, IAS, NET, NRA 2022)

Doorsteptutor material for CBSE/Class-8 is prepared by world's top subject experts: get questions, notes, tests, video lectures and more- for all subjects of CBSE/Class-8.

Question 7:

Can you store lemon pickle in an aluminium utensil? Explain.

Answer:

No, we cannot store lemon pickle in aluminium utensils, as metals react with acids to liberate hydrogen gas. The pickle (which is acidic in nature) can be spoiled.

Image Result for Can You Store Lemon Pickle in an Aluminium …

Question 8:

In the following Table some substances are given in Column I. In Column II some uses are given. Match the items in column I with those in Column II.

Match the Items in Column I with Those in Column II
Column IColumn II
GoldThermometers
IronElectric wire
AluminiumWrapping food
CarbonJewellery
CopperMachinery
MercuryFuel

Answer:

Match the Items in Column I with Those in Column II. Answer
Column IColumn II
GoldJewellery
IronMachinery
AluminiumWrapping food
CarbonFuel
CopperElectric wire
MercuryThermometers

Developed by: