HARD
8th Maharashtra Board
IMPORTANT
Earn 100

What happens when sour substances like lime juice, tamarind water falls on shahabad stones or kitchen platform? Why?

Important Questions on Introduction to Acid & Base

HARD
8th Maharashtra Board
IMPORTANT
General Science>Chapter 12 - Introduction to Acid & Base>Can you tell?>Q 2
How can we say that the soil samples collected from your surroundings are acidic, alkaline or neutral?
HARD
8th Maharashtra Board
IMPORTANT
General Science>Chapter 12 - Introduction to Acid & Base>Can you tell?>Q 3
Which substances are used to clean greenish stains on copper vessels and to shine blackish silver utensils?
HARD
8th Maharashtra Board
IMPORTANT
General Science>Chapter 12 - Introduction to Acid & Base>Can you tell?>Q 4
Why tooth-paste is used for brushing teeth?
HARD
8th Maharashtra Board
IMPORTANT
General Science>Chapter 12 - Introduction to Acid & Base>Use your brain power
The iron knife shines better after cutting the sour fruits like lemon, raw mangoes. Why?
HARD
8th Maharashtra Board
IMPORTANT
General Science>Chapter 12 - Introduction to Acid & Base>Exercises>Q 1

Identify the following solutions, whether they are acidic or alkali.

Solution Change in indicator Acid/ Base
Litmus Phenolphthalein Methyl orange
1.  ___ No change  ___  
2.  ___ ___ Orange colour turns red  
3.  Red litmus blue ___ ____  
MEDIUM
8th Maharashtra Board
IMPORTANT
General Science>Chapter 12 - Introduction to Acid & Base>Exercises>Q 1
Write chemical names from the given formulae:
H2SO4, Ca(OH)2, HCl, NaOH, KOH, NH4OH.
MEDIUM
8th Maharashtra Board
IMPORTANT
General Science>Chapter 12 - Introduction to Acid & Base>Exercises>Q 1
Sulphuric acid has highest importance in chemical Industry. Why?
MEDIUM
8th Maharashtra Board
IMPORTANT
General Science>Chapter 12 - Introduction to Acid & Base>Exercises>Q 4
Which acid is used for getting chloride salt?