Acidic substances change colour of blue litmus paper to _____________.

Alkaline subtances change colour of red litmus paper to ______________.

Ravi tested bitter gourd extract. Red litmus paper changes colour to blue. So, it is a ____________ substance.

Sugar syrup does not change the colour of red and blue litmus paper. It is a _____________ substances.

Besides litmus paper, acidic and alkaline substances may also be tested using ______________.

which one of these is an alkali?

how does alkali change litmus paper?

Pineapple is

Shampoo is

Vinegar is

WHAT ARE THE PROPERTIES OF ACID ?

When Y is added to the RED litmus paper, the litmus paper remained red. This means

Choose one example of alkaline substance

Why does toothpaste have alkaline properties?

Agricultural lime is alkaline and reduces soil____________

A wasp sting is alkaline. Vinegar may be applied to the area of the sting as first aid.