State whether the following is an acid, alkali or a neutral substance. If it is an acid or alkali, you should also say whether they are strong or weak.

• A liquid with a $\mathrm{pH}$ of $8$.

State whether the following is an acid, alkali or a neutral substance. If it is an acid or alkali, you should also say whether they are strong or weak.

• A substance which turns universal indicator yellow.

State whether the following is an acid, alkali or a neutral substance. If it is an acid or alkali, you should also say whether they are strong or weak.

• A chemical with a $\mathrm{pH}$ of $7$.

State whether the following is an acid, alkali or a neutral substance. If it is an acid or alkali, you should also say whether they are strong or weak.

• A substance with a $\mathrm{pH}$ of $14$.

State whether the following is an acid, alkali or a neutral substance. If it is an acid or alkali, you should also say whether they are strong or weak.

• A liquid which turns universal indicator blue.

For the following statement, say whether it is true or false. If it is false, write the correct answer.

A strong acid has a $\mathrm{pH}$ range of $4-6$.

For the following statement, say whether it is true or false. If it is false, write the correct answer.

A weak alkali has a $\mathrm{pH}$ range of $8-10$.

For the following statement, say whether it is true or false. If it is false, write the correct answer.

A neutral substance turns universal indicator green.