NAME:…………………………………………..

CLASS:………………………………………….

Check Your Understanding

Match correctly.

(a) This substance changes the colour of blue litmus paper to red.

(b) This substance usually tastes bitter and feels soapy when we touch it.

(c) This substance does not change the colour of blue or red litmus paper.

(d) This substance usually tastes sour.

(e) This substance is usually salty, sweet or tasteless.

Checking Concept

Answer all question

1. What can be used to determine whether substances are acidic,alkaline, or neutral ?2. Classify the substances below into three groups based on their properties?

ACIDIC SUBSTANCES ALKALINE SUBSTANCES NEUTRAL SUBSTANCES

ACID SUBSTANCES

ALKALINE SUBSTANCES

NEUTRAL SUBSTANCES

VINEGAR,SOY SOUCES,MANGO JUICE,RICE,SALT WATER,LIQUID DETERGENT,TOOTH PASTE,GRAPE JUICE