GRADE -VII - BASES AND ITS APPLICATION

What is the nature of baking soda as described in the chapter?

• Acidic

• Basic

• Netural

• None of the above

What effect does turmeric have when mixed with a basic solution?

• It turns pink

• It turns red

• It turns yellow

• It turns blue

Which base is found in window cleaner?

• Sodium hydroxide

• Ammonium hydroxide

• Magnesium hydroxide

• Calcium hydroxide

What is the primary use of sodium hydroxide?

• Used in cleaning

• Used in baking

• Used in medicine

• Used in agriculture

What turns red litmus paper blue?

• Acid

• Salt

• Water

• Base

What is the primary component of antacid?

• Magnesium hydroxide

• Sodium hydroxide

• Calcium hydroxide

• Ammonium hydroxide

Which of the following is a basic substance used to treat acidic soil?

• Sodium hydroxide

• Magnesium hydroxide

• Calcium hydroxide

• Sodium chloride

What is the pH of a basic solution?

• pH less than 7

• pH equal to 7

• pH greater than 7

• pH of 0

What color does phenolphthalein turn in a basic solution?

• Red

• Blue

• Pink

• Colourless

What is the chemical nature of substances that taste bitter and feel soapy?

• Acidic

• Neutral

• Salty

• Basic