ABS-2

Which of the following natural indicators turns red in acidic medium and blue in basic medium?

• Turmeric

• Red cabbage leaves extract

• Litmus

• Phenolphthalein

What color does turmeric exhibit in a basic medium?

• Yellow

• Red

• Blue

• Reddish-brown

Red cabbage leaves extract shows which color in a neutral medium?

• Red

• Green

• Purple

• Yellow

Phenolphthalein, a synthetic indicator, is colorless in which type of medium?

• Basic

• Neutral

• Acidic

• Both neutral and acidic

Methyl orange displays which color in an acidic medium?

• Orange

• Red

• Yellow

• Pink

According to the Arrhenius concept, acids are substances that do what in an aqueous solution?

• Turn blue litmus paper blue

• Furnish hydroxide ions (OH−)

• Furnish hydrogen or hydronium ions (H+ or H3O+)

• Taste bitter

Which of the following is classified as a strong acid?

• CH3COOH (acetic acid)

• H2CO3 (carbonic acid)

• HCl (hydrochloric acid)

• HCOOH (formic acid)

Which of the following is an example of a weak acid?

• HNO3 (nitric acid)

• H2SO4 (sulfuric acid)

• H3PO4 (phosphoric acid)

• CH3COOH (acetic acid)

Sulfuric acid (H2SO4) is classified as a dibasic acid because it has how many replaceable hydrogen ions?

• One

• Two

• Three

• Zero

Hydrochloric acid (HCl) is an example of which type of acid based on its basicity?

• Tribasic acid

• Dibasic acid

• Monobasic acid

• Weak acid