Acid, bases and salts Worksheet-3

Acid, bases and salts Worksheet-3

 

Multiple-Choice Question:

  1. Bases turn ____ litmus _____.

(A) Red, blue                                    (B) Blue, red

 

  1. Litmus is a:

(A) Synthetic indicator         

(B) Natural indicator   

(C) Chemicalbut not an indicator 

(D) None of these

 

  1. Tamarind changes the colour of litmus paper to:

(A) Blue                (B) Red                 (C) Yellow            (D) Green

 

  1. Spinach juice change the colour of litmus paper to:

(A) Blue                (B) Red                 (C) Yellow            (D) Green

 

  1. A slice of unripe mangoes change the colour of litmus paper to:

(A) Blue                (B) Red                 (C) Yellow            (D) Green

 

  1. After eating a good amount of junk food I started feeling uneasy due to acidity. My mom gave me “ENO”. After drinking it I felt better. What do you think was there in ‘ENO’?

(A) Base               (B) Salt                 (C) Sugar              (D) Acid

 

  1. Detergent changes the colour of turmeric to:

(A) Red                 (B) Blue                (C) Purple            (D) Magenta

 

  1. Liquid ammonia is _____ in nature.

(A) Acidic             (B) Basic               (C) Neutral          (D) None of these

 

  1. Grape juice changes the colour of turmeric to:

(A) Red                 (B) Blue                (C) Green             (D) None of these

 

  1. Phenolphthalein will remain colourless with:

(A) Pineapple juice                          (B) Lime water             

(C) Milk of magnesia                       (D) Baking soda solution

 

Answer Key:

  1. (A)
  2. (B)
  3. (B)
  4. (B)
  5. (B)
  6. (A)
  7. (A)
  8. (B)
  9. (D)
  10. (A)