1. Tintometer is used for _____.
[A] Odour
[B] Hardness
[C] Temperature
[D] Colour
Answer: Option D
2. The rain is called as Acid rain if the pH is less than _____.
[A] 5.6
[B]3
[C] 7.5
[D] 8.5
Answer: Option A
3. On which scale turbidity is measured?
[A] Silica cobalt scale
[B] Standard Silica Scale
[C] Silica Platinum scale
[D] Platinum scale
Answer: Option B
4. Temporary hardness in water is caused by the presence of _____.
[A] Sulphate of Ca and Mg
[B] Nitrates of Ca and Mg
[C] Chlorides of Ca and Mg
[D] Bicarbonate of Ca and Mg
Answer: Option D
5. What is the most common source of acidity in water?
[A] Nitrogen
[B] Sulphuric acid
[C] Oxygen
[D] Carbon dioxide
Answer: Option D