Practice Pakistan's most useful MCQs for competitive exams

Which of the following is a macro nutrient ?

• (A)  boron
• (B)  iron
• (C)  copper
• (D)  carbon

Answer

Submitted By :Ali Uppal

Which of the following is not a secondary pollutant_________________?

• (A)  ozone
• (B)  carbonic acid
• (C)  sulphuric acid
• (D)  carbon dioxide

Answer

Submitted By :Ali Uppal

Requirement of macronutrient per acre of the land is_________________?

• (A)  5 to 200 kg
• (B)  20-200 kg
• (C)  200-400 kg
• (D)  30-400 kg

Answer

Submitted By :Ali Uppal

Which of the following is not a heavy industry ?

• (A)  iron
• (B)  fertilizer
• (C)  paper
• (D)  none

Answer

Submitted By :Ali Uppal

Pollutants have adverse effect over_________________?

• (A)  Biosphere
• (B)  Ecosystem
• (C)  Both a & b
• (D)  Hydrosphere

Answer

Submitted By :Ali Uppal

The main product of bacterial action is_________________?

• (A)  Nox
• (B)  NO2
• (C)  N2O3
• (D)  NO

Answer

Submitted By :Ali Uppal

The percentage of suspended solid waste in raw water is removed by coagulation is__________________?

• (A)  60
• (B)  70
• (C)  80
• (D)  90

Answer

Submitted By :Ali Uppal

Which one of the following makes the bulk of hydrospheres content ?

• (A)  oceans
• (B)  glaciers & icecaps
• (C)  fresh water lakes and ponds
• (D)  All have equal distribution

Answer

Submitted By :Ali Uppal

Which substance can be used for disinfecting water ?

• (A)  KMnO4
• (B)  Alums
• (C)  Ozone
• (D)  All

Answer

Submitted By :Ali Uppal

The main pollutant of leather tanneries in the waste water is____________________?

• (A)  chromium III
• (B)  chromium IV
• (C)  chromium V
• (D)  chromium VI

Answer

Submitted By :Ali Uppal