- (A) 5
- (B) 100
- (C) 250
- (D) 500
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- (A) 50
- (B) 1000
- (C) 2000
- (D) 5000
- (A) Organic
- (B) Fatty
- (C) Inorganic
- (D) Dissolved
- (A) Respiratory ailments (e.g. bronchitis)
- (B) Skin diseases (e.g. dermatitis)
- (C) Silicosis
- (D) Blurred vision
- (A) Chlorination
- (B) Treating in biological oxygen pond
- (C) Chemical coagulation
- (D) None of these
- (A) 30 to 70 kV DC
- (B) 30 to 70 kV AC
- (C) 230 V AC
- (D) 230 V DC
- (A) 10
- (B) 45
- (C) 90
- (D) 115
- (A) Hydrogen sulphide
- (B) Mercury
- (C) Cadmium
- (D) Asbestos
- (A) Forest fire
- (B) Deforestation
- (C) Volcanic eruption
- (D) None of these
- (A) P1ACBP2P1
- (B) ACBB1A1A
- (C) ACBDA
- (D) ADBB1A1A

