A. Air
B. Water
C. Noise
D. Radioactive
A. By reaction of hydrocarbon & nitric oxide in presence of sunlight
B. Appears only on sunny days
C. Is harmful for crops and trees also besides causing eye irritation & asthma
D. All A., B. & C.
A. Refrigerators
B. Xerox machines
C. Dermatological photo-therapy equipments
D. High voltage electrical equipments
A. Asphyxiation
B. Shortness of breath
C. Tuberculosis
D. Both B. & C.
A. Chlorine
B. Alkalis
C. Benzene hexachloride
D. Alkyl benzene sulphonate (ABS)
A. Stratosphere
B. Troposphere
C. Ionosphere
D. None of these
A. Bone decay
B. Cancer
C. Asphyxiation (suffocation)
D. Anemia
A. Turbidity
B. Color
C. Hardness
D. Dissolved gases
A. Foodstuffs
B. Woolen clothes
C. Metallic powder
D. None of these
A. Grey
B. Dark brown
C. Red
D. Black