Which of the following causes acid rain ?
carbon dioxide
sulphur dioxide
carbon monoxide
oxides of sulphur and nitrogen
D.
oxides of sulphur and nitrogen
The zone of the candle flame which is moderately hot is called
non-luminous zone
luminous zone
inner dark zone
lowest blue zone
B.
luminous zone
Which of the following is not used for putting out fires from electrical gadgets ?
sand
water
foam
carbon dioxide
B.
water