Atmospheric sulphur dioxide, soluble in water, is carried back to earth in rainwater as
A. Weak sulphuric acid
B. Weak hydrochloric acid
C. Weak nitric acid
D. All of the above
Answer: Option A
A. Weak sulphuric acid
B. Weak hydrochloric acid
C. Weak nitric acid
D. All of the above
Answer: Option A
A. Cinnamomum - Amoora association
B. Bischofia - Dillenia association
C. Shorea - Lagerstroemia association
D. Mesua - Michelia association
Which of the following react with haemoglobin, forming methemoglobin which will not take up oxygen?
A. Nitrates
B. Nitrites
C. Carbides
D. Oxides
Internally, hydathode shows a group of loosely arranged parenchymatous cells called as
A. Epiderm
B. Epithelium
C. Ampithecium
D. Epithem
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