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2161. Which of the following is not correctly matched ?

A. Galena : Lead sulphide

B. Green vitriol : Copper sulphate

C. Plaster of Paris : Calcium sulphate

D. Calomel : Mercurous chloride

Explanation:

2162. Sickle cell anaemia is a

A. genetic disorder

B. viral disease

C. bacterial disease

D. disease due to vitamin deficiency

Explanation:

2163. The vector of virus causing dengue fever is spread by

A. mosquito

B. housefly

C. sandfly

D. None of these

Explanation:

2164. Which one of the following is not correctly matched ?

A. Tea - Caffeine

B. Coffee - Tannin

C. Tobacco - Nicotine

D. Opium - Morphine

Explanation:

2165. Which of the following plants bears seeds but no fruits ?

A. Eucalyptus

B. Peepal

C. Pine

D. Cotton

Explanation:

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