Lactometer is used for testing the purity of-
a. Milk
b. Water
c. Iron
d. None of these
ans-a
Q. The Fifth Summit of BRICS was held on March 26-27, 2013 in

A. New Delhi (India) 

B. Moscow (Russia) 

C. Rio de Janeiro (Brazil)

D. Durban (South Africa)
ans-d