Which city of America has the largest number of rail roads?

A. New York

B. Washington

C. Chicago

D. Venice

(more…)

Which metal has the highest density?

A. Gold

B. Platinum

C. Iron

D. None of these

(more…)

In which cell organelle do photo and thermochemical reactions occur in different sites?

A. Ribosomes

B. Golgi apparatus

C. Chloroplast

D. Mitochondria

(more…)

What is the second most abundant element in the earth‟s crust?

A. Silicon

B. Aluminium

C. Sodium

D. Magnesium

(more…)