Subject :NSO Class : Class 5
Refer to the given flow chart. Which out of P, Q, R and S represent iron and petroleum respectively?
AR and S
BP and Q
CQ and S
DP and R
Ans 1: (Master Answer)
Class : Class 1
Answer : B
Iron is present in huge amount in earth crust where it occurs in the combined state with other elements. Chief ores of iron are magnetite, hematite etc. Iron is extracted from these ores through a complicated process. Petroleum is fossil fuel that formed when large quantities of dead organisms were buried underneath sedimentary rocks and subjected to both intense heat and pressure. It is yellow to black liquid found in geological formations beneath the earth's surface.
Ans 2:
Class : Class 7
Ans 3: (Master Answer)
Class : Class 1
Iron is present in huge amount in earth crust where it occurs in the combined state with other elements. Chief ores of iron are magnetite, hematite etc. Iron is extracted from these ores through a complicated process. Petroleum is fossil fuel that formed when large quantities of dead organisms were buried underneath sedimentary rocks and subjected to both intense heat and pressure. It is yellow to black liquid found in geological formations beneath the earth's surface.