Minerals and Ores

Q. Minerals have a definite .

1. external appearance
2. chemical composition
3. physical composition
4. place of origin

Q. What is the definition of minerals?

1. Minerals are homogeneous, naturally occurring substances with a definable internal structure.
2. Minerals are homogeneous, man-made substances with a definable internal structure.
3. Minerals are hetereogenous, naturally occurring substances with a definable internal structure.
4. Minerals are homogeneous, naturally occurring substances with an indefinable internal structure.

Q. An accumulation of any mineral with other elements in sufficient concentrations is called _______.

1. an igneous rock
2. an ore
3. an element
4. a mine

Q. Assertion (A) : If you extract mineral X from India and mineral X from South Africa and study their internal structure, they will be exactly alike.
Reason (R) : Minerals have a definite internal structure.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is the not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Q. In an ore, the of the mineral is sufficient to make its extraction commercially viable.

1. concentration
2. structure
3. density
4. hardness

Q. and are the two varieties of iron ore found in Karnataka. Select your two responses in alphabetical order.

1. Calcite
2. Magnetite
3. Hematite
4. Bauxite

Q. The mineral present in chalk or limestone is .

1. calcite
2. granite
3. magnetite
4. bauxite

Q. Minerals have a definite .

1. chemical composition
2. physical composition
3. place of origin
4. external appearance

Q. and are the two varieties of iron ore found in Karnataka. Select your two responses in alphabetical order.

1. Magnetite
2. Calcite
3. Bauxite
4. Hematite

Q. Identify the minerals from the following options:

1. Bauxite
2. Hematite
3. Chromite
4. Manganese

Q. Which of the following are properties of minerals?

1. Homogeneity
2. Heterogeneity
3. Factory made
4. Naturally occurring

Q. The mineral present in chalk or limestone is .

1. bauxite
2. calcite
3. granite
4. magnetite

Q. Tools and metals have shaped human history to an extent that specific periods of history are classified on the basis of the use of certain metals. Select all such periods of history from the following.

1. Golden Age
2. Stone Age
3. Iron Age
4. Bronze Age

Q. Select metallic minerals from the following.

1. Manganese
2. Gold
3. Limestone
4. Asbestos
5. Bauxite
6. Mica
7. Copper
8. Iron

Q. The first tools to be produced by humans were metal tools.

1. True
2. False

Q. Select the non-metallic minerals from the following.

1. Gold
2. Mica
3. Iron
4. Asbestos
5. Granite
6. Limestone
7. Manganese
8. Quartz

Q. Minerals are found in ores and all ores have one or more minerals in them.

1. True
2. False

Q. How many mineral species have been identified and how many are considered as ore minerals?

1. 2500, 150
2. 1000, 200
3. 2800, 100
4. 1550, 150