Minerals and Ores

Q.

What is the difference between organic and inorganic minerals?

Q. What is the definition of minerals?

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

Q. The mineral present in chalk or limestone is .

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

Q. Minerals have a definite .

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

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

Q. What is a mineral?

1. A homogeneous, naturally occurring substance with a definable internal structure.
2. A heterogeneous, naturally occurring substance with a defined external structure.
3. A heterogeneous, man-made substance with a defined internal structure.
4. A homogenous, man-made substance with a defined internal structure.

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. 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. 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. Which of the following are properties of minerals?

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

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. Select the statement(s) that is/are true in the context of a mineral.

1. A mineral is heterogeneous because it shows uniform properties throughout.
2. Minerals are naturally occurring substances and are not man-made or manufactured in a factory.
3. Minerals have definite internal structure as the arrangement of chemical elements in a mineral are fixed.
4. A mineral is homogeneous because it has uniform properties throughout.

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

1. True
2. False

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.