Existence of Metals

Q.

Why all ores are minerals but all minerals are not ores?

Q.

Most abundant alkali metal in the earth crust is.

Q.

Second and third most abundant metal in earths crust:

1. Aluminium, Calcium

2. Iron, Silver

3. Iron, Calcium

4. None

Q. Which of the following is an ore of iron?​

1. Haematite​
2. Iron pyrites
3. Siderite
4. Greenalite​

Q.

Which of the following is the sulphide ore of iron?

1. Iron pyrite

2. Siderite

3. Hematite

4. Magnetite

Q. Name one metal which when placed in ferrous sulphate solution will discharge the colour green colour of the solution. Write a chemical equation and state the reasons also.

Q.

A metal which is highly reactive can't exist in the native state.

1. True

2. False

Q. Which of the following statement is correct?

1. All ores are minerals.
2. All minerals are ores.
3. Some ores are not minerals.
4. Not all ores are minerals.

Q.

Copper and silver occurs in both free and combined States.

1. True
2. False

Q.

25. State whether the following statement is true or false.

“Sodium is the most abundant metal found in the earth’s crust.”

1. True
2. False

Q.

Name the metal which is the most abundant in earths crust?

Q.

Define the following terms.

(i) Minerals

(ii) Ores

(iii) Gangue

Q.

Write True or False for the following statement.

Minerals and ores are the same.

1. True
2. False

Q. Assertion :Lithium shows some similarities with magnesium. Reason: They possess almost equal ionic sizes.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

Chemical name of ore of Cu_{​​​​​2}​​​​S ?

Q.

Define the terms: Mineral, Ore and Gangue.

Q. Choose the memory cards with respect to the name of the ore and its chemical formula.

1. $F{e}_3{O}_4$
2. ${\mathrm{FeS}}_2$
3. ${\mathrm{Fe}}_2{O}_3$
4. Haematite
5. Magnetite
6. Iron pyrite

Q.

Define metals.

Q. Concentration of ore is also called ore dressing.

1. True
2. False

Q.

Distinguish between mineral and an ore.

Q. The most abundant metal in the Earth’s crust is______

1. Aluminium
2. Calcium
3. Sodium
4. Gold

Q.

The elements or compounds, which occur naturally in the Earth's crust, are known as __________.

1. ores

2. minerals

3. gangue

4. flux

Q. examples of low grade ores are?

Q.

Choose the correct sequence for extraction of metal from its ore.

i) Concentration of ore
ii) Reduction of metallic oxides
iii) Conversion of the ore into its oxide
iv) Refining of impure metal

1. $iv\to i\to iii\to ii$
2. $i\to iii\to ii\to iv$
3. $i\to iii\to iv\to ii$
4. $i\to ii\to iii\to iv$

Q. are least likely anions to be found in minerals.

1. Carbonates
2. Sulphates
3. Nitrates
4. Sulphides

Q. ____ are elements and compounds that occur naturally in the Earth's crust.

1. Ore
2. Slag
3. Minerals
4. Gangue

Q.

Concentrated metal ores are converted to their oxides for extracting metal from ore.

1. True

2. False

Q. The metal which can be extracted from the bauxite ore is:
(a) Na
(b) Mn
(c) Al
(d) Hg

Q. Metallurgy includes extraction as well as purification of metals.

1. True
2. False

Q. The impurities present in mined ores are technically calledand the process of removing them from the ore is calledof an ore.

1. gangue
2. flux
3. concentration
4. metallurgy