Ores and Minerals

Q.

Which of the following are ores of copper?

1. Azurite

2. Malachite

3. Dolomite

4. Cuprite

Q.

An ore of manganese metal is:
(a) bauxite (b) haematite (c) cuprite (d) pyrolusite

Q.

(a) Give the chemical names and formulae of main ores of (i) aluminium (ii) iron (iii) zinc.

(b) Which impurities are present in bauxite.

(c) What is red mud, how is it removed?

Q. What do you mean by the native state?

Q.

Assertion: In froth flotation process sodium ethyl xanthate is used as collector.

Reason: Sulphide ores are water soluble.

Q.

Cassiterite is an ore of Cesium. True or False?

1. True

2. False

Q. Two oxides of metal contain 72.4 % and 70% of metal respectively? If formula of 2nd oxide is M2O3 find that of first

Q.

Is $\mathrm{MgO}$ a metal or non metal?

Q.

What is the name of the most common ore of iron and what is its chemical formula?

Q.

How is alumina obtained from bauxite?

Q.

Which metal occurs as:

(a) A sulphide, (b) a halide,

(c) a carbonate, (d) an oxide.

Also gives the names of their respective ores.

Q.

The major ore fo aluminium is known as:
(a) cinnabar (b) calamine (c) bauxite (d) pyrolusite

Q.

Where is Aluminium found?

Q. 44.What is the order of melting points and boiling points for halides of group 1 and group 2 elements. Give both orders, viz., for the same metal and same halide for both the groups.

Q.

Why $AI{F}_3$ is not Hypovalent?

Q.

An important ore of zinc metal is :
(a) calamine (b) cuprite (c) pyrolusite (d) haematite

Q.

Which of the following is an iron ore?
(a) chnnabar (b) calamine (c) haematite (d) rock salt

Q.

Common impurities present in bauxite are

1. $\mathrm{CuO}$

2. $\mathrm{ZnO}$

3. $\mathrm{CaO}$

4. ${\mathrm{SiO}}_2$

Q. If one of the metal is mercury, the alloy is known as:

1. potash alum
2. amalgam
3. solder
4. bronze

Q.

Two oxides of a metal (M) have 20.12% and 11.19% oxygen respectively. The formula of the first oxide is MO. Determine the formula of the second oxide.

Q.

Which metal can be extracted from each one of the following ores:

(a) bauxite (b) calamine (c) haematite.

Q. What do you mean by the native state?

Q.

Halide ore out of the following is

1. Cinnabar

2. Horn silver

3. Limonite

4. Galena

Q. Name a metal which occurs free in nature.

Q.

Distinguish between :

(a) a mineral and an ore,

(b) an ore and a metallic compound.

Q.

Match the column:
$\begin{array}{cccc}& & & \\ & \text{Column-I}& & \text{Column-II}\\ \left(\text{a}\right)& \text{Anglesite}& \left(\text{p}\right)& \text{Sulphate ore}\\ \left(\text{b}\right)& \text{Galena}& \left(\text{q}\right)& \text{Sulphide ore}\\ \left(\text{c}\right)& \text{Cerussite}& \left(\text{r}\right)& \text{Ore of Pb}\\ \left(\text{d}\right)& \text{Cinnabar}& \left(\text{s}\right)& \text{Carbonate ore}\\ & & \left(\text{t}\right)& \text{Ore of Hg}\end{array}$

1. (a) p, r; (b) q, r; (c) q, t (d) r, s

2. (a) p, r; (b) q, r; (c) r, s (d) q, t

3. (a) q, r; (b) p, r; (c) r, s (d) q, t

4. (a) q, t; (b) q, r; (c) r, s (d) p, r

Q. Which of the following is not an iron ore?

1. Malachite
2. Haematite
3. Siderite
4. Limonite

Q. Match the anionic species given in Column I that are present in the ore(s) given in the column II:

$$\begin{array}{cccc}& ColumnI& & ColumnII\\ A.& Carbonate& p.& Siderite\\ B.& Sulphide& q.& Malachite\\ C.& Hydroxide& r.& Bauxite\\ D.& Oxide& s.& Calamine\\ & & t.& Argentite\end{array}$$

1. A $⟶$ p, s; B $⟶$ t; C $⟶$ q; D $⟶$ r
2. A $⟶$ p, q, s; B $⟶$ t; C $⟶$ q; D $⟶$ r
3. A $⟶$ q, s; B $⟶$ p, t; C $⟶$ q; D $⟶$ r
4. A $⟶$ s; B $⟶$ q; C $⟶$ t; D $⟶$ r

Q.

From the given set of minerals, the number of ores of copper is/are ___
Chalcocite, pyrargyrite, cuprite, carnallite, covellite, sphalerite, azurite, malachite, cryolite

Q.

Kalyani was heating an ore X of Zinc in absence of air. She observed that a gas Y is evolved in this process. When she passed the gas through a solution of slaked lime, it turned milky. The ore X and gas Y are-

1. X is $ZnS{O}_4$ and Y is $S{O}_2$

2. X is $ZnC{O}_3$ and Y is $C{O}_2$

3. X is $ZnS$ and Y is $S{O}_2$

4. X is $Zn(N{O}_3{)}_2$ and Y is $N{O}_2$