Ores and Minerals

Q.

Name the metal which is found in free state.

Q.

What is the color of potassium permanganate?

Q. why zinc is not a noble element? what is the criteria to be a noble element

Q. 62. An impure sample of pyrolusite are (MnO2) consist of 70% MnO2, 20% inert gases and rest is moisture.On strong heating all MnO2 is converted into MnO along with formation of O2.The % of Mn in dried sample is

Q.

What is the common name used for the Manganese (IV) oxide, Potassium permanganate, and Potassium dichromate?

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

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

Q. How many of the following ores belong to either aluminium or copper?
Bauxite, Siderite, Diaspore, Cuprite, Malachite, Carborundum, Kaolinite, Azurite,
Calamine, Cerussite, Cassiterite, Dolomite

Q. Metals are usually not found as nitrates in their ores. Out of the following two ($a$ and $b$) reasons which is /are true for the above observation?

1. $a$ is false but $b$ is true
2. $a$ is true but $b$ is false
3. $a$ and $b$ are true
4. $a$ and $b$ are false

Q. a metal oxide formula is M2O it can be thermally decomposite to the metal and oxygen .5.8gm of the m2o

Q.

Metal nitrates are usually not found as nitrates in their ores because they are highly soluble in water.

(a) Metal nitrates are highly unstable

(b) Metal nitrates are highly soluble in water

1. a is true but b is false
2. a and b are true
3. a and b are false
4. a is false but b is true

Q. Match the following ores with their ore types

1. Gypsum
2. Galena
3. Horn silver
4. Cuperite

Q. IN C3O2 , THE HYBRIDISATION STATE OF "C" IS A) SP2 B) SP C) SP3 D) DSP2

Q. does the moles of water and salt is same in a ny hydrated salt? for eg-Is it true to say that in BaCl2.2H20 no. of moles of water is equal to no.of moles of bacl2

Q. Mg metal is extracted from:

1. Cryolite
2. Carnallite
3. Malachite
4. Cassiterite

Q. Match the anionic species given in Column I that are present in the ore(s) given in Column II.
$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{(A) Carbonate}& \text{(P) Siderite}\\ \text{(B) Sulphide}& \text{(Q) Malachite}\\ \text{(C) Hydroxide}& \text{(R) Bauxite}\\ \text{(D) Oxide}& \text{(S) Calamine}\\ & \text{(T) Argentite}\end{array}$

1. $A\to P,Q,S;B\to T;C\to Q,R;D\to R$
2. $A\to P,S;B\to Q;C\to Q,T;D\to P$
3. $A\to Q,S;B\to S;C\to Q;D\to P$
4. $A\to P,Q;B\to R;C\to Q,R;D\to T$

Q.

The ore having two different metal atoms in its empirical formula form?

1. Haematite

2. Galena

3. Magnetite

4. Chalcopyrite

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. The oxidation states of the metal in the minerals haematite and magnetite respectively are:

1. II, III in haematite and III in magnetite
2. II, III in haematite and II in magnetite
3. III in haematite and II, III in magnetite
4. II in haematite and II, III in magnetite

Q. Mg metal is extracted from:

Q.

the iso-electro negativity of the following elements increases in the order of:

a- C, N, Si, P

b- N, Si, C, P

C- Si, P, C, N

D- P, Si, N, C

Q. One mole of potassium chlorate is thermally decomposed and excess of aluminium is burnt in the gaseous product. How many moles of aluminium oxide are formed?