Mineral Resources: Metal-Nonmetal

Solid, liquid, or gaseous substances naturally formed in rocks/soil that can be extracted for economic use are called—

Which of the following is a gaseous mineral resource?

Which is a liquid mineral resource?

Which country/region is famous for petroleum mineral exports?

South Africa is famous for mines of—

Bangladesh primarily abounds in which mineral resource?

The molten mixture that pours out from volcanoes is called—

When magma cools and solidifies, the rock formed is—

Granite is an example of—

Sandstone is an example of—

Coal is an example of—

Sedimentary rocks are formed from—

Igneous and sedimentary rocks transform under high pressure/temperature into—

Which factor does NOT help form different layers of rocks underground?

Substances above/below soil from which we obtain metals/nonmetals to make products are called—

Minerals from which metals/nonmetals can be extracted profitably are called—

Which statement is correct?

Galena (PbS) is the ore of—

Bauxite is called the mineral (not ore) of aluminium because—

Iron pyrites has the formula—

Hematite is—

Magnetite is—

Limonite has the formula—

Cinnabar is the ore of—

Cinnabar's formula is—

Zinc blende has the formula—

Calamine is—

Copper pyrites is—

Chalcocite (celcoisite) has the formula—

Bauxite has the formula—

White clay/kaolin mineral is found on the surface at—

The sand of Cox's bazaar sea beach contains—

Halogen minerals are mainly available in—

Chromite ore has the formula—

Rutile is the ore of—

The process of obtaining metals from ores is called—

Non-reactive metals like gold and platinum are usually found—

Reactive metals are usually found as—

Which is NOT a step of metal extraction?

The first step in metal extraction (after mining) is—

Big stones of ore are first crushed in—

Powder/small lattice particles of ore are produced in—

The unwanted substances mixed with ore are called—

Hydrolytic method is usually applied to—

In hydrolytic concentration, heavier ore particles—

Froth floatation method is generally used for—

In froth floatation, the sulfide ore—

In froth floatation impurities—

Magnetic separation works because either ore or gangue is—

Chromite is concentrated by—

Bauxite is concentrated by—

The reagent used to dissolve $\mathrm{Al_2O_3}$ from bauxite is—

$\mathrm{Al_2O_3 \cdot 2H_2O + 2NaOH \xrightarrow{1500\text{-}2000\,^{\circ}C} ?}$

$\mathrm{NaAlO_2 + 2H_2O \to ?}$

$\mathrm{2Al(OH)_3 \xrightarrow{1100\,^{\circ}C} ?}$

Heating a concentrated ore below its melting point in absence of air is called—

Heating a sulfide ore below its melting point in presence of air is called—

$\mathrm{Fe_2O_3 \cdot 3H_2O \xrightarrow{\Delta} ?}$

$\mathrm{CaCO_3 \xrightarrow{\Delta} ?}$

$\mathrm{2PbS + 3O_2 \xrightarrow{\Delta} ?}$

$\mathrm{2ZnS + 3O_2 \xrightarrow{\Delta} ?}$

The most reactive metals K, Na, Ca, Mg, Al are extracted by—

Mid-level reactive metals (Zn, Fe, Sn, Pb) are extracted by—

Less reactive metals like Cu, Hg, Ag are extracted by—

Pt and Au are usually—

Pure aluminium oxide melts at—

The formula of cryolite is—

Adding cryolite to $\mathrm{Al_2O_3}$ lowers the melting point to—

In aluminium electrolysis, the steel container with graphite layer acts as—

In aluminium electrolysis, the carbon rods act as—

Anode reaction in aluminium electrolysis is—

Cathode reaction in aluminium electrolysis is—

$\mathrm{ZnO + C \xrightarrow{\Delta} ?}$

$\mathrm{FeO + C \xrightarrow{\Delta} ?}$

$\mathrm{CuO + C \xrightarrow{\Delta} ?}$

$\mathrm{HgS + O_2 \xrightarrow{\Delta} ?}$ (auto-reduction)

In auto-reduction of HgS, no separate reductant is required because—

The chief ore of iron used in extraction is—

Iron is extracted in—

The flux used in iron extraction is—

$\mathrm{3Fe_2O_3 + CO \to ?}$

$\mathrm{Fe_3O_4 + CO \to ?}$

The slag formed in blast furnace is—

$\mathrm{CaO + SiO_2 \to ?}$

A substance added to remove impurities from molten metal is called—

If the impurity is alkaline (basic), the flux added is—

If the impurity is acidic, the flux added is—

Slag is separated from molten metal because slag is—

Copper from carbon reduction has purity of about—

Copper purity after electrolytic refining reaches—

In electrolytic refining of copper, the anode is—

In electrolytic refining of copper, the cathode is—

The electrolyte used in copper refining is—

At the anode of copper refining, the reaction is—

At the cathode of copper refining, the reaction is—

An alloy is—

The Bronze Age refers to which period?

Bronze is an alloy of—

Composition of bronze (approx)—

Brass is an alloy of—

Composition of brass (approx)—

Steel is an alloy of—

Composition of steel (approx)—

Stainless steel composition (approx)—

Surgical/operation tools, knives, kitchen sinks are commonly made of—

Duralumin contains (approx)—

Body of airplanes is made of—

Brass is used mainly in—

24 carat gold contains—

22 carat gold contains—

21 carat gold contains—

Which sample of gold is hardest?

The "representative metal" of an alloy is the one—

The reddish-brown substance formed on iron exposed to air is called—

The chemical formula of rust is—

Rusting of iron requires—

In the rusting process, iron first becomes—

Final hydrated oxide formed in rust is written as—

Copper exposed to air for long forms a green/brown layer called—

Copper slag may contain—

Coating zinc on iron is called—

Galvanizing—

Coating a less reactive metal on a more reactive metal by electrolysis is called—

In electroplating copper on iron, the iron object is connected to—

In electroplating copper on iron, the copper rod is connected to—

Electrolyte for electroplating copper on iron is—

Which is NOT a method of preventing metal corrosion?

Iron doors and windows are painted to—

Recycling of metals is needed because—

About what percentage of copper used in America is recycled?

About what percentage of aluminium used in Europe is recycled?

Sulfur is a—

The melting point of sulfur is—

Sulfur is extracted from underground mines by—

The Frasch pipe consists of—

In Frasch method, super-heated water is at temperatures—

Hot air pressure used in Frasch method is approximately—

Sulfur melts because super-heated water is at temperature—

Which is NOT a use of sulfur?

Vulcanization makes rubber—

Sulfanilamide drugs—

$\mathrm{S + O_2 \to ?}$

$\mathrm{SO_2}$ is a gas with—

$\mathrm{SO_2 + H_2O \to ?}$

The acid responsible for acid rain (from burning S-containing fuels) is—

$\mathrm{SO_2}$ is called an acidic oxide because—

Sulfuric acid is called—

Industrial preparation of $\mathrm{H_2SO_4}$ is by—

In Contact method, step 1 is—

Catalyst used in Contact method is—

Optimum temperature in Contact method (catalytic chamber) is—

$\mathrm{2SO_2 + O_2 \xrightarrow{V_2O_5} ?}$

Why is $\mathrm{SO_3}$ NOT directly absorbed in water?

$\mathrm{SO_3}$ is first absorbed in concentrated $\mathrm{H_2SO_4}$ to form—

The formula of oleum is—

$\mathrm{H_2S_2O_7 + H_2O \to ?}$

Which property is NOT shown by dilute $\mathrm{H_2SO_4}$?

Concentrated $\mathrm{H_2SO_4}$ shows—

$\mathrm{H_2SO_4 + Ca(OH)_2 \to ?}$