Chemistry (Part-IV)

31. Malachite is an ore/mineral of _______ . [S.S.C. Online CHSL (T-I) 11.01.2017]

(a) Lead
(b) Manganese
(c) Mercury
(d) Copper

Correct Answer: (d) Copper

Solution:Malachite [Cu₂CO₃(OH)₂] is an ore of copper. It is one of the first ores to produce copper metal. Today it is of minor importance as an ore of copper, as this ore is usually produced in small quantities.

32. Chromite is an ore/mineral of_____________. [S.S.C. Online CHSL (T-I) 10.01.2017]

(a) Zinc
(b) Uranium
(c) Chromium
(d) Titanium

Correct Answer: (c) Chromium

Solution:Chromium is the metal obtained from the ore/mineral chromite. Chromite is a chromium iron oxide mineral with the chemical formula FeCr₂O₄.

33. Haematite is an ore/mineral of _______ . [S.S.C. Online CHSL (T-I) 9.01.2017 ]

(a) Zinc
(b) Iron
(c) Lead
(d) Manganese

Correct Answer: (b) Iron

Solution:Iron is the metal extracted from the ore/mineral haematite. Haematite is a common iron oxide mineral with the chemical formula Fe₂O₃ and is typically reddish-brown.

34. Magnetite is an ore/mineral of________. [S.S.C. Online CHSL (T-I) 16.01.2017]

(a) Beryllium
(b) Chromium
(c) Iron
(d) Lead

Correct Answer: (c) Iron

Solution:Iron is also the metal for which magnetite is a significant ore/mineral. Magnetite is another iron oxide mineral with the chemical formula Fe₃O₄ and is known for its strong magnetic properties.

35. Which of the following is NOT an ore of iron? [S.S.C. Online Graduate Level (T-I) 5.03.2020]

(a) Cuprite
(b) Hacmatite
(c) Magnetite
(d) Siderite

Correct Answer: (a) Cuprite

Solution:Cuprite is NOT an ore of iron. Cuprite is a copper oxide mineral with the chemical formula Cu₂O and is an ore of copper. Haematite, magnetite, and siderite are all important ores of iron. Siderite is iron(II) carbonate (FeCO₃).

36. Cinnabar is an ore/mineral of ________. [S.S.C. Online CHSL (T-I) 15.01.2017]

(a) Lead
(b) Manganese
(c) Molybdenum
(d) Mercury

Correct Answer: (d) Mercury

Solution:Mercury is the metal obtained from the ore/mineral cinnabar. Cinnabar is a mercury sulfide mineral with the chemical formula HgS and is typically bright red.

37. Cinnabar is the ore of which of the following metals? [S.S.C. Online M.T.S. (T-I) 26.10.2021]

(a) Platinum
(b) Gallium
(c) Mercury
(d) Gold

Correct Answer: (c) Mercury

Solution:Mercury is the metal for which cinnabar is the primary ore. As mentioned earlier, cinnabar is mercury sulfide (HgS).

38. Cinnabar (HgS) is an ore of which metal? [S.S.C. Online CHSL (T-I) 13.10.2020]

(a) Silver
(b) Mercury
(c) Aluminium
(d) Gold

Correct Answer: (b) Mercury

Solution:Mercury is the metal whose ore is cinnabar (HgS). It's the most common and important source of mercury.

39. Molybdenite is an ore/mineral of _______. [S.S.C. Online CHSL (T-I) 16.01.2017]

(a) Molybdenun
(b) Nickel
(c) Silver
(d) Tin

Correct Answer: (a) Molybdenun

Solution:Molybdenum is the metal obtained from the ore/mineral molybdenite. Molybdenite is a molybdenum disulfide mineral with the chemical formula MoS₂ and is the primary source of molybdenum.

40. Which of the following options is not a metal? [S.S.C. Online MTS (T-I) 6.08.2019]

(a) Copper
(b) Iron
(c) Tin
(d) Selenium

Correct Answer: (d) Selenium

Solution:Selenium is NOT a metal. Selenium is a non-metal, specifically a metalloid or semi-metal, meaning it has properties intermediate between those of metals and non-metals. Copper, iron, and tin are all metallic elements.