Geochemistry Quiz


Q1 : Which planet is a exceptional case of Bode’s law :
(a) Mars
(b) Saturn
(c) Uranus
(d) Neptune.

Q. 2 : Mark the correct statement about mercury planet :
(a) Hydrogen is abundant in its atmosphere.
(b) Helium is abundant in its atmosphere.
(c) Nitrogen and carbon are abundant in its atmosphere
(d) Lt has no atmosphere.

Q. 3: Siderites consist essentially of a :
(a) Nickle - iron alloy
(b) Nickle-iron alloy and silicates
(c) Silicates only
(d) Silicates and graphite’s.

Q. 4 : Aerolites are :
(a)  Iron meteorites,
(b) lron-stony meteorites.
(c) Stony meteorites.
(d) Metallic meteorites.

Q. 5 : Tektites resembling :
(a) The Obsidian
(b) The basalt
(c) The rhyolites
(d) The granochiorite. 

Q. 6: An element is characterised by the:
(a) Number of protons in its nucleus
(b) Number of neutrons in its nucleus
(c) Number of neutrons and electrons
(d) None of these.
ANSWER :( a)

Q. 7: The upper layer in the crust is rich in:
(a) Silicon and lron
(b) Silicon and Aluminium
(c) Iron and magnesium
(d) Silicon and magnesium

Q.8: Picrolite rock which is found in the upper crust is a mixture of:
(a)  One part of basalt and three parts of Dunite
(b) Half part of basalt and half part of Dunite
(c Three parts of basalt and one part of Dunite
(d) Basalt and granite.
ANSWER : (a)

Q. 9: Picrolite is a:
(a) Pyroxene - olivine rock
(b) Pyroxene -garnet rock
(c) Olivine - Plagioclase rock
(d) Pyroxene - Plagioclase rock.

Q. 10: Clarke is the:
(a) Dispersed elements in the earth’s crust
(b) Average percentage of an element in the earth’s crust.
(c) Distribution of a particular element between two phases.
(d) Bulk composition of earth.

Q. 11: The factor Clarke of concentration is useful in the consideration of the:
(a) Migration of the elements
(b) Migration and deposition of the elements
(c) Deposition and diagenesis of the elements
(d) Distribution ofthe elements

Q. 12: Who was introduced the term siderophile, Chaleophile lithophile and atrophied
(a) Goldschmidt (1923)
(b) Clarke (1924)
(c) Ringwood (1975)
(d) Cameron (1937)

Q. 13 : Some elements show affinity for more than one group because the distribution of
any element is dependent to some extent on :
(a) Temperature
(b) Pressure
(c) The chemical environment of the system as a whole.
(d) All the above.

Q. 14: The geochemical character of an element is largely governed by the:
(a) Number of proton in the nucleus
(b) Number of neutrons in the nucleus
(c) Electronic configuration of its atoms.
(d) All the above.

Q. 15: Accretion hypothesis states that the earth’s atmosphere was formed by the:
(a) Release of gases occluded and chemically combined in the solid particles.
(b) Release of gases from the oceanic water
(c) Formation of the minute gas particles release from the magnetic water.
(d) None of these.

Q. 16: ln inert gases the bond is:
(a) Metallic bond
(b) Ionic bond
(c) Covalent bond
(d) Van deer Waal’s bond.

Q. 17: Siderites are:
(a) Stony meteorites
(b) Stony-irons meteorites.
(c) Irons meteorites
(d) Copper meteorites.

Q. 18 : Widmanstatten figure are associated with :
(a) Tektites
(b) Aerolites
(c) Siderolites
(d) Siderites.

Q. 19 : Chondrites are consisting primarily of :
(a) Olivine only
(b) Pyroxene only
(c) Olivine and/or pyroxene
(d) lron and Nickle.

Q. 20: Different elements with the same neutron number but with different values of atomic
Weight and protons are known as:
(a) Isotopes
(b) Isobars
(c) Isotones
(d) Isotherm

Q.21: The upper mantle having:                
(a)  Granitic composition
(b) Basic composition
(c) Ultrabasic composition
(d)Felsic composition

Q. 22: The upper crust of the earth consists mainly of:
(a) Sandstone
(b) Shales
(c) Limestones
(d) Igneous and metamorphic rocks

Q. 23: The Clarke oxygen in the crust is:
(a) 46.60
(b) 32.70
(c) 27.72
(d) 10.25

Q. 24: Match the following:
l                               ll
1. Siderophile           (i) Sulfides
2. Chaleophile          (ii) Silicates
3. Lithophile              (iii) Metallic irons.
4. Atmosphere        (iv) Atmosphere.
(a) 1-ii, 2-iii, 3-i, 4-iv
(b) 1-iii, 2-ii, 3-iv, 4-i.
(c) 1-iii, 2-i, 3-ii, 4-iv
(d) 1-iv, 2-ii, 3-iii, 4-i

Q. 25: Chromium is a straggly lithophile element in the earth’s crust, but it is found as a
Chalcophilte in some meteorites because of:
(a) Oxygen rich 
(b) Oxygen deficiency
(c) Hydrogen deficiency
(d) Carbon deficiency