TEST-1 : GENERAL GEOLOGY AND RADIOACTIVITY
GENERAL GEOLOGY AND RADIOACTIVITY
MCQ (1 Mark)
1) The acceleration due to gravity 'g' is maximum at ______
A. Pole
B. Equator
C. Centre
D. Surface Of Earth
2) In which of the following setting, the geothermal gradient is maximum?
A. Subduction ZonesB. Mid oceanic ridges
C. Precambrian shield
D. Collisional orogens
3) In Beta Negatron Decay ______
A. Z is increased by 2
B. Z is increased by 1
C. N is increased by 2
D. N is increased by 1
4) Pyrolite is a hypothetical upper mantle rock consisting of peridotite and Basalt in the ratio of ______
A. 1:3
B. 2:1
C. 3:1
D. 1:2
5) Transformation of a Neutron to a Proton and electron occurs in ______ type of decay?
A. Beta Positron Decay
B. Alpha decay
C. Electron Capture decay
D. Beta Negatron Decay
6) Which of the following planet has the highest bulk density?
A. Jupiter
B. Uranus
C. Mars
D. Neptune
7) Which of the following dating method is used as Zircon dating?
A. Sm-Nd
B. Os-Re
C. U-Pb
D. K-Ar
8) Arrange the sequence of following system in increasing order on the basis of their size.
A. Solar system < Universe < Galaxy < Planet < Archiopelago
B. Planet < Solar system < Galaxy < Archiopelago < Universe
C. Universe < Galaxy < Planet < Archiopelago < Solar system
D. Planet < Solar system < Galaxy < Universe < Archiopelago
9) The first outer shell of sun is ______ and second outer shell of sun is ______ respectively?
A. Sunspot and Photosphere
B. Photosphere and Chromosphere
C. Chromosphere and Photosphere
D. None of the above
10) Match the following planets with their corresponding density?
Planets | Density |
A. Mercury | 1. 3.9 gm/cc |
B. Venus | 2. 5.2 gm/cc |
C. Mars | 3. 5.4 gm/cc |
D. Jupiter | 4. 1.4 gm/cc |
Ans : A-3, B-2, C-1, D-4
MCQ (2 Marks)
MCQ (2 Marks)
11) Which of the following statement is incorrect?
A. H and He are most abundant in the solar system
B. Tc and Pm don’t occur naturally in our solar system because all of their isotopes are unstable
C. Abundace of Li,Be and B are anomalously higher than other elements
D. Abundance of Fe is anomalously higher than other elements having similar atomic number
12) Which one of the following parent-daughter systems has the shortest half life?
A. Sm-Nd
B. Rb-Sr
C. K-Ar
D. 235U-Pb
13) Earth's Magnetic field generates due to ______
A. Crust
B. Upper mantle
C. Inner Core
D. Outer Core
14) Which type of Heat transfer is basically seen in case of Asthenosphere?
A. Conduction
B. Radiation
C. Convection
D. Advection
15) New seafloor is created at a ______
A. subduction zone
B. transform fault
C. mid-ocean ridge
D. deep sea trench
16) Match the following.
Term | Description |
Smallest Satellite | Makemake |
Largest Satellite
| Deimos |
Least densest Planet | Saturn |
Dwarf Planet | Ganymede |
17) Which of the following wave shows horizontal motion to the direction of propagation?
A. P-Wave
B. S-Wave
C. L-Wave
D. R-Wave
18) The volcano having basaltic composition having convex upward profile with a gentle slope is known as ______
A. Composite volcano
B. Shield Volcano
C. Domes
D. Scoria Cones
19) Uranium-238 decays to which of the following daughter isotopes?
A. Rubidium-87
B. Uranium-235
C. Lead-206
D. Nitrogen-14
20) Which of the following element is abundant in Bulk Earth?
A. Si
B. Fe
C. Mg
D. Al
21) The Bulk Silicate Earth (BSE) is best approximated by the average
A. enriched upper mantle composition
B. mantle and continental crust composition
C. depleted mantle composition
D. primitive upper mantle composition
22) Which of the following isotopes would be the most useful to study the Earth process that has a time scale of 1000 years?
A. 210Pb (half-life ~ 22 years)
B. 3H (half-life ~ 12.5 years)
C. 40K (half-life ~ 118 million years)
D. 14C (half-life ~ 5740 years)
23) The conversion of Ringoodite to Perovskite occurs at the depth of
A. 2900km
B. 670 km
C. 410 km
D. 510 km
24) Widmastatten Texture mainly found in ______
A. Stony Meteorites
B. Iron Meteorites
C. Stony-Iron Meteorites
D. None of the above
25) Which of the following is a major element in stable continental crust?
A. Hf
B. U
C. K
D. Pb
26) The difference between equitorial diameter and Mean radius of Earth is ______ Km
A. 8520
B. 6385
C. 3585
D. 2385
27) The oldest geomagnetic Epoch is ______
A. Gauss
B. Matuyama
C. Brunhes
D. Gilbert
28) The H/He ratio in Solar system is ______
A. 8.5
B. 12.5
C. 14.5
D. 3.5
29)Which one of the following phases is P-wave that converts to S- wave during passage through the solid inner core?
A. PKIKP
B. PKJKP
C. PKIKP
D. PcP
30) Which one of the following layers of the Earth has the least volume?
A. Upper Mantle
B. Lower Mantle
C. Inner Core
D. Sima
MSQ (2 Marks)
31) Mark the correct statements.
A. In Alpha decay both Z and N decreased by 2
B. In Beta Positron decay Z increased by 1
C. In Beta Negatron decay N increased by 1
D. In Beta positron decay Z decreased by 1
32) Mark the incorrect statement.
A. Ozone layer found in case of Mesosphere
B. In Troposphere and Thermosphere temperature rises with increasing altitude
C. Stratosphere is the Coldest layer
D. Aurora and satellite occurs in Troposphere
33) Mark the correct statement.
A. The velocity is highest in case of Pacific plate
B. Slab pull force operates below the trench in the Subduction zone
C. Ridge pull force operates at Oceanic ridge and acts on the edges of Spreading plates
D. Thickest crust in found in case of Continent-Continent Collision
34) Oxygen is most abundant element in ______
A. Crust
B. Bulk Earth
C. Mantle
D. Core
35) Which of the following planets don't show retrograde rotation?
A. Venus
B. Mars
C. Earth
D. Uranus
36) Which of the following statements are not true regarding Airy's model of isostasy?
A. (A) requires mountains to have higher density than the oceanic crust
B. (B) requires mountains to have lower density than the oceanic crust
C. (C) requires mountains to have the same density as oceanic crust
D. (D) Root and anti-root concepts are used
37) Choose the correct statement.
A. Venus has no satellite
B. Himalayan is found in Continental Collision
C. Pelean is one of the most violent type of volcano
D. Shadow zone of P-wave is 103-143
38) Mark the correct statement.
A. Gilbert is the youngest geomagnetic epoch
B. Brunhes is the Youngest geomagnetic epoch
C. Isogonic lines are found in case of Magnetic Inclination
D. At Pole strength of magnetic field is 60,000 nT
39) P and S waves originate at earthquake focus and travel through the earth. Which of the following statements for these waves is/are incorrect?A. (A) S-wave shadow zone is 154° wide
B. (B) P-wave shadow zones are 49° wide
C. (C) P-wave velocity abruptly increases downward at mantle-core boundary
D. (D) P-wave velocity abruptly drops downward at mantle-core boundary
NAT (1 Mark)
41) The travel time difference between the arrival times of a shear wave (S) and primary wave (P) observed on a seismogram recorded at an epicentral distance of 100 km from a near surface earthquake is ...... s. (Assume the average P and S-wave velocities to be 6.0 km/s and 3.5 km/s, respectively) [round off to two decimal places]
42) A radiogenic isotope has a half-life of 1hour and we have 1000 atoms of that particular isotope in a particular system at a particular time. How much atoms of that isotope will be there after 6 hours? (Answer in two decimals)
43) The abundance of 234U in secular equilibrium with its parent 238U will be ______ x10^3%. (Given Half-life (T1/2) of 238U and 234U are 4.467×10^9 y and 2.44x10^5 y, respectively, and abundance of 238U is 99.28%) (round off to 2 decimal places)
44) A radioactive isotope decay A to isotope B with a half life of 1000yr. If the initially 500 atoms of A were present, then how many atoms of A and B are present after 2000 years.
45) Using Airy’s hypothesis, calculate the thickness of the root beneath a 4 km high mountain in isostatic equilibrium with a 40 km thick continental crust of density 2800 kg/m3 and a mantle of density 3300 kg/m3. Express your answer in km.(Round off to one decimal place)
46) The difference in alpha and Beta particles emitted when 238U92 decays to 206Pb82.
47) A P-ray arrives at the mantle-core boundary at an angle 25º with respect to the normal. At what angle to the normal does it enter the core? (P-wave velocity in the lower mantle is 13.7 km/s and outer core is 8.1 km/s) (Round off to two decimal places)
48) A drainage basin of fourth order covers an area of 35 km2. Within the basin, the total lengths of the 1st order, 2nd order and 3rd order drainages are 11.5 km, 8.5 km and 4.2 km, respectively. If the drainage density of the basin is 0.8 km-1, the total length of the 4th order drainage is ______ km.[round off to one decimal place]
49) Let X is a radioactive nucleus of mass 87 and atomic number 37. It decays through an alpha decay then two Beta decay after its gone through an Electron capture decay now what is the mass of the Nuclei.
50) The Eh value for the upper limit of natural water stability at pH 5.6 is approximately ______ V (to three decimal places).
NAT (2 Marks)
51) The mass of the Earth is 80 times that of the Moon, while the radius of the Earth is four times that of the Moon. The surface gravity of the Earth is ______ times that of the Moon? (Provide your answer as an integer.)
52) The concentration of solute in the mobile phase is 5ppm and 7ppm in the stationary phase. Compute the partition Co-efficient(Kd)between crystal and Magma. (Answer upto 1 decimal)
A basaltic lava flow is found to have a 87Sr/87Sr ratio of 0.720 and a 87Rb/86Rb ratio of 0.750 . If the initial 87Sr/86Sr value is determined to be 0.704 , What is the age of the flow ______ 10° years.
53) Considering the Airy isostatic compensation for a mountain having elevation of 2.0 km above the mean sea level at a point P, the thickness of its root below P would be ______ km. (consider densities of crustal rocks and upper mantle as 2.7 gcm-3 and 3.3 gcm-3 respectively)
54) A pulse of sediment-laden runoff is delivered to a pit. How long will it take for soil particles with a diameter of 5×107(-2)mm to settle to a depth of one meter of water? (Provide your answer in minutes, rounded to two decimal places).
55) The ratio of the number of daughter nuclides to the number of parent nuclides after period of 3 half lives is ______. (Answer in integer)
56) In a drainage basin , the length of first, second, third and fourth order streams are 37km,22km,10km and 1km respectively. Calculate the drainage density (in km∧-1) if the basin covers an area of 60km2. (Answer upto three decimal)
57) If at a particular depth, the primary wave velocity is 11.5 km/s, the shear wave velocity is 6.5 km/s, and the density is 5.0×103kg/m3, then the bulk modulus of the rock at that depth will be ______. Gpa (Answer off to 2 decimals)
58) A rock element, during deformation, experienced a pressure change of 5×104N/m2, due to which its volume changed from 4 cm3 to 3.9 cm3. The bulk modulus of the rock is ______ × 10∼6 N/m2. (In integer)
59) The slope of the Wadati plot obtained using the P and S arrival times of a local earthquake is 1.0. The corresponding Vp/Vs. ratio of the sub-surface medium is ......
60) If 15% partial melting enriches the melt in an incompatible element resulting C1/Co ratio of 1.375, Then calculate the bulk distribution coefficient of that element assuming batch melting process. (Answer off to two decimal) write in a good way
x
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