List of practice Questions

The minimum anion-to-cation radius ratio at which a 3-fold coordination becomes possible is ............. [round off to 2 decimal places]
The mole fraction of jadeite in the pyroxene of composition (Ca$_{0.667}$Na$_{0.333}$Fe$^{2+}_{0.12}$Fe$^{3+}_{0.125}$Mg$_{0.546}$Al$_{0.208}$)Si$_2$O$_6$ is .................. [round off to 3 decimal places]
Which of the following options represent(s) simultaneous crystallization of two minerals in the given feature(s)?
Which of the following textures suggest(s) post-kinematic growth of the mentioned mineral?
In a drainage basin, the number of the 1st, 2nd, 3rd, 4th and 5th order streams are 240, 40, 8, 2 and 1, respectively. The average of all calculated bifurcation ratios is ............... [round off to 2 decimal places]
A sandstone follows Mohr-Coulomb failure criterion. If the uniaxial compressive strength and the angle of the internal friction of the sandstone are 7 MPa and \(30^\circ\), respectively, the calculated cohesion of the rock is ................ MPa. [round off to 2 decimal places]
At a certain depth in the crust, the maximum and minimum principal compressive stresses are 150 MPa and 75 MPa, respectively, which lead to normal faulting. If the average density of the crust is 2700 kg/m$^3$, the crustal depth of fracture initiation according to Anderson's theory of faulting is ................ km. (g = 10 m/s$^2$) [round off to one decimal place]
A cylindrical soil sample of 10 cm diameter is tested in a constant-head permeameter. A volume of 250 cm$^3$ of water is collected in 5 minutes when the constant-head difference between tapping points 15 cm apart is 5 cm. Considering Darcy flow, the absolute value of coefficient of permeability in cm/s is .............. ($\pi = 3.14$) [round off to 3 decimal places]
The ratio of bridging to non-bridging oxygen atoms in the amphibole structure is:
Based on the three statements given below, choose the CORRECT option. Statement I: Gigantopithecus is a genus of the family Hominidae.
Statement II: Equus is a living genus of the family Equidae.
Statement III: Gomphotherium is a genus belonging to the order Proboscidea.
In porphyry copper deposits, the order of alteration zones from the intrusive body outwards is:
Which is the CORRECT sequence of ore minerals in their increasing order of reflectance?
Which of the following stratigraphic successions is/are arranged in CORRECT chronological order?
Match the following fossil taxa in Group I with their corresponding features in Group II. \begin{center} \begin{tabular}{p{0.35\linewidth}p{0.35\linewidth}} Group I & Group II
P. Bryozoa & 1. Denticles
Q. Ostracoda & 2. Chamber
R. Foraminifera & 3. Carapace
S. Conodont & 4. Zooid
\end{tabular} \end{center}
Based on the three statements given below, choose the CORRECT option. Statement I: Echinoids have water vascular system.
Statement II: Delthyrium and pedicle foramen are found in the brachial valve of brachiopods.
Statement III: Cardinal teeth, adductor muscles and chondrophore are found in bivalves.
The total number of symmetry elements in the crystal class represented by the point group 4/m3 2/m is:
The amount of Fe in a sample of 25 g of pyrrhotite (FeS) is $\underline{\hspace{1cm}}$ g. (Atomic wt. of Fe = 55.85 and S = 32.06) [round off to 2 decimal places]
The rate of spreading about a symmetric spreading center at the middle of a 4000 km wide sea is 40 mm/year. The spreading began $\underline{\hspace{1cm}}$ million years before present. [in integer]
A vertical aerial photograph is obtained over flat terrain with a 30 cm focal-length camera lens from an altitude of 18288 m. If the width of a dolerite dyke on this vertical photograph is 2 mm, its actual width on the terrain is $\underline{\hspace{1cm}}$ m. [round off to 2 decimal places]
The decay constant of a radioactive isotope is \(1.21\times 10^{-4}\ \text{year}^{-1}\). The half-life of the isotope is $\underline{\hspace{3cm}}$ years. [round off to nearest integer]
All the faces of an octahedron can be collectively symbolized by:
Shallow-focus earthquakes with tensional focal mechanism are characteristic of:
90% of the bulk Earth is constituted of Fe, Si, O and:
Which of the following is/are slope stabilization method(s)?
In which one of the given mass extinction events, global cooling that resulted in glaciation and lowering of sea level, is considered as the major cause of extinction for more than 50% of marine fauna?