List of top Questions asked in IIT JAM GG- 2021

The weight loss during the conversion of 1 mole of gypsum to anhydrite is ________. (Atomic weights: Ca = 40.0, S = 32.0, O = 16.0, H = 1.0) (Round off to two decimal places.)

A bed with an attitude 020°, 30° NW is rotated 55° counter-clockwise (looking northerly) along its strike line. The dip of the bed after rotation will be _______° NW. (Answer in integer.)

The width of the outcrop of a fault zone on a flat surface is 100 m. A vertical borehole through the fault zone measured its vertical thickness to be 80 m. The true thickness of the fault zone is ________ m. (Round off to two decimal places.)
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In an oblique slip fault with an attitude 000°, 30° E, the net slip vector has a length of 20 m and a rake of 30° S on the fault plane. The displacement of a horizontal bed along the fault trace in a plane perpendicular to the strike of the fault is ________ m. (Answer in integer.)

If the activity of a radioactive mineral falls from 800 counts/s to 500 counts/s in 80 minutes, the half-life of the mineral is ________ minutes. (Round off to two decimal places.)

Choose the CORRECT statement(s) out of the following.

A marine organic-rich, black shale with tiny pyrite crystals shows complete absence of body or trace fossils. Which of the following statement(s) is/are TRUE?

Which among the following statement(s) is/are TRUE?

Which of the following statement(s) regarding hydrocarbon occurrence is/are CORRECT?

Following are the statements regarding types of sandstone as per Pettijohn’s classification. Which is/are the CORRECT statement(s) out of the following?

Which one of the following statements is FALSE?

Fossils from which of the following invertebrate classes show pentameral symmetry?

The attitude of the two limbs of a fold was measured as striking 4° N, dipping 85° easterly and striking 30° N, dipping 60° easterly. Which of the following is/are TRUE for describing the geometry of the fold?

Which of the following statement(s) is/are CORRECT regarding ophitic texture?

Which one of the following statements is FALSE?

In the context of phylogeny of horses, the CORRECT chronological order from old to young is

Find the CORRECT statement out of the following.

Which one of the following crystal forms DOES NOT belong to the di-tetragonal pyramidal class?

If a coarse-grained igneous rock is composed of >90% of plagioclase and <10% of olivine and pyroxene, then the name of this rock according to the IUGS classification is

Which one of the following represents the compositional change in plagioclase during the crystallization of mafic magma?

Choose the CORRECT sequence of older to younger formations in the stratigraphy of the Cuddapah Supergroup.

Identify the plant fossil from the following list.

The igneous body with dome or mushroom-like shape is known as a

Which one of the following stratigraphic units belongs to the Cretaceous?

Select the youngest volcanic event out of the following.