CDS 2026 Geography Hydrosphere — Oceans, Rivers and Water Cycle Previous Year Questions

Consider the following statements regarding ocean currents :

1. Difference in water density is the main cause for the formation of ocean currents.
2. Density of water depends on temperature, salinity and pressure.
3. As a rule, ocean waters move from areas of higher density to areas of lower density as a current.
   Which of the statements given above is/are correct ?

Consider the following statements about the Sargasso Sea :

1. It is the only sea without a land boundary.
2. The Sargasso Sea records the lowest salinity in the Atlantic Ocean.
   Which of the statements given above is/are correct ?

Match List-I with List-II and select the answer using the codes given below the Lists :
List-I (Type of Tide)
A. Spring Tides
B. Neap Tides
C. Apogean Tides
D. Equinoctial Spring Tides

List-II (Characteristic)

1. Low tides caused when the Sun, Earth and Moon are in the position of quadrature
2. Occur when the Moon is the farthest from the Earth
3. Tides recurring at an interval of six months
4. Very high tides caused when the Sun, Moon and Earth are almost in the same line

Which one of the following rivers is also known by the name of "Dihang" in Northeast India ?