Question 16 - Teachoo Sample Paper - Social Science Class 9 - Paper 2 - Teachoo Sample Paper - Social Science Class 9

“P” gave his friend clues about a type of river that flows through a rift valley and forms waterfalls.  Which of the following clues provided by "P" would be most useful in  identifying the ideal type of river?

Clues:

1. It is one of the longest westward-flowing rivers of India.

2. It forms the Marble Rocks near Jabalpur.

3. It drains into the Gulf of Khambhat.

4. It flows parallel to another river in the same rift valley.

OPTIONS

1. Clue i

2. Clue i and ii

3. Clue i and iii

4. Clue i, ii and iii

Answer:

Answer by Student

So, the correct answer is (B): Clue i and ii

Detailed Answer by Teachoo

Let’s check all the clues and see which ones are useful in identifying the type of river.

• Clue i: It is one of the longest westward flowing rivers of India. This clue is useful because it narrows down the possible rivers to only a few that flow westward in India. Most of the rivers in India flow eastward or southward into the Bay of Bengal or the Indian Ocean. Some of the westward flowing rivers are Narmada, Tapti, Mahi, Sabarmati, and Luni.
  
  
• Clue ii: It forms the Marble Rocks near Jabalpur. This clue is very useful because it identifies the specific river that forms this natural wonder. The Marble Rocks are a gorge along the Narmada River in Madhya Pradesh, where the river has carved out soft marble rocks into beautiful shapes and colors. The Marble Rocks are also known for the Dhuandhar Falls, where the river plunges down from a height of 30 meters, creating a misty spray.
  
  
• Clue iii: It drains into the Gulf of Khambhat. This clue is not very useful because it applies to more than one river that flows westward in India. The Gulf of Khambhat, also known as the Gulf of Cambay, is an inlet of the Arabian Sea on the west coast of India. Several rivers drain into it, such as Narmada, Tapti, Mahi, Sabarmati, and Daman Ganga.
  
  
• Clue iv: It flows parallel to another river in the same rift valley. This clue is also not very useful because it applies to more than one river that flows westward in India. The Narmada and Tapti rivers flow parallel to each other in the same rift valley, which is called the Narmada-Son Lineament. This rift valley was formed by a geological fault that runs across central India.
  
  Thus, the correct answer is option (B): Clue i and ii