Test: A River's Tale - 1 - Class 4 MCQ

• A: Ravi


• B: Ganga


• C: Yamuna


• D: Krishna

• Delhi, the capital city of India, is built around the Yamuna River.


• The Yamuna River is one of the major rivers in India and is considered sacred in Hinduism.


• It flows through the northern part of India and passes through Delhi before merging with the Ganga River in Allahabad.


• The Yamuna River has been a lifeline for Delhi, providing water for irrigation, drinking, and other purposes.


• Many historical monuments and landmarks in Delhi are located along the banks of the Yamuna River, showcasing the importance of this river in shaping the city's history and culture.

• Answer: d

• Water is a clear, colorless liquid when pure and in small quantities.


• When we look at a large body of water, such as an ocean or a lake, it can appear to have a blue or green color due to the reflection of the sky, the presence of algae, or other factors.


• However, the actual color of water itself is a very faint blue hue, which can be seen in large bodies of water where the water is deep and the reflection of the sky is not as strong.


• Therefore, the color of pure water is a very light blue, almost transparent, but it may appear colorless in small quantities.

So, the correct answer is option D: Light Blue.

• Yamuna River: The Yamuna River is considered the most polluted river in India due to high levels of untreated sewage, industrial waste, and agricultural runoff.


• Reasons for Pollution: The pollution in the Yamuna River is mainly caused by the discharge of untreated sewage from cities like Delhi, industrial effluents, and agricultural chemicals.


• Impact on Environment: The high levels of pollution in the Yamuna River have led to a decline in water quality, loss of aquatic life, and health hazards for people living along its banks.


• Government Initiatives: The government has taken various initiatives to clean up the Yamuna River, such as the Yamuna Action Plan and setting up wastewater treatment plants. However, the problem still persists.


• Need for Awareness: There is a need for increased awareness among the public about the importance of protecting rivers like the Yamuna and taking steps to reduce pollution.

• Dolphin: Dolphins are marine animals and are found in oceans, not rivers.


• Sloth: Sloths are land animals and are not typically found in rivers.


• Turtle: Turtles are aquatic animals that can be found in rivers.


• Duck: Ducks are waterfowl and are commonly found in rivers.

• Out of the given options, the animal that is not found in the river is Sloth.


• Sloths are slow-moving mammals that primarily inhabit trees in rainforests and are not adapted to living in water bodies like rivers.


• On the other hand, dolphins, turtles, and ducks are all animals that are commonly found in rivers, with dolphins being an exception as they are marine animals.


• Therefore, the correct answer is Sloth.

• Salt: Salt (sodium chloride) can dissolve in water because it is an ionic compound that easily breaks apart into its ions when in contact with water. The positive sodium ions and negative chloride ions are attracted to the polar water molecules, causing the salt to dissolve.

• Salty: Sea water is known to have a salty taste. This is due to the presence of dissolved salts such as sodium chloride, magnesium, and calcium in the water.


• Sweet: Sea water is not sweet. It is the opposite of sweet, as it has a salty taste.


• Sour: Sea water is not sour. It does not have acidic properties that would give it a sour taste.


• Tasteless: Sea water is definitely not tasteless. The salt content gives it a distinct salty taste.

Therefore, the taste of sea water is salty due to the presence of dissolved salts in it.

• Pacific Ocean: The Pacific Ocean is considered the most polluted ocean in the world due to the massive amount of plastic pollution it contains. It is estimated that over 80% of the plastic waste in the ocean comes from land-based sources, such as littering and improper waste disposal.


• Great Pacific Garbage Patch: One of the most infamous examples of pollution in the Pacific Ocean is the Great Pacific Garbage Patch, a massive collection of floating debris and plastic waste located between Hawaii and California. This patch is estimated to be twice the size of Texas and continues to grow due to ocean currents.


• Impact on Marine Life: The pollution in the Pacific Ocean has a devastating impact on marine life, with many animals becoming entangled in plastic debris or ingesting harmful materials. This can lead to a range of health issues and even death for marine creatures.


• Efforts to Combat Pollution: Various organizations and governments are working towards reducing pollution in the Pacific Ocean through initiatives such as beach cleanups, plastic bans, and recycling programs. However, the scale of the problem requires global cooperation and long-term solutions to effectively address the issue.

• Length: The Ganga River is the longest river in India, stretching over 2,525 kilometers.


• Importance: Ganga holds great cultural and religious significance in India, being considered sacred by Hindus.


• Source: The river originates from the Gangotri Glacier in the Himalayas.


• States: Ganga flows through several states in India, including Uttarakhand, Uttar Pradesh, Bihar, Jharkhand, and West Bengal.


• Population: Ganga supports a large population along its banks, making it a vital source of water for irrigation, transportation, and livelihoods.


• Biodiversity: The river is home to a diverse range of flora and fauna, supporting rich ecosystems.

• Kills germs and bacteria: Boiling water is one of the most effective ways to kill germs, bacteria, and other pathogens that may be present in water.


• Removes impurities: Boiling water helps to remove impurities such as chemicals, heavy metals, and other contaminants that may be harmful to health.


• Easy and cost-effective: Boiling water is a simple and cost-effective method that can be easily done at home without the need for any special equipment.


• Improves taste: Boiling water can also help improve the taste of water by removing any unpleasant odors or flavors that may be present.


• Safe for consumption: Boiled water is safe for consumption and can be used for drinking, cooking, and other household purposes.

• Kerala: Kerala is a state located on the southwestern Malabar Coast of India, bordered by the Arabian Sea.


• Goa: Goa is a state located on the western coast of India, along the Arabian Sea.


• Tamil Nadu: Tamil Nadu is a state located on the southeastern coast of India, along the Bay of Bengal.


• Madhya Pradesh: Madhya Pradesh is a state located in central India and is the only state mentioned that does not have a sea coast. It is landlocked and does not have any coastline along the Arabian Sea or the Bay of Bengal.

Therefore, the correct answer is Madhya Pradesh as it is the only state listed that does not have a sea coast.