Q1. Water has maximum density at Q1. Water has maximum density at
(A) 100 °C (A) 100 °C
(B) -40 °C (B) -40 °C
(C) 0 °C (C) 0 °C
(D) 4 °C (D) 4 °C
Answer: (D) 4 °C Answer: (D) 4 °C
Water has its maximum density at 4° Celsius (39.2° Fahrenheit), in its liquid phase. At this temperature, water's density is 0.9998395 grams per milliliter (g/ml). This is slightly less than 1 g/ml.
Water behaves abnormally at this temperature. When water is heated from 0° Celsius, its volume decreases until it reaches 4° Celsius. Above 4° Celsius, water's volume increases as the temperature increases. At 4° Celsius, the cage-like structure of water begins to break and come closer, which decreases the volume and increases the density. Water's solid phase, ice, is more buoyant and forms at the surface of bodies of water, where it freezes downward.Water has its maximum density at 4° Celsius (39.2° Fahrenheit), in its liquid phase. At this temperature, water's density is 0.9998395 grams per milliliter (g/ml). This is slightly less than 1 g/ml.
Water behaves abnormally at this temperature. When water is heated from 0° Celsius, its volume decreases until it reaches 4° Celsius. Above 4° Celsius, water's volume increases as the temperature increases. At 4° Celsius, the cage-like structure of water begins to break and come closer, which decreases the volume and increases the density. Water's solid phase, ice, is more buoyant and forms at the surface of bodies of water, where it freezes downward.
Q2. Which of the following schemes was launched in July 2019 to accelerate water harvesting and conservation measures in India? Q2. Which of the following schemes was launched in July 2019 to accelerate water harvesting and conservation measures in India?
(A) Jal Shakti Abhiyan (A) Jal Shakti Abhiyan
(B) Jal Vikas Abhiyan (B) Jal Vikas Abhiyan
(C) Jal Hi Dhan Hai Abhiyan (C) Jal Hi Dhan Hai Abhiyan
The Jal Shakti Abhiyan (JSA) was launched on July 1, 2019 by the Ministry of Jal Shakti (MoJS) to accelerate water conservation, harvesting, and bore well recharge activities in 256 water-stressed districts. The scheme's theme is "Sanchay Jal Behtar Kal".The Jal Shakti Abhiyan (JSA) was launched on July 1, 2019 by the Ministry of Jal Shakti (MoJS) to accelerate water conservation, harvesting, and bore well recharge activities in 256 water-stressed districts. The scheme's theme is "Sanchay Jal Behtar Kal".
Q4. When the earth is at its maximum distance from the sun it is said to be in Q4. When the earth is at its maximum distance from the sun it is said to be in
Q5. Which district has the lowest population density in Assam? Q5. Which district has the lowest population density in Assam?
(A) Dhemaji (A) Dhemaji
(B) Karimganj (B) Karimganj
(C) Dima Hasao (C) Dima Hasao
(D) Hailakandi (D) Hailakandi
Answer: (C) Dima Hasao Answer: (C) Dima Hasao
Dima Hasao district has the lowest population density in Assam, with 44 people per square kilometer.Dima Hasao district has the lowest population density in Assam, with 44 people per square kilometer.
Q6. Sudden burst into the open of hot water and vapour from deep underground is termed as Q6. Sudden burst into the open of hot water and vapour from deep underground is termed as
(A) geyser (A) geyser
(B) volcano (B) volcano
(C) tornado (C) tornado
(D) tsunami (D) tsunami
Answer: (B) volcano Answer: (B) volcano
A geyser is a hot spring that erupts periodically, shooting a column of hot water and steam into the air. This phenomenon occurs when underground water is heated by magma and builds up pressure until it forces its way to the surface.A geyser is a hot spring that erupts periodically, shooting a column of hot water and steam into the air. This phenomenon occurs when underground water is heated by magma and builds up pressure until it forces its way to the surface.
Q7. Which of the following is an example of a sentence with a relative clause? Q7. Which of the following is an example of a sentence with a relative clause?
(A) I went to the store. (A) I went to the store.
(B) The book is on the table. (B) The book is on the table.
(C) The dog, which is barking loudly, is my pet. (C) The dog, which is barking loudly, is my pet.
(D) She ate a sandwich and drank a glass of water. (D) She ate a sandwich and drank a glass of water.
Answer: (C) The dog, which is barking loudly, is my pet. Answer: (C) The dog, which is barking loudly, is my pet.
A relative clause is a dependent clause that begins with a relative pronoun (such as who, which, that, or whom) and provides additional information about a noun in the main clause.A relative clause is a dependent clause that begins with a relative pronoun (such as who, which, that, or whom) and provides additional information about a noun in the main clause.
As of 2021, Arunachal Pradesh has the lowest population density in India at 17 people per square kilometer. The national capital has the highest population density at 11,320 people per square kilometer.As of 2021, Arunachal Pradesh has the lowest population density in India at 17 people per square kilometer. The national capital has the highest population density at 11,320 people per square kilometer.
Q9. The speed of light is maximum in Q9. The speed of light is maximum in
(A) Glass (A) Glass
(B) Water (B) Water
(C) Air (C) Air
(D) Vaccum (D) Vaccum
Answer: (D) Vaccum Answer: (D) Vaccum
The speed of light is maximum in a vacuum. Vacuum is the least dense medium with no obstruction to the path of light. Its refractive index is equal to unity, hence, the speed of light is maximum in a vacuum.The speed of light is maximum in a vacuum. Vacuum is the least dense medium with no obstruction to the path of light. Its refractive index is equal to unity, hence, the speed of light is maximum in a vacuum.
