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Question 1510

Which of the following is the uppermost layer of the atmosphere?

AStratosphere

BMesosphere

CIonosphere

DExosphere

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D. ExosphereThe Exosphere is the uppermost layer of the Earth's atmosphere. It lies above the thermosphere and gradually merges into outer space. The exosphere extends roughly from 700 km to 10,000 km above the Earth's surface. In this layer, air is extremely thin, and gas molecules such as hydrogen and helium are sparse and can even escape into space. Other options (for context) Stratosphere: Second layer from the Earth’s surface; contains the ozone layer. Mesosphere: Lies above the stratosphere; meteors burn up here. Ionosphere: A region within the thermosphere important for radio communication, not the outermost layer.

Question 1509

The founder of Bachpan Bachao Andolan (Save Child Movement ) is:

AMalala Yousafzai

BSane Guruji

CSalman Khan

DKailash Satyarthi

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D. Kailash SatyarthiExplanation not yet available.

Question 1508

Who is the author of the book titled Citizen and Society?

APranab Mukherjee

BHamid Ansari

CNandan Nilekani

DSatyajit Ray

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B. Hamid AnsariExplanation not yet available.

Question 1507

Which metal is responsible for Itai-Itai disease?

ACadmium

BNickel

CChromium

DMercury

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A. CadmiumThe Itai-Itai disease is caused by Cadmium (Cd) poisoning. The disease was first identified in Japan, where industrial discharge of cadmium-contaminated water led to severe pollution. People consuming rice grown in this contaminated water suffered from extreme pain in bones and joints, along with kidney damage. The name "Itai-Itai" literally means "ouch-ouch" in Japanese, reflecting the severe pain experienced by victims. Other options (for context) Nickel: Causes dermatitis and allergic reactions but not Itai-Itai disease. Chromium: Can cause skin and respiratory problems, not bone-related disorders. Mercury: Leads to Minamata disease, not Itai-Itai disease.

Question 1506

Which acid is released when an Ant bites?

AHydrochloric Acid

BFormic Acid

CAcetic Acid

DPhosphoric Acid

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B. Formic AcidWhen an ant bites, it releases formic acid (HCOOH) into the skin. This acid causes a sharp burning sensation, redness, and irritation at the site of the bite. The name “formic” comes from the Latin word “formica”, meaning ant, as the acid was first extracted from ants. The pain can be neutralized by applying a mild base like baking soda (sodium bicarbonate). Other options (for context) Hydrochloric Acid: Found in the human stomach, aids digestion. Acetic Acid: Main component of vinegar, not involved in ant bites. Phosphoric Acid: Used in fertilizers and soft drinks, not produced by ants.

Question 1505

What is the full form of LAN?

ALine Area Network

BLinear Area Network

CLocal Area Network

DLand Area Network

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C. Local Area NetworkThe full form of LAN is Local Area Network. It is a network that connects computers and devices within a limited geographical area such as a home, office, school, or building. LANs enable data sharing, resource sharing (like printers or internet connections), and communication between connected devices. Common technologies used in LANs include Ethernet and Wi-Fi. Other options (for context) Line Area Network: Incorrect — not a recognized networking term. Linear Area Network: Incorrect — there is no such standard network type. Land Area Network: Incorrect — misinterpretation of LAN abbreviation.

Question 1504

Xylem helps in transportation of which of the following?

Afood

Bwater

Cnutrient

Dboth food and water

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B. waterXylem is a type of vascular tissue in plants responsible for the transportation of water and dissolved minerals from the roots to the stems and leaves. The upward movement of water through xylem vessels occurs due to processes like transpiration pull, root pressure, and capillary action. Xylem also provides mechanical support to the plant. Other options (for context) Food: Transported by phloem, not xylem. Nutrient: Minerals are carried along with water but the primary function of xylem is water transport. Both food and water: Incorrect — only phloem transports food; xylem transports water.

Question 1503

Which Indian state has the longest Coastline?

AKerala

BGujarat

CAndhra Pradesh

DTamil Nadu

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B. GujaratExplanation not yet available.

Question 1502

The Brahmaputra has its source __________ the Himalayas.

Ainto

Bin

Cunder

Dat

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B. inExplanation not yet available.

Question 1501

He is separated __________ his family.

Awith

Bto

Cof

Dfrom

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D. fromExplanation not yet available.

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Explore the question bank

Which of the following is the uppermost layer of the atmosphere?

The founder of Bachpan Bachao Andolan (Save Child Movement ) is:

Who is the author of the book titled Citizen and Society?

Which metal is responsible for Itai-Itai disease?

Which acid is released when an Ant bites?

What is the full form of LAN?

Xylem helps in transportation of which of the following?

Which Indian state has the longest Coastline?

The Brahmaputra has its source __________ the Himalayas.

He is separated __________ his family.

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