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Question 1532

What is commonly known as white plague?

ATyphoid

BMalaria

CTuberculosis

DPlague

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C. TuberculosisTuberculosis (TB) is commonly known as the "White Plague". It earned this name because it causes extreme paleness and weight loss in affected individuals. Tuberculosis is an infectious disease caused by the bacterium Mycobacterium tuberculosis, primarily affecting the lungs but can also spread to other parts of the body. It spreads through airborne droplets when an infected person coughs or sneezes. Other options (for context) Typhoid: Caused by Salmonella typhi, affects the intestine and causes high fever. Malaria: Caused by Plasmodium parasite transmitted through mosquito bites. Plague: Caused by Yersinia pestis, historically known as the “Black Death,” not the white plague.

Question 1530

Which of the following is NOT an allotrope of carbon?

ADiamond

BGraphite

CC-60

DMethane

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D. MethaneMethane (CH₄) is not an allotrope of carbon. It is a chemical compound made up of one carbon atom and four hydrogen atoms. In contrast, allotropes are different structural forms of the same element in the same physical state. Carbon has several allotropes, including diamond, graphite, and fullerene (C-60), which differ in atomic arrangement and physical properties. Other options (for context) Diamond: An allotrope of carbon where each carbon atom is tetrahedrally bonded to four others, making it extremely hard. Graphite: An allotrope of carbon with layers of hexagonally arranged atoms; good conductor of electricity. C-60 (Fullerene): A spherical allotrope of carbon consisting of 60 atoms arranged like a soccer ball.

Question 1520

Which of the following vitamins are water soluble?

AVitamin-A & Vitamin-B

BVitamin-B & Vitamin-C

CVitamin-C & Vitamin-D

DVitamin-A & Vitamin-K

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B. Vitamin-B & Vitamin-CVitamin-B complex and Vitamin-C are water-soluble vitamins. This means they dissolve easily in water and are not stored in the body; hence, they must be consumed regularly through diet. Excess amounts of these vitamins are excreted through urine. Vitamin-B complex includes B₁ (Thiamine), B₂ (Riboflavin), B₃ (Niacin), B₆, B₁₂, and others that play key roles in metabolism and energy production. Vitamin-C (Ascorbic acid) helps in collagen formation, boosts immunity, and acts as an antioxidant. Other options (for context) Vitamin-A & Vitamin-B: Vitamin-A is fat-soluble, while Vitamin-B is water-soluble. Vitamin-C & Vitamin-D: Vitamin-C is water-soluble, but Vitamin-D is fat-soluble. Vitamin-A & Vitamin-K: Both are fat-soluble vitamins.

Question 1515

Hepatitis affects which organ of the human body?

ALiver

BPancreas

CSpleen

DSmall intestine

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A. LiverHepatitis is a disease that primarily affects the liver. It is characterized by inflammation of the liver tissues and can be caused by viral infections (such as Hepatitis A, B, C, D, and E viruses), excessive alcohol consumption, toxins, or autoimmune conditions. Symptoms include jaundice (yellowing of the skin and eyes), fatigue, nausea, and abdominal pain. Severe or chronic hepatitis can lead to liver failure or cirrhosis if left untreated. Other options (for context) Pancreas: Affected by diseases like pancreatitis or diabetes, not hepatitis. Spleen: Involved in blood filtration and immunity, not affected by hepatitis. Small intestine: Responsible for digestion and absorption of food, not linked to hepatitis.

Question 1514

The most abundant metal in the Earth crust is:

Azinc

Bcopper

Caluminium

Diron

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C. aluminiumAluminium (Al) is the most abundant metal in the Earth's crust, making up about 8.2% by weight. It occurs mainly in the form of bauxite ore (Al₂O₃·2H₂O). Despite being highly abundant, aluminium is never found in its pure form naturally due to its strong reactivity with oxygen. It is widely used in industries for making utensils, aircraft parts, electrical wires, and packaging materials. Other options (for context) Zinc: Found in smaller quantities; used in galvanization and alloys. Copper: Less abundant; mainly used in electrical wiring. Iron: Very abundant but ranks below aluminium in crustal abundance.

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 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.

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Science

What is commonly known as white plague?

Which of the following is NOT an allotrope of carbon?

Which of the following vitamins are water soluble?

Hepatitis affects which organ of the human body?

The most abundant metal in the Earth crust is:

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

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?

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