Consider the following rivers of India: (a) Beas (b) Chenab (c) Ravi (d) Satluj.
Which of the following is the correct sequence of the above rivers from south to north?
(1) (a) (c) (b) (d)
(2) (d) (c) (b) (a)
(3) (a) (b) (c) (d)
(4) (d) (a) (c) (b)
Correct Answer: (4) (d) (a) (c) (b)
Explanation: From south to north, the sequence of these Indus tributaries is Satluj, Beas, Ravi, and Chenab.
Question 2
Which of the following rivers originates from the Amarkantak plateau?
(1) Narmada
(2) Son
(3) Johilla
(4) All of the above
Correct Answer: (4) All of the above
Explanation: Narmada, Son, and Johilla rivers all originate from the Amarkantak hill region.
Question 3
Through which of the following groups of Indian states does the Tropic of Cancer pass?
(1) Rajasthan, Jharkhand, West Bengal, Mizoram
(2) Gujarat, Uttar Pradesh, Bihar, Jharkhand
(3) Maharashtra, Chhattisgarh, Odisha, Mizoram
(4) Madhya Pradesh, Bihar, Tripura, West Bengal
Correct Answer: (1) Rajasthan, Jharkhand, West Bengal, Mizoram
Question 4
Which of the following is the highest peak of the Peninsular Plateau of India?
(1) Doda Betta
(2) Anamudi
(3) Mahendragiri
(4) Guru Shikhar
Correct Answer: (2) Anamudi
Explanation: Anamudi, located in the Western Ghats (Kerala), is the highest peak in Southern India and the peninsular plateau, with an elevation of 2,695 meters.
Question 5
Which soil type in India is also known as 'Regur Soil' and is highly suitable for cotton cultivation?
(1) Alluvial Soil
(2) Red Soil
(3) Black Soil
(4) Laterite Soil
Correct Answer: (3) Black Soil
Explanation: Black soil is rich in clay, retains moisture well, and is famously called Regur or Black Cotton Soil.
Question 6
The Standard Meridian of India (82°30' E) passes through which of the following states?
Which of the following passes connects Srinagar to Leh?
(1) Jelep La
(2) Nathu La
(3) Shipki La
(4) Zoji La
Correct Answer: (4) Zoji La
Explanation: Zoji La is a high mountain pass in the Himalayas, acting as an important link between Srinagar and Leh.
Question 8
Which of the following is the oldest mountain range in India?
(1) Himalayas
(2) Satpura Range
(3) Aravali Range
(4) Vindhya Range
Correct Answer: (3) Aravali Range
Explanation: The Aravali Range is one of the oldest fold mountain systems in the world, now highly eroded as residual hills.
Question 9
Arrange the following Himalayan ranges from North to South: (a) Ladakh Range (b) Karakoram Range (c) Zaskar Range (d) Pir Panjal Range
(1) (b) (a) (c) (d)
(2) (a) (b) (c) (d)
(3) (b) (c) (a) (d)
(4) (d) (c) (a) (b)
Correct Answer: (1) (b) (a) (c) (d)
Explanation: The correct sequence from north to south is: Karakoram, Ladakh, Zaskar, and Pir Panjal.
Question 10
Which of the following brings rainfall to Northwest India during the winter season?
(1) Southwest Monsoon
(2) Retreating Monsoon
(3) Western Disturbances
(4) Tropical Cyclones
Correct Answer: (3) Western Disturbances
Explanation: Western Disturbances originate over the Mediterranean Sea and bring crucial winter precipitation to northwest India, benefiting Rabi crops like wheat.
Question 11
Which of the following is the correct sequence of the tributaries of River Ganga from West to East?
Explanation: The 9 coastal states are Gujarat, Maharashtra, Goa, Karnataka, Kerala, Tamil Nadu, Andhra Pradesh, Odisha, and West Bengal.
Question 13
The boundary line between India and China is known as:
(1) Radcliffe Line
(2) Durand Line
(3) Mcmahon Line
(4) Sir Creek Line
Correct Answer: (3) Mcmahon Line
Question 14
On which of the following rivers is the Hirakud Dam, one of the longest dams in the world, built?
(1) Godavari
(2) Mahanadi
(3) Krishna
(4) Narmada
Correct Answer: (2) Mahanadi
Question 15
Which Indian state is the largest producer of bauxite?
(1) Odisha
(2) Jharkhand
(3) Gujarat
(4) Chhattisgarh
Correct Answer: (1) Odisha
Explanation: Odisha is India's leading producer of bauxite, accounting for more than half of the country's total production.
Question 16
In which Indian state is the famous Loktak Lake (known for its floating 'phumdis') located?
(1) Assam
(2) Manipur
(3) Mizoram
(4) Meghalaya
Correct Answer: (2) Manipur
Explanation: Loktak Lake is the largest freshwater lake in Northeast India and is famous for the Keibul Lamjao National Park, the world's only floating national park, which floats over it.
Question 17
Which of the following ports in India is a major tidal port?
(1) Jawaharlal Nehru Port (JNPT)
(2) Kandla Port (Deendayal Port)
(3) Paradip Port
(4) Mormugao Port
Correct Answer: (2) Kandla Port (Deendayal Port)
Explanation: Kandla Port, located in the Gulf of Kutch in Gujarat, is a natural deep-water and tidal port.
Question 18
Which of the following was the first Biosphere Reserve established in India?
(1) Nanda Devi Biosphere Reserve
(2) Gulf of Mannar Biosphere Reserve
(3) Nilgiri Biosphere Reserve
(4) Sundarbans Biosphere Reserve
Correct Answer: (3) Nilgiri Biosphere Reserve
Explanation: The Nilgiri Biosphere Reserve was established in 1986 and spans across Tamil Nadu, Kerala, and Karnataka.
Question 19
Which river is famously referred to as 'Dakshin Ganga' (Ganges of the South)?
(1) Krishna
(2) Cauvery
(3) Godavari
(4) Mahanadi
Correct Answer: (3) Godavari
Explanation: Godavari is the second-longest river in India after the Ganga and is called Dakshin Ganga due to its large size and expanse.
Question 20
Which of the following types of forests covers the maximum geographical area of India?
Explanation: Deciduous forests (both moist and dry variants) constitute the largest share of forest cover in India, with moist deciduous being dominant.
Question 21
Which Indian state is the first to receive rainfall from the Southwest Monsoon?
(1) Goa
(2) Maharashtra
(3) Kerala
(4) Tamil Nadu
Correct Answer: (3) Kerala
Explanation: The Southwest Monsoon typically hits the Malabar Coast of Kerala around June 1st, marking the official onset of the rainy season in India.
Question 22
The "Yellow Revolution" in India is associated with the increased production of:
(1) Poultry
(2) Gold
(3) Oilseeds
(4) Milk
Correct Answer: (3) Oilseeds
Explanation: Launched in 1986-1987, the Yellow Revolution targeted self-reliance in oilseed production (particularly mustard and sesame).
Question 23
Which of the following Indian states shares the longest international land border with Bangladesh?
(1) Assam
(2) Tripura
(3) West Bengal
(4) Meghalaya
Correct Answer: (3) West Bengal
Explanation: India shares its longest international land boundary with Bangladesh, and West Bengal alone accounts for over 2,216 km of this border.
Question 24
Kaziranga National Park, located in Assam, is world-famous for protecting which of the following animals?
(1) Asiatic Lion
(2) Bengal Tiger
(3) One-horned Rhinoceros
(4) Snow Leopard
Correct Answer: (3) One-horned Rhinoceros
Question 25
On which river is the Sardar Sarovar Dam constructed?
(1) Tapti
(2) Sabarmati
(3) Narmada
(4) Mahi
Correct Answer: (3) Narmada
Question 26
Who was the founder of the Maurya Empire in ancient India?
(1) Chandragupta Maurya
(2) Ashoka
(3) Bindusara
(4) Chandragupta I
Correct Answer: (1) Chandragupta Maurya
Explanation: Chandragupta Maurya founded the empire in 322 BCE after overthrowing the Nanda dynasty with the help of Chanakya.
Question 27
The historic First Battle of Panipat (1526) was fought between Babur and whom?
(1) Hemu
(2) Ibrahim Lodi
(3) Rana Sanga
(4) Sher Shah Suri
Correct Answer: (2) Ibrahim Lodi
Explanation: This battle marked the beginning of the Mughal Empire in India and the end of the Delhi Sultanate.
Question 28
Who is widely regarded as the chief architect and "Father of the Indian Constitution"?
(1) Mahatma Gandhi
(2) Dr. B.R. Ambedkar
(3) Jawaharlal Nehru
(4) Dr. Rajendra Prasad
Correct Answer: (2) Dr. B.R. Ambedkar
Question 29
Which of the following gases is most abundant in the Earth's atmosphere?
(1) Oxygen
(2) Carbon Dioxide
(3) Nitrogen
(4) Argon
Correct Answer: (3) Nitrogen
Explanation: Nitrogen makes up roughly 78% of the Earth's atmosphere, followed by Oxygen at approximately 21%.
Question 30
Which of the following cells in the human body are responsible for carrying oxygen to various tissues?
(1) Red Blood Cells (RBCs)
(2) White Blood Cells (WBCs)
(3) Platelets
(4) Plasma
Correct Answer: (1) Red Blood Cells (RBCs)
Explanation: Red blood cells contain hemoglobin, a protein that binds to oxygen and distributes it throughout the body.
Question 31
Which Part of the Constitution of India deals with the Fundamental Rights of its citizens?
(1) Part II
(2) Part III
(3) Part IV
(4) Part IV-A
Correct Answer: (2) Part III
Explanation: Part III (Articles 12 to 35) of the Constitution of India contains the Fundamental Rights, often referred to as the Magna Carta of India.
Question 32
At which of the following Indus Valley Civilization sites was the famous "Great Bath" discovered?
(1) Harappa
(2) Lothal
(3) Mohenjo-daro
(4) Kalibangan
Correct Answer: (3) Mohenjo-daro
Explanation: The Great Bath is one of the most famous public structures of the ancient Indus Valley Civilization, uncovered at Mohenjo-daro in modern-day Pakistan.
Question 33
A doctor prescribes a corrective lens of power +1.5 D. What is the focal length of this lens and its nature?
(1) +0.67 m, Converging (Convex)
(2) -0.67 m, Diverging (Concave)
(3) +1.5 m, Converging (Convex)
(4) -1.5 m, Diverging (Concave)
Correct Answer: (1) +0.67 m, Converging (Convex)
Explanation: Power (P) is the reciprocal of focal length in meters (f = 1/P). Here, f = 1 / (+1.5) = +0.67 meters. A positive focal length indicates a convex (converging) lens.
Question 34
Which of the following chemical compounds is commonly known as "Plaster of Paris"?
(1) Calcium Sulphate Dihydrate
(2) Calcium Sulphate Hemihydrate
(3) Calcium Carbonate
(4) Sodium Hydrogen Carbonate
Correct Answer: (2) Calcium Sulphate Hemihydrate
Explanation: Plaster of Paris is represented by the formula CaSO4 · 1/2 H2O. It is obtained by heating gypsum (CaSO4 · 2H2O) to 373 K.
Question 35
Which of the following processes in plants is responsible for the upward movement of water and dissolved minerals from roots to leaves?
(1) Photosynthesis
(2) Respiration
(3) Transpiration
(4) Translocation
Correct Answer: (3) Transpiration
Explanation: Transpiration creates a suction pull (transpiration pull) which actively draws water and minerals up through the xylem vessels.
Question 36
The "Western Ghats" and "Eastern Ghats" of India meet at which of the following hill ranges?
(1) Cardamom Hills
(2) Anaimalai Hills
(3) Nilgiri Hills
(4) Palani Hills
Correct Answer: (3) Nilgiri Hills
Question 37
How many members can the President of India nominate to the Rajya Sabha (Upper House of Parliament)?
(1) 2
(2) 10
(3) 12
(4) 15
Correct Answer: (3) 12
Explanation: Under Article 80 of the Constitution, the President can nominate 12 members to Rajya Sabha who have special knowledge or practical experience in fields like Art, Literature, Science, and Social Service.
Question 38
During which national movement did Mahatma Gandhi give the famous slogan "Do or Die" (Karo ya Maro)?
(1) Non-Cooperation Movement
(2) Civil Disobedience Movement
(3) Quit India Movement
(4) Khilafat Movement
Correct Answer: (3) Quit India Movement
Explanation: Gandhi issued this call during his speech in Bombay at the launch of the Quit India Movement on August 8, 1942.
Question 39
According to Ohm's Law, if the resistance of a circuit is doubled while keeping the potential difference constant, the current flowing through it will:
(1) Double
(2) Become half
(3) Remain the same
(4) Become four times
Correct Answer: (2) Become half
Explanation: Ohm's Law states V = I * R. Therefore, current I = V / R. Since current is inversely proportional to resistance, doubling the resistance halves the current.
Question 40
The process of applying a protective zinc coating to steel or iron to prevent rusting is called:
(1) Galvanisation
(2) Anodising
(3) Alloy formation
(4) Electroplating
Correct Answer: (1) Galvanisation
Question 41
Which of the following is India's first National Park, established in 1936?
(1) Jim Corbett National Park
(2) Gir National Park
(3) Kanha National Park
(4) Ranthambore National Park
Correct Answer: (1) Jim Corbett National Park
Explanation: Located in Uttarakhand, it was originally named Hailey National Park before being renamed Jim Corbett National Park.
Question 42
Which Constitutional Amendment Act accorded constitutional status to the Panchayati Raj institutions in India?
(1) 42nd Amendment Act
(2) 44th Amendment Act
(3) 73rd Amendment Act
(4) 74th Amendment Act
Correct Answer: (3) 73rd Amendment Act
Explanation: Passed in 1992, the 73rd Amendment added Part IX to the Constitution, formalizing the three-tier Panchayati Raj system.
Question 43
The Battle of Plassey (1757) was fought between the British East India Company and which Nawab of Bengal?
(1) Mir Jafar
(2) Mir Qasim
(3) Siraj-ud-Daulah
(4) Alivardi Khan
Correct Answer: (3) Siraj-ud-Daulah
Question 44
Which chamber of the human heart receives oxygen-rich blood directly from the lungs?
(1) Right Atrium
(2) Left Atrium
(3) Right Ventricle
(4) Left Ventricle
Correct Answer: (2) Left Atrium
Explanation: Oxygenated blood from the lungs travels through the pulmonary veins and enters the left atrium first, which then pumps it into the left ventricle.
Question 45
Which of the following is a non-metal but is a good conductor of electricity?
(1) Coal
(2) Sulfur
(3) Phosphorus
(4) Graphite
Correct Answer: (4) Graphite
Explanation: Graphite is an allotrope of carbon. Its structure contains free electrons that are able to move, making it an excellent conductor of electricity despite being a non-metal.
Question 46
Which of the following elements has the highest electrical conductivity?
(1) Copper
(2) Gold
(3) Silver
(4) Aluminum
Correct Answer: (3) Silver
Explanation: Silver has the highest electrical conductivity of all metals, followed closely by copper and gold.
Question 47
Who presided over the historic 1929 Lahore Session of the Indian National Congress where the resolution for 'Purna Swaraj' (Complete Independence) was passed?
(1) Mahatma Gandhi
(2) Subhash Chandra Bose
(3) Jawaharlal Nehru
(4) Motilal Nehru
Correct Answer: (3) Jawaharlal Nehru
Explanation: The Lahore Session of December 1929 was presided over by Jawaharlal Nehru, where the Congress declared 'Purna Swaraj' as its ultimate goal and hoisted the tricolor flag on the banks of the Ravi River.
Question 48
Which of the following is the ultimate source of energy for almost all living organisms on Earth?
(1) Geothermal Energy
(2) Solar Energy
(3) Wind Energy
(4) Nuclear Energy
Correct Answer: (2) Solar Energy
Explanation: Solar energy is captured by green plants during photosynthesis to produce food, which forms the foundation of all food chains on Earth.
Question 49
The concept of "Directive Principles of State Policy" (DPSP) in the Indian Constitution was borrowed from the constitution of which country?
(1) USA
(2) Ireland
(3) UK
(4) Australia
Correct Answer: (2) Ireland
Explanation: The DPSP, detailed in Part IV of the Indian Constitution, was adopted from the Constitution of Ireland (which had copied it from the Spanish Constitution).
Question 50
Which of the following hormones regulates blood sugar levels in the human body?
(1) Adrenaline
(2) Thyroxine
(3) Insulin
(4) Estrogen
Correct Answer: (3) Insulin
Explanation: Insulin, secreted by the beta cells of the pancreas, helps cells absorb glucose from the blood, thereby lowering blood sugar levels.
Question 51
Which of the following is the most active metal among those given below?
(1) Iron
(2) Zinc
(3) Sodium
(4) Gold
Correct Answer: (3) Sodium
Explanation: Sodium (Na) is highly reactive and sits near the top of the metal reactivity series, reacting vigorously with water and oxygen.
Question 52
At which point on the principal axis of a concave mirror should an object be placed to obtain a real, inverted, and same-sized image?
(1) At Focus (F)
(2) At Center of Curvature (C)
(3) Between Focus (F) and Pole (P)
(4) Beyond Center of Curvature (C)
Correct Answer: (2) At Center of Curvature (C)
Question 53
What is the pH value of a neutral solution?
(1) 0
(2) 1
(3) 7
(4) 14
Correct Answer: (3) 7
Explanation: A pH of 7 is neutral (e.g., pure water). Values below 7 are acidic, while values above 7 are basic or alkaline.
Question 54
Which of the following instruments is used to measure electric current in a circuit?
(1) Voltmeter
(2) Galvanometer
(3) Ammeter
(4) Ohmmeter
Correct Answer: (3) Ammeter
Explanation: An ammeter is connected in series in a circuit to measure the rate of flow of electric charge (current).
Question 55
Which layer of the atmosphere contains the Ozone Layer, which protects us from harmful ultraviolet (UV) radiation?
(1) Troposphere
(2) Stratosphere
(3) Mesosphere
(4) Thermosphere
Correct Answer: (2) Stratosphere
Question 56
The "Sunderbans" in India are famous for which type of vegetation?
(1) Evergreen Forest
(2) Deciduous Forest
(3) Mangrove Forest
(4) Coniferous Forest
Correct Answer: (3) Mangrove Forest
Explanation: The Sunderbans region is the largest deltaic mangrove forest in the world, dominated by Sundari trees.
Question 57
Who was the first female Prime Minister of India?
(1) Pratibha Patil
(2) Sarojini Naidu
(3) Indira Gandhi
(4) Sucheta Kripalani
Correct Answer: (3) Indira Gandhi
Question 58
Which gas is released during the process of photosynthesis?
(1) Carbon Dioxide
(2) Nitrogen
(3) Oxygen
(4) Hydrogen
Correct Answer: (3) Oxygen
Explanation: During photosynthesis, plants take in carbon dioxide and water, converting them into glucose and releasing oxygen gas as a byproduct.
Question 59
What is the minimum age required to contest elections for the Lok Sabha in India?
(1) 18 years
(2) 21 years
(3) 25 years
(4) 30 years
Correct Answer: (3) 25 years
Question 60
Which Acid is present in vinegar?
(1) Citric Acid
(2) Tartaric Acid
(3) Acetic Acid
(4) Lactic Acid
Correct Answer: (3) Acetic Acid
Explanation: Vinegar is typically a 5-8% solution of acetic acid (ethanoic acid) in water.
Question 61
Which device is used to convert mechanical energy into electrical energy?
(1) Electric Motor
(2) Generator (Dynamo)
(3) Transformer
(4) Battery
Correct Answer: (2) Generator (Dynamo)
Explanation: A generator works on the principle of electromagnetic induction to convert mechanical motion into electrical current.
Question 62
The "Chipko Movement," led by Sunderlal Bahuguna, was primarily focused on what?
(1) Women's Rights
(2) Forest Conservation
(3) Anti-Corruption
(4) Education for All
Correct Answer: (2) Forest Conservation
Explanation: Started in the 1970s, the Chipko movement involved people hugging trees to prevent them from being cut down.
Question 63
Which element is essential for the formation of hemoglobin in human blood?
(1) Calcium
(2) Iron
(3) Magnesium
(4) Potassium
Correct Answer: (2) Iron
Question 64
Who is known as the "Iron Man of India"?
(1) Bhagat Singh
(2) Subhash Chandra Bose
(3) Sardar Vallabhbhai Patel
(4) Bal Gangadhar Tilak
Correct Answer: (3) Sardar Vallabhbhai Patel
Question 65
Which of the following mirrors is used by dentists to see enlarged images of teeth?
(1) Plane Mirror
(2) Convex Mirror
(3) Concave Mirror
(4) Parabolic Mirror
Correct Answer: (3) Concave Mirror
Explanation: When an object is placed between the pole and focus of a concave mirror, it forms an enlarged, virtual, and erect image.
Question 66
Which of the following is the most abundant metal in the Earth's crust?
(1) Iron
(2) Aluminum
(3) Calcium
(4) Sodium
Correct Answer: (2) Aluminum
Explanation: Aluminum is the third most abundant element overall, but the most abundant metal in the crust.
Question 67
The "Satyagraha" movement was first started by Mahatma Gandhi in India at:
(1) Bardoli
(2) Champaran
(3) Dandi
(4) Sabarmati
Correct Answer: (2) Champaran
Explanation: Champaran Satyagraha (1917) was Gandhi's first non-violent struggle in India, organized to support farmers against forced indigo cultivation.
Question 68
Which of the following is a byproduct of the anaerobic respiration in muscles?
(1) Ethanol
(2) Lactic Acid
(3) Acetic Acid
(4) Citric Acid
Correct Answer: (2) Lactic Acid
Explanation: During vigorous exercise, muscle cells may run out of oxygen and switch to anaerobic respiration, producing lactic acid which causes muscle cramps.
Question 69
Which of the following is the largest ocean in the world?
(1) Atlantic Ocean
(2) Indian Ocean
(3) Arctic Ocean
(4) Pacific Ocean
Correct Answer: (4) Pacific Ocean
Question 70
Which part of the brain controls balance, posture, and coordination?
(1) Cerebrum
(2) Cerebellum
(3) Medulla
(4) Hypothalamus
Correct Answer: (2) Cerebellum
Question 71
Which of the following is known as the "Powerhouse of the cell"?
(1) Nucleus
(2) Ribosome
(3) Mitochondria
(4) Lysosome
Correct Answer: (3) Mitochondria
Question 72
What is the chemical formula of common salt?
(1) NaOH
(2) NaCl
(3) Na2CO3
(4) NaHCO3
Correct Answer: (2) NaCl
Explanation: Common salt is Sodium Chloride (NaCl).
Question 73
Which Indian state has the highest population?
(1) Maharashtra
(2) Bihar
(3) Uttar Pradesh
(4) West Bengal
Correct Answer: (3) Uttar Pradesh
Question 74
Which of the following reflects the most amount of light?
(1) A piece of paper
(2) A plane mirror
(3) A black cloth
(4) A rough wooden board
Correct Answer: (2) A plane mirror
Question 75
Who wrote the famous book "Discovery of India"?
(1) Mahatma Gandhi
(2) Rabindranath Tagore
(3) Jawaharlal Nehru
(4) B.R. Ambedkar
Correct Answer: (3) Jawaharlal Nehru
Question 76
Which of the following elements has the electronic configuration 2, 8, 2?
(1) Sodium
(2) Magnesium
(3) Aluminum
(4) Silicon
Correct Answer: (2) Magnesium
Explanation: Magnesium has an atomic number of 12, giving it an electronic configuration of 2, 8, 2.
Question 77
Who was the first Indian to win a Nobel Prize?
(1) C.V. Raman
(2) Rabindranath Tagore
(3) Mother Teresa
(4) Har Gobind Khorana
Correct Answer: (2) Rabindranath Tagore
Explanation: Rabindranath Tagore won the Nobel Prize in Literature in 1913 for his collection of poems, Gitanjali.
Question 78
Which of the following components of food is primarily digested in the stomach?
(1) Carbohydrates
(2) Proteins
(3) Fats
(4) Vitamins
Correct Answer: (2) Proteins
Explanation: The stomach secretes pepsin, an enzyme that starts the chemical breakdown of proteins into smaller peptides.
Question 79
The "Dandi March" led by Mahatma Gandhi was a protest against which of the following?
(1) Indigo Farming
(2) Salt Tax
(3) Simon Commission
(4) Partition of Bengal
Correct Answer: (2) Salt Tax
Question 80
Which plant hormone is responsible for the ripening of fruits?
(1) Auxin
(2) Gibberellin
(3) Cytokinin
(4) Ethylene
Correct Answer: (4) Ethylene
Explanation: Ethylene is a gaseous plant hormone that coordinates and stimulates fruit ripening.
Question 81
Which of the following is the SI unit of electric potential difference?
(1) Ampere
(2) Ohm
(3) Volt
(4) Watt
Correct Answer: (3) Volt
Question 82
Which of the following structures in plant cells provides mechanical strength and rigidity?
(1) Cell Membrane
(2) Cytoplasm
(3) Cell Wall
(4) Chloroplast
Correct Answer: (3) Cell Wall
Question 83
The "Red Data Book" is published by which of the following organizations to keep a record of endangered species?
(1) UNESCO
(2) WWF
(3) IUCN
(4) UNEP
Correct Answer: (3) IUCN
Explanation: The International Union for Conservation of Nature (IUCN) maintains and publishes the Red List of Threatened Species.
Question 84
Which metal is found in a liquid state at room temperature?
(1) Sodium
(2) Mercury
(3) Gallium
(4) Bromine
Correct Answer: (2) Mercury
Explanation: Mercury (Hg) is the only metal that remains liquid under standard room temperature and pressure.
Question 85
Who was the first President of Independent India?
(1) Dr. S. Radhakrishnan
(2) Dr. Rajendra Prasad
(3) Jawaharlal Nehru
(4) Lal Bahadur Shastri
Correct Answer: (2) Dr. Rajendra Prasad
Question 86
What is the focus of a convex lens called where parallel rays of light meet after refraction?
(1) Center of Curvature
(2) Principal Focus
(3) Optical Center
(4) Aperture
Correct Answer: (2) Principal Focus
Question 87
Which of the following is a balanced chemical equation for the respiration process?
