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The number of protons in an atom determines its ________ number.
- Mass
- Atomic
- Neutron
- Electron
Answer: Atomic
Atomic number (Z) = proton count, defining an element's identity and position in periodic table. Mass number = protons + neutrons. Foundational concept in chemistry. [[NCERT Chemistry Class 11]]
The tiny air sacs in lungs where gas exchange occurs are called ________.
- Bronchi
- Bronchioles
- Alveoli
- Trachea
Answer: Alveoli
Alveoli are microscopic sacs surrounded by capillaries. Oxygen diffuses into blood, CO₂ diffuses out. Their large surface area (~70 m²) enables efficient respiration. Key anatomy concept. [[NCERT Biology Class 11]]
The value of acceleration due to gravity (g) on Earth's surface is approximately ________ m/s².
- 8.9
- 9.8
- 10.2
- 11.0
Answer: 9.8
Standard gravity (g) is 9.8 m/s², varying slightly with altitude and latitude. It's derived from Newton's law of gravitation (g = GM/R²). Essential for mechanics problems in physics. [[NCERT Physics Class 11]]
The Paris Agreement aims to limit global warming to well below ________°C above pre-industrial levels.
- 1.5
- 2.0
- 2.5
- 3.0
Answer: 2.0
The 2015 Paris Agreement targets limiting global temperature rise to well below 2°C, preferably 1.5°C, to mitigate climate change impacts. India is a signatory committed to Nationally Determined Contributions (NDCs). [[UNFCCC, NCERT Geography Class 11]]
The functional group -COOH is characteristic of ________ acids.
- Amino
- Carboxylic
- Fatty
- Mineral
Answer: Carboxylic
Carboxylic acids contain the carboxyl group (-COOH), which imparts acidic properties. Examples include acetic acid (vinegar) and citric acid. This group is central to organic chemistry reactions and biochemistry. [[NCERT Chemistry Class 12]]
The process by which plants lose water vapor through stomata is called ________.
- Photosynthesis
- Respiration
- Transpiration
- Guttation
Answer: Transpiration
Transpiration is the evaporation of water from plant leaves via stomata. It aids in water uptake, nutrient transport, and cooling. Excessive transpiration can cause wilting. Key concept in botany. [[NCERT Biology Class 11]]
One light year is a unit of ________.
- Time
- Distance
- Speed
- Intensity
Answer: Distance
A light year is the distance light travels in one year in vacuum (~9.46 trillion km). It's used in astronomy to measure vast interstellar distances, not time. Common trick question in exams. [[NCERT Physics Class 11]]
HTTP stands for ________ Transfer Protocol.
- Hyper Text
- High Text
- Hyper Transfer
- High Transfer
Answer: Hyper Text
HTTP (HyperText Transfer Protocol) is the foundation of data communication on the World Wide Web. It enables loading of web pages using hypertext links. HTTPS adds encryption for security. Crucial for computer awareness sections. [[NCERT Computer Science]]
The chemical formula of common salt is ________.
- KCl
- NaCl
- CaCl₂
- MgCl₂
Answer: NaCl
Sodium chloride (NaCl) is common table salt, formed by ionic bonding between sodium (Na⁺) and chloride (Cl⁻) ions. It's essential for nerve function and fluid balance in humans. [[NCERT Chemistry Class 10]]
The enzyme pepsin is secreted by the ________ in the stomach.
- Liver
- Pancreas
- Gastric glands
- Salivary glands
Answer: Gastric glands
Gastric glands in the stomach lining secrete pepsinogen, which converts to active pepsin in acidic environment. Pepsin breaks down proteins into peptides, initiating protein digestion. This is a key concept in human physiology. [[NCERT Biology Class 11]]
The SI unit of electric current is ________.
- Volt
- Ohm
- Ampere
- Watt
Answer: Ampere
Ampere (A) is the SI base unit for electric current, defined as one coulomb of charge passing a point per second. Named after physicist André-Marie Ampère, it's fundamental in electrical engineering and daily applications. [[NCERT Physics Class 10]]
The element with atomic number 1 is ________.
- Helium
- Hydrogen
- Lithium
- Oxygen
Answer: Hydrogen
Hydrogen (H) has atomic number 1, meaning it has one proton in its nucleus. It is the lightest and most abundant element in the universe, forming the basis of organic chemistry. [[NCERT Chemistry Class 11]]
The 'Quit India Movement' slogan was '______'.
Answer: Do or Die
Gandhi gave the 'Do or Die' slogan at the Bombay session of AICC on August 8, 1942, launching the Quit India Movement. It inspired mass participation despite immediate arrests of Congress leaders. [[30]]
The 'Ayushman Bharat' health scheme was launched in the year ______.
Answer: 2018
Ayushman Bharat - Pradhan Mantri Jan Arogya Yojana was launched in September 2018. It aims to provide health insurance coverage of ₹5 lakh per family per year for secondary and tertiary care hospitalization. [[1]]
The 'Union Public Service Commission' (UPSC) was established under Article ______ of the Constitution.
Answer: 315
The Union Public Service Commission (UPSC) is established under Article 315 of the Constitution. It conducts examinations for recruitment to All India Services and Central Services, ensuring merit-based selection. [[30]]
The 'Khajuraho Group of Monuments' is famous for its ______ temples.
Answer: erotic sculpture
The Khajuraho temples (950-1050 CE), built by the Chandela dynasty, are renowned for intricate erotic sculptures symbolizing the celebration of life and spiritual union. They are a UNESCO World Heritage Site. [[1]]
India's first successful missile test 'Prithvi' was conducted in the year ______.
Answer: 1988
India's first successful test of the Prithvi short-range ballistic missile was conducted on February 25, 1988. It marked a milestone in India's Integrated Guided Missile Development Programme under Dr. A.P.J. Abdul Kalam. [[30]]
India's first individual Olympic gold medal was won by ______ in shooting (2008).
Answer: Abhinav Bindra
Abhinav Bindra won India's first individual Olympic gold medal in the 10m air rifle event at the 2008 Beijing Olympics. His achievement inspired a new generation of Indian athletes. [[1]]
The 'Bharat Ratna', India's highest civilian award, was instituted in the year ______.
Answer: 1954
The Bharat Ratna was instituted on January 2, 1954, to recognize exceptional service in any field. The first recipients were C. Rajagopalachari, S. Radhakrishnan, and C.V. Raman. [[30]]
The 'Constitution of India' was adopted on ______.
Answer: November 26, 1949
The Constitution of India was adopted by the Constituent Assembly on November 26, 1949, and came into force on January 26, 1950. November 26 is celebrated as Constitution Day (Samvidhan Divas). [[1]]