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Rainwater harvesting helps in recharging ________ water.
- Surface
- Ground
- Distilled
- Saline
Answer: Ground
Harvested rainwater percolates into aquifers, replenishing groundwater tables. Critical for sustainable water management in water-stressed regions like India. [[CGWB Reports, NCERT Geography Class 11]]
Which color bin is used for biodegradable waste in India's segregation system?
- Green
- Blue
- Red
- Yellow
Answer: Green
As per Solid Waste Management Rules 2016: Green bin = wet/biodegradable waste (food scraps); Blue = dry/recyclable; Red = domestic hazardous. Important for civic awareness questions. [[MoHUA Guidelines, NCERT Geography Class 11]]
1 Byte equals ________ bits.
- 4
- 8
- 16
- 32
Answer: 8
1 Byte = 8 bits (binary digits). This standard unit conversion is essential for understanding computer memory, data transfer rates, and digital storage concepts. [[NCERT Computer Science]]
In humans, fertilization typically occurs in the:
- Ovary
- Uterus
- Fallopian tube
- Cervix
Answer: Fallopian tube
Fertilization (sperm-egg fusion) happens in the ampulla region of fallopian tube. The zygote then implants in uterus. Critical for human reproduction topics. [[NCERT Biology Class 12]]
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]]
True or False: A solution with pH less than 7 is basic.
- True
- False
Answer: False
pH < 7 indicates acidic solution; pH > 7 is basic; pH = 7 is neutral. pH scale measures hydrogen ion concentration. Fundamental for acid-base chemistry in exams. [[NCERT Chemistry Class 10]]
Which state of matter has definite shape and volume?
- Solid
- Liquid
- Gas
- Plasma
Answer: Solid
Solids have fixed shape and volume due to strong intermolecular forces holding particles in fixed positions. Liquids have fixed volume but variable shape; gases have neither. Basic concept in matter classification. [[NCERT Chemistry Class 9]]
True or False: Convex lenses are used to correct myopia (nearsightedness).
- True
- False
Answer: False
Myopia is corrected using concave (diverging) lenses. Convex (converging) lenses correct hypermetropia (farsightedness). Understanding lens applications is essential for optics questions in exams. [[NCERT Physics Class 10]]
The rate of change of velocity is called:
- Speed
- Acceleration
- Momentum
- Force
Answer: Acceleration
Acceleration (a = Δv/Δt) measures how quickly velocity changes. It's a vector quantity with SI unit m/s². Negative acceleration is deceleration. Fundamental in kinematics for physics exams. [[NCERT Physics Class 9]]
Solar energy is converted into electrical energy using:
- Wind turbines
- Photovoltaic cells
- Hydroelectric dams
- Biogas plants
Answer: Photovoltaic cells
Photovoltaic (PV) cells in solar panels convert sunlight directly into electricity via the photovoltaic effect. This clean energy technology is promoted under India's National Solar Mission. [[MNRE Reports, NCERT Geography Class 11]]
True or False: Prokaryotic cells have a well-defined nucleus.
- True
- False
Answer: False
Prokaryotes (e.g., bacteria) lack a membrane-bound nucleus; their DNA floats in the nucleoid region. Eukaryotes (plants, animals) have a true nucleus. This distinction is fundamental in biology classification. [[NCERT Biology 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]]
Sound waves cannot travel through:
- Solid
- Liquid
- Gas
- Vacuum
Answer: Vacuum
Sound requires a medium (solid, liquid, or gas) to propagate as mechanical waves. In vacuum, there are no particles to vibrate, so sound cannot travel. This explains why space is silent. [[NCERT Physics Class 9]]
True or False: RAM is a type of non-volatile memory.
- True
- False
Answer: False
RAM (Random Access Memory) is volatile memory, meaning it loses stored data when power is turned off. Non-volatile memories like ROM, SSDs, or hard drives retain data without power. This distinction is critical in computer architecture. [[NCERT Computer Science]]
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]]
Which part of the human brain is responsible for maintaining balance and posture?
- Cerebrum
- Cerebellum
- Medulla Oblongata
- Hypothalamus
Answer: Cerebellum
The cerebellum, located at the back of the brain, coordinates voluntary movements, maintains posture, and ensures balance. It receives sensory input and fine-tunes motor activities. [[NCERT Biology Class 11]]
The Indian Constitution is the longest written constitution in the world.
- True
- False
Answer: True
The Indian Constitution is the longest written constitution globally, with 395 Articles and 12 Schedules originally (now over 470 Articles and 25 Parts after amendments). It draws from multiple global sources. [[30]]
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]]