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Generate QuizScience – Fill in the Blank – GK Questions
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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]]