Science Notes

NEUTRON AND PROTON NEUTRON Neutrons are subatomic particles found in the nucleus of an atom, alongside protons. Here are some key points to understand about neutrons: 1. ** Charge **: Neutrons are electrically neutral, meaning they have no charge. This distinguishes them from protons, which are positively charged, and electrons, which are negatively charged. 2. ** Mass **: Neutrons have a mass slightly greater than that of protons. Compared to electrons, protons and neutrons have substantially larger masses. 3. ** Role in the Nucleus **: Neutrons play a crucial role in the stability of the nucleus. They help to offset the electrostatic repulsion between the positively charged protons. The nucleus would become unstable and disintegrate in the absence of neutrons. 4. ** Discovery **: The neutron was discovered in 1932 by the physicist James Chadwick. His discovery helped to further our understanding of atomic structure and led to significant advancements in nuclear physics. 5...

ISRO Indian Space Research Organisation (ISRO) related MCQ ISRO 1. *Where is the Indian Space Research Organization's (ISRO) headquarters located?**  a) Pune     b) Bangalore     c) Lucknow     d) Mumbai     **Answer: b) Bangalore** ¹ 2. **When was ISRO formed?**     a) 15 August 1947     b) 15 August 1952     c) 15 August 1969     d) 15 August 1967     **Answer: c) 15 August 1969** ¹ 3. **What is the Full Form of SDSC?**     a) Satish Development Space Centre     b) Scientific Development Space Centre     c) Satish Dhawan Space Centre     d) Static Development Space Centre     **Answer: c) Satish Dhawan Space Centre** ¹ 4. **Who was the first Indian to travel in space?**     a) Rakesh S...

SOLER SYSTEM MCQ Multiple-choice questions (MCQs) about the Solar System,with their answers and explanations  1. What planet is referred to as the Red Planet? A. Earth   B. Mars   C. Jupiter   D. Venus   ** Answer: B. Mars* *   **Explanation:** Mars is known as the Red Planet because of its reddish appearance, which is due to iron oxide (rust) on its surface. ### 2. What is the largest planet in our solar system? A. Earth   B. Mars   C. Jupiter   D. Saturn   ** Answer: C. Jupiter**   **Explanation:** Jupiter is the largest planet in our solar system, with a diameter of about 143,000 kilometers.  4. What is the smallest planet in our solar system? A. Mercury   B. Mars   C. Venus   D. Earth   ** Answer: A. Mercury**   **Explanation:** Mercury is the smallest planet in our solar system, with a diameter of about 4,880 kil...

EVS MCQ Here are 20 multiple-choice questions (MCQs) on Environmental Studies (EVS) along with their answers: 1. **Among these, which one is a renewable resource?**    - A) Coal    - B) Oil    - C) Solar Energy    - D) Natural Gas    - **Answer:** C) Solar Energy 2. **What is the main cause of global warming?**    - A) Deforestation    - B) Industrialization    - C) Greenhouse Gas Emissions    - D) Urbanization    - **Answer:** C) Greenhouse Gas Emissions 3. **Which gas is most responsible for the greenhouse effect?**    - A) Oxygen    - B) Nitrogen    - C) Carbon Dioxide    - D) Hydrogen    - **Answer:** C) Carbon Dioxide 4. **What is the primary source of water pollution?**    - A) Agricultural Runoff    - B) Wind Erosion ...

VIROLOGY @ADRE  Here are **20 multiple-choice questions (MCQs)** related to virology, along with their EXPLANATION VIROLOGY  1. **Who is considered the father of Virology?**    - a) Martinus Beijerinck    - b) Dmitri Ivanovsky    - c) John Ellerman    - d) Frederick Twort    - **Answer: a) Martinus Beijerinck**    - Explanation: Martinus Beijerinck is credited with discovering viruses and is often referred to as the father of virology¹. 2. **What is the study of viruses called?**    - a) Bacteriology    - b) Virology    - c) Mycology    - d) Phycology    - **Answer: b) Virology**    - Explanation: Virology is the scientific discipline that focuses on the study of viruses. 3. **Who discovered viruses?**    - a) John Ellerman    - b) Frederick Twort    - c) ...

CHEMISTRY MCQ PART 1 Here are 20 multiple-choice questions (MCQs) on chemistry with explanations for each answer: 1. **What is the atomic number of carbon?**    A) 6    B) 8    C) 12    D) 14    **Answer: A) 6**    Explanation: The atomic number represents the number of protons in an atom. Carbon has 6 protons. 2. ***What gas is often referred to as "laughing gas"?    A) Nitrous oxide    B) Carbon dioxide    C) Helium    D) Methane    **Answer: A) Nitrous oxide**    Explanation: Nitrous oxide, \( N_2O \), is commonly known as laughing gas due to its euphoric effects when inhaled. 3. **What type of bond is formed when electrons are shared between atoms?**    A) Ionic bond    B) Covalent bond    C) Metallic bond    D) Hydrogen bond    **A...

BACTERIA (ADRE) BACTERIA Bacteria are **single-celled microorganisms** that belong to the domain of prokaryotes, which means they have cells that lack a true nucleus and other organelles. They are incredibly diverse, existing in a variety of shapes and sizes, and can be found in virtually every environment on Earth, from soil to water to the human body. Here are some key characteristics of bacteria: - Cell Structure : Bacteria have a simple cell structure without a nucleus or other membrane-bound organelles. Their genetic material is contained in a single, circular DNA strand located in a region called the nucleoid¹. - Cell Wall : Most bacteria have a strong cell wall made of peptidoglycan, which provides shape and protection.Certain bacteria possess an extra coating on their exterior known as a capsule. Shapes : The three main shapes of bacteria are cocci (spherical), bacilli (rod-shaped), and spirilla (spiral-shaped). - Reproduction : Bacteria typically reproduce asexuall...

planets MCQ, part 2 ### Multiple Choice Questions on Planets #### Question 1 Which planet is known as the "Red Planet"? A. Venus   B. Mars   C. Jupiter   D. Saturn **Answer:** B. Mars   **Explanation:** Mars is known as the "Red Planet" because of its reddish appearance, which is due to iron oxide (rust) on its surface. #### Question 2 Which planet has the most extensive ring system? A. Earth   B. Neptune   C. Saturn   D. Uranus **Answer:** C. Saturn   **Explanation:** Saturn is famous for its prominent ring system, which is the most extensive and complex in the solar system. #### Question 3 What is the smallest planet in our solar system? A. Earth   B. Mars   C. Mercury   D. Venus **Answer:** C. Mercury   **Explanation:** Mercury is the smallest planet in our solar system, both in terms of diameter and mass. #### Question 4 Which planet is known for its Great Red Spot...

Science part 2 Here are 15 multiple-choice questions (MCQs) on various science topics along with short explanations for each: 1 * * What is the chemical symbol for water ?**    - A) H2O    - B) CO2    - C) O2    - D) H2    - ** Answer :** A) H2O    - 2. * *What type of macromolecule are enzymes?**    - A) Carbohydrates    - B) Lipids    - C) Proteins    - D) Nucleic acids    - ** Answer :** C) Proteins     3. ** What is the powerhouse of the cell? **    - A) Nucleus    - B) Mitochondria    - C) Ribosome    - D) Golgi apparatus    - ** Answer :** B) Mitochondria    - ** Explanation :** Mitochondria generate most of the cell's supply of ATP, used as a source of chemical energy. 4. ** Which element is the most abundant in the Earth's crust ?**    - A) Iron    - B) Oxygen    - C) Sili...

National Park part 2 Here are 20 multiple-choice questions (MCQs) on National Parks in India, complete with answers and short descriptions: 1. **Jim Corbett National Park** is located in which Indian state?    a) Madhya Pradesh    b) Uttarakhand    c) Rajasthan    d) Kerala    **Answer:** b) Uttarakhand    * Description :* Established in 1936 as Hailey National Park, Jim Corbett National Park is renowned for its Bengal tigers and is the oldest national park in India. 2. **Kaziranga National Park**, famous for its one-horned rhinoceroses, is in:    a) Assam    b) West Bengal    c) Gujarat    d) Tamil Nadu    **Answer:** a) Assam    * Description :* Kaziranga is a UNESCO World Heritage Site and hosts two-thirds of the world's great one-horned rhinoceroses. 3. The **Sundarbans National Park** is known for:  ...

SCIENCE PART 1  Here are 20 science multiple-choice questions (MCQs) with their answers: 1 **What is the powerhouse of the cell?**    - A) Nucleus    - B) Mitochondria    - C) Ribosome    - D) Endoplasmic reticulum    - **Answer: B) Mitochondria** 2. **What is the chemical symbol for gold?**    - A) Au    - B) Ag    - C) Go    - D) Gd    - **Answer: A) Au** 3. **What is the speed of light in a vacuum?**    - A) Approximately 300,000 km/s    - B) Approximately 150,000 km/s    - C) Approximately 400,000 km/s    - D) Approximately 200,000 km/s    - **Answer: A) Approximately 300,000 km/s** 4. **What type of bond is formed when electrons are shared between atoms?**    - A) Ionic bond    - B) Covalent bond    - C) Metalli...

NATIONAL PARK PART 1 Here are **18 multiple-choice questions (MCQs)** related to **National Parks in India**, along with their answers: 1. Palani Hills National Park is located in which state?    - a. None of these    - b. Madhya Pradesh    - c. Assam    - d. Tamil Nadu    - **Answer: d. Tamil Nadu** 2. Tadoba National Park is located in which state ?    - a. Maharashtra    - b. None of these    - c. Jharkhand    - d. Chhattisgarh    - **Answer: a. Maharashtra** 3 Mudumalai Sanctuary is famous for:    - a. Birds    - b. Bisons    - c. Tigers    - d. Elephants    - **Answer: c. Tigers** 4. Pin Valley National Park is situated in :    - a. Himachal Pradesh    - b. Madhya Pradesh    - c. Arunachal Pradesh    ...

Vitamin part 1,ADRE Here are **15 multiple-choice questions (MCQs)** related to vitamins : 1 Which food source has the highest levels of vitamin C?    - (a) Parsley    - (b) Broccoli    - (c) Black currants    - (d) Orange juice    - **Answer: (c) Black currants** 2. Which vitamin helps in blood clotting ?    - (a) Vitamin A    - (b) Vitamin C    - (c) Vitamin D    - (d) Vitamin K    - **Answer: (d) Vitamin K** 3 Which vitamin deficiency causes Beriberi?    - (a) Vitamin B1    - (b) Vitamin B2    - (c) Vitamin B6    - (d) Vitamin B12    - **Answer: (a) Vitamin B1** 4. Which vitamin functions as both a hormone and visual pigment?    - (a) Thiamine    - (b) Retinal    - (c) Riboflavin    - (d) Folic acid ...