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👇👇DAILY SCIENCE MCQ, PART -1👇👇 ✧══════════• ❁❀❁ •═══════════✧

🌺PERIODIC TABLE MOST ASKED QUESTION IN EXAMS🌺 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔻🔻Most abundant element on earth's crust - Oxygen 🔺🔺Most abundant metal in earth's crust - Aluminium 🔻🔻Most abundant metalloid in earth's crust - Silicon 🔺🔺Most abundant element in atmosphere - Nitrogen 🔻🔻Most abundant element in the universe - Hydrogen 🔺🔺Most abundant element in human body - Oxygen 🔻🔻Most abundant gas in atmosphere - Nitrogen 🔺🔺Most abundant element in sea water - Chlorine 🔻🔻Most abundant element in moon's surface - Titanium 🔺🔺Most abundant metal present in human body and bones - Calcium 🔻🔻Most abundant metal compound in bones - Calcium phosphate 🔺🔺Most abundant compound on earth's surface - Water (H2O) 🔻🔻Most abundant compound in sea water - Sodium Chloride 🔻🔻Second most abundant compound in sea water - Magnesium Chloride 🔺🔺Most chemically reactive element - Fluorine 🔻🔻Second most chemically reactive element - Chlorine 🔺🔺The lightest and simplest element - Hydrogen 🔻🔻The lightest metal - Lithium 🔺🔺The rarest element in the earth - Astatine 🔻🔻The heaviest element - Osmium 🔺🔺The heaviest gaseous element - Radon 🔻🔻First man made element - Technetium 🔺🔺Most stable element - Lead 🔷🔷The periodic table is divided into 4 main blocks 👉👉*S block - elements of group 1 and 2 👉👉*P block - elements of group 13 to 18 👉👉*D block - elements of group 3 to 12 👉👉*F block - Lanthanides and Actinides ☂️☂️*The shortest period of the periodic table 🍁🍁Ans : First period ☂️☂️The longest period of the periodic table 🍁🍁Ans : Sixth period ☂️☂️Elements with atomic number 57-71 are known as 🍁🍁Ans : Lanthanides (rare earths) ☂️☂️Elements with atomic number 89-103 are known as 🍁🍁Ans : Actinides (radio active rare earths) ☂️☂️Total number of elements in periodic table 🍁🍁Ans : 118 ☂️☂️The number of naturally occurring elements 🍁🍁Ans : 92 #IMPORTANT_FOR_COMING_EXAMS🤞🤞 ✍️✍️CREDIT:-Krushna⭐️⭐️ 🏝🏝© Join Now:: @Daily_Science_Computer_Notes

Type & Uses (i) Milky Glass is prepared by adding tin oxide (SnO2), calcium phosphate [(Ca3(PO4)2] or cryolite (Na3AIF6) to the melt glass. (ii) Flint Glass contains lead oxide (PbO) and used in optical instruments like lenses, prisms. (iii) Soda or Soft Glass is sodium calcium silicate (Na2O. CaO. 6SiO2). It is the ordinary glass and used for making bottles, window panes, etc. (iv) Potash Glass or Hard Glass contains potassium carbonate (K2CO3). It has higher softening temperature. It is used for making beakers, flasks, funnel, etc. (v) Crown Glass contains potassium oxide (K2O), Barium oxide (BaO), boric oxide (B2O3) and silica (SiO2). It is used for optical apparatus. (vi) Crook's Glass contains cesium oxides. It is used for spectacles as it absorbs UV rays. (vii) Glass Laminates is made by fixing polymer sheet between layers of glass. It is used to make windows and screens of cars, trains and aircraft. (viii)Jena Glass contains B2O3 and alumina. It is resistant to acids and alkalies. It is used for making laboratory bottles, for keeping acids and alkalies.

🏝🏝*MOST IMPORTANT SCIENCE QUESTIONS*🏝🏝 ══════════════════♢.✰.♢═══════════════ 🔺🔺Circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. 🔺🔺Oscillatory motion is the repeated motion in which an object repeats the same movement over and over. 🔺🔺Rotational motion is the rotation around a fixed axis or about a fixed axis of revolution. 🏝🏝Atomic No & Mass No. Short Trick🏝🏝 #Trick - APEMAN👇👇 🎻🎻Atomic No. = No. of Protons = No. of Electrons 🎻🎻Mass No. = Atomic No. + No. of Neutrons Join Now 👉@Daily_Science_Computer_Notes 🏝🏝Isotopes, Isobars & Isotones Short Trick🏝🏝 #Trick - Bring Top Talented MAN (BTT MAN) ⛲️⛲️Atoms having same ☂️☂️Isobars → Mass Number ☂️☂️Isotopes → Atomic Number ☂️☂️Isotones → Neutrons #important ✍️✍️CREDIT:-Krushna⭐️⭐️ 🏝🏝 Join Now 👉@Daily_Science_Computer_Notes

🏝🔰Vitamin➖ Deficiency disease🔰🏝 ✧═════════• ❁❀❁ •══ ═ ══ ══ ════✧ 💠A➖ Night blindness 🌐B1➖ Beriberi 💠B2 ➖Ariboflavinosis 🌐B3 ➖Pellagra 💠B5➖ Paresthesia 🌐B6➖ Peripheral neuropathy 💠B7 ➖Dermatitis 🌐B9➖ Megaloblast and birth defects in pregnant ladies 💠B12 ➖Megaloblastic anemia 💠C➖ Scurvy 🌐D ➖Rickets and Osteomalacia 🌐E➖ anemia 💠K➖ Bleeding diathesis #IMPORTANT_FOR_COMING_EXAMS🤞🤞 ✍️✍️CREDIT:-Krushna⭐️⭐️ 🏝🏝© Join Now:: @Daily_Science_Computer_Notes

⛲️♻️🔷IMPORTANT SCIENCE NOTES🔷♻️⛲️ 🏝👉🏼Zeatin is produced in Roots and transported to Shoots in the xylem where it promotes cell division. 🏝👉🏼In 1676, the Danish astronomer Ole Roemer (1644–1710) became the first person to measure the speed of light. Until that time, scientists assumed that the speed of light was either too fast to measure or infinite. 🏝👉🏼Rain has a pH value of between 5.0 and 5.5, which is slightly acidic. 🏝👉🏼Isoelectronic have the same numbers of electrons or the same electronic structure . 🏝👉🏼Analog Computer system do not require any storage device. 🏝👉🏼The process of fertilization involves a sperm fusing with an ovum. The sperm plasma, then fuses with the egg's plasma membrane, the sperm head disconnects from its flagellum and the egg travels down the Fallopian tube to reach the uterus. 🏝👉🏼Sodium is the most electropositive and Chlorine is most electronegative element of the third period of modern periodic table. 🏝👉🏼Mainframe computers or mainframes are computers used primarily by large organizations for critical applications; bulk data processing, such as census, industry and consumer statistics, enterprise resource planning. It is also known as Big iron. 🏝👉🏼Which of the following hormone is not secreted by Pituitary gland? 1. Thyroid-stimulating hormone (TSH). 2. Prolactin 3. Vasopressin 4. Somatostatin☑️ 🏝👉🏼Somatostatin, also known as growth hormone-inhibiting hormone or by several other names, is a peptide hormone that regulates the endocrine system and affects neurotransmission and cell proliferation. #REVISION ✍️✍️CREDIT:-Krushna⭐️⭐️ 🏝🏝 Join Now 👉@Daily_Science_Computer_Notes

🏝MOST IMPORTANT PHYSICS FORMULAES🏝 ════════════♢.✰.♢═══════════════ ☂️☂️1. Work = force × distance कार्य = बल × दूरी 🎻🎻2. Energy = force × distance ऊर्ाय = बल × दूरी ☂️☂️3. Speed = distance / time गति = दूरी / समर् 🎻🎻4. Velocity= displacement / time वेग = तवस्थापन / समर् ☂️☂️5. Electric field = electrical force/charge तवद्युि क्षेत्र= वैद्युि बल/आवेश 🎻🎻6. Stress = force/area प्रतिबल=बल/क्षेत्रफल ☂️☂️7. Volume = length × width × height आर्िन = लंबाई × चौडाई × ऊं चाई 🎻🎻8. Mass density = mass/volume द्रव्यमान घनत्व =द्रव्यमान/आर्िन ☂️☂️9. Acceleration =velocity / time त्वरण = वेग / समर् 🎻🎻10. Power = work / time शति = कार्य / समर् ☂️☂️11. Pressure = force / area दाब =बल/क्षेत्रफल 🎻🎻11. Momentum = mass × velocity संवेग = द्रव्यमान × वेग ☂️☂️13. Area (A) = Length × Width क्षेत्रफल ( A ) = लम्बाई × चौडाई ☂️☂️14. Force (F) = Mass × Acceleration बल ( F ) = द्रव्यमान × त्वरण 🎻🎻15. Pressure Energy = Pressure × Volume दाब ऊर्ाय = दाब × आर्िन ☂️☂️16. Impulse = force × time आवेग = बल × समर् 🎻🎻17. Linear momentum = mass × velocity रैतिक संवेग = द्रव्यमान × वेग ☂️☂️18. Kinetic energy = 1/2 mv² गतिर् ऊर्ाय = 1/2 mv² 🎻🎻19. Mechanical energy = kinetic energy + potential energy र्ांतत्रक ऊर्ाय = गतिर् ऊर्ाय + तस्थतिर् ऊर्ाय ☂️☂️20. Angular momentum = Inertial × Angular velocity कोणीर् संवेग = र्डत्वाघूणय × कोणीर् वेग #REVISION ✍️✍️CREDIT:-Krushna⭐️⭐️ 🏝🏝 Join Now 👉@Daily_Science_Computer_Notes

🏝🏝TOP SCIENCE BY KRUSHNA🏝🏝 ☂️☂️1st noble gas group in the periodic table Ans : Helium ☂️☂️*Second lightest element Ans : Helium ☂️☂️*The element shows highest thermal conductivity Ans : Helium ☂️☂️*2nd most abundant element in universe Ans : Helium ☂️☂️*Product of nuclear fusion Ans : Helium 4 ☂️☂️*Discovered by Ans : Pierre Janssen and Norman Lockyer ☂️☂️*Liquid Helium is used as Ans : Cryogenic refrigerant ☂️☂️*Preferred for filling the weather balloons and air ships ☂️☂️*The elements used for the treatment of Asthma Ans : Helium and Oxygen ☂️☂️*The elements used in welding are Ans : Helium and Argon ☂️☂️*Helium is non-inflammable in nature #REVISION ✍️✍️CREDIT:-Krushna⭐️⭐️ 🏝🏝 Join Now 👉@Daily_Science_Computer_Notes

🔺🏝🌟Important Cells 🌟🏝🔺 ☂️☂️1. Ganglion cells- Found in retina ☂️☂️2. Bipolar cells- Found in retina ☂️☂️3. Photoreceptor cells- Found in retina ☂️☂️4. Rod cells- For twilight (scotopic vision) ☂️☂️5. Cone cells- For day light (photopic vision) ☂️☂️6. Organ of Corti contains hair cells ☂️☂️7. Adipocytes- Cells of adipose tissue ☂️☂️8. PMNL (Polymorpho Nuclear Leukocytes)- A type of neutrophil providing cellular barrier in innate immunity. ☂️☂️9. Natural killer cells- Type of lymphocyte providing cellular barrier. ☂️☂️10. Macrophages- Present in tissue (areolar tissue) that can phagocytose & destroy microbes providing cellular barrier. ☂️☂️11. Inner cell mass of human blastocyst contains stem cells which have the potency to give rise to all the tissues & organs. ☂️☂️12. The epithelial cells of Bowman’s capsule called podocytes. #REVISION ✍️✍️CREDIT:-Krushna⭐️⭐️ 🏝🏝 Join Now 👉@Daily_Science_Computer_Notes

❇️ Chemical Formula❇️ ======================= ✶ simple salt ➠ NaCl ✶ Baking Soda ➠ NaHC O₃ ✶ wash soda ➠ Na₂CO₃ · 10H₂O ✶ caustic soda ➠ NaOH ✶ Alum K➠SO₄ · Al₂ (SO₄) ₃ · 24H₂O ✶ red medicine ➠ KMnO₄ ✶ caustic potash ➠ KOH ✶ lime water ➠ Ca (OH) ₂ ✶ gypsum ➠ CaSO₄ · 2H₂O ✶ Plaster of Paris ➠ CaSO₄ · ½H₂O ✶ chalk ➠ CaCO₃ ✶ limestone ➠ CaCO₃ ✶ marble ➠ CaCO₃ ✶ saline ➠ NH₄Cl ✶ Laughing Gas ➠ N₂O ✶ Lithrage ➠ PbO ✶ Galena ➠ PbS ✶ white lead ➠ 2PbCO₃ · Pb (OH) ₂ ✶ salt acid ➠ HCl ✶Amiraj ➠HNO₃ + HCl (1: 3) ✶ dry ice ➠ CO₂ ✶ horn silver ➠ AgCl ✶ heavy water ➠ D₂O ✶ Producer Gas ➠ CO + N₂ ✶ Marsh Gas ➠ CH₄ ✶ vinegar ➠ CH₃COOH ✶ Alcohol ➠ C₂H₅OH ✶ Chinese ➠ C₁₂H₂₂O₁₁ ✶ urea ➠ NH₂CONH₂ ✶ benzene ➠ C₆H₆ 🔷🔷🔴💠💠☂️☂️💠💠☂️☂️💠💠🔴🔷🔷 ●▬▬▬▬⚜️۩۞۩⚜️▬▬▬▬●