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  Class 10 Maths Assertion Reason Quiz | 50 Questions | StudyBeacon Class 10 Mathematics – Assertion & Reason Online Quiz (50 Questions) Options: A. Both A and R are true and R is the correct explanation B. Both A and R are true but R is not the correct explanation C. A is true but R is false D. A is false but R is true Q1. Assertion: HCF of two numbers divides their sum. Reason: HCF divides any linear combination of the numbers. A B C D Answer: A Show Answer Q2. Assertion: A polynomial of degree n has at most n zeroes. Reason: Graph of polynomial can intersect x-axis at most n times. A B C D Answer: A Show Answer Q3. Assertion: If two lines intersect, system has unique solution. Reason: Lines intersect at exactly one point. A B C D Answer: A Show Answer Q4. Assertion: Discriminant determines nature of roots. Reason: Discriminant is b²−4ac. A B C D Answer: B Show Answer Q5. Assertion: Common difference o...

  Class 10 Science Assertion Reason Quiz | 50 Questions | StudyBeacon Class 10 Science – Assertion & Reason Online Quiz (50 Questions) Instructions: Select the correct option and click Show Answer to reveal explanation. Options: A. Both A and R are true and R is the correct explanation B. Both A and R are true but R is not the correct explanation C. A is true but R is false D. A is false but R is true Q1. Assertion: Mitochondria are called powerhouse of the cell. Reason: They synthesize ATP during respiration. A B C D Answer: A Explanation: ATP is the energy currency produced by mitochondria. Show Answer Q2. Assertion: Anaerobic respiration produces less energy. Reason: Glucose is incompletely oxidized. A B C D Answer: A Explanation: Partial breakdown of glucose releases less energy. Show Answer Q3. Assertion: Alveoli increase efficiency of respiration. Reason: They provide large surface area. A B C D Answer: A...

  Class 10 Science Most Important MCQs | Top 25 Questions | StudyBeacon Home › Class 10 Science › Most Important MCQs Class 10 Science – 25 Most Important MCQs (All Chapters) These 25 MCQs are the highest-yield questions repeatedly asked or implied in CBSE exams. Focus on concepts, not memorization. Biology (Q1–Q9) Q1. Energy currency of cell is: [Easy] ADP ATP NADH FAD Answer: ATP stores usable energy. Q2. Which tissue transports food in plants? [Easy] Xylem Phloem Cortex Cambium Answer: Phloem → translocation. Q3. Site of fertilization in humans: [Easy] Uterus Fallopian tube Ovary Cervix Answer: Ampulla of oviduct. Q4. Which gas is released in photosynthesis? [Easy] CO₂ O₂ N₂ H₂ Answer: Oxygen is by-product. Q5. Longest part of human brain: [Moderate] Cerebellum Midbrain Medulla oblongata Pons Answer: Controls vital reflexes. Q6. Which blood vessels have valves? [Moderate] Arteries Vein...

Class 10 Science Sample Paper MCQ Quiz | CBSE | StudyBeacon Home › Class 10 Science › Sample Paper MCQs Class 10 Science – Full MCQ Sample Paper (25 Questions) Practice this complete MCQ-based sample paper prepared as per CBSE exam trend. Questions include PYQ-type, conceptual and application-based MCQs. Section A – Biology (Q1–Q9) Q1. Which process releases energy in cells? [Easy] Photosynthesis Respiration Transpiration Diffusion Answer: Respiration releases energy. Q2. Functional unit of kidney is: [Easy] Neuron Nephron Alveolus Villus Answer: Nephron filters blood. Q3. Which blood group is universal donor? [Moderate] AB+ A− O− B− Answer: O− lacks antigens. Q4. Main function of bile is: [Moderate] Digest protein Emulsify fats Digest starch Absorb glucose Answer: Bile breaks fat into droplets. Q5. DNA is located in: [Easy] Ribosome Cytoplasm Nucleus Vacuole Answer: DNA stores genetic info. Q6. ...

  Electrochemistry – Complete Formula Sheet (JEE Main Only) 1. Electrochemical (Galvanic) Cell Oxidation → Anode (−) Reduction → Cathode (+) Electron flow: Anode → Cathode Cell Representation: Anode | Anode electrolyte || Cathode electrolyte | Cathode Zn | Zn²⁺ || Cu²⁺ | Cu 2. Electrode Potential & Electrochemical Series Standard Hydrogen Electrode (SHE): H⁺(1M) | H₂(1 atm) | Pt(s) E° = 0 V More +ve SRP → Strong oxidising agent More −ve SRP → Strong reducing agent Low SRP metals → Highly reactive 3. EMF of a Cell Formula: E° cell = E° cathode − E° anode E cell = RP cathode + OP anode Spontaneity: E° cell > 0 → Spontaneous E° cell < 0 → Non-spontaneous 4. Nernst Equation E cell = E° cell − (0.0591 / n) log Q Example: Zn | Zn²⁺ || Cu²⁺ | Cu E cell = E° cell − (0.0591 / 2) log ([Zn²⁺]/[Cu²⁺]) 5. Relation between EMF, ΔG & Kc ΔG° = −nF E° cell E° cell = (0.0591 / n) log K c Condition Infer...

    Modern Physics – Complete & Elaborated Revision (JEE Main) Modern Physics explains physical phenomena where classical physics fails. In JEE Main, this chapter is highly scoring because questions are formula-driven but concept-sensitive . A small misunderstanding leads to a wrong option. 1. Dual Nature of Radiation and Matter Experiments like the photoelectric effect proved that light behaves not only as a wave, but also as a stream of particles called photons . Similarly, matter particles also show wave nature. (A) Photoelectric Effect When light of sufficiently high frequency falls on a metal surface, electrons are emitted instantaneously. This phenomenon cannot be explained using wave theory alone. Einstein’s Photoelectric Equation: $h\nu = \phi + K_{\max}$ Here, $h\nu$ is photon energy, $\phi$ is work function of metal, and $K_{\max}$ is maximum kinetic energy of emitted electrons. Important derived relations: $K_{\max} = h\nu - \p...

  Life Processes – PYQ Interactive Quiz Chapter: Life Processes | Class 10 Biology (NCERT) Score: 0 / 25 1. Which of the following are energy foods? (a) Carbohydrates and fats (b) Proteins and minerals (c) Vitamins (d) Water Check Answer 2. Nutrition from a living host without killing it: Saprotrophic Parasitic Holozoic Autotrophic Check Answer 3. Mode of nutrition in fungi: Parasitic Holozoic Autotrophic Saprotrophic Check Answer 4. Roots absorb water by: Diffusion Transpiration Osmosis Mass flow Check Answer 5. Site of photosynthesis: Chloroplast Mitochondria Cytoplasm Protoplasm Check Answer 6. Digestion in Amoeba occurs in: Food vacuole Mitochondria Pseudopodia Chloroplast Check Answer 7. Absence of salivary amylase affects: Starch digestion Protein digestion Vitamin absorption Fat digestion Check Answer 8. Digested food is absorbed in: Stomach Small intestine Large...