List of top Science Questions

Assertion : In human beings, the respiratory pigment is haemoglobin present in red blood cells.
Reason (R) : Haemoglobin has a very high affinity for carbon dioxide.
Assertion (A): Reflex actions do not involve thinking.
Reason (R): Most reflex actions are controlled by the spinal cord.
Draw the ray diagram for the image formation by a lens which shows a magnification of +2.
In human beings, the implantation of fertilised egg takes place in which part of female reproductive system?
How is a universal indicator obtained? How is the wide range of pH of solution tested by it?
Mention the gland and the hormone secreted by it in scary situation in human beings.
State two differences between the act of chewing food and salivation on sight of food.
Differentiate between Aerobic and Anaerobic respiration.
Write the chemical names, formulas, and uses of Baking Soda, Washing Soda, and Bleaching Powder.
Explain the Reactivity Series of metals and its importance in extraction.
Describe the process of Photosynthesis and write its balanced chemical equation.
Describe the structure of a Neuron and explain Reflex Action.
State Ohm’s Law and describe its V-I graph.
Explain Myopia and Hypermetropia with their causes and correction methods.
State the Laws of Reflection and Laws of Refraction of light.
Define Oxidation and Reduction with suitable examples.
State Fleming’s Left-Hand Rule and explain the principle of an electric motor.
Define Power of a Lens and state its S.I. unit.
How is the sex of a child determined in human beings?
What is Biological Magnification, and how does it affect different trophic levels?
What is the importance of DNA copying in reproduction?
Describe the process of Double Fertilization in flowering plants.
Distinguish between Sexual and Asexual reproduction with examples.
What is Transpiration, and how does it help in the upward movement of water in plants?
Define Reflex Action and explain the pathway of a Reflex Arc with an example.