List of top Science Questions

State two differences between pollination and fertilization.

Show the formation of ionic compound CaO with electron dot structure.

Paddy fields require a large amount of water. The pesticides and chemical fertilizers used are washed down into the soil or waterbodies. How do these chemicals reach our bodies? What is this phenomenon known as?

Which of the following is a poor conductor of electricity?

Assertion (A): Carbon shares its valence electrons with other atoms of carbon or with atoms of other elements.
Reason (R): The shared electrons belong to the outermost shells of both the atoms and lead to both atoms attaining the noble gas configuration.

The pattern of magnetic field due to a current carrying wire depends upon the shape made by that wire. Justify.

Draw the ray diagram for the image formation by a lens which shows a magnification of +2.

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.

Write the chemical names, formulas, and uses of Baking Soda, Washing Soda, and Bleaching Powder.

Describe the process of Photosynthesis and write its balanced chemical equation.

Describe the structure of a Neuron and explain Reflex Action.

Differentiate between Aerobic and Anaerobic respiration.

Explain the Reactivity Series of metals and its importance in extraction.

State Ohm’s Law and describe its V-I graph.

Explain Myopia and Hypermetropia with their causes and correction methods.

State Fleming’s Left-Hand Rule and explain the principle of an electric motor.

Define Oxidation and Reduction with suitable examples.

State the Laws of Reflection and Laws of Refraction of light.

Define Power of a Lens and state its S.I. unit.

What is Biological Magnification, and how does it affect different trophic levels?

How is the sex of a child determined in human beings?

What is the importance of DNA copying in reproduction?