List of top Science Questions

Plants use variety of techniques to get rid of their waste materials. Some are mentioned below. Identify the incorrect one:

Identify the correct statement for spirogyra, leishmania and hydra

Assertion : Bacteria produced as a result of asexual reproduction would be similar. Reason (R): There would be only minor differences between the bacteria generated due to small inaccuracies in DNA replication.

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.

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 structure of a Neuron and explain Reflex Action.

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

Differentiate between Aerobic and Anaerobic respiration.

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

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

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

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

Explain Myopia and Hypermetropia with their causes and correction methods.

Define Oxidation and Reduction with suitable examples.