| A student fixes a sheet of white paper on a drawing board using some adhesive materials |
| List two advantages of adopting the atomic number of an element as the basis of classification |
| The process of reproduction observed in yeast |
| The plants were wilting in a garden and the gardener watered the plants |
| A student took a small amount of copper oxide in a conical flask |
| An object of height 10 cm is placed 25 cm away |
| One half of a convex lens of focal length 10 cm is covered with a black paper |
| The absolute refractive index of Ruby is 1.7 |
| What is meant by power of a lens? Write its SI unit |
| What is meant by power of a lens? Define its S.I. unit |
| Draw the path of a ray of light when it enters one of the faces of a glass |
| Write the molecular formula of ethene and draw its electron dot structure |
| What is ozone? How is it formed in the upper layers of the Earth's atmosphere |
| In the human body the site of absorption of digested food is the small intestine |
| The most obvious outcome of the reproductive process is the generation of individuals |
| The ability of a medium to refract light is expressed in terms of its optical density |
| Draw a labelled diagram of the experimental set-up to study the action of steam on a metal |
| A student traces the path of a ray of light through a triangular glass prism for different values of angle of incidence |
| Draw the pattern of magnetic field lines produced around a current carrying straight conductor |
| The power of a lens is +4D. Find the focal length of this lens |
| Draw the electron-dot structure for ethyne. A mixture of ethyne and oxygen is burnt for welding |
| The most suitable method of raising a banana plant |
| Name and explain the two modes of asexual reproduction observed in hydra |
| Draw a labelled diagram of the set-up of a circuit |
| The melting points and boiling points of some ionic compounds |
| To get an enlarged, real and inverted image of an object |
| Define the following terms in the context of a diverging mirror |
| Consider the following electric circuit |
| Explain in brief how stability of DNA content |
| Draw ray diagrams to show the nature, position and relative size |
| What are chromosomes |
| Plants have neither a nervous system nor muscles, even then they |
| Write a test to identify the gas evolved (if any) |
| Name two metals which react violently with cold water |
| With the help of an activity, explain the conditions |
| Why can metals high up in the reactivity series |
| Displacement reactions also play a key role in extracting metals |
| Excessive use of chemicals and pesticides in agriculture |
| Define electric power. When do we say that the power consumed in an electric circuit is 1 watt |
| A wire of resistance R is cut into three equal parts |
| Draw labelled diagrams to show different stages of budding in Hydra |
| An object is placed at a distance of 60 cm from a concave lens |
| State the role of phloem in the transport of materials in plants. |
| The transport system in plants is relatively slower |
| Besides minimising the loss of blood |
| A student performs the following experiment in his school laboratory |
| The percentage of solar energy which is not converted |
| Which of the following groups do not constitute a food chain |
| An old person is suffering from an eye defect |
| Mirror ‘X’ is used to concentrate sunlight in solar furnace and Mirror ‘Y |