TEST PAPER SCIENCE 2

Q.1) Which endocrine gland is present in males but not in females?

Q.2) List two natural ecosystems.

Q.3) What is commercial unit of electrical energy? Represent it in terms of joule.

Q.4) What is the role of plane mirror and lateral inversion?

Q.5) How is ethene prepared from ethanol? Give reaction involved in it.

Q.6) In tobacco plant, the male gametes have twenty four chromosomes. What is the number of chromosomes in female gamete? What is the number of chromosomes in zygote?

Q.7) Explain the role of mouth in digestion of food.

Q.8) Mention the major events during photosynthesis.

Q.9) Give two methods to slow down rancidity.

Q.10) What constitutes the central and peripheral nervous system? How are the components of central nervous system protected?

Q.11) Write the formula and draw electron dot structure of carbon tetrachloride.

Q.12) What is saponification? Write the reaction involved in this process.

Q.13) What is electrical resistivity of the material? What is its unit? Describe an experiment to study the factors in which the resistance of conducting wire depends.

Q.14) Distinguish between pollination and fertilization. Mention the site and product of fertilization in a flower.

Q.15) Draw the ray diagram showing the image formation by a concave lens when object is placed at the focus of the lens.

For test paper 1 click here