TEST PAPER SCIENCE 1

1 MARK QUESTIONS

Q.1) Name the substance oxidised and reduced in the given reaction

MnO2 + 4HClv----> MnCl2 + 2H2O + Cl2

Q.2) What process in plants is known as transpiration?

Q.3) Write the SI unit of resistivity?

2 MARKS QUESTIONS

Q.4) Which among the following changes are exothermic and endothermic in nature?

a.) Decomposition of ferrous sulphate 

b.) Dilution of sulphuric acid

c.) Dissolution of sodium hydroxide in water

d.) Dissolution of ammonium chloride in water

Q.5) Why do we store silver chloride in dark coloured bottles?

Q.6) Name the correct substrates in the following enzymes

a.) Trypsin

b.) Amylase

c.) Pepsin

d.) Lipase

Q.7) How does use of a fuse wire protect electrical appliances?

Q.8) Three 2ohm resistors A,B and C are connected as shown below. Each of them dissipates energy and can withstand a maximum power of 18W without melting. Find the maximum current that can flow through the three resistors. 

3 MARKS QUESTIONS

Q.9) Differentiate between arteries and veins.

Q.10) Write the balanced chemical equation for the following reactions

A) Sodium carbonate on reaction with hydrochloric acid gives sodium chloride and sodium hydrogen carbonate.

B) Copper sulphate on treatment with potassium iodide precipitates cuprous iodide liberates iodine gas and also forms potassium sulphate.

Q.11) Explain why rate of photosynthesis in plants is low both at lower and higher temperature?

Q.12) State ohms law. How can it be verified experimentally? Does it hold good under all conditions? Comment.

For test paper 2 click here

For test paper 3click here