Science : Mock Papers
Mock Question Paper 5
Q1. Which of the follwing is the best conductor of electricity?
A. Ordinary Water
B. Sea Water
C. Boiled water
D. Distilled water
Q2. Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?
A. Television
B. Tubelight
C. Cooking Gas
D. Refrigerator
Q3. The element common to all acids is
A. Carbon
B. Hydrogen
C. Oxygen
D. Sulphur
Q4. The most malleable metal is
A. Silver
B. Gold
C. Aluminium
D. Sodium
Q5. Which of the following is a non-metal that remains liquid at room temperature?
A. Bromine
B. Chlorine
C. Helium
D. Phosphorus
Q6. The gas usually filled in the electric bulb is
A. Hydrogen
B. Oxygen
C. Nitrogen
D. Carbon Dioxide
Q7. Which of the following is the lightest gas?
A. Nitrogen
B. Hydrogen
C. Ammonia
D. Carbon Dioxide
Q8. In which type of rocks are metals like gold and copper mostly found?
A. Old Igneous
B. Old Sedimentary
C. Old Metamorphic
D. New Metamorphic
Q9. Which of the following metals remains in liquid form under normal conditions?
A. Uranium
B. Radium
C. Zinc
D. Mercury
Q10. Actinides are elements with atomic numbers from
A. 36 to 43
B. 89 to 103
C. 97 to 114
D. 101 to 115
Q11. The average salinity of sea water is
A. 2%
B. 2.5%
C. 3%
D. 3.5%
Q12. The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of
A. Sulphur
B. Fluorine
C. Chlorine
D. Bromine
Q13. The inert gas which is substituted for nitrogen in the air, used by deep sea divers for breathing, is
A. Helium
B. Argon
C. Krypton
D. Xenon
Q14. The group of metals Fe, Co, Ni may be best called as
A. Alkali metals
B. Rare metals
C. Main group metals
D. Transition metals
Q15. Which radioactive pollutant has recently drawn the attention of the public, due to its occurrence in the building material?
A. Radium
B. Radon
C. Thorium
D. Plutonium
Q16. The isotope of uranium capable of sustaining chain reactions is
A. U-235
B. U-238
C. U-239
D. None of these
Q17. Atom bomb is based on the principle of
A. Nuclear fusion
B. Nuclear fission
C. Both A & B
D. None of these
Q18. Atoms are composed of
A. Electrons only
B. Electrons and Protons
C. Protons only
D. Electrons and Nuclei
Q19. Which of the following is used as a moderator in nuclear reactor?
A. Ordinary water
B. Radium
C. Thorium
D. Graphite
Q20. Rayon is chemically
A. Glucose
B. Amylose
C. Cellulose
D. Pectin
Q21. Which type of the fire extinguisher is used for petroleum fire?
A. Foam type
B. Soda acid type
C. Powder type
D. None of these
Q22. Which one of the following is the petroleum wax?
A. Bees wax
B. Carnauba Wax
C. Paraffin wax
D. Jojoba wax
Q23. Rubber is coagulated from latex by adding
A. Hydrochloric acid
B. Acetic acid
C. Sulphuric acid
D. Carbonic acid
Q24. Deep blue colour is imparted to glass by the presence of
A. Iron oxide
B. Cupric oxide
C. Nickel oxide
D. Cobalt oxide
Q25. Combustion is the process in which
A. Heat is produced
B. Light is produced
C. Heat and light are produced
D. None of these
Q26. A mixture of iron filings and sand can be separated by
A. Heating
B. Sublimation
C. Hand picking
D. Magnetic separation
Q27. The rate of chemical reaction does not depend upon
A. Concentration
B. Catalyst
C. Temperature
D. Pressure
Q28. Which of the following is a chemical change?
A. Magnetisation of iron
B. Melting of ice
C. Burning of sulphur
D. Melting of wax
Q29. Which of the following substances undergoes chemical change on heating?
A. Sodium chloride
B. Silica
C. Lead nitrate
D. Platinum wire
Q30. Electric current is measured by
A. Anemometer
B. Voltameter
C. Ammeter
D. Commutator