1081. When water is filled in a bottle and is allowed to freeze ,the bottle breaks because ________.

A. Water expands on freezing *
B. Bottle contracts at freezing point
C. Temperature outside the bottle is less than that inside the bottle
D. None of the above

1082. During a total solar eclipse there is most likely to be _____________.

A. A decrease in the rate of photosynthesis *
B. An increase in the rate of photosynthesis
C. A decrease in the rate of respiration
D. No effect on either photosynthesis or respiration

1083. Heating element of an electric heater is made up of ___________.

A. Tungsten
B. Graphite
C. Chromium
D. Nichrome *

1084. In an oil lamp, the oil rises up in the wick due to _________.

A. Capillary action *
B. Atmospheric pressure
C. Viscosity of oil
D. Change in temperature

1085. Acid rain contains high levels of __________.

A. Oxalic acid
B. Acetic acid
C. Sulphuric and nitric acid *
D. Carbolic acid

1086. Which one of the following would give the highest energy per gram ?

A. Glucose
B. Proteins
C. Fats *
D. Sucrose

1087. Which one of the following units represents the largest amount of energy?

A. Calorie *
B. Joule
C. Erg
D. Electron volt

1088. A woman’s voice is shriller than a man’s due to __________.

A. Higher frequency *
B. Higher amplitude
C. Lower frequency
D. Weak vocal chords

1089. Which gas is used in the preparation of soft drinks?

A. Oxygen
B. Carbon dioxide *
C. Nitrogen
D. Halogens

1090. Why are soft drinks made with chilled water rather than water at room temperature ?

A. Ingredients dissolve better in chilled water
B. Chilled water enhances the taste
C. Chilled water attracts more carbon dioxide *
D. Chilled water is more hygienic