A plant leaf appear to green because it
(a) absorbs green light
(b) reflects all but yellow and green light
(c) reflect green light-✔️
(d) absorbs red and yellow light
A periscope works by the principle of
(a) Refraction
(b) Total Internal reflection-✔️
(c) Diffraction
(d) Reflection and refraction
A mixure of solid Al2O3 and Fe2O3 can be separated by the method of
(a) Forth floatation
(b) Magnetic separation-✔️
(c) Gravity separation
(d) Dissolving in Water
A hollow cylindrical rod is filled with air, to make it a resonance column. To produce a
wave of length 48 cm the minimum length of rod should be
(a) 12 cm
(b) 24 cm-✔️
(c) 48 cm
(d) 96 cm
Which of the following is most likely to cause a rise in the average temperature of the Earth in the future?
(a) Atomic warfare
(b) CO2 from fossil fuels-✔️
(c) Dust clouds from volcanoes
(d) Depletion of the Earth's Ozone layer
A healthy freshwater fish is placed in saltwater. The expected consequence of this would be that
(a) the fish becomes dehydrated and dies-✔️
(b) the fish becomes bloated and dies
(c) the fish suffers from fungal or bacterial disease and dies
(d) ther is no observable effect on the fish provided there is sufficient food
A difference of 1 degree in longitude at the Equator is equivalent to nearly
(a) 101 km
(b) 111 km-✔️
(c) 121 km
(d) 125 km
A cell cycle consists of
(a) mitosis and meiosis
(b) G1, the S phase, and G2
(c) Prophase, metaphase, anaphase and telophase
(d) Interphase and mitosis-✔️
Which of the following poses the greatest safety risk when heated in laboratory?
(a) A mixture of iron and sulfur
(b) mercury(II) oxide-✔️
(c) Sodium chloride
(d) Copper(II) sulfate hydrate
A boy has five resistance of 1/5 ohm each. The maximum resistance that can be formed with them is
(a) 0.5 ohm
(b) 1 ohm-✔️
(c) 1/25 ohm
(d) 1/5 ohm
(a) absorbs green light
(b) reflects all but yellow and green light
(c) reflect green light-✔️
(d) absorbs red and yellow light
A periscope works by the principle of
(a) Refraction
(b) Total Internal reflection-✔️
(c) Diffraction
(d) Reflection and refraction
A mixure of solid Al2O3 and Fe2O3 can be separated by the method of
(a) Forth floatation
(b) Magnetic separation-✔️
(c) Gravity separation
(d) Dissolving in Water
A hollow cylindrical rod is filled with air, to make it a resonance column. To produce a
wave of length 48 cm the minimum length of rod should be
(a) 12 cm
(b) 24 cm-✔️
(c) 48 cm
(d) 96 cm
Which of the following is most likely to cause a rise in the average temperature of the Earth in the future?
(a) Atomic warfare
(b) CO2 from fossil fuels-✔️
(c) Dust clouds from volcanoes
(d) Depletion of the Earth's Ozone layer
A healthy freshwater fish is placed in saltwater. The expected consequence of this would be that
(a) the fish becomes dehydrated and dies-✔️
(b) the fish becomes bloated and dies
(c) the fish suffers from fungal or bacterial disease and dies
(d) ther is no observable effect on the fish provided there is sufficient food
A difference of 1 degree in longitude at the Equator is equivalent to nearly
(a) 101 km
(b) 111 km-✔️
(c) 121 km
(d) 125 km
A cell cycle consists of
(a) mitosis and meiosis
(b) G1, the S phase, and G2
(c) Prophase, metaphase, anaphase and telophase
(d) Interphase and mitosis-✔️
Which of the following poses the greatest safety risk when heated in laboratory?
(a) A mixture of iron and sulfur
(b) mercury(II) oxide-✔️
(c) Sodium chloride
(d) Copper(II) sulfate hydrate
A boy has five resistance of 1/5 ohm each. The maximum resistance that can be formed with them is
(a) 0.5 ohm
(b) 1 ohm-✔️
(c) 1/25 ohm
(d) 1/5 ohm
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