Science Technology Subject Quiz

Q76. Which kind of light waves are used in the remote control of Television
(a) Visible light
(b) Infra - red
(c) X-ray
(d) None of the above

Q77. The technology which allows the user to access the Internet through the mobile phone without using a modem or computer
(a) PGRS
(b) RPGS
(c) SPGR
(d) GRPS

Q78. Which of the following elements is not present in fertilisers
(a) Nitrogen
(b) Hydrogen
(c) Chlorine
(d) Phosphorus

Q79. The first scientist to see the cell under a microscope was
(a) Robert Hooke
(b) A. V. Leeuwenhoek
(c) T. Schwann
(d) M. Schleiden

Q80. Litmus paper is prepared from the extract of
(a) Red Algae
(b) Lichens
(c) Gametophyte
(d) Fern Prothallus

Q81. Who discovered the electromagnetic nature of light
(a) Michael Faraday
(b) Young
(c) Huygen
(d) Maxwell

Q82. Ball pen functions on the principle of
(a) Lenz's law
(b) Surface tension
(c) Doppler effect
(d) Gravitational force

Q83. Which of the following principles is associated with Optical Fibre
(a) Scattering
(b) Interference
(c) Total Internal reflection
(d) Refraction

Q84. The colours of stars depend on
(a) Distance
(b) Temperature
(c) Atmospheric Pressure
(d) None of the above

Q85. Loudness of sound depends upon _________ of the sound wave
(a) Frequency
(b) Amplitude
(c) Wavelength
(d) Pitch

Q86. Rainbow is produced when sunlight falls on drops of rain. Which of the following phenomena are responsible for this
(a) Reflection
(b) Refraction
(c) Dispersion
(d) All of the above three

Q87. Which type of mirrors are used by Dentist to examine the teeth are
(a) Concave
(b) Convex
(c) Plain
(d) None of the above

Q88. Which one of the following is a bio indicator of air pollution
(a) Fern
(b) Lichen
(c) Money plant
(d) Dodder

Q89. The disease caused by deficiency of protein in children is
(a) Marasmus
(b) Pellagra
(c) Beri-beri
(d) Rickets

Q90. Genes are made-up of
(a) Nucleic acids
(b) Proteins
(c) Carbohydrates
(d) Lipids

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