Science-Tech

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Which of the following devices can be used to detect radiant heat?
Liquid thermometer
no
Six’s maximum and minimum thermometer
no
Constant volume air thermometer
no
Thermopile
yes
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In which of the following phenomenon of total internal reflection of light is used?
Formation of mirage
yes
Working of binoculars
no
Formation of rainbow
no
Twinkling of stars
no
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Cactus is referred to as....
Hydrophyte
no
Mesophyte
no
Xerophytes
yes
Epiphyte
no
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Which of the following is not a noble gas?
Hydrogen
yes
Helium
no
Neon
no
Argon
no
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Which of the following resources is renewable one?
Uranium
no
Coal
no
Timber
yes
Natural gas
no
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Fleming’s right hand rule is used to find the direction of the.....
Alternate current
no
Direct current
no
Induced current
yes
Actual current
no
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Which one of the following is also known as solution?
A compound
no
A homogeneous mixture
yes
A heterogeneous mixture
no
A suspension
no
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Conversion of starch to sugar is essential for.....
Stomatal opening
yes
Stomatal closing
no
Stomatal formation
no
Stomatal growth
no
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Which of the following is very reactive and kept in kerosene?
Sodium
yes
Potassium
no
Iodine
no
Bromine
no
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Which of the following is a metallic ore?
Mica
no
Quartz
no
Feldspar
no
Galena
yes
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