Class XI

Excess acidity caused by acid rain can be neutralized by adding
  1. more fertilizers
  2. by removing acidified soil
  3. by adding P2O5
  4. by adding lime
Chemical formula of Disodium Hydrogen Phosphate is
  1. Na2HPO4
  2. Na2H3PO3
  3. Na2HPO4
  4. Na2H3PO4
Electricity is measured through a device called as
  1. Ammeters
  2. Voltmeters
  3. Barometers
  4. Anemometers
Word kinetic refers to
  1. locomotion
  2. vibration
  3. motion
  4. resonance
To record temperature of a liquid over time, devices used are called as
  1. Data loggers
  2. Scanners
  3. Bar code readers
  4. Probes
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