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Wednesday, 12 February 2020

General Science: Questions and Answers (Chapter: 21)

General Science: Questions and Answers 
(Chapter: 21)

656. Which chemical property of an element is described by the Pauling scale?
Electronegativity 

657. What is the full form of the LED?
Light Emitting Diode 

658. Which metal is used in the catalytic converters in cars to reduce the pollution from exhaust gases? 
Platinum

659. Bertrandite & phenakite are the minerals of?
Beryllium 

660. Which layer of the atmosphere is the 'meteor region'? 
Mesosphere

661. Which is the second most abundant salt in seawater?
Magnesium chloride 

662. The Solvay Process or Ammonia - Soda Process is the major industrial process for the production of? 
Sodium Carbonate

663. Which element's isotope has the longest ever half-life period? 
Bismuth (Bismuth-209)

664. Which scientific instrument is used to detect Dark Matter?
Scintillating Bolometer 

665. Name the soil type which is rich in iron & aluminium, formed in hot and wet tropical areas? 
Laterite

666. One of the important ore of which metal is Gibbsite?
Aluminium 

667. Which element has the largest number of stable isotopes? 
Tin (10)

668. Which metal's major mineral is celestine? 
Strontium

669. The Cumene Process or Hock process is used for synthesizing.............
Phenol 

670. The natural diamonds are classified into four types according to the presence of in their crystals?
Nitrogen 

671. The topographical features of creatures of which planet are named after Beethoven, Milton, Mozart, Ibsen and Kurosawa?
Mercury 

672. Which chemical compound is also known in the names of 'Chameleon mineral & Condy's crystals'?
Potassium permanganate 

673. The Bomb calorimeter is used to measure a particular reaction?
Heat of combustion 

674. E- numbers are codes for chemicals which can be used as? 
Food additives

675. Which chemical has the nick¬name of'Mosaic Gold'?
Tin sulfide 

676. What is considered as the most abundant organic com¬pound on Earth Surface?
Cellulose 

677. Bowieite and rhodplumsite are the minerals of which metal? 
Rhodium

678. Which is the only metal to be named after an asteroid?
Palladium 

679.  Which is the most electroneg¬ative element? 
Fluorine

680. What is known as the 'Universal Fibre'?
Cotton 

681. Which metal is produced through the Hall-Heroult process?
Aluminium 

682. Which chemical is used in the treatment of cyanide poison¬ing?
Sodium thiosulfate 

683. The speed of a missile is mentioned in the unit of 
Mach

684. Which chemical is known as 'Epsom Salt'? 
Magnesium Sulfate

685. The ability of a substance to attract and hold water molecules from the surrounding environment is known as-------------------.
Hygroscopy 

686. Which constellation has the most stars that can be seen with the naked eye?
Centaurus 

687. Who is the only scientist to lead India's both Antarctic and Arctic expedition teams?
Dr Rasik Ravindra 

688. Which element has the highest melting point? 
Carbon 

689. Which device is used to convert sound waves into electric waves?
Microphone 

690. Which technique is used to transmit audio signals in television broadcast?
Frequency modulation 

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