“The Knowledge Library”

Knowledge for All, without Barriers…

An Initiative by: Kausik Chakraborty.

“The Knowledge Library”

Knowledge for All, without Barriers……….
An Initiative by: Kausik Chakraborty.

The Knowledge Library

Chemistry- Questions and Answers – 16

471. The geosynchronous satellites orbit——- km above the earth? 
36,000 km 

472. Which substance has the highest expansivity in normal temperature?

473. What is known as ‘Blue Gold’?

474. Which organism can travel in accordance with the magnetic field of the earth?

475. Bessemer process is associated with the production of——? 

476. Who invented revolver?
Samuel Colt 

477. What is the unit of potential difference?

478. What is known as ‘the Metal of the Future’?

479. In the International System of Units, the mole is the unit of——? 
Amount of substance

480. Which chemical compound is the main constituent of natural gas?

481. Which chemical has the nick-name of ‘the Butter of Zinc’?
Zinc Chloride 

482. Which chemical compound is also known in the names of ‘Prussian blue, Parisian Blue & Berlin Blue’?
Ferric ferrocyanide 

483. Which element is industrially produced through the Claus Process?

484. What is known as ‘the Magic Metal of Life’? 

485. Which acid is usually stored in plastic containers due to its high reactivity toward glass?
Hydrofluoric Acid 

486. Which element forms the largest number of solid allotropes? 

487. Which chemical is produced through the Raschig Process? 

488.  Which chemical has the nick¬name of the Salt of Hartshorn’? 
Ammonium Carbonate 

489. Exposure to which heavy metal causes Acrodynia or Pink disease in children?

490. Which compound of mercury is also known as ‘red mercury’? 
Mercury iodide 

491. What colour phenolphthalein turns in the presence of bases? 

492. What colour is shown by a neutral solution in the universal indicator?

493. Which chemical acts as the chief agent in attracting mosquitoes to humans? 
Lactic Acid

494. What is the most commonly used de-icing chemical? 
Sodium chloride (Table salt)

495. Which chemical is also known as ‘hot ice’? 
Sodium acetate 

496. Which acid is present in the urine of the horses? 
Hippuric acid 

497. Which chemical is used to make power glues & superglues?

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

499. What is the most widely used food additive to prevent botulism?
Sodium nitrite 

500. What is the commonly used radio wave frequency in the microwave ovens to heat food?
2,500 megahertz 

501. Which chemical was historically known as ‘magnesia alba’? 
Magnesium oxide (Magnesia) 

502.  Which chemical is also known in the nickname of the English Salt’? 
Magnesium sulphate 

503. The presence of which biological molecules are detected through the Molisch’s test? 

504. What was the major invention made by the American physicist Chester Carlson?

505. Which chemical is also known as ‘the Oil of Wintergreen’? 
Methyl Salicylate

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