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Friday, 6 March 2020

Chemistry- Questions and Answers 16

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?
Caesium 

473. What is known as 'Blue Gold'?
Water 

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

475. Bessemer process is associated with the production of------? 
Steel 

476. Who invented revolver?
Samuel Colt 

477. What is the unit of potential difference?
Volt 

478. What is known as 'the Metal of the Future'?
Titanium 

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?
Methane 

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?
Sulfur 

484. What is known as 'the Magic Metal of Life'? 
Calcium 

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? 
Sulfur 

487. Which chemical is produced through the Raschig Process? 
Hydroxylamine 

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?
Mercury 

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

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

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

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?
Cyanoacrylate

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

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? 
Carbohydrates

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

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

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