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Friday, 6 March 2020

Chemistry- Questions and Answers 18

Chemistry- Questions and Answers 18
541. What is the commercial name of calcium nitrate? 
Norwegian saltpetre 

542. Which are the important phosphatic fertilisers? 
Calcium superphosphate, nitro phosphate & triple phosphate 

543. Which kind of fertiliser is Thomas slag? 
Phosphatic fertiliser 

544. What is the name of the mixture of nitrogenous, phosphatic & potash fertilisers in suitable amounts? 
NPK fertilisers 

545. Which is the example of fertiliser available in the gaseous form? 
Anhydrous ammonia 

546. What are the examples of thermoplastics? 
Polythene, nylon, celluloid & polystyrene 

547. What are the examples of thermo¬setting plastics? 
Bakelite, melamine, terylene & Glyptal 

548. used to kill unwanted plants?
Herbicides

549. Which was the first widely used herbicide?
2,4-D (2, 4- Dichlorophenoxyacetic acid) 

550. Which type of pesticides are atrazine & glyphosate?
Herbicides 

551. The chemicals used to treat lice are known as------- 
Pediculicides

552. Malathion & lindane are examples for which type of pesticides?
Pediculicides 

553. The category of pest control chemicals intended to kill rodents are known as------ 
Rodenticides 

554. Difethialone & Zinc phosphide are examples for which type of pesticides? 
Rodenticides

555. Endosulfan is an example of------
Organochlorine insecticide 

556. What is the fullform of DDT? 
Dichloro diphenyl trichloroethane 

557. In which year the Insecticides Act came into force in India? 
1968 

558. Which are the four colours used in the toxicity label of pesticides in India?
Red, Yellow, Blue & Green 

559. What is the colour of the label of the extremely toxic pesticides?
Red 

560. Which are the examples of red labelled pesticides?
Zinc phosphide & Monocrotophos 

561. What is the colour of the label of the pesticides having high toxicity?
Yellow 

562. Which are the examples of yellow labelled insecticides?
Endosulfan, carbaryl & quinalphos 

563. What is the colour of the label of the pesticides having moderate toxicity?
Blue 

564. Which are the examples of blue labelled pesticides?
Malathion, glyphosate & thiram 

565. Which colour is used to label the slightly toxic pesticides?
Green

566. What are the examples of green labelled pesticides? 
Mosquito repellant liquids & mancozeb 

567. Which polymer is used to make combs, phonograph records, handles of various utensils & electric switches?
Bakelite

568. Which polymer is used to make unbreakable crockery? 
Melamine - formaldehyde polymer 

569. Which polymer is used in the manufacturing of paints & lacquers?
Glyptal 

570. Which is the first fully synthetic fibre developed in 1931? 
Nylon 

571. Vegetable containing Sulphur: 
Cabbage

572. In refrigerators, the liquid used as refrigerant is:
Liquid ammonia 

573. The National chemical laboratory is situated in: 
Pune 

574. The substance that contains the maximum amount of nitrogen is: 
Urea

575. The branch of chemistry dealing with the accurate determination of amounts of various substance is called: 
Analytical chemistry

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