State TRUE or FALSE.
a. Lead is used to make paints.
b. The composition of solder is 65% copper and 35% zinc.
d. Nitrogen is used in the manufacturing of fertilisers.
e. Gold is used to make machine tools because of its low cost
and very high strength.
C. Silver is used in thermometers.
Answers
Answered by
4
Answer:
A)True
B)False
C)True
D)False
E)False
Answered by
7
(a) is TRUE
Bcoz Lead is added to paint to accelerate drying, increase durability, maintain a fresh appearance, and resist moisture that causes corrosion. It is one of the main health and environmental hazards associated with paint
(b) is FALSE
Bcoz Solder is not made up of Copper and Zinc, It is made up of tin and lead
(d) is TRUE
Bcoz Nitrogen fertilizers include many types of liquid and solid products, among which the most common ones are ammonia, ammonium nitrate, and urea. ... As a first step, nitric acid is produced by mixing ammonia and air in a tank followed by the absorption of the nitric oxide gas in water.
(e) is False
Bcoz Gold is not of low cost it has a very high cost.
(c) is TRUE
Bcoz Silver liquid indicates that the thermometer contains mercury, while red liquid is alcohol to which red coloring has been added. Although uncommon in modern thermometers, a clear color indicates water.
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