Metals and their compounds

41.blue is kinda
 
A. Copper sulphate
 
B. calcium sulfate
 
C. iron sulfate
 
D. sodium sulfate
 
Option”A” is correct
42.Which chemical is used to kill algae in water tanks?
 
A. Copper sulphate
 
B. magnesium sulfate
 
C. zinc sulfate
 
D. nitric acid
 
Option”A” is correct
43.From which ore is zinc metal mainly extracted?
 
A. zinc blade
 
B. calamine
 
C. zincite
 
D. Belemite
 
Option”A” is correct
44.Jawar Mines located in Rajasthan are famous for which mineral?
 
A. Copper
 
B. Iron
 
C. mica
 
D. such as
 
Option”D” is correct
45.The coating of which of the following on metals is called ‘Galvanizing’
 
A. such as
 
B. Copper
 
C. cadmium
 
D. tin
 
Option”A” is correct
46.What is the coating of zinc on water pipes made of iron to protect them from rust called?
 
A. zinc plating
 
B. alloying
 
C. vulcanization
 
D. rendition
 
Option”D” is correct
47.The disease of paddy is due to the deficiency of which element?
 
A. nitrogen
 
B. such as
 
C. calcium
 
D. magnesium
 
Option”B” is correct
48.Which of the following is a metal
 
A. chlorine
 
B. Zinc
 
C. Neon
 
D. iodine
 
Option”B” is correct
49.What is philosopher’s wool?
 
A. ZnO
 
B. ZnCO₃
 
C. ZnS
 
D. ZnSO₄
 
Option”A” is correct
50.White Vitriol is –
 
A. CuSO₄-5H₂O
 
B. ZnSO₄-7H₂O
 
C. FeSO₄-7H₂O
 
D. MgSO₄-7H₂O
 
Option”B” is correct