Related Questions

When an iron nail gets rusted, iron oxide is formed
A Without any change in the weight of the nail
B With decrease in the weight of the nail
C With increase in the weight of the nail
D Without any change in colour or weight of the nail
Iron is a useful metal. Here iron is
A an adjective
B a noun
C an adverb
D a verb
How many iron rods, each of length 7 m and diameter 2 cm can be made out of 0.88 m3 of iron?
A 400
B 200
C 300
D 100
If you need 98 ounces of iron and 2 ounces of carbon to make a sheet of steel. How much iron you need in ounces to make 12 sheet steel?
A 98
B 50
C 49
D 198
Iron is a useful metal. এখানে ‘Iron’ শব্দটি কোন প্রকারের Noun ?
A Proper Noun
B Material Noun
C Collective noun
D Common Noun
Iron is a useful metal. এখানে 'Iron' শব্দটি কোন প্রকারের noun?
A Proper Noun
B Collective Noun
C Common Noun
D Material Noun
Which of the following is added to iron to make iron hard and strong?
A Zinc
B Copper
C Carbon
D Sodium
Which of the following metals displaces Iron from Iron Chloride?
A Lead
B Zinc
C Tin
D Silver
Hematite iron ore contains iron about
A 30%
B 45%
C 55%
D 70%
When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron.
A Cementite
B Free graphite
C Both A and B
D None of these

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