Engineering Materials
Basic solution is one which has pH value

pH value has nothing to do with basic solution
Greater than 7
Equal to 7
Less than 7

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Engineering Materials
Cyaniding is the process of

Reacting steel surface with cyanide salts
Adding carbon and nitrogen by heat treatment of steel to increase its surface hardness
Obtaining cyanide salts
Dipping steel in cyanide bath

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Engineering Materials
Points of arrest for iron correspond to

There is nothing like points of arrest
Stages at which properties do not change with increase in temperature
Stages at which further heating does not increase temperature for some time
Stages at which allotropic forms change

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