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Lower the pH, corrosion is :

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Important Questions on Electrochemistry

MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Rusting of iron is said to be an electrochemical phenomenon. Give reason for this.
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Define the term: Corrosion
Write two applications of electrochernical series.

EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
What is sacrificial protection?
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
In an examination 51% students fail in English and 45% fail in Maths. If 21%students fail in both the subjects, then 169 students pass the examination. What is the total number of students taking the exam?
 
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Match the following:

Group-A Group-B
(i) Corrosion (a) Lanthanides
(ii) Gold sol (b) Used in treatment of cancer

(iii) Radon

 (c) Purple of cassius
(iv) f-block elements

(d) Barbituric acid
(v) Tranquilizers (e) Hydrated ferric oxide.

 

EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
If A={x|x∈N,x is a prime number less than 12} and B={x|x∈N , x is factor of 10}, then A∩B=…
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Iron gets rust, but Gold doesn’t, why?
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
A survey shows that 63% of the people in a city read newspaper A whereas 76% read news paper B. If  x% of the people read both the newspapers, then a possible value of x can be:
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
To protect iron against corrosion the most durable metal plating on it is?
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Out of zinc and tin, whose coating is better to protect iron objects?
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
In a group of boys, 25 play volleyball, 20 play badminton and 10 boys play cricket. Five boys play all the three games. 8 boys play atleast two of the three games. How many of them play only one game? 
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Identify the correct statement:
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Two finite sets have m and n elements. The number of subsets of the first set is 112 more than that of the second. The values of m and n are respectively
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Let A={ 1,2,3,4,5,6,7,8,9,10 }. Then the number of subsets of A containing two or three elements is
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
If A⊂B, then AΔB is equal to
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
If nA=3, nB=6 and A⊆B, then the number of elements in A∪B is equal to
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
A survey shows that 73% of the persons working in an office like coffee, whereas 65% like tea. If x denotes the percentage of them, who like both coffee and tea, then x cannot be:
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Write two conditions necessary for the corrosion to occur. 
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Blocks of magnesium are fixed to the bottom of a ship to
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Galvanization is applying a coating of: