Question
What happens if an iron nail gets immersed in CuSO4
solution for few minutes?Solution
When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed on the surface of iron and the colour of copper sulphate solution changes from blue to light green.
More ESIC Part B Questions
- Which of the following numbers is not a perfect square?
- Find the greatest value of the expression (p + q), if the number ‘2p618q0’ is divisible by 12.
Sum of squares of three consecutive numbers is 677. Find the sum of first and third number.
- If the number 8357pt is divisible by 15, how many values can 'p' take?
If the expression (px3 Â + x2 Â - 2x - q) is divisible by (x-1) and (x + 1), what are the values of
p and q respectively ?
Find the number of prime factors of 300?
The product of two positive numbers is 192. If one of the numbers is twice the other, then find the difference between the given two numbers.
If 193 × 199 + x makes the perfect square. Find the value of x
- The biggest three-digit number leaves 2 as a remainder when divided by 11, 9, and 4. What is the sum of its digits?
- 75% of 'A' equals (15/8) times 'B'. Determine the ratio A:B, assuming A and B are co-prime numbers.
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