Question
Below are two chemical equations: Zn (s) +
CuSO₄ (aq) → ZnSO₄ (aq) + Cu (s) Pb (s) + CuCl₂ (aq) → PbCl₂ (aq) + Cu (s) Why does copper get separated from its compound form in both the cases?Solution
The correct answer is D
Average age of company A is 25 years and average age of both companies A and B is 17 years. If the ratio of number of employees in company A and B is 3:...
The average of five even numbers is 64. If we replace two of these even numbers, 84 and 92, with a single even number X, the new average decreases by 4....
The average salary of 6 workers is (x + 5). If the average salary of the first three workers is ₹10,000 and that of the last three workers is ₹14,00...
- Rs. 4200 was distributed among 'P', 'Q', 'R' and 'S' in the ratio 2:5:4:3 respectively. Later, 'Q' gave an amount equal to 80% of the average amount receiv...
The average speed of a vehicle for a certain number of hours is 48 km/hr. If the vehicle travels 120 km in the next hour, the average increases by 2 km/...
32 × 15 + 60% of 200 = ? + 120
The average marks of 12 students in an exam is (x + 10). If the average of the first six students is 50 and that of the remaining six is 70, find the va...
Average marks scored by Vineet in five subjects are 80. The average marks scored by him (excluding his highest and lowest marks) are 72 and lowest marks...
The number of students in class 'A' is 140, and the ratio of girls to boys is 9:5. If the average number of boys in classes A and B is 160, and the aver...
- The average age of (x + 2) students of a class is 14 years. If the 56 years old class teacher is also included then average age of the class gets increased...
Relevant for Exams:
