Question
Which of the following dyes is used for colouring Paper
and typewriters?Solution
Triphenyl Dyes contains the paraquinoid moiety as a chromophore and -OH, -NH₂ as auxochrome. these dyes are not fast to light and washing and hence used for colouring Papers or typewriters.
The sum of three numbers is 212. If the ratio of the first to the second is 3:5 and that of second to the third is 7:10 then the second number is?
- If ‘A’, ‘B’ and ‘C’ are in proportion in the given order while ‘A’ = 20 and ‘B’ = 40, then find the value of ‘C’.
- If ‘A’, ‘B’ and ‘C’ are in proportion in the given order while ‘A’ = 9 and ‘B’ = 45, then find the value of ‘C’.
Rs 2279 was divided among Anil, Bhanu and Charan in the ratio of 16:9:18 respectively. Find the amount received by Anil and Bhanu together.
The ratio of investment of A and B is 2 : 5 and that of B and C is 3 : 7. Find the investment of B if sum of investment of A, B and C is Rs. 33600.
The ratio between two numbers is 4:5. If each number is increased by 6, the ratio between then become 7:8, find the difference between numbers.
- If the mean proportion of 1.44 and 4 is 'k', then find the value of '5k'.
A sum is distributed among A, B and C is the ratio 8: 4: 3 and A divides its part between D and E in the ratio 9: 7, then what is the ratio of part of C...
What is the mean proportion between 4 and 36?
Two numbers are respectively 40% and 20% more than a third number. Find the ratio of two numbers.
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