Question

Let 1, 2, 3, … be a sequence of positive integers in arithmetic progression with common difference
. Also, let 1, 2, 3, … be a sequence of positive integers in geometric progression with common

ratio 2. If 1 = 1 = , then the number of all possible values of , for which the equality

2(1 + 2 + ⋯ +
) = 1 + 2 + ⋯ +

holds for some positive integer , is_________​

Answer 1

Answer:

C.Consider the given box ` MnO_(4)^(-) Ni^(2+) Pb^(2+) CrO_(4)^(-) CO_(3)^(2-) Na^(+) Cr_(2)O_(7)^(2-)` (i) Identify the colourless anion. (ii) Identify the colourless anion. (iii) Identify the green coloured cation. (iii) Identify the green coloured cation.

Answer 2

Answer:

Simple distillation is a method for separating the solvent from a solution. For example, water can be separated from salt solution by simple distillation. This method works because water has a much lower boiling point than salt. When the solution is heated, the water evaporates.