Question

Match the column I with column II in which formula for estimation of an element is given and mark the appropriate choice.

	Column I		Column II
(A)	Estimation of carbon	(i)	$$\frac{80}{188} \times \frac{w_{1}}{W} \times 100$$
(B)	Estimation of nitrogen	(ii)	$$\frac{62}{222} \times \frac{w_{1}}{w} \times 100$$
(C)	Estimation of bromine	(iii)	$$\frac{32}{233} \times \frac{w_{1}}{w} \times 100$$
(D)	Estimation of sulphur	(iv)	$$\frac{28}{22400} \times \frac{V}{w} \times 100$$
(E)	Estimation of phosphorus	(v)	$$\frac{12}{44} \times \frac{w_{1}}{w} \times 100$$

• A. (A) $\rightarrow$ (v), (B) $\rightarrow$ (ii), (C) $\rightarrow$ (iv), (D) $\rightarrow$ (i), (E) $\rightarrow$ (iii)
• B. (A) $\rightarrow$ (v), (B) $\rightarrow$ (iv), (C) $\rightarrow$ (i), (D) $\rightarrow$ (iii), (E) $\rightarrow$ (ii)
• C. (A) $\rightarrow$ (v), (B) $\rightarrow$ (iv), (C) $\rightarrow$ (ii), (D) $\rightarrow$ (i), (E) $\rightarrow$ (iii)
• D. (A) $\rightarrow$ (iv), (B) $\rightarrow$ (iii), (C) $\rightarrow$ (i), (D) $\rightarrow$ (ii), (E) $\rightarrow$ (v)

Answer 1

Answer: (B)

(A) $\rightarrow$ (v), (B) $\rightarrow$ (iv), (C) $\rightarrow$ (i), (D) $\rightarrow$ (iii),

$E$ $\rightarrow$ (ii)

Answer 2

: % of $C = \frac{12}{44} \times \frac{w_{1}}{w} \times 100$

($w_{1}$ = weight of $CO_{2},$ w = weight of organic compound)

% of $N = \frac{28}{22400} \times \frac{V}{w} \times 100$

(V = volume of $N_{2}$ at STP, w = weight of organic comopound)

% of $Br = \frac{80}{188} \times \frac{w_{1}}{w} \times 100$ ($w_{1}$ = weight ofAgBr)

% of $S = \frac{32}{233} \times \frac{w_{1}}{w} \times 100$ ($w_{1}$= weight of $BaSO_{4}$)

% of $P = \frac{62}{222} \times \frac{w_{1}}{w} \times 100$ ($w_{1}$ = weight of $Mg_{2}P_{2}O_{7}$)