Consider the following reactions:NaCl + K_{2} | vedclass

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(C) The reactions are as follows:$4 NaCl + K_{2}Cr_{2}O_{7} + 6 H_{2}SO_{4} \rightarrow 2 CrO_{2}Cl_{2} (A) + 4 NaHSO_{4} + 2 KHSO_{4} + 3 H_{2}O$$CrO

Vedclass · Accepted Answer

$18$

Vedclass · Answer

(C) The reactions are as follows:$4 NaCl + K_{2}Cr_{2}O_{7} + 6 H_{2}SO_{4} \rightarrow 2 CrO_{2}Cl_{2} (A) + 4 NaHSO_{4} + 2 KHSO_{4} + 3 H_{2}O$$CrO_{2}Cl_{2} (A) + 4 NaOH \rightarrow Na_{2}CrO_{4} (B) + 2 NaCl + 2 H_{2}O$$Na_{2}CrO_{4} (B) + 2 H_{2}SO_{4} + 2 H_{2}O_{2} \rightarrow CrO_{5} (C) + 2 NaHSO_{4} + 3 H_{2}O$Identifying the compounds:$(A) = CrO_{2}Cl_{2}$ (Chromyl chloride),number of atoms $= 1 + 2 + 2 = 5$$(B) = Na_{2}CrO_{4}$ (Sodium chromate),number of atoms $= 2 + 1 + 4 = 7$$(C) = CrO_{5}$ (Chromium pentoxide),number of atoms $= 1 + 5 = 6$Sum of total atoms $= 5 + 7 + 6 = 18$.

Column $A$	Column $B$
$(1)$ Brass	$(a)$ $Ni$ $(60\%)$,$Cr$ $(40\%)$
$(2)$ Bronze	$(b)$ $Cu$ $(80\%)$,$Sn$ $(20\%)$
$(3)$ Cupronickel	$(c)$ $Cu$ $(90\%)$,$Sn$ $(10\%)$
$(4)$ Nichrome	$(d)$ $Cu$ $(70\%)$,$Zn$ $(30\%)$
	$(e)$ $Cu$ $(75-85\%)$,$Ni$ $(15-25\%)$

Similar Questions

Manganese achieves its highest oxidation state in which of the following compounds?

Indicate the steps in the preparation of:
$(i)$ $K_2Cr_2O_7$ from chromite ore.
$(ii)$ $KMnO_4$ from pyrolusite ore.

Guignet's green is known as

Thermal decomposition of a $Mn$ compound $(X)$ at $513 \ K$ results in compound $Y$,$MnO_2$ and a gaseous product. $MnO_2$ reacts with $NaCl$ and concentrated $H_2SO_4$ to give a pungent gas $Z$. Identify $X, Y$ and $Z$.

Match Column $A$ with Column $B$:

Column $A$ Column $B$

$(1)$ Brass $(a)$ $Ni$ $(60\%)$,$Cr$ $(40\%)$

$(2)$ Bronze $(b)$ $Cu$ $(80\%)$,$Sn$ $(20\%)$

$(3)$ Cupronickel $(c)$ $Cu$ $(90\%)$,$Sn$ $(10\%)$

$(4)$ Nichrome $(d)$ $Cu$ $(70\%)$,$Zn$ $(30\%)$

$(e)$ $Cu$ $(75-85\%)$,$Ni$ $(15-25\%)$

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