Single Choice

A salt, when warmed with zinc powder and an $$NaOH$$ solution, gives a gas that turns a filter paper soaked with an alkaline solution of $$K_2[HgI_4 ]$$ brown. The salt responds to the brown ring test when acetic acid is used in place of sulphuric acid. The anion present in the salt is :

A$$NO_3^{-}$$
B$$NO_2^{-}$$
Correct Answer
C$$Br^-$$
Dnone of these

Solution

SIMILAR QUESTIONS

Chemistry Practical

A bromide ion does not interfere with the chromyl chloride test, because when a bromide is present :

Chemistry Practical

An organic compound (A) on heating produces two gases (B) and (C) and neutral oxide (D) which turns cobalt chloride paper pink. Gas (B) turns lime water milky and produces an acidic solution, with water. Gas (C) produces a poisonous gas (E) with chlorine gas, this gas with ammonia gives an organic compound (F) which on further reaction with (D) gives $$NH_3$$ gas. Then, compounds (A) and (F) can be found as:

Chemistry Practical

Give the correct order of initials T or F for following statements. Use T if statement is true and F if it is false. (i) $$Cu^+$$ undergoes disproportionation to $$Cu$$ and $$Cu^{2+}$$ in aqueous solution. (ii) $$Hg_2Cl_2$$ does not impart chromyl chloride test. (iii) Sulphide ions react with sodium nitroprusside to form a purple coloured complex. In this reaction, oxidation state of iron changes.

Chemistry Practical

Match the following. (I) $$HCO_2^-$$ (P) Obtained through Solvay's process (II) $$K_2CO_3$$ (Q) Green colouration due to $$[Cr(H_2O)_6]^{3+}$$ ion (III) $$S_2O_3^{2-} + FeCl_3$$ solution (R) Reduces $$[Cu(C_4H_4O_6)_2]^{2-}$$ to red ppt. (IV) $$SO_2^{3-} + K_2 Cr_7 O_7 / H^+$$ (S) Green colouration (V) $$Na_2 CO_3$$ (T) Melts at 850 $$^o$$C

Chemistry Practical

Which of the following statement is incorrect? (I) In S2O 2− 3 both sulphur are different in nature. (II) Sodium acetate and lead acetate on heating giving the same type of product, whereas Mn, Sn, Fe oxalate salt giving different types of products. (Ill)Aqueous solution OCl−,S2− and CO 2− 3 basic in nature. (IV)NO − 2 oxidises I− whereas Br2 and Cl2 oxidises NO − 2

Chemistry Practical

(A) + NaCl $$\rightarrow$$ (B) (white ppt.) (B) + KI $$\rightarrow$$ (C) (green ppt.) (C) + $${\underset {(\text{excess})}{KI}} \rightarrow$$ (D) + (E) (colorless solution) (E) + $$NH_3$$ + KOH $$\rightarrow$$ (F) When compound (A) reacts with $$Na_2CrO_4$$ solution, the color of the compound formed is________.

Chemistry Practical

When colourless solution (C) reacts with $$Pb_3O_4/H^+$$, it acquires a violet red colour due to formation of__________.

Chemistry Practical

The structure of compound (A) is:

Chemistry Practical

The brown solution obtained in (i) is due to_________.

Chemistry Practical

Which of the following reactions takes place in (ii)?

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