Preparation o...

Preparation of HF

Trending Questions

Q. Assertion :

{C N}^{-}

ion is an ambident nucleophile. Reason: Nucleophiles are electron rich species.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion is correct but Reason is incorrect
Assertion is incorrect but Reason is correct

View Solution

Q. The

H F_{2}^{-}

ion exists in the solid state and also in liquid HF solution but not in dilute aqueous solution because:

$H_{3} O^{+} a n d F^{-}$ are much more likely to be formed in an aqueous solution
HF is weaker acid than $H_{2} O$
HF has H - bonding
None of these

View Solution

Q. If

N a^{+}

ion is larger than

M g^{2 +}

ion, and

S^{2 -}

ion is larger than

C l^{-}

ion, which of the following will be less soluble in water?

$N a C l$
$M g C l_{2}$
$M g S$
$N a_{2} S$

View Solution

Q. The

H F_{2}^{-}

ion exists in the solid state and also in liquid HF solution but not in dilute aqueous solution because:

$H_{3} O^{+} a n d F^{-}$ are much more likely to be formed in an aqueous solution
HF is weaker acid than $H_{2} O$
HF has H - bonding
None of these

View Solution

Q. How much

N H_{3}

should be added to a 0.004 M

A g^{+}

solution to prevent the precipitation of AgCl when

C l^{-}

ion reaches 0.001?

K_{s p} A g C l = 1.8 \times 10^{- 10}, K_{d} A g (N H_{3})_{2}^{+} = 6 \times 10^{- 8}

0.0011 molar
0.36 molar
0.0036 molar
1.6 molar

View Solution

Q. Assertion: Due to common ion effect, the solubility of

H g I_{2}

is expected to be less in an aqueous solution of KI than in water. But

H g I_{2}

dissolves in an aqueous solution of KI to form a clear solution.
Reason:

I^{⊝}

ion is highly polarisable.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Assertion is correct but Reason is incorrect
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion is incorrect but Reason is correct
Both Assertion and Reason are incorrect

View Solution

Q. The

H F_{2}^{-}

ion exists in the solid state and also in liquid HF solution but not in dilute aqueous solution because:

$H_{3} O^{+} a n d F^{-}$ are much more likely to be formed in an aqueous solution
HF is weaker acid than $H_{2} O$
HF has H - bonding
None of these

View Solution

Q. Assertion :

C u^{+}

ion is unstable in aqueous solution, whereas

F e^{2 +}

ion is stable. Reason:

C u^{+}

disproportionate in aqueous solution.

Statement -1 is true, statement-2 is true; statement-2 is a correct explanation for statement-1
Statement -1 is true, statement -2 is true; statement-2 is NOT a correct explanation for statement-1
Statement-1 is true, statement -2 is false
Statement -1 is false, statement -2 is true

View Solution

Q. A coordination compound

C r C l_{3} .4 H_{2} O

gives white precipitate of AgCl with

A g N O_{3}

. The molar conductance of the compound corresponds to two ions. The structural formula of the compound is:

$[C r (H_{2} O)_{4} C l_{3}]$
$[C r (H_{2} O)_{3} C l_{3}] H_{2} O$
$[C r (H_{2} O)_{4} C l_{2}] C l$
$[C r (H_{2} O)_{4} C l] C l_{2}$

View Solution

Q. The

H F_{2}^{-}

ion exists in the solid state and also in liquid HF solution but not in dilute aqueous solution because:

$H_{3} O^{+} a n d F^{-}$ are much more likely to be formed in an aqueous solution
HF is weaker acid than $H_{2} O$
HF has H - bonding
None of these

View Solution

Q. Assertion :

C u^{+}

ion is unstable in aqueous solution, whereas

F e^{2 +}

ion is stable. Reason:

C u^{+}

disproportionate in aqueous solution.

Read the above assertion and reason and choose the correct option regarding it.

Statement -1 is true, statement-2 is true; statement-2 is a correct explanation for statement-1
Statement -1 is true, statement -2 is true; statement-2 is NOT a correct explanation for statement-1
Statement-1 is true, statement -2 is false
Statement -1 is false, statement -2 is true

View Solution

Q. Assertion :

C u^{+}

ion is unstable in aqueous solution, whereas

F e^{2 +}

ion is stable. Reason:

C u^{+}

disproportionate in aqueous solution.

Statement -1 is true, statement-2 is true; statement-2 is a correct explanation for statement-1
Statement -1 is true, statement -2 is true; statement-2 is NOT a correct explanation for statement-1
Statement-1 is true, statement -2 is false
Statement -1 is false, statement -2 is true

View Solution

Q. How many ions per mole of the following complexes are present in their solution?

C u_{2} [F e (C N)_{6}]

View Solution

Q. The formula of the complex compound is :

$[C r C l (N O_{2}) (N H_{3})_{4}] N H_{3} \cdot C l$
$[C r (N O_{2}) (N H_{3})_{5}] C l_{2}$
$[C r C l (N H_{3})_{5}] C l \cdot N O_{2}$
$[C r (N H_{3})_{5}] N O_{2} \cdot C l_{2}$

View Solution