MCQ
The element which liberates oxygen gas from water is
  • A
    $P$
  • B
    $Na$
  • $F$
  • D
    $I$

Answer

Correct option: C.
$F$
c
(c)$2{H_2}O + 2{F_2}\, \to \,4HF + {O_2}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Which of the following $2-$ halo nitrobenzene is most reactive towards  nucleophilic aromatic substitution ?
$EMF$ of following concentration cell will be ............. $\mathrm{V}$

 ${\text{C}}{{\text{l}}_2}\,{\text{(1}}\,{\text{atm) |}}\,{\text{C}}{{\text{l}}^ - }\,{\text{(1}}\,\,{\text{M)}}\,{\text{|| C}}{{\text{l}}^ - }\,(0.1\,M)\,|\,C{l_2}\,(2\,atm)$

The electrochemical equivalent of magnesium is $0.126\,mg/C$. A current of $5\, A$ is passed in a suitable solution for $1$ hour. The mass of magnesium deposited will be ........... $\mathrm{gm}$
Which of the following intermediate is more stable
Freon (dichlorodifluoro methane) is used
The following mechanism has been proposed for the reaction of $NO$ with $Br_2$ to form $NOBr$ :

$NO(g) + Br_2 (g) \rightleftharpoons NOBr_2 (g)$

$NOBr_2(g)+ NO(g) \longrightarrow 2NOBr(g)$

If the second step is the rate determining step, the order of the reaction with respect to $NO(g)$ is

Approximate $pH$ of $0.01\,\,M\,NaHA$  is calculated by $: ({K_{{a_1}}}\, = \,{10^{ - 6}}$ and ${K_{{a_2}}}\, = \,{10^{ - 8}}$ are ionization constant of $H_2A$ )
Given below are two statements:

Statement $(I)$ : The $\mathrm{NH}_2$ group in Aniline is ortho and para directing and a powerful activating group.

Statement $(II)$ : Aniline does not undergo FriedelCraft's reaction (alkylation and acylation).

In the light of the above statements, choose the most appropriate answer from the options given below :

The main product of following reaction will be
The $IUPAC$ name of the compound $C{H_3} - \mathop {\mathop {CH}\limits_{|\,\,\,\,} }\limits_{C{H_3}} - C{H_2} - C{H_2} - OH$ is