When fluorine reacts with cold and dil. NaOH the products obtained are:

Q. When $F_2$ reacts with hot and concentrated alkali, then which of the following will be obtained?
(i) $O{F}_2$
(ii) $O_2$
(iii) $H_{2}O$
(iv) $NaF$

Q. The enthalpy of the reaction is maximum in which of the following reaction ?
1) NaOH +HBr ------>NaBr+h2o
2)NaOH+HF--------->NaF +h2O

Q. $HF\left(aq\right)+NaOH\to NaF\left(aq\right)+H_{2}O\left(l\right)\Delta H=-68.6kJ/mol$ The high negative value of heat of reaction is due to:

Q. When iodine reacts with $\text{NaF,}\text{NaBr}\text{and}\text{NaCl}$