Periodic Properties

Q. The correct order of bond dissociation enthalpy of halogen is:

1. $F_2>C{l}_2>B{r}_2>I_2$
2. $C{l}_2>F_2>B{r}_2>I_2$
3. $C{l}_2>B{r}_2>F_2>I_2$
4. $I_2>B{r}_2>C{l}_2>F_2$

Q.

Which of the following properties of elements - $Cl,Br,andI$ increase(s) with the increase in atomic number?

1. Enthalpy of vapourization

2. Ionic radius

3. Bond energy of the molecule $X_2$

4. Ionization energy

Q.

Which of the following is a fuming red-brown liquid at room temperature?

1. Bromine

2. Fluorine

3. Chlorine

4. Iodine

Q.

Which of the following is a pale yellow-green gas at room temperature?

1. None of the above

2. Chlorine

3. Bromine

4. Iodine

Q.

The radioactive halogen element is:

1. Iodine

2. Astatine

3. None of the above

4. Bromine

Q. Electronegativity of fluorine is greater than that of chlorine but electron affinity of chlorine is greater than that of fluorine.

1. False
2. True

Q. Which of the following represents the correct order for acidic strength:

1. $HCl{O}_4>HI{O}_4>HBr{O}_4$
2. $HCl{O}_4>HBr{O}_4>HI{O}_4$
3. $HCl{O}_4<HBr{O}_4>HI{O}_4$
4. None of these

Q. Which of the following has an incorrect order of listed properties?

1. $F_2>C{l}_2>B{r}_2>I_2$ : Bond dissociation energy
2. $F_2>C{l}_2>B{r}_2>I_2$ : Oxidising power
3. $F>Cl>Br>I$ : Electron gain enthalpy
4. $F>Cl>Br>I$ : Electronegativity

Q. Which of the following is/are true statement(s)?

1. The basic nature of $X^{-}$ is in the order $F^{-}>C{l}^{-}>B{r}^{-}>I^{-}$
2. $HI$ is the strongest acid among $HF,HCl,HBr\text{and}HI$
3. The ionic character of $M-X$ bond decreases in the order $M-F>M-Cl>M-Br>M-I$
4. Fluorine does not form any oxoacids

Q. Which among the following is the most reactive?

1. $B{r}_2$
2. $I_2$
3. $ICl$
4. $C{l}_2$