Which compound decolorizes iodine solution?
- $H _{2} SO _{4}$
- $N a_{2} S$
- $Na _{2} SO _{4}$
- $Na _{2} S _{2} O _{3}$
The Correct Option is D
Solution and Explanation
Top Questions on Group 17 Elements
- Identify the pseudohalogen from the following ions :
- CUET (UG) - 2023
- Chemistry
- Group 17 Elements
- The standard free energy change \((ΔG°)\) for \(50%\) dissociation of \(N_2O_4\) into \(NO_2\) at \(27°C\) and 1 atm pressure is \(x\ J mol^{–1}\). The value of \(x\) is _____. (Nearest Integer)
[Given : \(R = 8.31\ JK^{–1} mol^{–1}\), \(log\ 1.33 = 0.1239\), \(ln\ 10 = 2.3\)]- JEE Main - 2022
- Chemistry
- Group 17 Elements
- The correct order of bond dissociation enthalpy of halogens is :
- JEE Main - 2021
- Chemistry
- Group 17 Elements
- Atomic number of an element is 17 then the period to which this element belongs
- TS POLYCET - 2021
- Chemistry
- Group 17 Elements
- The major product of the following reaction is:
- NEET (UG) - 2019
- Chemistry
- Group 17 Elements
Questions Asked in Rajasthan PMT exam
- 300 cal of heat is supplied to raise the temperature of 50 g of air from $ 20{}^\circ C $ to $ 30{}^\circ C $ without any change in its volume. Change in internal energy per gram of air is
- Rajasthan PMT - 2011
- internal energy
- The velocity of water flowing in a non-uniform tube is 20 cm/s at a point where the tube radius is 0.2 cm. The velocity at another point, where the radius is 0.1 cm, is
- Rajasthan PMT - 2011
- mechanical properties of fluid
- Block A of mass 4 kg and block B of mass 6 kg are resting on a horizontal surface as shown in the figure. There is no friction between the block B and the horizontal surface. The coefficient of friction between the blocks is 0.2. If the value of $ g=10\,m/{{s}^{2}}, $ the maximum horizontal force F that can be applied on block B without any relative motion between A and B is
- The excess pressure inside a soap bubble A is twice that in another soap bubble B. The ratio of volumes of A and B is
- Rajasthan PMT - 2011
- Surface tension
- The unit of surface tension is
- Rajasthan PMT - 2011
- Surface tension
Concepts Used:
Group 17 Elements
Halogens are the group 17 elements of the periodic table. The term ‘halogen’ means ‘salt-producing’, hence the name halogens as they possess the tendency to form salts after reacting to metals. It generally has five elements:
- Fluorine (F)
- Chlorine (Cl)
- Bromine (Br)
- Iodine (I)
- Astatine (At)
These are all naturally occurring halogens but Tennessine (Ts) is an artificially created halogen.
Halogens:
Halogens are highly reactive elements and are highly electronegative. They have a high tendency to react with metals to form salts. They are also known as Group 17 elements. They have 7 electrons in their outer shell with a configuration of (ns2 np5). Fluorine being the first halogen in group 17, is highly reactive. Astatine is a halogen because of its resemblance with iodine despite it being radioactive.
Electronic Configuration:
The general electronic configuration for group 17 elements is ns2np5. This configuration clearly shows that they have 7 electrons in their valence shell. They require one more electron to complete their octet and achieve noble gas configuration.
