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Chapters
2: Solutions
3: Ionic Equilibria
4: Chemical Thermodynamics
5: Electrochemistry
6: Chemical Kinetics
▶ 7: Elements of Groups 16, 17 and 18
8: Transition and Inner transition Elements
9: Coordination Compounds
10: Halogen Derivatives
11: Alcohols, Phenols and Ethers
12: Aldehydes, Ketones and Carboxylic acids
13: Amines
14: Biomolecules
15: Introduction to Polymer Chemistry
16: Green Chemistry and Nanochemistry
![SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC chapter 7 - Elements of Groups 16, 17 and 18 - Shaalaa.com](/images/chemistry-english-12-standard-hsc_6:5f2b1b2038084cf381bfa42c826a928c.jpg "SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC chapter 7 - Elements of Groups 16, 17 and 18")
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Solutions for Chapter 7: Elements of Groups 16, 17 and 18
Below listed, you can find solutions for Chapter 7 of Maharashtra State Board SCERT Maharashtra for Chemistry [English] 12 Standard HSC.
SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC 7 Elements of Groups 16, 17 and 18 Multiple Choice Questions
1 Mark
In chlorous acid, oxidation state of chlorine is _______.
+2
+4
+3
+7
Acidic strength of halogen acids increases in the order of _______.
HF > HCl > HBr > HI
HCl > HF > HBr > HI
HBr > HCl > HF > HI
HI > HBr > HCl > HF
Sulfur dioxide reacts with sodium hydroxide solution to form _______.
sodium sulfite
sodium sulfate
sodium hydrogen sulfite
sodium hydrogen sulfate
The gas evolved when sulfuric acid reacts with copper metal _______.
sulfur dioxide
sulfur trioxide
nitrogen dioxide
nitrogen trioxide
Hot and concentrated alkali NaOH reacts with chlorine to form _______.
only chlorate
only hypochlorite
chloride and chlorate
chloride and hypochlorite
When SO2 is passed through an aqueous solution of I2, the solution becomes _______.
ruby red
colourless
violet
yellowish green
O2 molecule is ______.
ferromagnetic
diamagnetic
paramagnetic
ferrimagnetic
The number of covalent bonds present in sulfuric acid:
4
6
8
2
In interhalogen compounds, which of the following halogens is never the central atom?
I
Cl
Br
F
SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC 7 Elements of Groups 16, 17 and 18 Very short answer questions
1 Mark
What is the O−S−O bond angle in SO2?
Complete the following reaction:
\[\ce{SO_{2(g)} + Cl_{2(g)} ->[Charcoal]}\] ?
Name the solution which is formed by passing sulfur dioxide in water.
Write chemical formula of galena.
Why oxygen cannot exhibit a higher oxidation state?
The number of lone pairs of electrons present in ClF5:
Write the order of ionic character of halides with monovalent metal (M).
SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC 7 Elements of Groups 16, 17 and 18 Short answer questions (Type- I)
2 Marks
Draw structure and name the shape of bromine trifluoride.
Write any two uses of Chlorine.
Write a balanced chemical reaction of sulfuric acid with carbon.
Write a balanced chemical reaction of sulfuric acid with sulfur.
Draw resonance hybrid structure of SO2 in two canonical forms.
What is the action of chlorine on cold and dilute sodium hydroxide.
What is the action of chlorine on hot and concentrated sodium hydroxide?
Elements of group 16 have lower ionization enthalpy values compared to those of group 15 elements. Explain why?
SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC 7 Elements of Groups 16, 17 and 18 Short Answer Questions (Type-II)
3 Marks
What is the oxidation state of sulfur in the following?
Sulfurous acid
What is oxidation state of sulfur in the following?
Sulfuric acid
What is oxidation state of sulfur in the following?
Peroxymonosulfuric acid
Fluorine shows only –1 oxidation state while other halogens show –1, +1, +3, +5 and +7 oxidation states. Explain.
Write the chemical reaction of action of Cl2 on excess NH3.
Answer the following.
Distinguish between rhombic sulfur and monoclinic sulfur.
Explain the trend in following atomic properties of group 16 elements:
Atomic radii
Explain the trend in following atomic properties of group 16 elements:
Electronegativity
Explain the trend in the following atomic properties of group 16 elements:
Electron gain enthalpy
What are chalcogens?
Discuss industrial method of preparation of sulfur dioxide from zinc sulfide and iron pyrites.
Write three physical properties of sulfuric acid.
Write three uses of sulfuric acid.
SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC 7 Elements of Groups 16, 17 and 18 Long answer questions
4 Marks
Describe the manufacturing of H2SO4 by the contact process.
What happens when chlorine reacts with?
Al
What happens when chlorine reacts with?
Na
What happens when chlorine reacts with?
S8
What happens when chlorine reacts with?
P4
Draw the structure of chloric acid.
Draw structure of chlorous acid.
Discuss four points of anomalous behavior of fluorine.
Solutions for 7: Elements of Groups 16, 17 and 18
SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC chapter 7 - Elements of Groups 16, 17 and 18
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Concepts covered in Chemistry [English] 12 Standard HSC chapter 7 Elements of Groups 16, 17 and 18 are Occurrence of Elements of Groups 16, 17 and 18, Electronic Configuration of Elements of Group 16, 17 and 18, Atomic and Physical Properties of Elements of Group 16, 17 and 18, Anomalous Behaviour of Oxygen, Anomalous Behaviour of Fluorine, Chemical Properties of Elements of Groups 16, 17 and 18, Oxoacids, Oxygen and Compounds of Oxygen, Chlorine, Concept of Group 18 Elements.
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