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Important Questions, Chapter 4, 2nd Year Chemistry, FSc


All important short and long questions from the Chapter 4, 2nd Year Chemistry, FSc. That helps you to get good marks in board exams.

This chapter is important as short-wise. So most important short questions are separated from his chapter for you ease. Read them carefully and also tell friends to spread Ilm Gah Pakistan. Thanks

Short Questions

Q.1 Aqua regia dissolves gold and platinum. Why?

Q.2 Nitrous acid decolourises acidified KMnO4 and bromine water. Give reactions.

Q.3 What is ring test?

Q.4 Give two reactions in which H2SO4 acts as an oxidizing agent.

Q.5 Give two reactions for the preparation of phosphorus acid (H3PO3).

Q.6 Give four points of similarity of Oxygen and Sulphur.

Q.7 What is Aqua regia and how it dissolves noble metals?

Q.8 Name two allotropic forms of sulphur.

Q.9 Write down structure of N2O and NO2,

Q.10 Why is SO3 dissolved in H2SO4 and not in water?

Q.11 Complete the following reactions
 i) HNO3 + H2S --------->
ii) HNO3 + HI --------->

Q.12 Write the four applications of H2SO4.

Q.13 Write the chemical reactions which take place in contact chamber.

Q.14 How does HNO2 acts as reducing agent?

Q.15 How does P2O3 react with water in the cold and hot state?

Q.16 Prove that P2O5 is the dehydrating reagent.

Q.17 Write two reactions which show that H2SO4 acts as a dehydrating agent.

Q.18 Write four uses of HNO3.

Q.19 How does nitrogen differ from other elements of its group? Four points?

Q.20 Why is dinitrogen oxide called "Laughing Gas"?

Q.21 What happens when NO2 is dissolved in water?

Q.22 NO2 is strong oxidizing agent prove by giving examples?

Q.23 Write balanced equations for the reactions of HNO2 with 
 a) HI          b) CO(NH2)2

Q.24Give four points of dissimilarities of oxygen and sulphur.

Q.25 Why phosphorus forms PCl3 and PCl5?

Q.26 What happens when dinitrogen tetraoxide is heated?

Q.27 Give the definition of allotropy. Write allotropes of Phosphorus.

Q.28 How is H3PO4 prepared on a large scale?



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Ilm Gah: Important Questions, Chapter 4, 2nd Year Chemistry, FSc
Important Questions, Chapter 4, 2nd Year Chemistry, FSc
All important short and long questions from the Chapter 4, 2nd Year Chemistry, FSc. That helps you to get good marks in board exams.
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