Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Chemistry Expert

Q1 a) Name the scientists who got Chemistry Nobel prize in 1906 and 1911.

b) Describe Hund’s rule briefly with appropriate ex.

c) prepare down main features of Mendeleev’s periodic table.

d) What are the factors that affect the ionization energy?

e) Define the following terms

i) Electron affinity

ii) Electronegativity

iii) Van der Waals radius

problem2a) What is the difference between intramolecular and intermolecular hydrogen bonding? Describe with appropriate exs.

b) What are ortho and para forms of hydrogen? Discuss the effect of temperature on ortho and para hydrogens?

c) Describe the following:

i) The alkai metals do not occur in the free state in nature.

ii) The alkali metals are the largest in their corresponding period.

iii) The alkali metals act as strong reducing agent.

d) Discuss briefly anomalous nature of lithium.

problem3)a) Describe the following

i) The alkaline earth metals are soft metals.

ii) The alkaline earth metals are less reactive than alkali metals.

iii) The halides of beryllium polymerise easily.

b) Briefly discuss the complexation behaviour of alkaline earth metals.

c) Why aluminum can not be extracted from aqueous solution of aluminum salts by the process of electrolysis?

d) Why does hot and conc. HNO3 render Al and Ga passive?

e) Why are the borohydrides more stable than boranes?

Q.4 a) What are metaborates? Give reaction for the borax-bead test for cobalt and the colour obtained thereof.

b) B-N bond distance in borazine is 144 pm, which is less than the sum of single-bond covalent radii of B (82 pm) and N (70 pm). What does this indicate?

c) The inert nature of silicones make them useful for what?

d) What is the structure of most acetylides?

e) Give the reaction of phosphorus with potassium hydroxide.

problem5)a) How is red lead formed from lead oxide? Give the appropriate reactions. What are the uses of red lead?

b) Give appropriate reactions to describe why pale blue liquid of N2O3 loses its colour on warming?

c) Hypophosphorous acid is monobasic even though it has three hydrogen atoms. Why?

d) Give one very significant use of hydrazine.

e) What is phosphatic slag?

problem6)a) Describe the paramagnetic behaviour of oxygen on the basis of molecular orbital theory. Give reasons for a large difference in melting and boiling points between oxygen and sulphur.

b) How is peroxomonosulphuric acid prepared from peroxodisulphuric acid and how could two be distinguished from each other? Illustrate with the help of complete reactions.

problem7)a) Enumerate the reasons of delay in the isolation of fluorine. Why is fluorine unable to exhibit positive oxidation states? Describe the strongest ability of this element with the help of Born Haber cycle.

b) Acid strength of oxoacids of halogens increases with increase in the oxidation number of halogen, describe.

c) The interhalogen, ICl3has a T-shaped structure, describe.

problem8)a) How is the ionisation energy, melting point and boiling point of noble gases affected by their electronic configuration?

b) Describe the structure of XeOF4 on the basis of VSEPR theory

c) Why do the transition metals exhibit variable oxidation states? How does the stability of oxidation states of transition metals differ across a series and down the group?

problem9)a) Properties of transition metals vary from one element to another, whereas the lanthanide elements resemble one another more close ly and occur together in nature, describe.

b) Why is the range of oxidation states much more restricted in the lanthanide series as compared to the early actinides, describe.

problem10)a) What are the major assumptions of crystal field theory? How does it describe the colours of transition metal complexes?

b) Carbon is theoretically capable of reducing almost all metal oxides at high temperatures, still some metals could not be obtained by reduction of their oxides with carbon, describe.

Chemistry, Academics

  • Category:- Chemistry
  • Reference No.:- M92880
  • Price:- $70

Priced at Now at $70, Verified Solution

Have any Question? 


Related Questions in Chemistry

The elements of 3d transition series are given assc ti v cr

the elements of 3d transition series are given as:sc, ti, v, cr, Mn, fe, Coanswer the following: (a) write the element which shows max. no. of oxidation states.why? (b)which element has highest M.P (c) which elements is ...

Balance the molecular equation for the following redox

Balance the molecular equation for the following redox reaction. What is the sum of the coefficients? Don't forget coefficients of one. Use the smallest whole number coefficients possible. H 2 SO 4 (aq) + HI(aq)I 2 (s) + ...

If it is considered that drinking 800 ml of water per day

If it is considered that drinking 800 mL of water per day containing an arsenic concentration equal to the US EPA maximum contaminant level (MCL), delivers the dose to an adult that corresponds to a 1 in 10,000 excess ri ...

What are the major sources and emissions of air pollution

What are the major sources and emissions of air pollution in your community? What chemicals are they emitting, and how are these chemicals transported through your community (non-point sources, smokestacks, etc.)? Were y ...

Explain why acidic rain produced as a result of excess

Explain why acidic rain produced as a result of excess sulphur dioxide in the atmosphere can cause degradation of buidings.

Explain how bacteria are intimately involved in the

Explain how bacteria are intimately involved in the generation of acidic mine waters

Pyridine c5h5n is a weak base pkb 874 with an unpleasant

Pyridine (C5H5N) is a weak base (pkb = 8.74) with an unpleasant, sweet fishy odour. In a titration, 175.0mL of pyridine solution required 13.6 mL of 0.3250M HCl to reach the equivalence point. a) Calculate the pH of the ...

Assuming 100 yield what are the masses of the products that

Assuming 100% yield, what are the masses of the products that are formed by reacting 2.3g of C2H6(g) with excess O2(g) in the reaction C2H6(g) + O2(g)--->CO(g) +H2O(g).

In the reaction of meso-stilbene dibromide koh and

In the reaction of meso-stilbene dibromide, KOH and triethylene glycol and heat, if the KOH has a purity of 85% and the remainder is water; why did the mixture appear to boil?

1 show the alcohols you would obtain by reduction of the

1. Show the alcohols you would obtain by reduction of the following carbonyl compounds: (a) CH 3                   (b)          (c)  O      CH 3        |                                                         ||         ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro