Structure of a mixed oxide is cubic close-packed(c.c.p) The cubic unit cell of mixed oxide is composed of oxide ions.One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are occupied by a monovalent metal B.The formula of the oxide is:

Solution A contains 7 g/L MgCI₂ and solution B contains 7 g/L of NaCI. At room temperature, the osmotic pressure of

In the lead-acid battery during charging, the cathode reaction is

According to Maxwell Boltzmann distribution of energy, ....... .

Which of the following result the chemist must have observed about his studies with KCI solution ?

The function of potassium ethyl xanthate in froth floatation process is to make the ore

Halogens combine with each other to form interhalogen compounds (XX', XX'_3, XX'₅ and XX^'₇).  Halide ions often react with molecules of halogens or interhalogens to form polyhalide ions consisting either of the same halogen or of two or three different halogens.  Besides these, a few other anions are known, which do not contain any of the halogen atoms but behave like halide ions.  These anions are called pseudohalides and consist of two or more atoms of which one is always a nitrogen atom.
Which one of the following is not a pseudohalide?

Which element do you expect to have the smallest atomic radius ?

Which one of the following ligand is caple of forming a low spin as well as a high spin complex?

The case of dehydrohalogenation of alkyl halides with alcholic KOH is 

Phenol reacts with bromine in CS₂ to give

The smallest ketone and its next homologue are reacted with NH₂OH to form oxime

What reagent is used in Hinsberge test of amines?

Which of the following statements is correct ?

The polymer used in the squeeze bottles is

Artificial sweetener which is stable under cold conditions only is

Glass is considered as a supercooled liquid. Give reason.

Given below is the sketch of a plant carrying out a process.

(i) Name the process occurring in the above plant.
(ii) To which container does the net flow of solvent take place ?
(iii) Name one SPM which can be used in this plant.
(iv) Give one practical use of the plant.

In each of the following pairs, which will allow greater conduction of electricity and why ?
(a) Silver wire at 20°C, Same silver wire at 50°C
(b) NaCl solution at 20°C, Same NaCl solution at 50°C
(c) NH₄ OH solution at 20°C, Same NH₄ OH solution at 50°C
(d) 0.1 M acetic acid solution, 1 M acetic acid solution.

The reaction 2H₂(g) + O₂(g) \(\longrightarrow\)2H₂O(g) is feasible. How is that hydrogen and oxygen mixture allowed to stand at room temperature shows no formation of water at all ?

Give four examples of heterogeneous catalysis.

Draw labelled diagram of electrolytic cell used for electrolysis of alumina.Write the chemical equations occurring in it.

Why is H₂O a liquid and H₂S a gas?

Which out of \(Lu(OH_{ 3 })\) and \(La(OH)_{ 3 }\) is more basic and why?

Write the name, state of hybridization, shape and magnetic behaviour of the following complexes :
[CoCl₄]^2-,[Ni(CN)₄]^2-,[Cr(H₂O)₂(C₂O₄)₂]^-
(At. nos. : Co = 27, Ni = 28, Cr = 24)

Arrange the following compounds in order of increasing reactivity towards nucleophilic substution reactions :

(i)2, 4 - Dinitrochlorobenzene

(ii)Chlorobenzene

(iii)2, 4, 6 -  Trinitrochlorobenzene

(iv) 4-Nitrochlorobenzene

Give reasons.

The carbon-oxygen bond in phenol is slightly shorter than that in methanol. Why?

An organic compound (A) with molecular formula, C₈H₈O forms an orange-red precipitate with 2, 4-DNP reagent and gives yellow precipitate on heating with iodine in the presence of sodium hydroxide. It neither reduces Tollens' or Fehling's reagent, nor does it decolourise bromine water or Baeyer's reagent. On drastic oxidation with chromic acid, it gives a carboxylic acid (B) having molecular formula, C₇H₆O₂. Identify the compounds (A) and (B) and explain the reactions involved.

Write chemical reaction of aniline with benzoyl chloride and write the name of the product abtained.

Amino acids can be classified as \(\alpha -, \beta -, \gamma-, \) \(\delta -\) and so on depending upon the relative position of amino group with respect to carboxyl group. Which type of amino acids form polypeptide chain in proteins ?

An element 'A' (atomic mas 100) having bcc structure has unit cell edge 400 pm. Calculate the density of 'A' and the number of unit cells for 10 g of 'A'. [N_A=6.023 10²³]

Calculate the molarity of pure water (density of water \(=1\quad g\quad mL^{ -1 }\)).

If the molar conductivities at infinite dilution at infinite dilutiuon at 293 K for aqueous hydrocloric acid,sodium acetate and sodium chloride are 383.5, 78.4 and 102.0 S Cm² respectively, calculate the molar mass conductivity of acetic acid at this temperature and dilution. If the molar conductivity of acetic acid at some other dilution is 100.0 S cm² at 293 K, Calculate the degree of ionization of acetic acid at some otherdilution is 100.0 S cm² at 293K, calculate the degree of ionization of acetic acid at this dilution.

Following data are obtained for the reaction:
N₂O₅ ⟶ 2NO₂+1/2O₂

Show that it follows first order reaction.
(b) Calculate the half-life. (Given: log 2= 0.3010 ,log 4= 0.6021)

Differentiate among a homogeneous solution, a suspension and a colloidal solution, give a suitable example of each.

State the role of 
(i) depressant in froth floatation process.
(ii) silica in the metallurgy of copper.
(iii) graphite rod in the electrolytic reduction of alumina.

(a) Draw the structures of the following:
(i) XeF₂ (ii) BrF₃
(b) Write the structural difference between white phosphorus and red phosphorus.

Identify the first row transition metal ions which have outer electronic configurations of 3d⁴ and 3d⁶ and describe their oxidation states. 

Write the structures of the main products of following reactions:

(a) Write structures of different isomeric amines corresponding to the molecular formula, C₄H₁₁N.
(b) Write IUPAC names of all the isomers.
(c) What type of isomerism is exhibited by different pairs of amines?

Compounds having general molecular formula  \(AFe_{ 2 }O_{ 4 }\) are called ferrites and posses spinel type structures. Some common examples are \(MgFe_{ 2 }O_{ 4 }\)  and \(ZnFe_{ 2 }O_{ 4 }\) They may be thought of being formed by replacing \(Fe^{ 2+ }\) ions present in \(Fe_{ 3 }O_{ 4 }\) by bivalent cations such as \(Mg^{ 2+ },Zn^{ 2+ }\) ions etc. Now answer the following questions :
(i) What types of materials are ferrites?
(ii) What are the main uses of ferrites?

State and explain Faraday's law of electrolysis. What is electrochemical equivalent ?

In the following figure, orientations of reaction molecules are shown. Explain the influence of orientation of molecules in a chemical reaction?

A house wife while working in the kitchen gots a cut on the finger. It started bleeding and become panicked. She immediately called her neighbour.She had kept ferric chloride in her house. She immediately applied it on the affected area and the bleeding stopped.
(i) What is the chemical formula of ferric chloride?
(ii) Why did bleeding stop on applying it on the affected finger?
(iii) What is the name of the phenomenon involved?
(iv) What do we learn from it? What is the value associated with this from the point of view of chemist?

While washing a miner's overalls, a washerwoman noticed that sand and similar dirt fell to the bottom of the washtub. What was peculiar, the copper-bearing compounds that had come to the clothes from the mines were caught in the soaplids and so they came to the top. One of her clients was a chemist, Mrs. Malik. The washerwoman told her experience to Mrs. Malik. The latter thought that the idea could be used for separating copper compounds from rocky and earth materials on a large scale. After reading the above passage answer the following questions-
What type of ores are concentrated by this process?

(a) Draw the structure of:
(i) BrF₃ (ii) XeOF₄
(b) Explain giving reason in each case:
(i) Why H2Teis more acidic than H₂ S?
(ii) Why are halogens strong oxidising agents?
(iii)Why does nitrogen show catenation tendency less than phosphorus?

(i) With reference to structural variability and chemical reactivity, write the differences between lanthanoids and actinoids.
(ii) Name a member of the lanthanoid series which is well known to exhibit +4 oxidation state.
(iii) Complete the following equation:
\(MnO_{ 4 }^{ - }8H^{ + }5e^{ - }\longrightarrow \) 
(iv) Out of \(Mn^{ 3+ }\) and \(Cr^{ 3+ }\) , which is more paramagnetic and why?
(Atomic nos.: Mn = 25, Cr = 24)

What is the relationship between observed colour of the complex and the wavelength of light absorbed by the complex ?

Wurtz reaction falils in case of tert-alkyl halides. Explain.

How is phenol obtained from;

(i)benzenesulphonic acid and

(ii)benzenediazonium chloride.How can it be converted into;

(i)aspirin (ii)phenyl salicylate (iii)p-hydroxyazobenzene and (iv)phenyl benzoate?

(a) Write the structures of A and B in the following reactions:
(i) \({ CH }_{ 3 }COCI\overset { { H }_{ 2 },Pd-BaSO_{ 4 } }{ \longrightarrow } A\overset { { H }_{ 2 }N-OH }{ \longrightarrow } B\)
(ii) \({ CH }_{ 3 }MgBr\overset { 1.CO_{ 2 } }{ \underset { 2.H_{ 3 }O^{ + } }{ \longrightarrow } } A\overset { PCI_{ 5 } }{ \longrightarrow } B\)
(b) Distinguish between:
(i) C₆H₅- COCH₃ and C6HS- CHO
(ii) CH₃COOH and HCOOH.
(c) Arrange the following in the increasing order of their boiling points :
CH₃CHO, CH₃COOH, CH₃CH₂OH.
                                       (OR)
(a) Write the chemical reaction involved in Wolff-Kiphner reduction
(b) Arrange the following in the increasing order of-their reactivity towards nucleophilic addition reaction
C₆H₅COCH₃ , CH₃ - CHO, CH₃COCH₃
(c) Why carboxylic acid does not give reactions of carbonyl group?
(d) Write the product in the following reaction
\({ CH }_{ 3 }{ CH }_{ 2 }CH=CH-{ CH }_{ 2 }CN\overset { 1.(i-Bu)_{ 2 }AIH }{ \underset { 2.H_{ 2 }O }{ \longrightarrow } } ?\)
(e) A and Bare two functional isomers of compound C₃H₆0. On heating with NaOH and I₂ isomer Bforms yellow precipitate of iodoform whereas isomer A does not form any precipitate. Write the formulae of A and B.

(a) Write the structures of main products when products when benzene diazonium chloride reacts with the following reagents:
(i) H₃PO₂+H₂O
(ii) CuCN/KCN
(iii) H₂O
(b) Arrange the following in the increasing order of their basic character in an aqueous solution:
C₂H₅NH₂ , (C₂H₅)₂NH, (C₂H₅)₃N
(c) Give a simple chemical test to distinguish between the following pair of compounds:
C₆H₅-NH₂ and C₆H₅-NH-CH₃

Glucose and fructose give the same osazone ? Explain.

What are chain transfer agents?Giving a suitable example,explain the overall effect of these agents on the process of vinyl polymerization.

Due to hectic and busy schedule, Mr. Singh started taking junk food in the lunch break and slowly became habitual of eating food irregularly to excel in his field. One day during meeting he felt severe chest pain and fell down. Mr. Khanna, a close friend of Mr. Singh took him to doctor immediately. The doctor diagnosed that Mr. Singh was suffering from acidity and prescribed some medicines. Mr. Khanna advised him to eat home made food and change his lifestyle by doing yoga, meditation and some physical exercise. Mr. Singh followed his friend's advice and after few days he started feeling bener.
After reading the above passage, answer the following:
(i) What are the values (at least two) displayed by Mr. Khanna?
(ii)What are antacids? Give one example.
(iiii)Would it be advisable to take antacids for a long period of time? Give reason