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4. Which of the two structures (a) and (b) given below is more stabilised by resonance? Explain.a) CH3COOH b) (CH3COO)–

What kind of forces exists between adsorbate and adsorbent in chemical adsorption?

Average binding energy per nucleon over a wide range is

Which of the following orders is correct regarding the −I effects of the substituents?

Bond order is depended on bond multiplicity as it refers to no of bonds present between the atoms of a molecule, right? We can say they are synonymous to each other?

Chemical bonding of HNO3

Oxides of non metals react with water to give

11.37 Elements of group 14(a) exhibit oxidation state of +4 only(b) exhibit oxidation state of +2 and(q)(c) form M2 and M4+ ions+4(d) form M2+ and M4+ ions

The enol from of acetone after treatment with D2O gives:

The correct order spin-only magnetic moments of the following complexes is: (I) [Cr(H2O)6]Br2 (II) Na4[Fe(CN)6] (III) Na3[Fe(C2O4)3](Δ0&gt;P) (IV) (Et4N)2[CoCl4]

The molecular weight of oxygen is 16 and molecular number is 8. How many parts of gram are there in 2 moles of oxygen?

11. What is the major product when 2-methylbutane under goes chlorination?

A complex is represented as CoCl3.xNH3 . Freezing point of its 0.1 molal solution is -0.558. Kf=1.86. Assuming 100% dissociation and coordination number of Co(lll) is six then what is the complex?

If the count of no. of protons is equal to Atomic number, no. of protons, no. of neutrons, no.of electrons in Sodium, Magnesium are?

Rank the following alkenes in order of decreasing heats of hydrogenation: (largest first)

How 4-cyano-3,5-dinitroaniline is better acid than 3,4,5-trinitrioaniline.

32. Two hybrid orbitals have a bond angle of 120^° . the percentage of p character in the hybrid orbital is nearly

Pleae explain the concept of selective precipitation in detail

13. The geometry possessed by [Ni(CO)4] is 1)tetrahedral 2)square planar 3)linear 4)octahedral

If in the given reaction, 3I_2 + OH^- → IO_3^-+ 5I^- ,2 moles of iodine are taken, then the ratio of iodate and iodide ions formed in the alkaline medium is

Calculate the effective atomic number of copper in [Cu(NH3)4]2+

How many effective Na+and Clions are present respectively in a unit cell of NaCl solid (Rock salt structure). If ions along one of the line connecting opposite face centres are absent ? n nt(a) 7/2,7/2 n nt(b)4,7/2 n nt(c) 3,3 n nt(d) 7/2,4 n nt

Alcoholic solution of KOH is used for:

In a first order reaction the concentration of reactant decreases from 0.6 M to 0.3 M in 30 min. The time taken for the concentration to change from 0.1 M to 0.025 M:

40 For a solution if PA= 600mm HG PB=840mm hg under atmospheric conditions and vapour pressure of solution is 1atm then find (i) composition of solution (ii) composition of vapour in equilibrium with solution

8 g mol of PCl5 is heated in a closed vessel of 10 L capacity and 25% of it dissociates into PCl3 and Cl2 at the equilibrium, then value of Kp will be equal to:

Both gout and kidney stone formation is caused by:

31.How many isomers are possible for a Ma2b2c2 compound??

what is the hybridisation state of B and N in inorganic benezene respectively?

Consider the composite system, which is held at 300 K, shown in the following figure. Assuming ideal gas behavior, calculate the total pressure (in atm) if the barriers separating the compartments are removed. Assume that the volume of the barriers is negligible. (Given: R=0.082 atm L/mol.K)

How are essential oils purified?

Estimate how many visible light photons a 120 W light bulb emits per second. Assume the bulb has an efficiency of about 5%.(λ=500 nm ,h=6.63×10−34 Joule-sec)

Naming of ligand in [M(en)2]n+ start with

A balloon has a volume of 2.27 L at 1 bar external pressure. It is known that it bursts when the pressure (external) reaches 0.2 bar. What would be the volume at which it bursts? Assume that a finite number of moles occupy the balloon and that the temperature remains constant.

39. Product obtained on polymerisation of styrene and acrylonitrile

How many moles of lead (I) chloride will be formedfrom a reaction between 6.5g of PbO and 3.2 g ofHCI?0.029(3) 0.333AIPMT (Prélms)-2008\rbrack(2) 0.044(4) 0.011

On what basis is the least count of instruments formulated, kindly offer a derivation of least count of vernier callipers . And why is least count formula different for different instruments?

hooks law with proof explain and Proof Of Bernoulli theorem explain

In which of the following reaction hydrogen peroxide is a reducing agent?

Enthalpy of formation of C3H8, CO2, H2O is 104,-394,286kj/mol.Calculate the enthalpy of combustion of 66g of propane

C3H8O represents two alcohols - Propan-1-ol and Propan-2-ol is a type of:

group have the maximum leaving ability amongst the given groups in the nucleophilic substitution reactions.

23. The Mass of NaCl added in 100ml of 0.1M Ch3cooh in order to double its elevation in boiling point is( degree of dissociation of Ch3cooh in solution is 0.5)

For the following reaction scheme, percentage yields are given along the arrow:x g and y g are the mass of R and U, respectively. (Use : Molar mass (in g mol−1) of H, C and O as 1, 12 and 16, respectively)The value of x is:

The correct order of electron gain enthalpy (from most to least endothermic) is:

How many unit cells are present in a cube shaped ideal crystal if NaCl if mass 1.00 g?

Experimentally it was found that a metal oxide has formula M0.98O. Metal M, is present as M2+ and M3+ in its oxide. Fraction of the metal which exists as M3+ would be:

radiusWhat is the value of electron gain enthalpy of Na ifIE, of Na 5.1 eV?(1) +2.55 eV(3) -5.1 eV\lbrack AIPMT (Mains) -2011\rbrack(2) +10.2 eV(4) -10.2 eVt ordor.

An element X has an electronic configuration of 2, 8, 18, 8, 1. In this case, X will be ___ .

73. Dipole moment of 123-trichlorocyclopropane will be zero or not

The correct order spin-only magnetic moments of the following complexes is: (I) [Cr(H2O)6]Br2 (II) Na4[Fe(CN)6] (III) Na3[Fe(C2O4)3](Δ0>P) (IV) (Et4N)2[CoCl4]