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A solution has a 1:4 Mole ratio of pentane to hexane.The vapour pressures of pure hydrocarbons at 20*c are 440 mmof Hg and 120mm of Hg for hexane.The Mole fraction of pentane in vapour pressure would be

What is equilibrium in chemical reaction and equation

16. What is producer and water gas? Explain how they made?

During separation of the components of air, the gwhich separates out first in the form of solid, is(1) Carbon dioxide(2) Argon(3) Oxygen(4) Nitrogen

In a vessel 0.2 mole of each He, N2 and O2 was present. Pinhole of vessel opened in vacuum for a short time period. What will be order of partial pressure of gases inside the vessel now?

What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?

Why, aluminum is more reactive than iron, yet there is less corrosion of aluminum when both are exposed to air?

The ionic mobility of alkali metal ions in aqueous solution is maximum for

MgCl. 8H2O is more stable or MgCl.6 H2O?

ntIN HARDYSCHULTZ rulefloccuating powerof an ion increases with why?n nt-decreasesin size /decreasesin charge/increse charge/increass sizen

Give an example for macromolecular colloid ?

A mixture of H2 and I2 in molecular proportion of 2 : 3 was heated at 440∘C till the reaction H2+I2 ⇌ 2HI reached equilibrium state. Calculate the percentage of iodine converted into HI Kcat440∘C is 0.02)

How many two centre 2 electron and 3centre 2 e bonds arr present in diborane ??

Which of the following is the correct sequence of atomic weights of the given elements ? (1) Ni>Co>Fe (2) Fe>Co>Ni (3) Co>Fe>Ni (4) Co>Ni>Fe

Rate of Reaction,is fastest when ‘Z’ is

Writeshort notes on the following:(i) Carbylaminereaction (ii) Diazotisation(iii) Hofmann’sbromamide reaction (iv) Couplingreaction(v) Ammonolysis (vi) Acetylation(vii) Gabrielphthalimide synthesis.

How does high lattice energy affect solubility?

ntWhy these s block elements like Li, Be, Mg don't form ionic hydrides ?n

99.The number of non bonded electron pairs in ClO4 - ion is 1) 6. 2) 9. 3) 4. 4) 10

one mole of a real gas is subjected to a process from (2 bar, 30 L, 300 K) to (2 bar, 40 L, 500 K) Given : Cv=25 J/ mol K, Cp=40 J/ mol K Calculate △U:

The weakest interaction among the following is _____.

The solubility of lead (II) iodide is 0.064 g/100 mL at 25o C. What is its solubility product?

The number of Faradays (F) required to produce 9 g of aluminium from molten AlCl3 is(Atomic mass of Al=27 g mol–1)

For an adiabatic, irreversible, free expansion which of the following is/are true

What is covalent bond?

during the electrolysis of molten sodium chloride the time required to produce 0.10 mol of chlorine gas using a current of 3 ampere is- 1) 55 min. 2) 110 min. 3) 220 min. 4) 330 min.

combustion of 1 mol of benzene at 298K and 1 atm pressure produces 3267 kJ of heat. Calculate the s†an dard enthalpy of formation of benzene given that the enthalpy of formation of CO_{2_{(g)}} and H_2O_{(g) }are -393.5 kJ/mol and -285.83 kJ/ol respectively

At constant P of 0.0821 atm logV v/s log T graph is plotted for 3 samples of ideal gas as shown. The value of moles of gas in these three samples is respectively: (Given:log 1=0, log 2=0.3010, log 3=0.4771)

Q. 1 mole of an ideal gas expands Isothermally and irreversibly from a pressure of 10 atm to 1 atm against a cons†an t external pressure of 5 atm. Calculate the work done at 300K

The correct order of decreasing boiling points of CH3CONH2 (A) CH3COCl (B) CH3COOH (C) and (CH3CO)2O (D) is:

The solubility product Mg(OH)2 and Al(OH)3 in water at 25∘C are 2.56×10−13 and 4.32×10−34 . If s1 and s2 are the solubilities of Mg(OH)2 and Al(OH)3 in water in mol/L at 25∘C what is the ratio s1/s2 ?

The root mean square speed of the gas molecules is 300 m/s. What will be the root mean square speed of the molecules if the atomic weight is doubled and absolute temperature is halved?1) 300 m/s2) 150 m/s3) 600 m/s4) 75 m/s

EXPLAIN STRUCTURE OF CONTRACTILE PROTEIN IN SIMPLE WORDS WITH A WELL LABELLED DIAGRAM??

Calculate the enthalpy change when 50 mL of 0.01 M Ca(OH)2 reacts with 25 mL of 0.01 M HCl. Given that ΔHo of neutralization of a strong acid and a strong base is 14 kcal mol−1

Potassium crystallizes in a body centered cubic lattice .How many unit cell are present in 2g potassium? ATOMIC MASS of K = 39.

What is luminous intensity?

The compressiblity factor (Z) for 1 mole of a real gas at low pressure can be written as:

fischer tropsch process is used for manufacture of

The compound 'C' in the above sequence of reaction is

Several blocks of magnesium are fixed to the bottom of a ship to

The thermal stability order of the carbonates is (1)NA2CO3>K2CO3>BECO3>BACO3 (2)K2CO3>NA2CO3>BACO3>BECO3 (3) BaCO3 > BeCO3 > K2CO> Na2CO3(4) BeCO3 > Na2CO > BaCO, > K2CO3

Find the degree of unsaturation for the following compounds A, B, C respectively:A)B)C)

What volume of ammonia gas at NTP will be required to passed into 30ml of H_2SO_{4 }to bring down the acid normality to 0.2N

The pH of a solution obtained by mixing 100ml of 0.2 M CH3COOH with 100 ml of 0.2 M NaOH will be

How many litre of oxygen at STP is required to burn 60 g C_2H_6?

Which of the following relation is correct? (IE = Ionisation energy in eV/atom, EA = Electron affinity in eV/atom, EN = Electronegativity in Mulliken scale)

Find out the valency of the atoms represented by the figures(a) ​(b)

the period of revolution of an electron in the 1st orbit to that of in the 2nd orbit of H atom is in the ratio of

X-rays scattered from a crystal have a first-order diffraction peak at12.5deg. At what angle will the second-and third-order peaks appear?

Find out the valency of the atoms represented by the figures(a) (b)