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Given that the reduced temperature,
the reduced pressure,
the reduced volume,
Thus, it can be said that the reduced equation of state may be given asCorrectIncorrect
The suitable reaction steps to carry out the following transformation isCorrectIncorrect
X + H2S → Z
Here, Z isCorrectIncorrect
For preparing 3.00 L of 1 M NaOH by mixing portions of two stock solutions (A and B) of 2.50 M NaOH and 0.40 M NaOH respectively. Find out the amount of B stock solution (in L) added.CorrectIncorrect
Sodium sulphite is used in preserving squashes and other mildly acidic foods due toCorrectIncorrect
The Vividh Bharti Station of All India Radio, Delhi, broadcasts on a frequency of 1,368 kHz (Kilohertz). Calculate the wavelength (λ) of the electromagnetic radiation emitted by transmitter. Which part of the electromagnetic spectrum does it belong toCorrectIncorrect
Which of the following soap/detergent is least, reduce space biodegradable?CorrectIncorrect
In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. Certainty with which the position of the electron can be located is
(Given, h = 6.6 × 10−34 kg m2 s−1, mass of electron em = 9.1 × 10−31 kg)CorrectIncorrect
Buna-N, a synthetic rubber is copolymer ofCorrectIncorrect
What would be the heat released when an aqueous solution containing 0.5 mole of HNO3 is mixed with 0.3 mole of OH−?
(enthalpy of neutralization is −57.1 kJ)CorrectIncorrect
The number average molar mass and mass average molar mass of a polymer are respectively 30,000 and 40,000. The polydispersity index (PDI) of the polymer isCorrectIncorrect
The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species, K+, Ca2+, Mg2+, Be2+?CorrectIncorrect
In an amino acids, the carboxyl group ionizes at and ammonium ion at The isoelectric point of the amino acid is at pHCorrectIncorrect
0.40 g of helium in a bulb at a temperature of T K had a pressure of p atm. When the bulb was immersed in water bath at temperature 50 K more than the first one, 0.08 g of gas had to be removed to restore the original pressure.CorrectIncorrect
What percentage of β-D(+)-glucopyranose is found at equilibrium in the aqueous solution?CorrectIncorrect
Which of the following is correctly arranged in order of increasing weight?CorrectIncorrect
The correct order of basic strength of the following areCorrectIncorrect
If for a given substance, melting point is TB and freezing points is TA then correct variation of entropy by graph between entropy change and temperature isCorrectIncorrect
When a mixture of 1-hexanol and hexanoic acid in diethyl ether is shaken with an aqueous NaHCO3 solution, then which of the following is right distribution?CorrectIncorrect
∆H and ∆S for the reaction,
are 30.56 kJ mol−1 and 66.00 JK−1 mol−1 respectively. The temperature at which the free energy change for the reaction will be zero, isCorrectIncorrect
The major product P will beCorrectIncorrect
If Ag+ + 2NH3 ⇌ Ag (NH3)2+; K1 = 1.7 × 107
Ag+ + Cl− ⇌ AgCl; K2 = 5.4 × 109
Then, for AgCl + 2NH3 ⇌ [Ag(NH3)2]+ + Cl− equilibrium constant will beCorrectIncorrect
What is product of the following sequence of reactions?CorrectIncorrect
For the following equilibrium (omitting charges)
I. M + Cl → MCl, Keq = β1
II. MCl + Cl → MCl2, Keq = β2
III. MCl2 + Cl → MCl3, Keq = β3
IV. M + 3Cl → MCl3, Keq = K
then relationship between K, β1, β2 and β3 isCorrectIncorrect
R―CH2―CH2―OH can be converted into RCH2CH2COOH by the following sequence of steps.CorrectIncorrect
When KMnO4 acts as an oxidizing agent and ultimately forms MnO42−, MnO2, Mn2O3 and Mn2+, then the number of electrons transferred in each case respectively areCorrectIncorrect
The product P of the given reaction isCorrectIncorrect
In acidic medium, dichromatic ion oxidizes ferrous ion to ‘ferric ion. If the gram molecular weight of potassium dichromate is 294 g, its gram equivalent weight (in grams) isCorrectIncorrect
Find out the correct stereoisomeric product for the following reaction,CorrectIncorrect
Ferrous oxide has a cubic structure. The length of edge of the unit cell is 5 Å and the density of the oxide is 4.0 g cm−3. Then the number of Fe2+ and O2− ions present in each unit cell will beCorrectIncorrect
In the reaction isCorrectIncorrect
Which of the following arrangements correctly represents hexagonal and cubic close packed structure respectively?CorrectIncorrect
0.001 mole of [Co(NH3)5(NO3)(SO4)] was passed through a cation exchanger and the acid coming out of it required 20 mL of 0.1 M NaOH for neutralization. Thus, the complex isCorrectIncorrect
The molal freezing point depression constant for benzene (C6H6) is 4.90 K kg mol−1. Selenium exists as a polymer of the type Sex. When 3.26 g of selenium is dissolved in 226g of benzene, the observed freezing point is 0.112℃ lower than that of pure benzene. The molecular formula of selenium is
(atomic mass of Se = 78.8 g mol−1)CorrectIncorrect
In the complexes [Fe(H2O)6]3+ , Fe(CN)6]3−, [Fe(C2O4)3]3− and [FeCl6]3−, mor stability is shown byCorrectIncorrect
For an ideal binary liquid solution with in which relation between Xx( mole fraction of X in liquid phase) and Yx (mole fraction of X in vapour phase) is correct, Xy and Yy are mole fraction of Y in liquid and vapour phase respectivelyCorrectIncorrect
Point out the incorrect reaction from the following.CorrectIncorrect
X, Y and Z respectively areCorrectIncorrect
A student made the following observation in the laboratory.
I. Clean copper metal did not react with 1 molar Pb(NO3)2 solution
II. Clean lead metal dissolved in a 1 molar AgNO3 solution and crystals of Ag metal appeared
III. Clean silver metal did not react with 1 molar Cu(NO3)2 solution
The order of decrease in reducing character of three metals isCorrectIncorrect
Choose the correct alkyne and reagents for the preparation ofCorrectIncorrect
The conductivity of 0.001028 mol L−1 acetic acid is 4.95 × 10−5 S cm−1. Find out its dissociation constant if ⋀m for acetic acid is 390.5 S cm−1 mol−1.CorrectIncorrect
In order to prepare one litre 1N solution of KMnO4, how many grams of KMnO4 are required, if the solution to be used in acid medium for oxidation?CorrectIncorrect
Which of the following represents the correct order of decreasing number of S = O bonds?CorrectIncorrect
A hypothetical reaction, X2 + Y2 → 2 XY follows the following mechanism
X2 ⇌ X + X ….. fast
X + Y2 → XY + Y …….. slow
X+ Y → XY ……… fast
The order of the overall reaction isCorrectIncorrect
The major role of fluorspar (CaF2) which is added in small quantity in the electrolytic reduction of alumina dissolved in fused cryolite (Na3AlF6) is
I. as a catalyst.
II. to make the fused mixture very conducting.
III. to lower the temperature of melting.
IV. to decrease the rate of oxidation of carbon at the anode.CorrectIncorrect
The variation of concentration of the product P with time in the reaction, A → P is shown in following graph.
The graph between and time will be of the typeCorrectIncorrect
Point out the correct statement.CorrectIncorrect
Which of the following represents physical adsorption?CorrectIncorrect
KMnO4 reacts with ferrous sulphate according to the following equation,
MnO4− + 5Fe2+ + 8H− → Mn2+ + 2Fe3+ + 4H2O
Here, 10 mL of 0.1 M KMnO4 is equivalent toCorrectIncorrect
In an experiment, addition of 4.0 mL of 0.005 M BaCl2 to 16.0 mL of arsenious sulphide sol just causes complete coagulation in 2 h. The flocculating value of the effective ion isCorrectIncorrect
Which of the following atomic and physical properties of hydrogen is false?CorrectIncorrect
Eutrophication of a lake means, itCorrectIncorrect
When H2O2 is added to ice cold solution of acidified potassium dichromate in ether and the contents are shaken and allowed to standCorrectIncorrect
500 mL of a sample of water required 19.6 mg of K2Cr2O7 for the oxidation of dissolved organic matter in it in the presence of H2SO4. The COD of water sample isCorrectIncorrect
The chemical formulae of X, Y and Z areCorrectIncorrect
Stability order will beCorrectIncorrect
The aqueous solution of an unknown sodium salt gives the following reactions.
I. It decolourises a solution of iodine in potassium iodide.
II. It gives white turbidity with dil. HCl solution.
III. It gives a white precipitate with AgNO3 solution which changes colours and finally becomes black on standing.
The unknown sodium salt isCorrectIncorrect
The catenation tendency of C, Si and Ge is in the order Ge < Si < C. The bond energies (in kJ mol−1) of C―C, Si―Si and Ge―Ge bonds, respectively areCorrectIncorrect
What is correct about the following structure?CorrectIncorrect
Number of oxygen atoms shared per SiO44− tetrahedron in
I. two dimensional sheet structured silicates
II. cyclic silicates and
III. single strand chain silicates respectively areCorrectIncorrect