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Answers posted by meena.clay6
Questions
2990
answers
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best answers
0
votes
Which one is the most acidic compound ?
answered
Mar 26, 2020
Solution :2,4,6−trinitrophenol (picric acid) is one of the most acidic phenol in the given structure
0
votes
Which one is the wrong statement ?
answered
Mar 26, 2020
Solution :In case of hydrogen like atoms, energy depends on the principal quantum number only. Hence...
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votes
An example of a sigma bonded organometallic compound is-
answered
Mar 26, 2020
solution :Grignard's reagent (RMgX) is a $\sigma$ -bonded organometallic compound.
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votes
The correct order of the stoichiometries of $AgCl$ formed when $AgNO_3$ in excess is treated with the complexes : $CoCl_3.6NH_3, CoCl_3.5NH_3, CoCl_3.4NH_3$ respectively is -
answered
Mar 26, 2020
Coordination no. 6 is to be maintainedhttps://clay6.com/mpaimg/1_c45.jpg
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votes
Which of the following is dependent on temperature ?
answered
Mar 26, 2020
Solution :Molarity depends on the volume of a solution which can be changed with change in temperatu...
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votes
Which is the incorrect statement ?
answered
Mar 26, 2020
Solution :( C ) Frenkel defect is favoured in those ionic compounds in which sizes of cation and ani...
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votes
A 20 litre container at 400 K contains $CO_2(g)$ at pressure $0.4\; atm$ and an excess of $SrO$ (neglect the volume of solid $SrO$). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of $CO_2$ attains its maximum value, will be :
(Given that : $SrCO_3 (s) \stackrel{K}\rightleftharpoons SrO (s) + CO_2 (g), Kp = 1.6 \; atm$ )
answered
Mar 26, 2020
Solution :Max . the pressure of $CO_2$ = pressure of $CO_2$ at equilibrium For reaction , $SrCO_3 \r...
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votes
Extraction of gold and silver involves leaching with $CN^–$ ion. Silver is later recovered by :
answered
Mar 26, 2020
Solution :Extraction of gold and silver involves leaching was CN − ion. Silver is later recovered
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votes
It is because of inability of $ns^2$ electrons of the valence shell to participate in bonding that :
answered
Mar 26, 2020
(4) Inertness of ns2 electrons of the valence shell to participate in bonding on moving down the gro...
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votes
Mixture of chloroxylenol and terpineol acts as :
answered
Mar 25, 2020
Mixture of chloroxylenol and terpineol acts as anitiseptic
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Match the interhalogen compounds of column I with the geometry in column II and assign the correct code .
answered
Mar 25, 2020
solution :https://clay6.com/mpaimg/1_c44.jpg
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votes
The equilibrium constants of the following are :
$N_2 + 3H_2 \rightleftharpoons 2NH_3$
$N_2 + O_2 \rightleftharpoons 2NO$
$H_2 + \frac{1}{2} O_2 \to H_2O$
The equilibrium constant (K) of the reaction :
$2NH_3 + \frac{5}{2} O_2 \stackrel{K}\rightleftharpoons 2NO + 3H_2O,$ will be
answered
Mar 25, 2020
Solution :$N_ 2 +3H_ 2 \rightleftharpoons 2NH_3 ; K _ 1 $ -----------(1)$N_ 2 +O_ 2
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votes
Pick out the correct statement with respect to $[Mn(CN)_6]^{3-}$
answered
Mar 25, 2020
Solution :The oxidization state of Mn in the complex $[Mn(CN)_6]3^{−}$ is $+3$ .As the $CN^{−}$ is a
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votes
In which pair of ions both the species contain S – S bond?
answered
Mar 25, 2020
Solution :https://clay6.com/mpaimg/1_c43.jpgpair of ions both the species contain S – S bond
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votes
Which of the following is sink for CO?
answered
Mar 25, 2020
Solution : Micro organisms present in the soil is a sink for CO
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votes
Identify A and predict the type of reaction
answered
Mar 25, 2020
Solution :m-Bromoanisole gives only the respective meta substituted aniline. This is a substitution ...
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votes
With respect to the conformers of ethane, which of the following statements is true?
answered
Mar 25, 2020
Both bond angle and bond length remain same. Conformers of ethane have different dihedral angles
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Concentration of the $Ag^+$ ions in a saturated solution of $Ag_2C_2O_4$ is $2.2 \times 10^{-4} \; mol\; L^{-1}$. Solubility product of $Ag_2C_2 O_4$ is :
answered
Mar 25, 2020
Solution :$[Ag ^{+}]=2.2\times 10 ^{ −4} mol L ^{−1}$$[C_ 2O_4 ^{2−}]=0.5[Ag ^{ +}]=0.5\times 2.2\
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votes
The reason for greater range of oxidation states in actinoids is attributed to :
answered
Mar 25, 2020
Solution :The reason for greater range of oxidation states in actinoids is attributed to 5f, 6d and ...
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votes
Name the gas that can readily decolourise acidified $KMnO_4$ solution :
answered
Mar 25, 2020
Potassium permanganate (purple colored) on reacting with sulphur dioxide reacts loses its colour and...
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votes
Which one of the following pairs of species have the same bond order?
answered
Mar 25, 2020
Solution :Molecular orbital electronic configurations and bond order values are :$O_2: \sigma1 s^2,\...
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votes
The correct increasing order of basic strength for the following compounds is :
answered
Mar 25, 2020
Solution :Electron donating −CH3 group increases the basicity while electron withdrawing NO2 group d
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votes
The heating of phenyl-methyl ethers with HI produces
answered
Mar 25, 2020
Solution :In case of phenyl methyl ether, methyl phenyl oxonium ion https://clay6.com/mpaimg/1_c40....
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votes
Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?
answered
Mar 25, 2020
Solution :https://clay6.com/mpaimg/1_c39.jpg
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votes
Which of the following statements is not correct?
answered
Mar 25, 2020
Solution :When a protein is denatured, secondary and tertiary structures are altered but the peptide...
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votes
The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is :
answered
Mar 25, 2020
Solution :In O-nitrophenol intra molecular H-Bond present. So Boiling point is low where as in p-nit...
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votes
In the correct
$X - C \equiv CH \xrightarrow[\text{(2) $CH_3CH_2Br$}]{\text{(1) $NaNH_2 / liq. NH_3$}} X \xrightarrow[\text{(2) $CH_3CH_2Br$}]{\text{$(1) NaNH_2 / liq.NH_3$}}$
X and Y are:
answered
Mar 25, 2020
( C ) X = 1 - Butyne; Y = 3 - Hexyane
0
votes
Which of the following biphenyls is optically active ?
answered
Mar 25, 2020
Solution :https://clay6.com/mpaimg/2_c38.jpgo-Substituted biphenyls are optically active as both the...
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votes
The rate of a first order reaction is $0.04 \; mol\; l^{-1} s^{-1}$ at 10 seconds and $0.03 \; mol\; l^{-1}\; s^{-1}$ at 20 seconds after initiation of the reaction. The half-life period of the reaction is :
answered
Mar 25, 2020
Solution :Arrhenius Equation -Arrhenius gave the quantitative dependence of rate constant on tempera...
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votes
The ionic radii of $A^+$ and $B^–$ ions are $0.98 \times 10^{–10}$ m and $1.81 \times 10^{–10}$ m. The coordination number of each ion in AB is :
answered
Mar 25, 2020
Solution :Here using the radius ratio ruleTherefore $\large\frac{R_{A-}}{R_{B-}}=\large\frac{0.98 \t...
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votes
Consider the following liquid-vapour equilibrium
$Liquid \rightleftharpoons Vapour$
Which of the following relations is correct ?
answered
Mar 25, 2020
Solution :According to Clausius - Clapeyron's equation$\frac{d \; ln\; P}{dT} = \frac{\Delta H_v}{RT...
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votes
Which of the following statement about hydrogen is incorrect ?
answered
Mar 25, 2020
Solution :Hydrogen has three isotopes of which protium $(_{11}H)$ is the most common. The
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votes
Which one given below is a non-reducing sugar ?
answered
Mar 25, 2020
solution :The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA...
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votes
The correct statement regarding RNA and DNA respectively is :
answered
Mar 25, 2020
Solution :( A ) The sugar component in RNA is arabinose and the sugar component in DNA is riboseIn D...
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votes
The pressure of $H_2$ required to make the potential of $H_2$-electrode zero in pure water at $298$ K is :
answered
Mar 25, 2020
Solution :$2H^{+}+2e^{-} \to H_2(g)$$\large\frac{E_H}{H_2}=\large\frac{-0.0591}{2}$$\log \frac{PH_2}...
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votes
The product formed by the reaction of an aldehyde with a primary amine is :
answered
Mar 24, 2020
Solution :The product formed by the reaction of an aldehyde with a primary amine is Schiff base. It ...
0
votes
Consider the nitration of benzene using mixed conc. $H_2SO_4$ and $HNO_3$. If a large amount of $KHSO_4$ is added to the mixture, the rate of nitration will be :
answered
Mar 24, 2020
Solution :Mechanism of nitration is :$HNO_2 +2H_2SO_4 \longrightarrow NO_2^{+} +2HSO_4^{-} +H_3O^{+}...
0
votes
$MY$ and $NY_3$, two nearly insoluble salts, have the same KSP values of $6.2 \times 10^{–13}$ at room temperature. Which statement would be true in regard to $MY$ and $NY_3$ ?
answered
Mar 24, 2020
Solution : For MY$K_{sp}=S_1^2$$S_1=\sqrt{K_{sp}}=\sqrt{6.2\times 10^{-13}}$$\qquad= 7.87 \times 10^...
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votes
Among the following the correct order of acidity is :
answered
Mar 24, 2020
Solution :The increasing order of acidity is $$\displaystyle HClO < HClO_{2} < HClO_{3} < H...
0
votes
Which of the following has longest $C – O$ bond length ? (Free $C – O$ bond length in $CO$ is $1.128 Å$)
answered
Mar 24, 2020
solution :The greater the negative charge on the carbonyl complex, the more easy it would be for the...
0
votes
Which of the following statements about the composition of the vapour over an ideal 1 : 1 molar mixture of benzene and toluene is correct ? Assume that the temperature is constant at $25^oC$. (Given, Vapour Pressure Data at $25^oC$, benzene = 12.8 kPa, toluene = 3.85 kPa)
answered
Mar 24, 2020
Solution :V.P of $C_6H_6$ > V.P of $C_6H_5CH_3$$\therefore YA=\large\frac{P^A AXA}{P}$,$ YB=\larg...
0
votes
Lithium has a bcc structure. Its density is $530\; kg\; m^{–3}$ and its atomic mass is $6.94\; g \;mol^{–1}$. Calculate the edge length of a unit cell of Lithium metal. (NA = $6.02 \times 10^{23} mol^{–1}$)
answered
Mar 24, 2020
Solution :$d= \large\frac{Zm}{N_A \times a^{3}}$ for $BCCZ=2$$530\;kg/m^{3}=\large\frac{2 \times 6....
0
votes
Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape ?
answered
Mar 24, 2020
solution :Let the number of moles of each gas =xFraction of hydrogen escaped $=\large\frac{1}{2}$$x$...
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votes
Which one of the following orders in correct for the bond dissociation enthalpy of halogen molecules ?
answered
Mar 24, 2020
Solution :A. Bond dissociation energies of halogen family decrease down the grou...
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votes
Fog is a colloidal solution of :
answered
Mar 24, 2020
Solution :is a colloidal solution in which water (liquid, dispersed phase) is dispersed in the ...
0
votes
The product obtained as a result of a reaction of nitrogen with $CaC_2$ is
answered
Mar 24, 2020
solution :When calcium carbie reacts with nitrogen under high temperature , it forms calcium cyanmid...
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votes
Which of the following reagents would distinguish cis-cyclopenta-1, 2-diol from the trans-isomer ?
answered
Mar 24, 2020
Solution :Acetone reacts with cis-cyclopenta−1,2−-1,2-diol to form cyclic ketal but does not react w
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votes
In Which of the following options the order of arrangement does not agree with the variation of property indicate against it ?
answered
Mar 24, 2020
Solution :The correct order of increasing negative electron gain enthalpy is : I < Br < F <...
0
votes
Natural rubber has :
answered
Mar 24, 2020
repeating unit in natural rubber has the cis-configurations with chain extensions on the s...
0
votes
The correct thermodynamic conditions for the spontaneous reaction at all temperatures is :
answered
Mar 24, 2020
solution :$\Delta G = \Delta H - T \Delta S$If $\Delta H <0$ and $\Delta S >0$then at all...
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