100525 + Interview Questions in GENERAL QA IN GENERAL AWARENESS Page 208 InterviewSolution

10351.	Write the hybridization and shape of the following : a). [CoF6]3- b). [Ni(CN)4]2- [Atomic no Co = 27, Ni= 28
Answer» (a) sp³d² , octahedral (b) dsp² , square planar

10351.

Write the hybridization and shape of the following : a). [CoF6]3- b). [Ni(CN)4]2- [Atomic no Co = 27, Ni= 28

Answer»

(a) sp³d² , octahedral

(b) dsp² , square planar

Discussion

10352.	Show that is the half life period of a first order reaction is independent of then initial concentration of the reactant.
Answer» For first order reaction, equation of rate constant is K = \(\frac{2.303}{t}\) log \(\frac{a}{a-x}\) Where a = initial concentration of reactant When half of the reaction is completed, x = \(\frac{a}{2}\) a - x = a - \(\frac{a}{2}\) = \(\frac{a}{2}\) putting t = t_1/2 in the equation, we get k = 2.303/ t_1/2\(\Big(\frac{a}{a/2}\Big)\) = 2.303/ t_1/2 log 2 = 0.693/k This shows half-life is independent from initial concentration of reactant

10352.

Show that is the half life period of a first order reaction is independent of then initial concentration of the reactant.

Answer»

For first order reaction, equation of rate constant is K = \(\frac{2.303}{t}\) log \(\frac{a}{a-x}\)

Where a = initial concentration of reactant

When half of the reaction is completed, x = \(\frac{a}{2}\)

a - x = a - \(\frac{a}{2}\) = \(\frac{a}{2}\)

putting t = t_1/2 in the equation, we get

k = 2.303/ t_1/2\(\Big(\frac{a}{a/2}\Big)\) = 2.303/ t_1/2 log 2 = 0.693/k

This shows half-life is independent from initial concentration of reactant

Discussion

10353.	IUPAC name H2[PtCl6] is-(a) Hydrogen hexachloro platinate (IV)(b) Hydrogen hexachloro platinate (II)(c) Hydrogen hexa chlorido Pt(IV)(d) Hydrogen hexa chlorido Pt(II)
Answer» Answer is (c) Hydrogen hexa chlorido Pt(IV)

Discussion

10354.	Mercuric chloride reacts with ammonia gas and forms white precipitate. The molecular formula of white precipitate is-(a) HgCl2.2NH3(b) Hg(NH3)2Cl(c) Hg(NH2)Cl2(d) Hg(NH2)Cl
Answer» Answer is (b) Hg(NH₃)₂Cl

Discussion

10355.	For the reaction `Ato` prouducts, the following data is given for a particular run. `{:("time(min.):",0,5,15,25),(1/([A])(M-1):,1,2,4,8):}` Determine the order of the reaction.
Answer» Correct Answer - 2 For the reaction A `to` products , the following data is given for a particular run. `{:("time(min):",0,5,15,35),(1/([A])(M^(-)1):,1,2,4,8):}` Determine the order of the reaction `{:(":",0,5,15,35),([A]:,1,0.5,0.25,0.125):}` Second order reaction

Discussion

10356.	If `(dx)/(dt)=k[H_(3)O^(+)]n` and rate becomes 100 times when pH changes from 2 to 1 Hence order of reactions is
Answer» `(dx)/(dt)=k[H^+]^nimplies r_1=k[10^(-2)]^nimplies r_2=k[10^(-1)]^n` `r_1=k[10^(-2n)]`…(i) `100 r=k(10^(-n))`…(ii) Divide:(i)/(ii) `implies 1/100=10^(-n)implies n=2`

Discussion

10357.	The rate law expresses the relationship of the rate of a reaction to the rate constant and the concentration of the reactants raised to some powers for the general reaction. `aA+bBtocC+dD` Rate law takes the form `r=k[A]^(x)[B]^(y)` where x and y are number that must be determined experimentely k is the rate constant and [A] and [B] are concentration of A & B respectively. The initial rate of zero order reaction of the gaseous equation `A(g)to2B (g)` is `10^(-2) M min^(-1)` If the initial concentration of A is 0.1 M what would be concentration of B after 60 seconds ?A. 0.09 MB. 0.01 MC. 0.02 MD. 0.03 M
Answer» Correct Answer - C `r=k_1 " " [C]_t=C_0-kt` `=0.1-10^(-1)xx1=0.09` M `[B]_t=0.01xx2=0.02 M`

Discussion

10358.	The rate law expresses the relationship of the rate of a reaction to the rate constant and the concentration of the reactants raised to some powers for the general reaction. `aA+bBtocC+dD` Rate law takes the form `r=k[A]^(x)[B]^(y)` where x and y are number that must be determined experimentely k is the rate constant and [A] and [B] are concentration of A & B respectively. Gaseous reaction `AtoB+C` follows first order kinetics concentration of A changes from A changes from 1M to 0.25M in 138.6 min.Find the rate of reaction when conc. of A is 0.1 M.A. `10^(-2) M "min"^(-1)`B. `10^(-3) M "min"^(-1)`C. `10^(-5) M "min"^(-1)`D. `10^(-2) M "min"^(-1)`
Answer» Correct Answer - B `r=k[A]=0.693/69.3xx0.1=10^(-3) M, t_(1//2)=69.3` min

Discussion

10359.	When did new education Policy launch ?(a) 1980(b) 1982(c) 1986(d) 1990.
Answer» 1986 in new education Policy launch.

Discussion

10360.	Dandi Yatra is related with- (a) Rajendra Prasad(b) Mahatma Gandhi (c) Subhash Chandra (d) None
Answer» Dandi Yatra is related with Mahatma Gandhi

Discussion

10361.	How many Characterstics of Caste System have been described by G.S. Ghurye ?(a) 4(b) 6(c) 8(d) 10
Answer» 6 of Caste System have been described by G.S. Ghurye.

Discussion

10362.	Who gave racial thory of caste system ?(a) G.S. Ghurye(b) Blunt(c) Gandhijee(d) None of these
Answer» (d) None of these

Discussion

10363.	MIHAN project is being developed in _________ district?1. Nandurbar2. Nashik3. Amravati4. Nagpur
Answer» Correct Answer - Option 4 : Nagpur The correct answer is Nagpur. MIHAN project is being developed in Nagpur district. MIHAN stands for Multi-Modal International Passenger and Hub Airport at Nagpur. The project also consists of setting up a Multi-Product SEZ adjacent to the Airport. It was envisaged by the Government of Maharashtra. Objective - To remove the development backlog of the Vidharbha Region and harnessing the potential of the existing Dr. Baba Saheb Ambedkar Airport at Nagpur. Implementation - By Mihan India Ltd (MIL), a newly formed joint venture entity of the Airports Authority of India (AAI) and Maharashtra Airport Development Company (MDAC). Nagpur is the second capital of Maharashtra and located at the geographical center of the country, which is accessible by roads, railway, and airways. The multiproduct Special economic zone (SEZ) is also being set up with a focus on the aviation and aerospace sector. The SEZ is being developed by MADC. Maharashtra Airport Development Company Limited (MADC) was constituted in the year 2002 by the Government of Maharashtra. It is a special purpose company to develop Multi-modal International Hub Airport at Nagpur (MIHAN) and Aviation Infrastructure in the State of Maharashtra to provide regional air connectivity. Special Economic Zones The Special Economic Zones act, 2005 provides for the establishment, development, and management of the Special Economic Zones for the promotion of exports. Objective Generation of additional economic activity. Promotion of exports of goods and services. Promotion of investment from domestic and foreign sources. Creation of employment opportunities. Development of infrastructure facilities. SEZs are foreign territory for the purposes of trade operations, duties, and tariffs.

10363.

MIHAN project is being developed in _________ district?1. Nandurbar2. Nashik3. Amravati4. Nagpur

Answer» Correct Answer - Option 4 : Nagpur

The correct answer is Nagpur.

MIHAN project is being developed in Nagpur district.
MIHAN stands for Multi-Modal International Passenger and Hub Airport at Nagpur.
The project also consists of setting up a Multi-Product SEZ adjacent to the Airport.
It was envisaged by the Government of Maharashtra.
Objective - To remove the development backlog of the Vidharbha Region and harnessing the potential of the existing Dr. Baba Saheb Ambedkar Airport at Nagpur.
Implementation - By Mihan India Ltd (MIL), a newly formed joint venture entity of the Airports Authority of India (AAI) and Maharashtra Airport Development Company (MDAC).
Nagpur is the second capital of Maharashtra and located at the geographical center of the country, which is accessible by roads, railway, and airways.
The multiproduct Special economic zone (SEZ) is also being set up with a focus on the aviation and aerospace sector.

The SEZ is being developed by MADC.
Maharashtra Airport Development Company Limited (MADC) was constituted in the year 2002 by the Government of Maharashtra.
It is a special purpose company to develop Multi-modal International Hub Airport at Nagpur (MIHAN) and Aviation Infrastructure in the State of Maharashtra to provide regional air connectivity.

Special Economic Zones

The Special Economic Zones act, 2005 provides for the establishment, development, and management of the Special Economic Zones for the promotion of exports.
Objective
1. Generation of additional economic activity.
2. Promotion of exports of goods and services.
3. Promotion of investment from domestic and foreign sources.
4. Creation of employment opportunities.
5. Development of infrastructure facilities.
SEZs are foreign territory for the purposes of trade operations, duties, and tariffs.

Discussion

10364.	Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas ? (Assume non-expansion work is zero) (1) Adiabatic process : ΔU = –w (2) Cyclic process : q = – w (3) Isothermal process : q = – w (4) Isochoric process : ΔU = q
Answer» Correct option (1) Adiabatic process : ΔU = –w Explanation: Ist law of thermodynamics ΔE = q + w 1. Adiabatic process q = 0, (ΔE = w) or (ΔU = w) 2. Cyclic process ΔE = 0, (q = – w) 3. Isothermal process ΔE = nC_VΔT, (ΔT = 0) ΔE = 0, (q = –w) 4. Isochoric process ΔV = 0 w = PΔV = 0 ΔE = q

10364.

Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas ? (Assume non-expansion work is zero) (1) Adiabatic process : ΔU = –w (2) Cyclic process : q = – w (3) Isothermal process : q = – w (4) Isochoric process : ΔU = q

Answer»

Correct option (1) Adiabatic process : ΔU = –w

Explanation:

Ist law of thermodynamics

ΔE = q + w

1. Adiabatic process

q = 0, (ΔE = w) or (ΔU = w)

2. Cyclic process

ΔE = 0, (q = – w)

3. Isothermal process

ΔE = nC_VΔT, (ΔT = 0)

ΔE = 0, (q = –w)

4. Isochoric process ΔV = 0

w = PΔV = 0

ΔE = q

Discussion

10365.	Which of the following combination of statements is true regarding the interpretation of the atomic orbitals?(a) An electron in an orbital of high angular momentum stays away from the nucleus than an electron in the orbital of lower angular momentum.(b) For a given value of the principal quantum number, the size of the orbit is inversely proportional to the azimuthal quantum number.(c) According to wave mechanics, the ground state angular momentum is equal to h/2π.(d) The plot of Ψ Vs r for various azimuthal quantum numbers, shows peak shifting towards higher r value. (1) (b), (c) (2) (a), (d) (3) (a), (b) (4) (a), (c)
Answer» The correct option (4) (a), (c) Explanation: mvr = n(h/2π) -constant If mvr is high n is high so electron stays away from the nucleus. For ground state n = 1.

10365.

Which of the following combination of statements is true regarding the interpretation of the atomic orbitals?(a) An electron in an orbital of high angular momentum stays away from the nucleus than an electron in the orbital of lower angular momentum.(b) For a given value of the principal quantum number, the size of the orbit is inversely proportional to the azimuthal quantum number.(c) According to wave mechanics, the ground state angular momentum is equal to h/2π.(d) The plot of Ψ Vs r for various azimuthal quantum numbers, shows peak shifting towards higher r value. (1) (b), (c) (2) (a), (d) (3) (a), (b) (4) (a), (c)

Answer»

The correct option (4) (a), (c)

Explanation:

mvr = n(h/2π) -constant

If mvr is high n is high so electron stays away from the nucleus.

For ground state n = 1.

Discussion

10366.	With respect to an ore, Ellingham diagram helps to predict the feasibility of its - (1) Electrolysis (2) Thermal reduction (3) Zone refining (4) Vapour phase refining
Answer» Correct option (2) Thermal reduction Explanation: Thermal reduction Reduction by (C) and (CO)

10366.

With respect to an ore, Ellingham diagram helps to predict the feasibility of its - (1) Electrolysis (2) Thermal reduction (3) Zone refining (4) Vapour phase refining

Answer»

Correct option (2) Thermal reduction

Explanation:

Thermal reduction

Reduction by (C) and (CO)

Discussion

10367.	The increasing order of pKa of the following amino acids in aqueous solution is : Gly Asp Lys Arg (1) Asp < Gly < Arg < Lys(2) Arp < Lys < Gly < Asp(3) Gly < Asp < Arg < Lys (4) Asp < Gly < Lys < Arg
Answer» Correct option (4) Asp < Gly < Lys < Arg Explanation: Asp (3) Gly (6) Lys (9.8) Arg (10.8)

10367.

The increasing order of pKa of the following amino acids in aqueous solution is : Gly Asp Lys Arg (1) Asp < Gly < Arg < Lys(2) Arp < Lys < Gly < Asp(3) Gly < Asp < Arg < Lys (4) Asp < Gly < Lys < Arg

Answer»

Correct option (4) Asp < Gly < Lys < Arg

Explanation:

Asp (3) Gly (6) Lys (9.8) Arg (10.8)

Discussion

10368.	The correct order of the spin-only magnetic moment of metal ions in the following low spin complexes, [V(CN)6]4– , [Fe(CN)6]4– , [Ru(NH3)6] 3+, and [Cr(NH3)6]2+ is - (1) V2+ > Cr2+ > Ru3+ > Fe2+ (2) V2+ > Ru3+ > Cr2+ > Fe2+ (3) Cr2+ > Ru3+ > Fe2+ > V2+ (4) Cr2+ > V2+ > Ru3+ > Fe2+
Answer» Correct option (1) V²⁺ > Cr²⁺ > Ru³⁺ > Fe²⁺ Explanation: Due to unpaired electron and pairings electrons due to strong ligands.

10368.

The correct order of the spin-only magnetic moment of metal ions in the following low spin complexes, [V(CN)6]4– , [Fe(CN)6]4– , [Ru(NH3)6] 3+, and [Cr(NH3)6]2+ is - (1) V2+ > Cr2+ > Ru3+ > Fe2+ (2) V2+ > Ru3+ > Cr2+ > Fe2+ (3) Cr2+ > Ru3+ > Fe2+ > V2+ (4) Cr2+ > V2+ > Ru3+ > Fe2+

Answer»

Correct option (1) V²⁺ > Cr²⁺ > Ru³⁺ > Fe²⁺

Explanation:

Due to unpaired electron and pairings electrons due to strong ligands.

Discussion

10369.	A water sample has ppm level concentration of the following metals : Fe = 0.2; Mn = 5.0; Cu = 3.0; Zn = 5.0. The metal that makes the water sample unsuitable drinking is (1) Zn (2) Fe (3) Mn (4) Cu
Answer» Correct option (3) Mn Explanation: (i) zn 5.0 ppm (ii) Fe 0.2 ppm (iii) Mn 5.0 ppm (iv) Cu 3.0 ppm

10369.

A water sample has ppm level concentration of the following metals : Fe = 0.2; Mn = 5.0; Cu = 3.0; Zn = 5.0. The metal that makes the water sample unsuitable drinking is (1) Zn (2) Fe (3) Mn (4) Cu

Answer»

Correct option (3) Mn

Explanation:

(i) zn 5.0 ppm

(ii) Fe 0.2 ppm

(iii) Mn 5.0 ppm

(iv) Cu 3.0 ppm

Discussion

10370.	Arrange the following in correct order of reactivity towards `Cl_(2)//hupsilon` (A) `CH_(4)` (B) `CH_(3)CH_(3)` (C ) `CH_(3)CH_(2)CH_(3)` (D) `CH_(3)-overset(CH_(3))overset(\|)(CH)-CH_(3)`A. `A gt B gt C gt D`B. `D gt C gt B gt A`C. `B gt C gt A gt D`D. `C gt B gt D gt A`
Answer» Correct Answer - B

Discussion

10371.	Arrange the following compound in reactivity towards EAS (Electrophilic aromatic substitution) reaction ? A. `A gt B gt C gt D`B. `B gt C gt A gt D`C. `D gt C gt B gt A`D. `C gt B gt D gt A`
Answer» Correct Answer - C

Discussion

10372.	The correct rate of reaction of given compounds towards electrophilic aromatic substitution reaction is(1) (b) > (d) > (a) > (c)(2) (b) > (a) > (d) > (c)(3) (c) > (a) > (d) > (b)(4) (a) > (b) > (d) > (c)
Answer» The correct option (1) (b) > (d) > (a) > (c) Explanation: The rate of reaction of given compounds towards electrophilic substitution reaction depends upon the electron density of benzenene nucleus.

10372.

The correct rate of reaction of given compounds towards electrophilic aromatic substitution reaction is(1) (b) > (d) > (a) > (c)(2) (b) > (a) > (d) > (c)(3) (c) > (a) > (d) > (b)(4) (a) > (b) > (d) > (c)

Answer»

The correct option (1) (b) > (d) > (a) > (c)

Explanation:

The rate of reaction of given compounds towards electrophilic substitution reaction depends upon the electron density of benzenene nucleus.

Discussion

10373.	An ideal liqquid flows through the horizontal pipe AB, which is of uniform cross-section. The vertical pipes `1,2` and `3` equispaced. The liqudi levels in these pipes are at heightes `h_(1), h_(2) h_(3)` respectively above AB. Liquid flows from A to B in AB.A. `h_(1) = h_(2) = h_(3)`B. `h_(2) = 1/2 (h_(1) + h_(3))`C. `h_(2) gt 1/2 (h_(1) + h_(3))`D. `h_(2) lt 1/2 (h_(1) + h_(3))`
Answer» Correct Answer - A

Discussion

10374.	Write the Lewis dot symbols and predict the valencies for the following elements: a. Phosphorous , b. Chlorine c. Argon
Answer» a.`:underset(.)overset(.)P*` (Valency=5 or 5-8=-3) b. `:underset(.)overset(.)ddotCl:` (Valency=7 or 7-8=-1) c. `:underset(..)overset(.)ddotAr:` (Valency=0)

Discussion

10375.	Which of the following is the strongest Lewis base ?A. `H_(2)O`B. `CH_3CH_2OH`C. `CH_3-O-CH_3`D. `CH_3-overset(-)Ooverset(+)Na`
Answer» Correct Answer - D `CH_3-overset(-)Ooverset(+)Na` serves as the storngest Lewis base lone pair of electron is far easily available from negatively charged oxygen atom.

Discussion

10376.	Neither liquid solvent, nor solution nor solute molecules pass through SPM. Only vapours pass through SPM. When an aqueous solution and water are separated by SPM, vapours of water molecules from water pass into solution through SPM. It is because water has higher vapour pressure than the solution. Infact, osmosis takes place from a solution of high vapour pressure to a solution of low vapour pressure. When two solutions are separated by SPM, the solution of lower molar concentration has high vapour pressure. Therefore, osmosis takes place from a solution of lower molar concentration to a solution of higher molar concentration. Goat's bladder, egg membrane, wall of living cells, parchment, cellophane etc. are common SPM. But these are not perfectly semi-permeable and are weak too. Artificially prepared cupric ferrocyanide Cu2 [Fe(CN)6] is the best SPM.i. ASSERTION – Osmotic pressure is a colligative property REASON- Osmotic pressure is directly proportional to molarity a. Both assertion and reason are true, and reason is the correct explanation of assertion. b. Both assertion and reason are true, but reason is not the correct explanation of assertion. c. Assertion is true but reason is falsed. Both assertion and reason are false.ii. ASSERTION - If the blood cells are placed in pure water, they will swell and burst REASON- Due to osmosis the movement of water molecules into the cell dilutes the salt content. a). Both assertion and reason are true, and reason is the correct explanation of assertion. b). Both assertion and reason are true, but reason is not the correct explanation of assertion. iii. ASSERTION- Osmotic pressure is numerically equivalent to the osmotic potential. REASON- Osmotic pressure is the negative pressure applied while the osmotic potential is positive. a. Both assertion and reason are true, and reason is the correct explanation of assertion. b. Both assertion and reason are true, but reason is not the correct explanation of assertion. c. Assertion is true but reason is false. d. Both assertion and reason are falsec). Assertion is true but reason is false. d). Both assertion and reason are false.iv. ASSERTION- 1 M solution of KCl has greater osmotic pressure than 1 M solution of glucose at the same pressure. REASON- In solution, KCl dissociates to produce more number of particles a. Both assertion and reason are true, and reason is the correct explanation of assertion. b. Both assertion and reason are true, but reason is not the correct explanation of assertion. c. Assertion is true but reason is false. d. Both assertion and reason are false.
Answer» (i). a (ii). c (iii). c. (iv). a (v). c

10376.

Neither liquid solvent, nor solution nor solute molecules pass through SPM. Only vapours pass through SPM. When an aqueous solution and water are separated by SPM, vapours of water molecules from water pass into solution through SPM. It is because water has higher vapour pressure than the solution. Infact, osmosis takes place from a solution of high vapour pressure to a solution of low vapour pressure. When two solutions are separated by SPM, the solution of lower molar concentration has high vapour pressure. Therefore, osmosis takes place from a solution of lower molar concentration to a solution of higher molar concentration. Goat's bladder, egg membrane, wall of living cells, parchment, cellophane etc. are common SPM. But these are not perfectly semi-permeable and are weak too. Artificially prepared cupric ferrocyanide Cu2 [Fe(CN)6] is the best SPM.i. ASSERTION – Osmotic pressure is a colligative property REASON- Osmotic pressure is directly proportional to molarity a. Both assertion and reason are true, and reason is the correct explanation of assertion. b. Both assertion and reason are true, but reason is not the correct explanation of assertion. c. Assertion is true but reason is falsed. Both assertion and reason are false.ii. ASSERTION - If the blood cells are placed in pure water, they will swell and burst REASON- Due to osmosis the movement of water molecules into the cell dilutes the salt content. a). Both assertion and reason are true, and reason is the correct explanation of assertion. b). Both assertion and reason are true, but reason is not the correct explanation of assertion. iii. ASSERTION- Osmotic pressure is numerically equivalent to the osmotic potential. REASON- Osmotic pressure is the negative pressure applied while the osmotic potential is positive. a. Both assertion and reason are true, and reason is the correct explanation of assertion. b. Both assertion and reason are true, but reason is not the correct explanation of assertion. c. Assertion is true but reason is false. d. Both assertion and reason are falsec). Assertion is true but reason is false. d). Both assertion and reason are false.iv. ASSERTION- 1 M solution of KCl has greater osmotic pressure than 1 M solution of glucose at the same pressure. REASON- In solution, KCl dissociates to produce more number of particles a. Both assertion and reason are true, and reason is the correct explanation of assertion. b. Both assertion and reason are true, but reason is not the correct explanation of assertion. c. Assertion is true but reason is false. d. Both assertion and reason are false.

Answer»

(i). a

(ii). c

(iii). c.

(iv). a

(v). c

Discussion

10377.	Which reagent is most effective to convert But-2-enal to but-2-en-1-ol?A. `K_2Cr_2O_7//H_2SO_4`B. `KMnO_4`C. `H_2//Pt`D. `NaBH_4`
Answer» Correct Answer - D `NaBH_4` reduces `C=O` but not `C=C`.

Discussion

10378.	A catalyst is a substance which:(a) Increase the equilibrium concentration of the product(b) Changes the equilibrium constant of the reaction(c) Shortens the time to reach equilibrium(d) Supplies energy to the reaction
Answer» Answer is (a) Increase the equilibrium concentration of the product

Discussion

10379.	For a zero order reaction:(a) t1/2 ∝ a(b) t1/2 ∝ 1/a(c) t1/2 ∝ a2(d) t1/2 ∝ 1/a2
Answer» Answer is (b) t_1/2 ∝ 1/a

Discussion

10380.	The rate at which a substance reacts, depends upon its:(a) Atomic Mass(b) Equivalent Mass(c) Molecular Mass(d) Active Mass
Answer» Answer is (b) Equivalent Mass

Discussion

10381.	When one faraday of electric current is passed, the mass deposited, is equal to:(a) One gram equivalent(b) One gram mole(c) Electrochemical equivalent(d) Half gram equivalent
Answer» Answer is (c) Electrochemical equivalent

Discussion

10382.	Azeotropic mixture of HCl and H2O has:(a) 48% HCl(b) 22.2% HCl(c) 36% HCl(d) 20.2% HCl
Answer» Answer is (a) 48% HCl

Discussion

10383.	A solution has an osmotic pressure of 0.0821 atm. at 300 K. Its concentration would be:(a) 0.66 M(b) 0.32 M(c) 0.066 M(d) 0.033M
Answer» Answer is (d) 0.033M

Discussion

10384.	Can PCl5 act as an oxidising as well as a reducing agent? Justify
Answer» PCl₅ can only act as an oxidizing agent. The highest oxidation state that P can show is +5. In PCl₅, phosphorus is in its highest oxidation state (+5). However, it can decrease its oxidation state and act as an oxidizing agent.

Discussion

10385.	When KMnO4 , reacts with acidified Fe2SO4 (a) Only FeSO4 is oxidised (b) Only KMnO4 is oxidised(c) FeSO4 is oxidised and KMnO4 is reduced (d) KMnO4 is oxidised and FeSO4 is reduced
Answer» (c) FeSO₄ is oxidised and KMnO₄ is reduced

Discussion

10386.	The arrangement of metals in the order of decreasing tendency to lose electrons is called .........
Answer» Activity series

Discussion

10387.	Explain the following terms with suitable example: a. Schottky defect b. Frenkel defect c. Interstitials d. F-centres
Answer» a. Schottky defect : It occurs when there is a vacancy of cation and anion sites in the lattice structure. b. Frenkel defect : It occurs in an ionic crystal when an ion occupies an interstitial position rather than normal site. c. Interstitials : Atoms of ions which occupy normally vacant interstitals (voids) in a crystal are called interstitials. d. F-centres: The free electrons trapped in the site of anion vacancies are termed as F-centres.

Discussion

10388.	Tert-butyl methyl ether on treatment with hydrogen iodide in cold givesA. tert-butyl iodide and methyl iodideB. tert-butyl alcohl and methyl alcoholC. tert-butyl alcohol and methyl iodideD. tert-butyl iodide and methyl alcohol
Answer» Correct Answer - D `underset("Tert butyl methyl ether")(CH_(3)-overset(CH_(3))overset(\|)underset(CH_(3))underset(\|)C-O -CH_(3) + HI) overset("cold")to underset("Tert. butyl iodide")(CH_(3) - overset(CH_(3))overset(\|)underset(CH_(3))underset(\|)C-I + CH_(3)OH)` The reaction carried by using `SN^(1)` mechanism.

Discussion

10389.	Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms the presence ofA. six carbon atoms lined in straight chainB. secondary alcoholic group in glucoseC. aldehyde group in glucoseD. primary alcoholic group in glucose
Answer» Correct Answer - C Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms presence of aldehyde group. Because for formation of gluconic acid free aldehyde group must be present.

Discussion

10390.	ASSERTION - [Fe(H2O)6NO]SO4 is para magnetic REASON- The Fe in [ Fe (H2O)6NO]SO4 has three unpaired electrons. a). Both assertion and reason are true, and reason is the correct explanation of assertion. b). Both assertion and reason are true, but reason is not the correct explanation of assertion. c). Assertion is true but reason is false. d). Both assertion and reason are false.
Answer» c). Assertion is true but reason is false.

Discussion

10391.	ASSERTION - Isobutanal does give iodoform testREASON- it does not have α -hydrogen Atom a). Both assertion and reason are true, and reason is the correct explanation of assertion. b). Both assertion and reason are true, but reason is not the correct explanation of assertion. c). Assertion is true but reason is false. d). Both assertion and reason are false.
Answer» c). Assertion is true but reason is false.

Discussion

10392.	The e.m.f. of the cell `Ti\|Ti^(+)(0.001M)\|\|Cu^(2+)(0.01M)\|Cu` is 0.83V the emf of this cell could b e increased byA. increase the concentration of `Cu^(++)` ionsB. Decreasing the concentration of `Ti^(+)`C. Increasing the concentration of bothD. None of these.
Answer» Correct Answer - A::B

Discussion

10393.	C(diamond) → C(graphite), ∆H = -ve, this indicates that ………(a) Graphite is more stable than diamond (b) Graphite has more energy than diamond (c) Both are equally stable (d) Stability cannot be predicted
Answer» (a) Graphite is more stable than diamond

Discussion

10394.	Corumdum isA. `SrO_(2)`B. `Al_(2)O_(3)`C. `CaCl_(2)`D. `Cu_(2)Cl_(2)`
Answer» Correct Answer - B Corundum is a compound of aluminium and consists of crystals of `alpha-Al_(2)O_(3)` (rhombic lattice).

Discussion

10395.	Whch ore can be best concentrated by froth flotation process ?A. MalachiteB. CassiteriteC. GalenaD. Manetite
Answer» Correct Answer - C Galena is `PbS` , sulphides ores are concentrated by froth flotation process.

Discussion

10396.	What kind of poisoning is known as plumbism?
Answer» LEAD POISONING.

Discussion

10397.	Whch ore can be best concentrated by froth flotation process ?A. CalamineB. GalenaC. CorundumD. Cuprite
Answer» Correct Answer - B Galena is PbS

Discussion

10398.	Which of the following materials is used along with iron ore and limestone to produce iron in a modern blast furnace? w) coke x) cementite y) coal z) bauxite
Answer» COKE is used along with iron ore and limestone to produce iron in a modern blast furnace.

Discussion

10399.	In the modern blast furnances, the charge consists of a mixture ofA. iron pyrites + bituminous coalB. hydrated iron oxides + dolomite + cokeC. calcined iron oxide + limstone + cokeD. calcined iron oxide + lime + anthracite coal
Answer» Correct Answer - A Iron pyrites and bituminous coal are charged in the modern blast furnance.

Discussion

10400.	The common method of extraction of metals from oxide ores isA. reduction with hydrogenB. electrolytic methodC. reduction with aluminiumD. reduction with carbon
Answer» Correct Answer - D `DeltaG^(@)` of formation of CO and `CO_(2)` is negative

Discussion

Explore topic-wise InterviewSolutions in .

Write the hybridization and shape of the following : a). [CoF6]3- b). [Ni(CN)4]2- [Atomic no Co = 27, Ni= 28

Show that is the half life period of a first order reaction is independent of then initial concentration of the reactant.

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Mercuric chloride reacts with ammonia gas and forms white precipitate. The molecular formula of white precipitate is-(a) HgCl2.2NH3(b) Hg(NH3)2Cl(c) Hg(NH2)Cl2(d) Hg(NH2)Cl

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The increasing order of pKa of the following amino acids in aqueous solution is : Gly Asp Lys Arg (1) Asp &lt; Gly &lt; Arg &lt; Lys(2) Arp &lt; Lys &lt; Gly &lt; Asp(3) Gly &lt; Asp &lt; Arg &lt; Lys (4) Asp &lt; Gly &lt; Lys &lt; Arg

A water sample has ppm level concentration of the following metals : Fe = 0.2; Mn = 5.0; Cu = 3.0; Zn = 5.0. The metal that makes the water sample unsuitable drinking is (1) Zn (2) Fe (3) Mn (4) Cu

Arrange the following in correct order of reactivity towards `Cl_(2)//hupsilon` (A) `CH_(4)` (B) `CH_(3)CH_(3)` (C ) `CH_(3)CH_(2)CH_(3)` (D) `CH_(3)-overset(CH_(3))overset(|)(CH)-CH_(3)`A. `A gt B gt C gt D`B. `D gt C gt B gt A`C. `B gt C gt A gt D`D. `C gt B gt D gt A`

Arrange the following compound in reactivity towards EAS (Electrophilic aromatic substitution) reaction ? A. `A gt B gt C gt D`B. `B gt C gt A gt D`C. `D gt C gt B gt A`D. `C gt B gt D gt A`

The correct rate of reaction of given compounds towards electrophilic aromatic substitution reaction is(1) (b) &gt; (d) &gt; (a) &gt; (c)(2) (b) &gt; (a) &gt; (d) &gt; (c)(3) (c) &gt; (a) &gt; (d) &gt; (b)(4) (a) &gt; (b) &gt; (d) &gt; (c)

Write the Lewis dot symbols and predict the valencies for the following elements: a. Phosphorous , b. Chlorine c. Argon

Which of the following is the strongest Lewis base ?A. `H_(2)O`B. `CH_3CH_2OH`C. `CH_3-O-CH_3`D. `CH_3-overset(-)Ooverset(+)Na`

Which reagent is most effective to convert But-2-enal to but-2-en-1-ol?A. `K_2Cr_2O_7//H_2SO_4`B. `KMnO_4`C. `H_2//Pt`D. `NaBH_4`

A catalyst is a substance which:(a) Increase the equilibrium concentration of the product(b) Changes the equilibrium constant of the reaction(c) Shortens the time to reach equilibrium(d) Supplies energy to the reaction

For a zero order reaction:(a) t1/2 ∝ a(b) t1/2 ∝ 1/a(c) t1/2 ∝ a2(d) t1/2 ∝ 1/a2

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A solution has an osmotic pressure of 0.0821 atm. at 300 K. Its concentration would be:(a) 0.66 M(b) 0.32 M(c) 0.066 M(d) 0.033M

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The arrangement of metals in the order of decreasing tendency to lose electrons is called .........

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Tert-butyl methyl ether on treatment with hydrogen iodide in cold givesA. tert-butyl iodide and methyl iodideB. tert-butyl alcohl and methyl alcoholC. tert-butyl alcohol and methyl iodideD. tert-butyl iodide and methyl alcohol

Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms the presence ofA. six carbon atoms lined in straight chainB. secondary alcoholic group in glucoseC. aldehyde group in glucoseD. primary alcoholic group in glucose

The e.m.f. of the cell `Ti|Ti^(+)(0.001M)||Cu^(2+)(0.01M)|Cu` is 0.83V the emf of this cell could b e increased byA. increase the concentration of `Cu^(++)` ionsB. Decreasing the concentration of `Ti^(+)`C. Increasing the concentration of bothD. None of these.

C(diamond) → C(graphite), ∆H = -ve, this indicates that ………(a) Graphite is more stable than diamond (b) Graphite has more energy than diamond (c) Both are equally stable (d) Stability cannot be predicted

Corumdum isA. `SrO_(2)`B. `Al_(2)O_(3)`C. `CaCl_(2)`D. `Cu_(2)Cl_(2)`

Whch ore can be best concentrated by froth flotation process ?A. MalachiteB. CassiteriteC. GalenaD. Manetite

What kind of poisoning is known as plumbism?

Whch ore can be best concentrated by froth flotation process ?A. CalamineB. GalenaC. CorundumD. Cuprite

Which of the following materials is used along with iron ore and limestone to produce iron in a modern blast furnace? w) coke x) cementite y) coal z) bauxite

In the modern blast furnances, the charge consists of a mixture ofA. iron pyrites + bituminous coalB. hydrated iron oxides + dolomite + cokeC. calcined iron oxide + limstone + cokeD. calcined iron oxide + lime + anthracite coal

The common method of extraction of metals from oxide ores isA. reduction with hydrogenB. electrolytic methodC. reduction with aluminiumD. reduction with carbon

The increasing order of pKa of the following amino acids in aqueous solution is : Gly Asp Lys Arg (1) Asp < Gly < Arg < Lys(2) Arp < Lys < Gly < Asp(3) Gly < Asp < Arg < Lys (4) Asp < Gly < Lys < Arg

The correct rate of reaction of given compounds towards electrophilic aromatic substitution reaction is(1) (b) > (d) > (a) > (c)(2) (b) > (a) > (d) > (c)(3) (c) > (a) > (d) > (b)(4) (a) > (b) > (d) > (c)