46295 + Interview Questions in Chemistry

1.	sol has a negativecharge. Capacity to precipitate it is highest in [CPMT 1982, 89, 93; DPMT1983;MP PET 1999]
Answer» sol has a negative charge. Capacity to precipitate it is highest in [CPMT 1982, 89, 93; DPMT 1983;MP PET 1999]

1.

sol has a negativecharge. Capacity to precipitate it is highest in [CPMT 1982, 89, 93; DPMT1983;MP PET 1999]

Answer»

sol has a negative
charge. Capacity to precipitate it is highest in

[CPMT 1982, 89, 93; DPMT
1983;MP PET 1999]

2.	The ion having highest mobility in aqueous solution is
Answer» The ion having highest mobility in aqueous solution is

Discussion

3.	If the ionisation energy for H atom is 13.6 eV, calculate the required energy in eV to excite it from the ground state to the first excited state.
Answer» If the ionisation energy for H atom is $13.6 e V$ , calculate the required energy in eV to excite it from the ground state to the first excited state.

Discussion

4.	Which of the following will not enhance nutritional value of food? (a) Minerals (b) Artificial sweeteners (c) Vitamins (d) Amino acids
Answer» Which of the following will not enhance nutritional value of food? (a) Minerals (b) Artificial sweeteners (c) Vitamins (d) Amino acids

Discussion

5.	In the following molecule,Hybridization of carbon a, b and c respectively are:
Answer» In the following molecule, Hybridization of carbon a, b and c respectively are:

Discussion

6.	Balance the following redox equations in basic medium by oxidation number method :a) Zns + NO3aq- → NH3aq + Zn(OH)6aq2-b) MnCl2aq + HO2aq- → MnOH3s + Claq-c) Mnaq2+ + H2O2aq → MnO2s + H2Old) CuOH2s + N2H4aq → Cus + N2ge) FeOH2s + CrO4aq2- → FeOH3s + CrOH4aq-f) TeO3aq2- + Cl2g → TeO4aq2- + Claq-
Answer» Balance the following redox equations in basic medium by oxidation number method : a) ${Zn}_{(s)} + {NO}_{3 (aq)}^{-} \underset{}{\to} {NH}_{3 (aq)} + Zn (OH)_{6 (aq)}^{2 -}$ b) ${MnCl}_{2 (aq)} + {HO}_{2 (aq)}^{-} \underset{}{\to} Mn {(OH)}_{3 (s)} + {Cl}_{(aq)}^{-}$ c) ${Mn}_{(aq)}^{2 +} + H_{2} O_{2 (aq)} \underset{}{\to} {MnO}_{2 (s)} + H_{2} O_{(l)}$ d) $Cu {(OH)}_{2 (s)} + N_{2} H_{4 (aq)} \underset{}{\to} {Cu}_{(s)} + N_{2 (g)}$ e) $Fe {(OH)}_{2 (s)} + {CrO}_{4 (aq)}^{2 -} \underset{}{\to} Fe {(OH)}_{3 (s)} + Cr {(OH)}_{4 (aq)}^{-}$ f) ${TeO}_{3 (aq)}^{2 -} + {Cl}_{2 (g)} \underset{}{\to} {TeO}_{4 (aq)}^{2 -} + {Cl}_{(aq)}^{-}$

Discussion

7.	62.Which of the following is polyprotic acid Orthophoshoric acid Orthophosphorous acid Pyrophosphoric acid None
Answer» 62.Which of the following is polyprotic acid Orthophoshoric acid Orthophosphorous acid Pyrophosphoric acid None

Discussion

8.	An alkali metal hybride(NaH) reacts with diborane in ‘A’ to give a tetrahedral compound ‘B’ which is extensively used as reducing agent in organic synthesis. The compounds ‘A’ and ‘B’ respectively are
Answer» An alkali metal hybride(NaH) reacts with diborane in ‘A’ to give a tetrahedral compound ‘B’ which is extensively used as reducing agent in organic synthesis. The compounds ‘A’ and ‘B’ respectively are

Discussion

9.	How to easily remember periodic table
Answer» How to easily remember periodic table

Discussion

10.	The number of spheres contained(i) in one body centred cubic unit cell and (ii) in one face centred cubic unit cell, is
Answer» The number of spheres contained (i) in one body centred cubic unit cell and (ii) in one face centred cubic unit cell, is

10.

The number of spheres contained(i) in one body centred cubic unit cell and (ii) in one face centred cubic unit cell, is

Answer»

The number of spheres contained

(i) in one body centred cubic unit cell and

(ii) in one face centred cubic unit cell, is

Discussion

11.	products of reaction chloro-cyclopentylmethane with Alc KOH
Answer» products of reaction chloro-cyclopentylmethane with Alc KOH

Discussion

12.	For slaking of 15 kg of CaO, the theoretical amount of water required is
Answer» For slaking of $15 kg$ of CaO, the theoretical amount of water required is

Discussion

13.	write the IUPAC name of the following compound1) C2H5COC4H92 ) C3H7COC2H5
Answer» write the IUPAC name of the following compound1) C2H5COC4H92 ) C3H7COC2H5

Discussion

14.	Q. Which of the following pair has same hybridisation. 1] BF3 & NF3 2] SF4 & SiCl43] ClO4- & ClO2-4] CO2 & SiO2
Answer» Q. Which of the following pair has same hybridisation. 1] BF3 & NF3 2] SF4 & SiCl4 3] ClO4- & ClO2- 4] CO2 & SiO2

Discussion

15.	Whichone of the following has the highest dipole moment?(i) CH2Cl2(ii) CHCl3(iii) CCl4
Answer» Which one of the following has the highest dipole moment? (i) CH₂Cl₂ (ii) CHCl₃ (iii) CCl₄

15.

Whichone of the following has the highest dipole moment?(i) CH2Cl2(ii) CHCl3(iii) CCl4

Answer»

Which
one of the following has the highest dipole moment?

(i)
CH₂Cl₂

(ii)
CHCl₃

(iii)
CCl₄

Discussion

16.	Which of the following two reactions is SN2 and why?
Answer» Which of the following two reactions is $S_{N} 2$ and why?

Discussion

17.	N2+3H2⇌2NH3, starting with one mole of nitrogen and 3 moles of hydrogen, at equilibrium 50% of each had reacted. If the equilibrium pressure is P, the partial pressure of hydrogen at equilibrium would be:
Answer» $N_{2} + 3 H_{2} ⇌ 2 N H_{3}$ , starting with one mole of nitrogen and 3 moles of hydrogen, at equilibrium 50% of each had reacted. If the equilibrium pressure is $P$ , the partial pressure of hydrogen at equilibrium would be:

Discussion

18.	Consider the dipole moments of NH3 and NF3. Which of the following is correct?
Answer» Consider the dipole moments of $N H_{3}$ and $N F_{3}$ . Which of the following is correct?

Discussion

19.	Combustion Reaction Of Methane:- CH4(s)+2O2(g)=CO2(g)+H2O(l), H=(-890.30)KJ,If We Have To Get 445.15KJ Combustion Energy How Many Gram Methane Have To Combust? A. 4 gm B. 8 gm C. 12 gm D. 16 gm
Answer» Combustion Reaction Of Methane:- CH4(s)+2O2(g)=CO2(g)+H2O(l), H=(-890.30)KJ,If We Have To Get 445.15KJ Combustion Energy How Many Gram Methane Have To Combust? A. 4 gm B. 8 gm C. 12 gm D. 16 gm

Discussion

20.	Two metallic oxides contain 27.6% and 30% oxygen respectively. If the formula of the first oxide X3O4, that of the second will be
Answer» Two metallic oxides contain 27.6% and 30% oxygen respectively. If the formula of the first oxide X3O4, that of the second will be

Discussion

21.	Paraffins are soluble in (a) distilled water (b) benzene (c) methanol (d) sea water
Answer» Paraffins are soluble in (a) distilled water (b) benzene (c) methanol (d) sea water

Discussion

22.	The lowering of vapour pressure in a saturated aqueous solution of salt AB is found to be 0.108 torr. If vapour pressure of pure solvent at same temperature is 300 torr, find solubility product of salt AB
Answer» The lowering of vapour pressure in a saturated aqueous solution of salt AB is found to be 0.108 torr. If vapour pressure of pure solvent at same temperature is 300 torr, find solubility product of salt AB

Discussion

23.	Why is there 6 electrons in carbonation?
Answer» Why is there 6 electrons in carbonation?

Discussion

24.	Chlorine is more easily liquefied than ethane because ("a” and "b" are van der waals constants for gases).
Answer» Chlorine is more easily liquefied than ethane because ("a” and "b" are van der waals constants for gases).

Discussion

25.	Howwill you convert ethanal into the following compounds?(i) Butane-1,3-diol (ii) But-2-enal (iii) But-2-enoicacid
Answer» How will you convert ethanal into the following compounds? (i) Butane-1, 3-diol (ii) But-2-enal (iii) But-2-enoic acid

25.

Howwill you convert ethanal into the following compounds?(i) Butane-1,3-diol (ii) But-2-enal (iii) But-2-enoicacid

Answer»

How
will you convert ethanal into the following compounds?

(i) Butane-1,
3-diol (ii) But-2-enal
(iii) But-2-enoic
acid

Discussion

26.	In which of the following cases will the torch glow?
Answer» In which of the following cases will the torch glow?

Discussion

27.	In dilute aqueous H2SO4, the complex diaquodioxalatoferrate (II) is oxidized by MnO−4. For this reaction, the ratio of the rate of change of [H+] to the rate of change of [MnO−4] is
Answer» In dilute aqueous $H_{2} S O_{4}$ , the complex diaquodioxalatoferrate (II) is oxidized by $M n O_{4}^{-}$ . For this reaction, the ratio of the rate of change of $[H^{+}]$ to the rate of change of $[M n O_{4}^{-}]$ is

Discussion

28.	To check the quality of two brands of light bulbs, their life in burning hours was estimated as under for 100 brand. Life (in hrs)Number of bulbs (Brand A)Number of bulbs (Brand B)0−5015250−100208100−1501860150−2002525200−250225Total100100 (i) Which brand gives higher life ? (ii) Which brand is more dependable ?
Answer» To check the quality of two brands of light bulbs, their life in burning hours was estimated as under for 100 brand. $\begin{matrix} Life (in hrs) & Number of bulbs (Brand A) & Number of bulbs (Brand B) 0 - 50 & 15 & 2 50 - 100 & 20 & 8 100 - 150 & 18 & 60 150 - 200 & 25 & 25 200 - 250 & 22 & 5 Total & 100 & 100 \end{matrix}$ (i) Which brand gives higher life ? (ii) Which brand is more dependable ?

28.

To check the quality of two brands of light bulbs, their life in burning hours was estimated as under for 100 brand. Life (in hrs)Number of bulbs (Brand A)Number of bulbs (Brand B)0−5015250−100208100−1501860150−2002525200−250225Total100100 (i) Which brand gives higher life ? (ii) Which brand is more dependable ?

Answer»

To check the quality of two brands of light bulbs, their life in burning hours was estimated as under for 100 brand.

$\begin{matrix} Life (in hrs) & Number of bulbs (Brand A) & Number of bulbs (Brand B) 0 - 50 & 15 & 2 50 - 100 & 20 & 8 100 - 150 & 18 & 60 150 - 200 & 25 & 25 200 - 250 & 22 & 5 Total & 100 & 100 \end{matrix}$

(i) Which brand gives higher life ?

(ii) Which brand is more dependable ?

Discussion

29.	The major product that is not formed in the above reaction is:
Answer» The major product that is not formed in the above reaction is:

Discussion

30.	Which hybridization is present in NH3?is hybridization is present in all kinds of covalent compounds ?
Answer» Which hybridization is present in NH3?is hybridization is present in all kinds of covalent compounds ?

Discussion

31.	In the following question a statement of assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Boron has a smaller first ionisation enthalpy than beryllium. Reason (R) The penetration of 2s electron to the nucleus is more than the 2p electron hence 2p electron is more shielded by the inner core of electrons than th e2s elelctrons. (a) Assertion and reason both the correct statement but reson is not correct explanation for assertion. (b) Assertion is correct statement but reason is wrong statement. (c) Assertion and reason both are are corect statement and reason is correct eplanation for assertion. (d) assertion and reason both are wrong statements
Answer» In the following question a statement of assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Boron has a smaller first ionisation enthalpy than beryllium. Reason (R) The penetration of 2s electron to the nucleus is more than the 2p electron hence 2p electron is more shielded by the inner core of electrons than th e2s elelctrons. (a) Assertion and reason both the correct statement but reson is not correct explanation for assertion. (b) Assertion is correct statement but reason is wrong statement. (c) Assertion and reason both are are corect statement and reason is correct eplanation for assertion. (d) assertion and reason both are wrong statements

Discussion

32.	At 90^° C, pure water has \lbrack H2O'\rbrack = 10-6 moL L-1. What is the value of K, at 90^° C?(1) 10-6(2) 1012(3) 10-144)10-1216. The degree of dissociation of 0.1 M CH.COOH will be equal to(Given: K(CH2COOH) = 1x10)(1) 10-5(2) 10-4(3) 10-3(410-217ther havingpH = 4 are mixed. The pH of thefo
Answer» At 90^° C, pure water has \lbrack H2O'\rbrack = 10-6 moL L-1. What is the value of K, at 90^° C?(1) 10-6(2) 1012(3) 10-144)10-1216. The degree of dissociation of 0.1 M CH.COOH will be equal to(Given: K(CH2COOH) = 1x10)(1) 10-5(2) 10-4(3) 10-3(410-217ther havingpH = 4 are mixed. The pH of thefo

Discussion

33.	which of the following will react with water most readily? 1)tropyllium chloride 2)vinyl chloride 3)allyl chloride 4t-butylchloride
Answer» which of the following will react with water most readily? 1)tropyllium chloride 2)vinyl chloride 3)allyl chloride 4t-butylchloride

Discussion

34.	Is carbonic acid formed during acid rain?
Answer» Is carbonic acid formed during acid rain?

Discussion

35.	It has been estimated that 93% of all atoms in the entire universe are hydrogen and that the vast majority of those remaining are helium. Based on only these two elements, estimate the mass percentage of hydrogen in the universe.
Answer» It has been estimated that $93 %$ of all atoms in the entire universe are hydrogen and that the vast majority of those remaining are helium. Based on only these two elements, estimate the mass percentage of hydrogen in the universe.

Discussion

36.	The set representing the correct order of first ionization potential is :
Answer» The set representing the correct order of first ionization potential is :

Discussion

37.	Where we have to use M¹V¹=M²V² and M¹V¹=M(f)V(f)
Answer» Where we have to use M¹V¹=M²V² and M¹V¹=M(f)V(f)

Discussion

38.	What are the Boyle' s laws?
Answer» What are the Boyle' s laws?

Discussion

39.	The stability of (CH3)2C=CH2 is more than that of CH3CH2CH=CH2 due to
Answer» The stability of (CH₃)₂C=CH₂ is more than that of CH₃CH₂CH=CH₂ due to

Discussion

40.	A light of wavelength λ falls on a metal having work function W=hc/λ0. The photoelectric effect will take place only if:
Answer» A light of wavelength $λ$ falls on a metal having work function $W = h c / λ_{0}$ . The photoelectric effect will take place only if:

Discussion

41.	Chlorobenzene is
Answer» Chlorobenzene is

Discussion

42.	energy of 2s orbital is maximum for which of the following orbital?HKNaLi
Answer» energy of 2s orbital is maximum for which of the following orbital? H K Na Li

Discussion

43.	Which one has higher ionisation enthalpy - fluoride anion or chloride anion ? Does it have anything to do with vacant d - orbital in chloride anion ?
Answer» Which one has higher ionisation enthalpy - fluoride anion or chloride anion ? Does it have anything to do with vacant d - orbital in chloride anion ?

Discussion

44.	There are two charges Q1 an Q2 kept at a distance . There is a midpoint E marked. There is a point B has same horizontal distance from E to either charge and electric feild at B due to either charge had magnitude 1.0×10^6, what it's the magnitude of net electric feild?
Answer» There are two charges Q1 an Q2 kept at a distance . There is a midpoint E marked. There is a point B has same horizontal distance from E to either charge and electric feild at B due to either charge had magnitude 1.0×10^6, what it's the magnitude of net electric feild?

Discussion

45.	basic ch of paraaminopehnol ,metaaminophenol,orthoaminophenol here orthophenolamino should be greater tham paraaminopehnol
Answer» basic ch of paraaminopehnol ,metaaminophenol,orthoaminophenol here orthophenolamino should be greater tham paraaminopehnol

Discussion

46.	In face centred cubic (fcc) crystal lattice, edge length of the unit cell is 400 pm. Find the diameter fo the greatest sphere which can be fitted into the interstitial void without distortion of lattice.
Answer» In face centred cubic (fcc) crystal lattice, edge length of the unit cell is $400 pm$ . Find the diameter fo the greatest sphere which can be fitted into the interstitial void without distortion of lattice.

Discussion

47.	Why E1cb reaction show Molecularity 1 although nucleophile attack on fast step of reaction?
Answer» Why E1cb reaction show Molecularity 1 although nucleophile attack on fast step of reaction?

Discussion

48.	A 3d series metal cation forms octahedral complexes with both −SCN as well −CN ions as ligands. The complex [M(CN)6]3− has a spin only magnetic moment of √3 BM whereas the complex [M(SCN)6]3− has a spin only magnetic moment of √35 BM. Then out of the following, metal M can be
Answer» A $3 d$ series metal cation forms octahedral complexes with both $^{-} S C N$ as well $^{-} C N$ ions as ligands. The complex $[M (C N)_{6}]^{3 -}$ has a spin only magnetic moment of $\sqrt{3} B M$ whereas the complex ${[M (S C N)_{6}]}_{6}^{3 -}$ has a spin only magnetic moment of $\sqrt{35} B M$ . Then out of the following, metal $M$ can be

Discussion

49.	The standard heats of formation of NO2 (g) and N2O4 (g) are 8.0 and 2.0 kcal mol−1 respectively, the heat of dimerization of NO2 in kcal is
Answer» The standard heats of formation of $N O_{2}$ (g) and $N_{2} O_{4}$ (g) are $8.0$ and $2.0 k c a l m o l^{- 1}$ respectively, the heat of dimerization of $N O_{2}$ in $k c a l$ is

Discussion

50.	The enthalpy (H) of an elementary exothermic reaction A⇌B is schematically plotted against the reaction coordinates. The plots in the presence and absence of a catalyst are shown in dashed and solid lines, respectively. Identify the correct plot for the reaction:
Answer» The enthalpy (H) of an elementary exothermic reaction $A ⇌ B$ is schematically plotted against the reaction coordinates. The plots in the presence and absence of a catalyst are shown in dashed and solid lines, respectively. Identify the correct plot for the reaction:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

sol has a negativecharge. Capacity to precipitate it is highest in [CPMT 1982, 89, 93; DPMT1983;MP PET 1999]

The ion having highest mobility in aqueous solution is

If the ionisation energy for H atom is 13.6 eV, calculate the required energy in eV to excite it from the ground state to the first excited state.

Which of the following will not enhance nutritional value of food? (a) Minerals (b) Artificial sweeteners (c) Vitamins (d) Amino acids

In the following molecule,Hybridization of carbon a, b and c respectively are:

62.Which of the following is polyprotic acid Orthophoshoric acid Orthophosphorous acid Pyrophosphoric acid None

An alkali metal hybride(NaH) reacts with diborane in ‘A’ to give a tetrahedral compound ‘B’ which is extensively used as reducing agent in organic synthesis. The compounds ‘A’ and ‘B’ respectively are

How to easily remember periodic table

The number of spheres contained(i) in one body centred cubic unit cell and (ii) in one face centred cubic unit cell, is

products of reaction chloro-cyclopentylmethane with Alc KOH

For slaking of 15 kg of CaO, the theoretical amount of water required is

write the IUPAC name of the following compound1) C2H5COC4H92 ) C3H7COC2H5

Q. Which of the following pair has same hybridisation. 1] BF3 & NF3 2] SF4 & SiCl43] ClO4- & ClO2-4] CO2 & SiO2

Whichone of the following has the highest dipole moment?(i) CH2Cl2(ii) CHCl3(iii) CCl4

Which of the following two reactions is SN2 and why?

N2+3H2⇌2NH3, starting with one mole of nitrogen and 3 moles of hydrogen, at equilibrium 50% of each had reacted. If the equilibrium pressure is P, the partial pressure of hydrogen at equilibrium would be:

Consider the dipole moments of NH3 and NF3. Which of the following is correct?

Combustion Reaction Of Methane:- CH4(s)+2O2(g)=CO2(g)+H2O(l), H=(-890.30)KJ,If We Have To Get 445.15KJ Combustion Energy How Many Gram Methane Have To Combust? A. 4 gm B. 8 gm C. 12 gm D. 16 gm

Two metallic oxides contain 27.6% and 30% oxygen respectively. If the formula of the first oxide X3O4, that of the second will be

Paraffins are soluble in (a) distilled water (b) benzene (c) methanol (d) sea water

The lowering of vapour pressure in a saturated aqueous solution of salt AB is found to be 0.108 torr. If vapour pressure of pure solvent at same temperature is 300 torr, find solubility product of salt AB

Why is there 6 electrons in carbonation?

Chlorine is more easily liquefied than ethane because ("a” and "b" are van der waals constants for gases).

Howwill you convert ethanal into the following compounds?(i) Butane-1,3-diol (ii) But-2-enal (iii) But-2-enoicacid

In which of the following cases will the torch glow?

In dilute aqueous H2SO4, the complex diaquodioxalatoferrate (II) is oxidized by MnO−4. For this reaction, the ratio of the rate of change of [H+] to the rate of change of [MnO−4] is

The major product that is not formed in the above reaction is:

Which hybridization is present in NH3?is hybridization is present in all kinds of covalent compounds ?

At 90^° C, pure water has \lbrack H2O'\rbrack = 10-6 moL L-1. What is the value of K, at 90^° C?(1) 10-6(2) 1012(3) 10-144)10-1216. The degree of dissociation of 0.1 M CH.COOH will be equal to(Given: K(CH2COOH) = 1x10)(1) 10-5(2) 10-4(3) 10-3(410-217ther havingpH = 4 are mixed. The pH of thefo

which of the following will react with water most readily? 1)tropyllium chloride 2)vinyl chloride 3)allyl chloride 4t-butylchloride

Is carbonic acid formed during acid rain?

It has been estimated that 93% of all atoms in the entire universe are hydrogen and that the vast majority of those remaining are helium. Based on only these two elements, estimate the mass percentage of hydrogen in the universe.

The set representing the correct order of first ionization potential is :

Where we have to use M¹V¹=M²V² and M¹V¹=M(f)V(f)

What are the Boyle' s laws?

The stability of (CH3)2C=CH2 is more than that of CH3CH2CH=CH2 due to

A light of wavelength λ falls on a metal having work function W=hc/λ0. The photoelectric effect will take place only if:

Chlorobenzene is

energy of 2s orbital is maximum for which of the following orbital?HKNaLi

Which one has higher ionisation enthalpy - fluoride anion or chloride anion ? Does it have anything to do with vacant d - orbital in chloride anion ?

There are two charges Q1 an Q2 kept at a distance . There is a midpoint E marked. There is a point B has same horizontal distance from E to either charge and electric feild at B due to either charge had magnitude 1.0×10^6, what it's the magnitude of net electric feild?

basic ch of paraaminopehnol ,metaaminophenol,orthoaminophenol here orthophenolamino should be greater tham paraaminopehnol

In face centred cubic (fcc) crystal lattice, edge length of the unit cell is 400 pm. Find the diameter fo the greatest sphere which can be fitted into the interstitial void without distortion of lattice.

Why E1cb reaction show Molecularity 1 although nucleophile attack on fast step of reaction?

A 3d series metal cation forms octahedral complexes with both −SCN as well −CN ions as ligands. The complex [M(CN)6]3− has a spin only magnetic moment of √3 BM whereas the complex [M(SCN)6]3− has a spin only magnetic moment of √35 BM. Then out of the following, metal M can be

The standard heats of formation of NO2 (g) and N2O4 (g) are 8.0 and 2.0 kcal mol−1 respectively, the heat of dimerization of NO2 in kcal is

The enthalpy (H) of an elementary exothermic reaction A⇌B is schematically plotted against the reaction coordinates. The plots in the presence and absence of a catalyst are shown in dashed and solid lines, respectively. Identify the correct plot for the reaction: