46295 + Interview Questions in Chemistry

1.	A metal forms two oxides.The higher oxide contains 80% metal. 0.72 g of the lower oxide gave 0.8 g of higher oxide when oxidised.Then the ratio of the weight of oxygen that combines with the fixed weight of metal in the two oxides will be?
Answer» A metal forms two oxides.The higher oxide contains 80% metal. 0.72 g of the lower oxide gave 0.8 g of higher oxide when oxidised.Then the ratio of the weight of oxygen that combines with the fixed weight of metal in the two oxides will be?

Discussion

2.	The correct order of increasing X−O−X bond angle is (X=H,F or Cl):
Answer» The correct order of increasing $X - O - X$ bond angle is $(X = H, F or C l)$ :

Discussion

3.	36. Ethylene reacts with S_2CI_{} to give
Answer» 36. Ethylene reacts with S_2CI_{} to give

Discussion

4.	what is the s†an dard heat of reaction for C2H6+O2=CO2+H2O if s†an dard heat of combustion of C and H2 are 393.5and 285KJ per mole res.and s†an dard heatof fomation of C2H6 is 88.2KJ er
Answer» what is the s†an dard heat of reaction for C2H6+O2=CO2+H2O if s†an dard heat of combustion of C and H2 are 393.5and 285KJ per mole res.and s†an dard heatof fomation of C2H6 is 88.2KJ er

Discussion

5.	Difference between organic and inorganic
Answer» Difference between organic and inorganic

Discussion

6.	Pick an ether which cannot be prepared by direct Williamson's synthesis:
Answer» Pick an ether which cannot be prepared by direct Williamson's synthesis:

Discussion

7.	How molecular wgt differ from eqvlnt wgt?
Answer» How molecular wgt differ from eqvlnt wgt?

Discussion

8.	The number of isomers for the compound with molecular formula C2BrClFI is:
Answer» The number of isomers for the compound with molecular formula $C_{2} B r C l F I$ is:

Discussion

9.	The energy of an electron in the first Bohr orbit of H - atom is - 13.6 eV. Then, which of the following statement(s) is/are correct for He+ ?
Answer» The energy of an electron in the first Bohr orbit of H - atom is - 13.6 eV. Then, which of the following statement(s) is/are correct for $H e^{+}$ ?

Discussion

10.	Arrange according to their stability order1. A 3 degree carbonation2. A 3 degree carboanion 3. A 3 degree free radical
Answer» Arrange according to their stability order 1. A 3 degree carbonation 2. A 3 degree carboanion 3. A 3 degree free radical

Discussion

11.	Crystalline solids may be anisotropic due to the arrangement of their constituent particles but how are amorphous solids isotropic in nature?
Answer» Crystalline solids may be anisotropic due to the arrangement of their constituent particles but how are amorphous solids isotropic in nature?

Discussion

12.	Which of the following is not correct?
Answer» Which of the following is not correct?

Discussion

13.	Calamine is an ore of
Answer» Calamine is an ore of

Discussion

14.	In ammonia the oxidation number of N is:
Answer» In ammonia the oxidation number of N is:

Discussion

15.	Plz suggest a way how i can convert telephonic waves into energy and store it practically.
Answer» Plz suggest a way how i can convert telephonic waves into energy and store it practically.

Discussion

16.	Consider the following intramolecular aldol condensation reaction:X is:
Answer» Consider the following intramolecular aldol condensation reaction: $X$ is:

Discussion

17.	Which of the following cannot show linkage isomerism ?
Answer» Which of the following cannot show linkage isomerism ?

Discussion

18.	If one mole of a polyatomic gas has two vibrational modes and β is the ratio of molar specific heats for polyatomic gas. β=CpCv, then the value of β is :
Answer» If one mole of a polyatomic gas has two vibrational modes and $β$ is the ratio of molar specific heats for polyatomic gas. $β = \frac{C_{p}}{C_{v}}$ , then the value of $β$ is :

Discussion

19.	A, B and C are the elements of the same period in the long form of the periodic table. Oxide of A amphoteric, B is acidic and C is basic. The increasing order of atomic numbers of the elements is
Answer» A, B and C are the elements of the same period in the long form of the periodic table. Oxide of A amphoteric, B is acidic and C is basic. The increasing order of atomic numbers of the elements is

Discussion

20.	Find the ratio of em of an alpha particle to to that of a neutron.
Answer» Find the ratio of $\frac{e}{m}$ of an alpha particle to to that of a neutron.

Discussion

21.	Write the formula for the coordination compounds: mercury tetrathiocyanato cobaltate (III)
Answer» Write the formula for the coordination compounds: mercury tetrathiocyanato cobaltate (III)

21.

Write the formula for the coordination compounds: mercury tetrathiocyanato cobaltate (III)

Answer»

Write the formula for the coordination compounds:

mercury tetrathiocyanato cobaltate (III)

Discussion

22.	31% w/w H3BO3 solution has density 1.1 g/mL. The normality of the solution is (Atomic mass of B = 11)
Answer» 31% w/w H3BO3 solution has density 1.1 g/mL. The normality of the solution is (Atomic mass of B = 11)

Discussion

23.	What would be the sum of the number of π − bonds in the following molecules: I. H2S2O6 II. H2SO3 III. H2S2O5
Answer» What would be the sum of the number of $π$ − bonds in the following molecules: $I . H_{2} S_{2} O_{6} I I . H_{2} S O_{3} I I I . H_{2} S_{2} O_{5}$

Discussion

24.	50 ml of H2 gas difusses through a samll hole vessel in 20 min . time taken by 40 ml of a diffusion under similar condition
Answer» 50 ml of H2 gas difusses through a samll hole vessel in 20 min . time taken by 40 ml of a diffusion under similar condition

Discussion

25.	1 mole of K S O 2 2 8 and 2 mole of KI gives 2 moles of K SO 2 4 and 1 mole of I2, so the stoicheometry will be 1 : 2. how?
Answer» 1 mole of K S O 2 2 8 and 2 mole of KI gives 2 moles of K SO 2 4 and 1 mole of I2, so the stoicheometry will be 1 : 2. how?

Discussion

26.	Chemistry is the branch of science that studies:
Answer» Chemistry is the branch of science that studies:

Discussion

27.	[Hg(NH3)4] [Co(NCS)4] complex has(1)EAN of Hg+2 is 86 and Co+2 is 33(2)EAN of Hg+2 is 86 and Co+2 is 36(3)EAN of Hg+2 is 84 and Co+2 is 36(4)EAN of Hg+2 is zero and Co+2 is 33
Answer» [Hg(NH3)4] [Co(NCS)4] complex has (1)EAN of Hg+2 is 86 and Co+2 is 33 (2)EAN of Hg+2 is 86 and Co+2 is 36 (3)EAN of Hg+2 is 84 and Co+2 is 36 (4)EAN of Hg+2 is zero and Co+2 is 33

Discussion

28.	According to the Avogadro's law, equal volumes of gases at the same temperature and pressure should contain:
Answer» According to the Avogadro's law, equal volumes of gases at the same temperature and pressure should contain:

Discussion

29.	What is tbe meaning of quantisation or being quantised ? When do we say energy is quantised ?
Answer» What is tbe meaning of quantisation or being quantised ? When do we say energy is quantised ?

Discussion

30.	what is hydrogen bonded molecular solids?
Answer» what is hydrogen bonded molecular solids?

Discussion

31.	The capacity of an ion to coagulate a colloidal solution depends on:
Answer» The capacity of an ion to coagulate a colloidal solution depends on:

Discussion

32.	Explain the preparation of K2Cr2O7 from chromite ore and write the chemical equations involved?
Answer» Explain the preparation of K2Cr2O7 from chromite ore and write the chemical equations involved?

Discussion

33.	Brown sugar is
Answer» Brown sugar is

Discussion

34.	14) Which of the following shows only one brominatedcompounda) Butene-2d) Butanol-3b) 2,2-dimethylpropanec) Butyne-1
Answer» 14) Which of the following shows only one brominatedcompounda) Butene-2d) Butanol-3b) 2,2-dimethylpropanec) Butyne-1

Discussion

35.	For the flow of electricity through gases , they should be better exposed to some high energy radiations like X-RAY. Why?
Answer» For the flow of electricity through gases , they should be better exposed to some high energy radiations like X-RAY. Why?

Discussion

36.	In metal deficiency defect, will there be change in colour??
Answer» In metal deficiency defect, will there be change in colour??

Discussion

37.	Which is the correct order of increasing energy of the listed orbitals in the atom of titanium?(Atomic no. Z=22)
Answer» Which is the correct order of increasing energy of the listed orbitals in the atom of titanium? (Atomic no. Z=22)

Discussion

38.	why Raoult's law is not applicable for concentrated solutions
Answer» why Raoult's law is not applicable for concentrated solutions

Discussion

39.	how much water should be added to 300ml of decimormal HCl solution to make it 0.001
Answer» how much water should be added to 300ml of decimormal HCl solution to make it 0.001

Discussion

40.	The priority sequence of the following substituent according to E-Z system of nomenclature is? -C≡CH; -C (CH3)3; -CH= CH2; -CH(CH3)2 I II III IV
Answer» The priority sequence of the following substituent according to E-Z system of nomenclature is? -C≡CH; -C (CH₃)₃; -CH= CH₂; -CH(CH₃)₂ I II III IV

40.

The priority sequence of the following substituent according to E-Z system of nomenclature is? -C≡CH; -C (CH3)3; -CH= CH2; -CH(CH3)2 I II III IV

Answer»

The priority sequence of the following substituent according to E-Z system of nomenclature is?

-C≡CH; -C (CH₃)₃; -CH= CH₂; -CH(CH₃)₂

I II III IV

Discussion

41.	Identify “Z” in the following reaction series : RCH2OHK2Cr2O7−−−−−−−−→Conc.H2SO4(X)NH3−−−→Δ(Y)H2−→Ni(Z)
Answer» Identify “Z” in the following reaction series : $R C H_{2} O H K_{2} C r_{2} O_{7} - ------- \to C o n c . H_{2} S O_{4} (X) N H_{3} - -- \to Δ (Y) H_{2} - \to N i (Z)$

Discussion

42.	77.Ppm is defined as number of parts by mass of a solute present in per million parts of solution
Answer» 77.Ppm is defined as number of parts by mass of a solute present in per million parts of solution

Discussion

43.	neopentyl group is a (1)1degree alkyl group(2)2degree alkyl group(3)3degree alkyl group (4)iso alkyl group
Answer» neopentyl group is a (1)1degree alkyl group (2)2degree alkyl group (3)3degree alkyl group (4)iso alkyl group

Discussion

44.	In dehydroha\log enation,hydrogen and ha\log en are removed from which carbons
Answer» In dehydroha\log enation,hydrogen and ha\log en are removed from which carbons

Discussion

45.	Classify each of the following on the basis of their atomicity(a) F2 (b) NO2 (c) N2O (d) C2H6 (e) P4 (f) H2O2(g) P4O10 (h) O3 (i) HCI (j) CH4 (k) He (l) Ag
Answer» Classify each of the following on the basis of their atomicity (a) $F_{2}$ (b) $N O_{2}$ (c) $N_{2} O$ (d) $C_{2} H_{6}$ (e) $P_{4}$ (f) $H_{2} O_{2}$ (g) $P_{4} O_{10}$ (h) $O_{3}$ (i) $H C I$ (j) $C H_{4}$ (k) $H e$ (l) $A g$

Discussion

46.	The functional group in methanol and methanal respectively are :
Answer» The functional group in methanol and methanal respectively are :

Discussion

47.	The heat evolved when 0.25 mole of hydrochloric acid in solution is neutralized by 0.25 mole of Sodium hydroxide solution is :
Answer» The heat evolved when 0.25 mole of hydrochloric acid in solution is neutralized by 0.25 mole of Sodium hydroxide solution is :

Discussion

48.	69.Heat of neutralisation of oxalic acid is -53.35 KJ/g.eq using NaOH. Calculate the volume of delta(H) for the given reaction H2C2O4=====>C2O4 +2H
Answer» 69.Heat of neutralisation of oxalic acid is -53.35 KJ/g.eq using NaOH. Calculate the volume of delta(H) for the given reaction H2C2O4=====>C2O4 +2H

Discussion

49.	Which is not a process of purification of colloidal Solutions?
Answer» Which is not a process of purification of colloidal Solutions?

Discussion

50.	Of the given anions, the strongest Bronsted base is
Answer» Of the given anions, the strongest Bronsted base is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A metal forms two oxides.The higher oxide contains 80% metal. 0.72 g of the lower oxide gave 0.8 g of higher oxide when oxidised.Then the ratio of the weight of oxygen that combines with the fixed weight of metal in the two oxides will be?

The correct order of increasing X−O−X bond angle is (X=H,F or Cl):

36. Ethylene reacts with S_2CI_{} to give

what is the s†an dard heat of reaction for C2H6+O2=CO2+H2O if s†an dard heat of combustion of C and H2 are 393.5and 285KJ per mole res.and s†an dard heatof fomation of C2H6 is 88.2KJ er

Difference between organic and inorganic

Pick an ether which cannot be prepared by direct Williamson's synthesis:

How molecular wgt differ from eqvlnt wgt?

The number of isomers for the compound with molecular formula C2BrClFI is:

The energy of an electron in the first Bohr orbit of H - atom is - 13.6 eV. Then, which of the following statement(s) is/are correct for He+ ?

Arrange according to their stability order1. A 3 degree carbonation2. A 3 degree carboanion 3. A 3 degree free radical

Crystalline solids may be anisotropic due to the arrangement of their constituent particles but how are amorphous solids isotropic in nature?

Which of the following is not correct?

Calamine is an ore of

In ammonia the oxidation number of N is:

Plz suggest a way how i can convert telephonic waves into energy and store it practically.

Consider the following intramolecular aldol condensation reaction:X is:

Which of the following cannot show linkage isomerism ?

If one mole of a polyatomic gas has two vibrational modes and β is the ratio of molar specific heats for polyatomic gas. β=CpCv, then the value of β is :

A, B and C are the elements of the same period in the long form of the periodic table. Oxide of A amphoteric, B is acidic and C is basic. The increasing order of atomic numbers of the elements is

Find the ratio of em of an alpha particle to to that of a neutron.

Write the formula for the coordination compounds: mercury tetrathiocyanato cobaltate (III)

31% w/w H3BO3 solution has density 1.1 g/mL. The normality of the solution is (Atomic mass of B = 11)

What would be the sum of the number of π − bonds in the following molecules: I. H2S2O6 II. H2SO3 III. H2S2O5

50 ml of H2 gas difusses through a samll hole vessel in 20 min . time taken by 40 ml of a diffusion under similar condition

1 mole of K S O 2 2 8 and 2 mole of KI gives 2 moles of K SO 2 4 and 1 mole of I2, so the stoicheometry will be 1 : 2. how?

Chemistry is the branch of science that studies:

[Hg(NH3)4] [Co(NCS)4] complex has(1)EAN of Hg+2 is 86 and Co+2 is 33(2)EAN of Hg+2 is 86 and Co+2 is 36(3)EAN of Hg+2 is 84 and Co+2 is 36(4)EAN of Hg+2 is zero and Co+2 is 33

According to the Avogadro's law, equal volumes of gases at the same temperature and pressure should contain:

What is tbe meaning of quantisation or being quantised ? When do we say energy is quantised ?

what is hydrogen bonded molecular solids?

The capacity of an ion to coagulate a colloidal solution depends on:

Explain the preparation of K2Cr2O7 from chromite ore and write the chemical equations involved?

Brown sugar is

14) Which of the following shows only one brominatedcompounda) Butene-2d) Butanol-3b) 2,2-dimethylpropanec) Butyne-1

For the flow of electricity through gases , they should be better exposed to some high energy radiations like X-RAY. Why?

In metal deficiency defect, will there be change in colour??

Which is the correct order of increasing energy of the listed orbitals in the atom of titanium?(Atomic no. Z=22)

why Raoult's law is not applicable for concentrated solutions

how much water should be added to 300ml of decimormal HCl solution to make it 0.001

The priority sequence of the following substituent according to E-Z system of nomenclature is? -C≡CH; -C (CH3)3; -CH= CH2; -CH(CH3)2 I II III IV

Identify “Z” in the following reaction series : RCH2OHK2Cr2O7−−−−−−−−→Conc.H2SO4(X)NH3−−−→Δ(Y)H2−→Ni(Z)

77.Ppm is defined as number of parts by mass of a solute present in per million parts of solution

neopentyl group is a (1)1degree alkyl group(2)2degree alkyl group(3)3degree alkyl group (4)iso alkyl group

In dehydroha\log enation,hydrogen and ha\log en are removed from which carbons

Classify each of the following on the basis of their atomicity(a) F2 (b) NO2 (c) N2O (d) C2H6 (e) P4 (f) H2O2(g) P4O10 (h) O3 (i) HCI (j) CH4 (k) He (l) Ag

The functional group in methanol and methanal respectively are :

The heat evolved when 0.25 mole of hydrochloric acid in solution is neutralized by 0.25 mole of Sodium hydroxide solution is :

69.Heat of neutralisation of oxalic acid is -53.35 KJ/g.eq using NaOH. Calculate the volume of delta(H) for the given reaction H2C2O4=====>C2O4 +2H

Which is not a process of purification of colloidal Solutions?

Of the given anions, the strongest Bronsted base is