46295 + Interview Questions in Chemistry

1.	What do you understand by (i) electron - deficient, (ii) electron - precise, and (iii) electronrich compounds of hydrogen? Provide justification with suitable examples.
Answer» What do you understand by (i) electron - deficient, (ii) electron - precise, and (iii) electronrich compounds of hydrogen? Provide justification with suitable examples.

Discussion

2.	23. In the complex [Cr(O 2 )(N H3)4 ] ( H2O ) ] Cl2 , O2 will be in the form of 1. peroxo 2. dioxo 3. superoxo 4. oxo
Answer» 23. In the complex [Cr(O 2 )(N H3)4 ] ( H2O ) ] Cl2 , O2 will be in the form of 1. peroxo 2. dioxo 3. superoxo 4. oxo

Discussion

3.	In law of reciprocal proportions, if we take carbon monoxide (CO) and methane(CH4), what would be the product when hydrogen and oxygen combine?
Answer» In law of reciprocal proportions, if we take carbon monoxide (CO) and methane(CH4), what would be the product when hydrogen and oxygen combine?

Discussion

4.	31.If 18g water contains N atoms of Hydrogen than 54g water contains how many atoms of hydrogen.
Answer» 31.If 18g water contains N atoms of Hydrogen than 54g water contains how many atoms of hydrogen.

Discussion

5.	Free radicals contain odd no. of electron but why are they still electrically nuetral?
Answer» Free radicals contain odd no. of electron but why are they still electrically nuetral?

Discussion

6.	When 5 ml of a 1 MHCI solution is mixed with5 ml of 0.1 M NaOH solution, temperature ofsolution increased by 2^° C. Which of the followingcan be predicted accurately from this observation?(1) If 10 mL of same HCI is mixed with 10 mL ofsame NaOH, temperature rise will be 4^° C(2) If 10 mL of 0.05 M HCI is mixed with 10 mL of0.05 M NaCl, temperature rise will be 2^° 0C(3) if 5 mL of 0.1 M HCI is mixed with 5 mL of0.1 M NH3 solution, the temperature rise will bemore than 2^° C(4) If 5 mL of 0.1 M CH3COOH is mixed with 5 mLof 0.1 M NaOH, the temperature rise will beless than 2^° C
Answer» When 5 ml of a 1 MHCI solution is mixed with5 ml of 0.1 M NaOH solution, temperature ofsolution increased by 2^° C. Which of the followingcan be predicted accurately from this observation?(1) If 10 mL of same HCI is mixed with 10 mL ofsame NaOH, temperature rise will be 4^° C(2) If 10 mL of 0.05 M HCI is mixed with 10 mL of0.05 M NaCl, temperature rise will be 2^° 0C(3) if 5 mL of 0.1 M HCI is mixed with 5 mL of0.1 M NH3 solution, the temperature rise will bemore than 2^° C(4) If 5 mL of 0.1 M CH3COOH is mixed with 5 mLof 0.1 M NaOH, the temperature rise will beless than 2^° C

Discussion

7.	1gm. Sample of Mgco3 is completely neutralise by n10 HCL (150ml.) .calculate the percentage purity of sample
Answer» 1gm. Sample of Mgco3 is completely neutralise by n10 HCL (150ml.) .calculate the percentage purity of sample

Discussion

8.	63.A vessel contains a non linear triatomic gas if 50% of gas dissociates into individual atom then find the new value of degree of freedom by ignoring the vibrational mode and any further dissociation. A 2.15 B 3.75 C 5.25 D 6.35
Answer» 63.A vessel contains a non linear triatomic gas if 50% of gas dissociates into individual atom then find the new value of degree of freedom by ignoring the vibrational mode and any further dissociation. A 2.15 B 3.75 C 5.25 D 6.35

Discussion

9.	Which of the following is not a p-block element?
Answer» Which of the following is not a p-block element?

Discussion

10.	Write down the IUPAC name for each of the following complexes andindicate the oxidation state, electronic configuration andcoordination number. Also give stereochemistry and magnetic moment ofthe complex:(i) K[Cr(H2O)2(C2O4)2].3H2O(ii) [Co(NH3)5Cl]Cl2 (iii) CrCl3(py)3(iv) Cs[FeCl4](v) K4[Mn(CN)6]
Answer» Write down the IUPAC name for each of the following complexes and indicate the oxidation state, electronic configuration and coordination number. Also give stereochemistry and magnetic moment of the complex: (i) K[Cr(H₂O)₂(C₂O₄)₂].3H₂O (ii) [Co(NH₃)₅Cl]Cl₂ (iii) CrCl₃(py)₃ (iv) Cs[FeCl₄] (v) K₄[Mn(CN)₆]

10.

Write down the IUPAC name for each of the following complexes andindicate the oxidation state, electronic configuration andcoordination number. Also give stereochemistry and magnetic moment ofthe complex:(i) K[Cr(H2O)2(C2O4)2].3H2O(ii) [Co(NH3)5Cl]Cl2 (iii) CrCl3(py)3(iv) Cs[FeCl4](v) K4[Mn(CN)6]

Answer»

Write down the IUPAC name for each of the following complexes and
indicate the oxidation state, electronic configuration and
coordination number. Also give stereochemistry and magnetic moment of
the complex:

(i) K[Cr(H₂O)₂(C₂O₄)₂].3H₂O

(ii) [Co(NH₃)₅Cl]Cl₂

(iii) CrCl₃(py)₃

(iv) Cs[FeCl₄]

(v) K₄[Mn(CN)₆]

Discussion

11.	In H2O2 molecule, the O—O bond length is
Answer» In $H_{2} O_{2}$ molecule, the O—O bond length is

Discussion

12.	A(g)+B(g)⇋C(g)+D(g) △G0=2763.6 cal. when two mol of each A and B are present initially and the mixture attains an equilibrium at 300 K, the equilibrium concentration ratio of C to A is .
Answer» $A (g) + B (g) ⇋ C (g) + D (g) △ G^{0} = 2763.6 c a l .$ when two mol of each A and B are present initially and the mixture attains an equilibrium at $300 K$ , the equilibrium concentration ratio of C to A is .

Discussion

13.	IUPAC name of the compound C(CCl3)4
Answer» IUPAC name of the compound $C {(C {C l}_{3})}_{4}$

Discussion

14.	What volume at STP of CO is required to reduce one mole of Fe2O3 in the following reaction Fe2O3 + CO = Fe + CO2
Answer» What volume at STP of CO is required to reduce one mole of Fe2O3 in the following reaction Fe2O3 + CO = Fe + CO2

Discussion

15.	The wave number of the limiting line of Balmer series of hydrogen spectrum is
Answer» The wave number of the limiting line of Balmer series of hydrogen spectrum is

Discussion

16.	Theequilibrium constant expression for a gas reaction is,Writethe balanced chemical equation corresponding to this expression.
Answer» The equilibrium constant expression for a gas reaction is, Write the balanced chemical equation corresponding to this expression.

16.

Theequilibrium constant expression for a gas reaction is,Writethe balanced chemical equation corresponding to this expression.

Answer»

The
equilibrium constant expression for a gas reaction is,

Write
the balanced chemical equation corresponding to this expression.

Discussion

17.	Using the data (all values in kilocalorie per mole at 25°C). Given below, calculate the bond energy of C-C and C-H bonds. ∆H0(combustion of ethane) = -372.0 ∆H0(combustion of propane) = -530.0 ∆H0 for C (graphite) → C (g) = +172.0 Bond energy of H–H Bond =+104.0; ∆H0 of H2 O(l)= -68.0 ∆H0f of CO2 (g)= -94.0
Answer» Using the data (all values in kilocalorie per mole at 25°C). Given below, calculate the bond energy of C-C and C-H bonds. ∆H0(combustion of ethane) = -372.0 ∆H0(combustion of propane) = -530.0 ∆H0 for C (graphite) → C (g) = +172.0 Bond energy of H–H Bond =+104.0; ∆H0 of H2 O(l)= -68.0 ∆H0f of CO2 (g)= -94.0

Discussion

18.	why pressurremain cons†an t during the eqillubrium state where liquid and vapour both exist but the volume decreases n andrewi experiment i wamt to know whem the pressure reamin constamt
Answer» why pressurremain cons†an t during the eqillubrium state where liquid and vapour both exist but the volume decreases n andrewi experiment i wamt to know whem the pressure reamin constamt

Discussion

19.	Which of the following statements about the biological effects of radiation is false?
Answer» Which of the following statements about the biological effects of radiation is false?

Discussion

20.	ntAn aqueous solution has 5 percent urea and 10percent glucose by weight .what will be the freezing point of this solution?kf of water=1.86kkg/moln
Answer» ntAn aqueous solution has 5 percent urea and 10percent glucose by weight .what will be the freezing point of this solution?kf of water=1.86kkg/moln

Discussion

21.	Which one of the following reaction is an example of calcination process?
Answer» Which one of the following reaction is an example of calcination process?

Discussion

22.	Quartz is:
Answer» Quartz is:

Discussion

23.	What is the basic structural difference between starch and cellulose?
Answer» What is the basic structural difference between starch and cellulose?

Discussion

24.	Which of the following combinations of ions will have the highest polarisation?
Answer» Which of the following combinations of ions will have the highest polarisation?

Discussion

25.	What is Sulphur containing Amino Acids?
Answer» What is Sulphur containing Amino Acids?

Discussion

26.	26.What is compound
Answer» 26.What is compound

Discussion

27.	The density of body-centred unit cell having edge length 190 pm is 8.2 g cm–3. The mass of atom in the unit cell isOptions:1] 20.12] Should have chosen- 16.93] 40.54] Wrong- 33.5WE HAVE TO FIND M/NA OR ONLY M?NA= 6.022* 10^23
Answer» The density of body-centred unit cell having edge length 190 pm is 8.2 g cm–3. The mass of atom in the unit cell is Options: 1] 20.1 2] Should have chosen- 16.9 3] 40.5 4] Wrong- 33.5 WE HAVE TO FIND M/NA OR ONLY M? NA= 6.022* 10^23

Discussion

28.	why is probability density of finding electron maximum at nucleus although nodal plane passes through the centre?
Answer» why is probability density of finding electron maximum at nucleus although nodal plane passes through the centre?

Discussion

29.	Why S-S bond energy is higher than O-O bond energy?
Answer» Why S-S bond energy is higher than O-O bond energy?

Discussion

30.	Mole fraction of methanol is 0.02 in an aq. solution and density of solution is 0.994 gm cm^3. Molality will be(1) 1.13(2) 11.3(3) 2.26(4) None
Answer» Mole fraction of methanol is 0.02 in an aq. solution and density of solution is 0.994 gm cm^3. Molality will be(1) 1.13(2) 11.3(3) 2.26(4) None

Discussion

31.	1 g of metal hydroxide gives x g of the metal oxide then equivalent weight of metal i
Answer» 1 g of metal hydroxide gives x g of the metal oxide then equivalent weight of metal i

Discussion

32.	The vapour pressure of an aqueous solution is found to be 750 torr at certain temperature ′T′. If ′T′ is the temperature at which pure water boils under atmospheric pressure and same solution show elevation in boiling point ΔTb=1.04 K, find the atmospheric pressure (Kb=0.52 k kg mol−1)
Answer» The vapour pressure of an aqueous solution is found to be $750 torr$ at certain temperature $^{'} T^{'}$ . If $^{'} T^{'}$ is the temperature at which pure water boils under atmospheric pressure and same solution show elevation in boiling point $Δ T_{b} = 1.04 K$ , find the atmospheric pressure $(K_{b} = 0.52 {k kg mol}^{- 1})$

Discussion

33.	Which of the following gases acts as a reducing agent?
Answer» Which of the following gases acts as a reducing agent?

Discussion

34.	Which of the following exhibit the weakest intermolecular forces
Answer» Which of the following exhibit the weakest intermolecular forces

34.

Which of the following exhibit the weakest intermolecular forces

Answer»

Which of the following exhibit the weakest intermolecular forces

Discussion

35.	The species x^{2^+} has electronic configuration 1S^22S^22P^63S^23P^63D^9 how to find atomic number of this species?
Answer» The species x^{2^+} has electronic configuration 1S^22S^22P^63S^23P^63D^9 how to find atomic number of this species?

Discussion

36.	On removing 3/4 moles of electron from 1 moles sample of electron the percentage decrease in charge?
Answer» On removing 3/4 moles of electron from 1 moles sample of electron the percentage decrease in charge?

Discussion

37.	If the solubility of lithium sodium hexafluoroaluminate, Li3Na3(AlF6)2 is 's' mol L−1, its solubility product is equal to -
Answer» If the solubility of lithium sodium hexafluoroaluminate, $L i_{3} N a_{3} (A l F_{6})_{2}$ is 's' $m o l L^{- 1}$ , its solubility product is equal to -

Discussion

38.	Number of carbonyl compounds with molecular formula C5H10O which give racemic mixture of secondary alcohol with Grignard reagent
Answer» Number of carbonyl compounds with molecular formula C5H10O which give racemic mixture of secondary alcohol with Grignard reagent

Discussion

39.	ntphoton and electron are given same energy . the wavelength associated with it are related asn nt1wavelength of photon is greater than electronn nt2 wavelength of photon is less than electronn ntn ntn
Answer» ntphoton and electron are given same energy . the wavelength associated with it are related asn nt1wavelength of photon is greater than electronn nt2 wavelength of photon is less than electronn ntn ntn

Discussion

40.	Q 39/75 Calculate the percentage of water of crystalline in Blue vitrial (CuSO4.5H20) (Atomic masses are given as Cu = 63.5S 32, O 16, H = 1) 7.2% 36% 56.42% 64%
Answer» Q 39/75 Calculate the percentage of water of crystalline in Blue vitrial (CuSO4.5H20) (Atomic masses are given as Cu = 63.5S 32, O 16, H = 1) 7.2% 36% 56.42% 64%

Discussion

41.	What is difference between covalency and oxidation state ??
Answer» What is difference between covalency and oxidation state ??

Discussion

42.	if equivalent weight of an unknown trivalent metal oxide is 24. find molecular weight of chloride formed by this metal
Answer» if equivalent weight of an unknown trivalent metal oxide is 24. find molecular weight of chloride formed by this metal

Discussion

43.	How many covalent bonds are formed in Cl2, O2 and N2 molecules?
Answer» How many covalent bonds are formed in $C l_{2,} O_{2}$ and $N_{2}$ molecules?

Discussion

44.	if calcium flouride having the flouride structure the coordination number for calcium ion Ca2+ and flouride ion F- are
Answer» if calcium flouride having the flouride structure the coordination number for calcium ion Ca2+ and flouride ion F- are

Discussion

45.	Which of the following is/are used as a bleaching agent(s)?
Answer» Which of the following is/are used as a bleaching agent(s)?

Discussion

46.	is an example of which of the following types of reactions [AFMC 1997; CPMT 1999]
Answer» is an example of which of the following types of reactions [AFMC 1997; CPMT 1999]

Discussion

47.	Which alkanes on ozonolysis give CH3CH2CHO and CH3COCH3
Answer» Which alkanes on ozonolysis give $C H_{3} C H_{2} C H O$ and $C H_{3} C O C H_{3}$

Discussion

48.	What is mercury and where does it come from?
Answer» What is mercury and where does it come from?

Discussion

49.	The factor not affecting ionisation enthalpy is?
Answer» The factor not affecting ionisation enthalpy is?

Discussion

50.	Binary liquid mixtures which exhibit positive deviations from Raoult's law boil at temperature ______ than the expected boiling point:
Answer» Binary liquid mixtures which exhibit positive deviations from Raoult's law boil at temperature ______ than the expected boiling point:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What do you understand by (i) electron - deficient, (ii) electron - precise, and (iii) electronrich compounds of hydrogen? Provide justification with suitable examples.

23. In the complex [Cr(O 2 )(N H3)4 ] ( H2O ) ] Cl2 , O2 will be in the form of 1. peroxo 2. dioxo 3. superoxo 4. oxo

In law of reciprocal proportions, if we take carbon monoxide (CO) and methane(CH4), what would be the product when hydrogen and oxygen combine?

31.If 18g water contains N atoms of Hydrogen than 54g water contains how many atoms of hydrogen.

Free radicals contain odd no. of electron but why are they still electrically nuetral?

1gm. Sample of Mgco3 is completely neutralise by n10 HCL (150ml.) .calculate the percentage purity of sample

63.A vessel contains a non linear triatomic gas if 50% of gas dissociates into individual atom then find the new value of degree of freedom by ignoring the vibrational mode and any further dissociation. A 2.15 B 3.75 C 5.25 D 6.35

Which of the following is not a p-block element?

Write down the IUPAC name for each of the following complexes andindicate the oxidation state, electronic configuration andcoordination number. Also give stereochemistry and magnetic moment ofthe complex:(i) K[Cr(H2O)2(C2O4)2].3H2O(ii) [Co(NH3)5Cl]Cl2 (iii) CrCl3(py)3(iv) Cs[FeCl4](v) K4[Mn(CN)6]

In H2O2 molecule, the O—O bond length is

A(g)+B(g)⇋C(g)+D(g) △G0=2763.6 cal. when two mol of each A and B are present initially and the mixture attains an equilibrium at 300 K, the equilibrium concentration ratio of C to A is .

IUPAC name of the compound C(CCl3)4

What volume at STP of CO is required to reduce one mole of Fe2O3 in the following reaction Fe2O3 + CO = Fe + CO2

The wave number of the limiting line of Balmer series of hydrogen spectrum is

Theequilibrium constant expression for a gas reaction is,Writethe balanced chemical equation corresponding to this expression.

why pressurremain cons†an t during the eqillubrium state where liquid and vapour both exist but the volume decreases n andrewi experiment i wamt to know whem the pressure reamin constamt

Which of the following statements about the biological effects of radiation is false?

ntAn aqueous solution has 5 percent urea and 10percent glucose by weight .what will be the freezing point of this solution?kf of water=1.86kkg/moln

Which one of the following reaction is an example of calcination process?

Quartz is:

What is the basic structural difference between starch and cellulose?

Which of the following combinations of ions will have the highest polarisation?

What is Sulphur containing Amino Acids?

26.What is compound

The density of body-centred unit cell having edge length 190 pm is 8.2 g cm–3. The mass of atom in the unit cell isOptions:1] 20.12] Should have chosen- 16.93] 40.54] Wrong- 33.5WE HAVE TO FIND M/NA OR ONLY M?NA= 6.022* 10^23

why is probability density of finding electron maximum at nucleus although nodal plane passes through the centre?

Why S-S bond energy is higher than O-O bond energy?

Mole fraction of methanol is 0.02 in an aq. solution and density of solution is 0.994 gm cm^3. Molality will be(1) 1.13(2) 11.3(3) 2.26(4) None

1 g of metal hydroxide gives x g of the metal oxide then equivalent weight of metal i

The vapour pressure of an aqueous solution is found to be 750 torr at certain temperature ′T′. If ′T′ is the temperature at which pure water boils under atmospheric pressure and same solution show elevation in boiling point ΔTb=1.04 K, find the atmospheric pressure (Kb=0.52 k kg mol−1)

Which of the following gases acts as a reducing agent?

Which of the following exhibit the weakest intermolecular forces

The species x^{2^+} has electronic configuration 1S^22S^22P^63S^23P^63D^9 how to find atomic number of this species?

On removing 3/4 moles of electron from 1 moles sample of electron the percentage decrease in charge?

If the solubility of lithium sodium hexafluoroaluminate, Li3Na3(AlF6)2 is 's' mol L−1, its solubility product is equal to -

Number of carbonyl compounds with molecular formula C5H10O which give racemic mixture of secondary alcohol with Grignard reagent

ntphoton and electron are given same energy . the wavelength associated with it are related asn nt1wavelength of photon is greater than electronn nt2 wavelength of photon is less than electronn ntn ntn

Q 39/75 Calculate the percentage of water of crystalline in Blue vitrial (CuSO4.5H20) (Atomic masses are given as Cu = 63.5S 32, O 16, H = 1) 7.2% 36% 56.42% 64%

What is difference between covalency and oxidation state ??

if equivalent weight of an unknown trivalent metal oxide is 24. find molecular weight of chloride formed by this metal

How many covalent bonds are formed in Cl2, O2 and N2 molecules?

if calcium flouride having the flouride structure the coordination number for calcium ion Ca2+ and flouride ion F- are

Which of the following is/are used as a bleaching agent(s)?

is an example of which of the following types of reactions [AFMC 1997; CPMT 1999]

Which alkanes on ozonolysis give CH3CH2CHO and CH3COCH3

What is mercury and where does it come from?

The factor not affecting ionisation enthalpy is?

Binary liquid mixtures which exhibit positive deviations from Raoult's law boil at temperature ______ than the expected boiling point: