46295 + Interview Questions in Chemistry

1.	The elements which occupy the peaks of ionization energy curve are
Answer» The elements which occupy the peaks of ionization energy curve are

1.

The elements which occupy the peaks of ionization energy curve are

Answer»

The elements which occupy the peaks of ionization energy curve are

2.	The specific gravity of a HNO_3 solution is 1.42 and it is 70% w/w. The molar concentration of HNO_3 is (1) 15.8 (2) 31.6 (3) 11.1 (4) 14.2
Answer» The specific gravity of a HNO_3 solution is 1.42 and it is 70% w/w. The molar concentration of HNO_3 is (1) 15.8 (2) 31.6 (3) 11.1 (4) 14.2

Discussion

3.	Is there any lower limit to the electric forces between two particles placed at a separation of 1cm?
Answer» Is there any lower limit to the electric forces between two particles placed at a separation of 1cm?

Discussion

4.	why the boiling point of hydrides of carbon family increases
Answer» why the boiling point of hydrides of carbon family increases

Discussion

5.	What happens when a base reacts with a metal
Answer» What happens when a base reacts with a metal

Discussion

6.	surfce of na is illuminated by a light of 6000 a wavelength .work function f sodium is 1.6 ev then minimm kinetic energy of emited electron is
Answer» surfce of na is illuminated by a light of 6000 a wavelength .work function f sodium is 1.6 ev then minimm kinetic energy of emited electron is

Discussion

7.	In H2−O2 fuel cell the reaction occuring at cathode is:
Answer» In $H_{2} - O_{2}$ fuel cell the reaction occuring at cathode is:

Discussion

8.	22.4215g metallic carbonate was heated in a hard glass tube and co2 evolved was found to be measured 1336 ml at 27^° Celsius and 700 mm pressure .what is the equivalent mass of the metal?
Answer» 22.4215g metallic carbonate was heated in a hard glass tube and co2 evolved was found to be measured 1336 ml at 27^° Celsius and 700 mm pressure .what is the equivalent mass of the metal?

Discussion

9.	Order of depression in freezing point of solution vane same concentration of acetic acid trichloroacetic acid trifluoroacetic acid is
Answer» Order of depression in freezing point of solution vane same concentration of acetic acid trichloroacetic acid trifluoroacetic acid is

Discussion

10.	40 Assertion: the decarboxylation of 3- Nitro butanoic acid is difficult than that of 3 -methyl butanoic acid. Reason: the carbanion formed is destabilized in 3-nitro butanoic acid.
Answer» 40 Assertion: the decarboxylation of 3- Nitro butanoic acid is difficult than that of 3 -methyl butanoic acid. Reason: the carbanion formed is destabilized in 3-nitro butanoic acid.

Discussion

11.	95 In the cubic crystal of caesium chloride of density 3.97 grams per centimetre cube the 8 corners are occupied by chloride ions with a Cs+ ion at the centre and vice versa. Calculate the distance between neighbouring caesium and chloride ions. what is the radius ratio of the 2 ions. atomic weight of caesium is 132. 91 and chlorine is 35.45.
Answer» 95 In the cubic crystal of caesium chloride of density 3.97 grams per centimetre cube the 8 corners are occupied by chloride ions with a Cs+ ion at the centre and vice versa. Calculate the distance between neighbouring caesium and chloride ions. what is the radius ratio of the 2 ions. atomic weight of caesium is 132. 91 and chlorine is 35.45.

Discussion

12.	(Q) 0.25 mole of a hydrocarbon requires 0.5 mole of hydrogen for complete saturation. Possible formula of the hydrocarbon is :-(1) C3H8 (2) C3H6 (3) C4H8 (4) C3H4
Answer» (Q) 0.25 mole of a hydrocarbon requires 0.5 mole of hydrogen for complete saturation. Possible formula of the hydrocarbon is :- (1) $C_{3} H_{8}$ (2) $C_{3} H_{6}$ (3) $C_{4} H_{8}$ (4) $C_{3} H_{4}$

12.

(Q) 0.25 mole of a hydrocarbon requires 0.5 mole of hydrogen for complete saturation. Possible formula of the hydrocarbon is :-(1) C3H8 (2) C3H6 (3) C4H8 (4) C3H4

Answer»

(Q) 0.25 mole of a hydrocarbon requires 0.5 mole of hydrogen for complete saturation. Possible formula of the hydrocarbon is :-

(1) $C_{3} H_{8}$

(2) $C_{3} H_{6}$

(3) $C_{4} H_{8}$

(4) $C_{3} H_{4}$

Discussion

13.	Which of the following is most easily cleaved by HBr:
Answer» Which of the following is most easily cleaved by HBr:

Discussion

14.	for Be Z_{eff}=1.95 and for Be^{+X} ,Z_{eff} =2.30. hence ion is
Answer» for Be Z_{eff}=1.95 and for Be^{+X} ,Z_{eff} =2.30. hence ion is

Discussion

15.	if y=log x base 10 then the value ofdy/dx is
Answer» if y=log x base 10 then the value ofdy/dx is

Discussion

16.	what is dative bond
Answer» what is dative bond

Discussion

17.	For the reaction, ΔG0=−42927 joules at 250C.H2(g, 1 atm)+2AgCl(s)⇌2Ag(s)+2H+(aq, 0.1M)+2Cl−(aq, 0.1 M)Calculate the emf of the cell of given reaction.
Answer» For the reaction, $Δ G^{0} = - 42927$ joules at $25^{0} C$ . $H_{2} (g, 1 a t m) + 2 A g C l (s) ⇌ 2 A g (s) + 2 H^{+} (a q, 0.1 M) + 2 C l^{-} (a q, 0.1 M)$ Calculate the emf of the cell of given reaction.

Discussion

18.	38. Balance this reaction by oxidation number method,FeS2+O2=Fe2O3+SO2
Answer» 38. Balance this reaction by oxidation number method,FeS2+O2=Fe2O3+SO2

Discussion

19.	5.Why can't sigma Bond be formed between s-d orbitals or p-d orbitals or d-d orbitals?
Answer» 5.Why can't sigma Bond be formed between s-d orbitals or p-d orbitals or d-d orbitals?

Discussion

20.	The correct IUPAC name for CH2=CH CH2NH CH3 is
Answer» The correct IUPAC name for CH₂=CH CH₂NH CH₃is

Discussion

21.	For the reaction, N2 + 3H2 2NH3, the rate of change of concentration for hydrogen is 4 g/h. The rate of change of concentration of NH3 is
Answer» For the reaction, N2 + 3H2 2NH3, the rate of change of concentration for hydrogen is 4 g/h. The rate of change of concentration of NH3 is

Discussion

22.	During the reaction given belowCO + I2O5 → CO2 + I2What are the equivalent weights of CO and I2O5 if their molar masses are M1 and M2 respectively?
Answer» During the reaction given below CO + I2O5 → CO2 + I2 What are the equivalent weights of CO and I2O5 if their molar masses are M1 and M2 respectively?

Discussion

23.	What is true about the complex tetraammine zinc (II) ion ?
Answer» What is true about the complex tetraammine zinc (II) ion ?

Discussion

24.	Among the following, the strongest base is
Answer» Among the following, the strongest base is

Discussion

25.	The standard enthalpy of formation of CO2 , H2O and glucose at 25 degree celcius are -400 KJ /mol , -300KJ/mol and - 1300 KJ /mol . The standard enthalpy of combustion per gm of glucose is
Answer» The standard enthalpy of formation of CO2 , H2O and glucose at 25 degree celcius are -400 KJ /mol , -300KJ/mol and - 1300 KJ /mol . The standard enthalpy of combustion per gm of glucose is

Discussion

26.	Match the chemical substances in Column – I with type of polymer/ type of bonds in Column - II Columns - IColumn - II(P)Starch(1)Natural Polymer(Q)Protein(2)Synthetic polymer(R)Maltose(3)Amide linkage(S)Nylon-10,6(4)Glycoside linkage(5)Disaccharides Match each product in LIST-I with one or more reaction in LIST-II and choose the correct option.
Answer» Match the chemical substances in Column – I with type of polymer/ type of bonds in Column - II $\begin{matrix} Columns - I & Column - II (P) & Starch & (1) & Natural Polymer (Q) & Protein & (2) & Synthetic polymer (R) & Maltose & (3) & Amide linkage (S) & Nylon-10,6 & (4) & Glycoside linkage (5) & Disaccharides \end{matrix}$ Match each product in LIST-I with one or more reaction in LIST-II and choose the correct option.

Discussion

27.	What is ionic mobility of halogens
Answer» What is ionic mobility of halogens

Discussion

28.	What will happen if the lipases does not act upon the fats?
Answer» What will happen if the lipases does not act upon the fats?

Discussion

29.	16 In aqueous solution, why is Mn2+ is more stable than Mn3+
Answer» 16 In aqueous solution, why is Mn2+ is more stable than Mn3+

Discussion

30.	30 Successive ionization energies of Mg are X=IE1 Y=IE2 Z=IE3 Then correct relation A) x>y>z B) zy> zx C) zx>zy D) y>x>z
Answer» 30 Successive ionization energies of Mg are X=IE1 Y=IE2 Z=IE3 Then correct relation A) x>y>z B) zy> zx C) zx>zy D) y>x>z

Discussion

31.	Explainthe formation of H2molecule on the basis of valence bond theory.
Answer» Explain the formation of H₂ molecule on the basis of valence bond theory.

Discussion

32.	Why are alkali metals not found in nature?
Answer» Why are alkali metals not found in nature?

Discussion

33.	Consider the following compoundIf in the given compound, number of stereogenic centers are x and stereoisomers are y then, calculate the value of x+y?
Answer» Consider the following compound If in the given compound, number of stereogenic centers are $x$ and stereoisomers are $y$ then, calculate the value of $x + y$ ?

Discussion

34.	The logλ -logE graph between the de-Broglie wavelength λof an electron and its energy will be
Answer» The log $λ$ -log $E$ graph between the de-Broglie wavelength $λ$ of an electron and its energy will be

Discussion

35.	Letbea function from Rinto R.Determine the range of f.
Answer» Letbe a function from R into R. Determine the range of f.

Discussion

36.	How many grams of a 70% concentrated nitric acid solution sholud be used to prepare 250 mL of 2.0 M HNO3 solution?
Answer» How many grams of a 70% concentrated nitric acid solution sholud be used to prepare $250 m L$ of $2.0 M H N O_{3}$ solution?

Discussion

37.	The anhydride of carbonic acid is:
Answer» The anhydride of carbonic acid is:

Discussion

38.	If a stands for the edge length of the cubic systems: simple cubic, body-centered cubic and face-centered cubic, then the ratio of radii of the spheres in these systems will respectively be :
Answer» If a stands for the edge length of the cubic systems: simple cubic, body-centered cubic and face-centered cubic, then the ratio of radii of the spheres in these systems will respectively be :

Discussion

39.	Show by proper chemical reactions how hydrogen peroxide xan function both as an oxidizing agent and a reducing agent
Answer» Show by proper chemical reactions how hydrogen peroxide xan function both as an oxidizing agent and a reducing agent

Discussion

40.	A hydrocarbon X(C7H14) on ozonolysis followed by work-up Zn−H2O gives C6H12O as one of the product which on subsequent treatment with KOH/I2 gives yellow precipitate and salt of a chiral acid. Hence, X could be
Answer» A hydrocarbon $X (C_{7} H_{14})$ on ozonolysis followed by work-up $Z n - H_{2} O$ gives $C_{6} H_{12} O$ as one of the product which on subsequent treatment with $K O H / I_{2}$ gives yellow precipitate and salt of a chiral acid. Hence, X could be

Discussion

41.	19. For a spontaneous reaction, AG, equilibrium constant K and Eo,will be respectivelycell(1) -ve, > 1, +ve(2) +ve, > 1, -ve(3) -ve, < 1, -ve(4) -ve, > 1, -ve
Answer» 19. For a spontaneous reaction, AG, equilibrium constant K and Eo,will be respectivelycell(1) -ve, > 1, +ve(2) +ve, > 1, -ve(3) -ve, < 1, -ve(4) -ve, > 1, -ve

Discussion

42.	Cell constant is
Answer» Cell constant is

Discussion

43.	what is the normality of water?
Answer» what is the normality of water?

Discussion

44.	The solubility product of a sparingly soluble salt A2B is 3.2×10−11. Its solubility in molL−1 is:
Answer» The solubility product of a sparingly soluble salt $A_{2} B$ is $3.2 \times 10^{- 11}$ . Its solubility in $m o l L^{- 1}$ is:

Discussion

45.	When the pH of the solution decreases, its hydrogen ion concentration
Answer» When the pH of the solution decreases, its hydrogen ion concentration

Discussion

46.	The total number of reducing sugars among the following is:
Answer» The total number of reducing sugars among the following is:

Discussion

47.	A liquid is contained in a vertical tube of semicircular cross section. The contact angle is zero. The forces of surface tension on the curved part and on the flat part are in ratio.
Answer» A liquid is contained in a vertical tube of semicircular cross section. The contact angle is zero. The forces of surface tension on the curved part and on the flat part are in ratio.

47.

A liquid is contained in a vertical tube of semicircular cross section. The contact angle is zero. The forces of surface tension on the curved part and on the flat part are in ratio.

Answer»

A liquid is contained in a vertical tube of semicircular cross section. The contact angle is zero. The forces of surface tension on the curved part and on the flat part are in ratio.

Discussion

48.	What is the molecular formula of heptane and ethane respectively?
Answer» What is the molecular formula of heptane and ethane respectively?

Discussion

49.	16 g of SOx occupies 5.6 litres at STP. Assuming ideal gas nature, the value of x is Options:a-1 b- 2 c- 4 d-3
Answer» 16 g of SOx occupies 5.6 litres at STP. Assuming ideal gas nature, the value of x is Options:a-1 b- 2 c- 4 d-3

Discussion

50.	Q. the enthalpy of solution of NaCl is 4 KJ mol^{-1} and its enthalpy of hydration of ions is -784KJ mol^{-1} what will be the lattice enthalpy of NaCl.
Answer» Q. the enthalpy of solution of NaCl is 4 KJ mol^{-1} and its enthalpy of hydration of ions is -784KJ mol^{-1} what will be the lattice enthalpy of NaCl.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The elements which occupy the peaks of ionization energy curve are

The specific gravity of a HNO_3 solution is 1.42 and it is 70% w/w. The molar concentration of HNO_3 is (1) 15.8 (2) 31.6 (3) 11.1 (4) 14.2

Is there any lower limit to the electric forces between two particles placed at a separation of 1cm?

why the boiling point of hydrides of carbon family increases

What happens when a base reacts with a metal

surfce of na is illuminated by a light of 6000 a wavelength .work function f sodium is 1.6 ev then minimm kinetic energy of emited electron is

In H2−O2 fuel cell the reaction occuring at cathode is:

22.4215g metallic carbonate was heated in a hard glass tube and co2 evolved was found to be measured 1336 ml at 27^° Celsius and 700 mm pressure .what is the equivalent mass of the metal?

Order of depression in freezing point of solution vane same concentration of acetic acid trichloroacetic acid trifluoroacetic acid is

40 Assertion: the decarboxylation of 3- Nitro butanoic acid is difficult than that of 3 -methyl butanoic acid. Reason: the carbanion formed is destabilized in 3-nitro butanoic acid.

(Q) 0.25 mole of a hydrocarbon requires 0.5 mole of hydrogen for complete saturation. Possible formula of the hydrocarbon is :-(1) C3H8 (2) C3H6 (3) C4H8 (4) C3H4

Which of the following is most easily cleaved by HBr:

for Be Z_{eff}=1.95 and for Be^{+X} ,Z_{eff} =2.30. hence ion is

if y=log x base 10 then the value ofdy/dx is

what is dative bond

For the reaction, ΔG0=−42927 joules at 250C.H2(g, 1 atm)+2AgCl(s)⇌2Ag(s)+2H+(aq, 0.1M)+2Cl−(aq, 0.1 M)Calculate the emf of the cell of given reaction.

38. Balance this reaction by oxidation number method,FeS2+O2=Fe2O3+SO2

5.Why can't sigma Bond be formed between s-d orbitals or p-d orbitals or d-d orbitals?

The correct IUPAC name for CH2=CH CH2NH CH3 is

For the reaction, N2 + 3H2 2NH3, the rate of change of concentration for hydrogen is 4 g/h. The rate of change of concentration of NH3 is

During the reaction given belowCO + I2O5 → CO2 + I2What are the equivalent weights of CO and I2O5 if their molar masses are M1 and M2 respectively?

What is true about the complex tetraammine zinc (II) ion ?

Among the following, the strongest base is

The standard enthalpy of formation of CO2 , H2O and glucose at 25 degree celcius are -400 KJ /mol , -300KJ/mol and - 1300 KJ /mol . The standard enthalpy of combustion per gm of glucose is

What is ionic mobility of halogens

What will happen if the lipases does not act upon the fats?

16 In aqueous solution, why is Mn2+ is more stable than Mn3+

30 Successive ionization energies of Mg are X=IE1 Y=IE2 Z=IE3 Then correct relation A) x>y>z B) zy> zx C) zx>zy D) y>x>z

Explainthe formation of H2molecule on the basis of valence bond theory.

Why are alkali metals not found in nature?

Consider the following compoundIf in the given compound, number of stereogenic centers are x and stereoisomers are y then, calculate the value of x+y?

The logλ -logE graph between the de-Broglie wavelength λof an electron and its energy will be

Letbea function from Rinto R.Determine the range of f.

How many grams of a 70% concentrated nitric acid solution sholud be used to prepare 250 mL of 2.0 M HNO3 solution?

The anhydride of carbonic acid is:

If a stands for the edge length of the cubic systems: simple cubic, body-centered cubic and face-centered cubic, then the ratio of radii of the spheres in these systems will respectively be :

Show by proper chemical reactions how hydrogen peroxide xan function both as an oxidizing agent and a reducing agent

A hydrocarbon X(C7H14) on ozonolysis followed by work-up Zn−H2O gives C6H12O as one of the product which on subsequent treatment with KOH/I2 gives yellow precipitate and salt of a chiral acid. Hence, X could be

19. For a spontaneous reaction, AG, equilibrium constant K and Eo,will be respectivelycell(1) -ve, > 1, +ve(2) +ve, > 1, -ve(3) -ve, < 1, -ve(4) -ve, > 1, -ve

Cell constant is

what is the normality of water?

The solubility product of a sparingly soluble salt A2B is 3.2×10−11. Its solubility in molL−1 is:

When the pH of the solution decreases, its hydrogen ion concentration

The total number of reducing sugars among the following is:

A liquid is contained in a vertical tube of semicircular cross section. The contact angle is zero. The forces of surface tension on the curved part and on the flat part are in ratio.

What is the molecular formula of heptane and ethane respectively?

16 g of SOx occupies 5.6 litres at STP. Assuming ideal gas nature, the value of x is Options:a-1 b- 2 c- 4 d-3

Q. the enthalpy of solution of NaCl is 4 KJ mol^{-1} and its enthalpy of hydration of ions is -784KJ mol^{-1} what will be the lattice enthalpy of NaCl.