46295 + Interview Questions in Chemistry

1.	Calculate oxidation state of Cu in Cu(NO3)2?
Answer» Calculate oxidation state of Cu in Cu(NO3)2?

Discussion

2.	From the given compounds, how many total number of compounds are acidic in nature. CaO,SO2,SO3,Fe2O3,Cl2O7,CO2,N2O
Answer» From the given compounds, how many total number of compounds are acidic in nature. $C a O, S O_{2}, S O_{3}, F e_{2} O_{3}, C l_{2} O_{7}, C O_{2}, N_{2} O$

Discussion

3.	The pH value of solution in which a polar amino acids does not migrate under the influence of electric field is called
Answer» The pH value of solution in which a polar amino acids does not migrate under the influence of electric field is called

Discussion

4.	The correct order of increasing +I effect is :
Answer» The correct order of increasing $+ I$ effect is :

Discussion

5.	If ax+bx≤ c for all positive x, where a, b > 0, then
Answer» If $a x + \frac{b}{x} \leq$ c for all positive x, where a, b > 0, then

Discussion

6.	Which of the following chemical systems is non-aromatic?
Answer» Which of the following chemical systems is non-aromatic?

Discussion

7.	Relative permittivity and permeability of a material are ∈r and μr respectively. Which of the following values are allowed for diamagnetic material ?
Answer» Relative permittivity and permeability of a material are $\in_{r}$ and $μ_{r}$ respectively. Which of the following values are allowed for diamagnetic material ?

Discussion

8.	Define the term polymerization.
Answer» Define the term polymerization.

Discussion

9.	Write wedge dash representation for the following compound. CH3Cl Assume one Hydrogen is below the plane and chlorine is above the plane.
Answer» Write wedge dash representation for the following compound. $C H_{3} C l$ Assume one Hydrogen is below the plane and chlorine is above the plane.

Discussion

10.	Which of the following gases will have density of 1.8 g L−1 at 760 torr pressure and 27∘C ? (Given R=0.082 L atm K −1 mol−1, 760 torr=1 bar,1oC=273 K)
Answer» Which of the following gases will have density of $1.8 g L^{- 1}$ at $760 t o r r$ pressure and $27^{\circ} C$ ? $(G i v e n R = 0.082 L a t m K^{- 1} m o l^{- 1}, 760 t o r r = 1 b a r, 1^{o} C = 273 K)$

Discussion

11.	Determine the amount of ester present under equilibrium when 3 moles of ethyl alcohol react with 1 mole of acetic acid, when equilibium constant of the reaction is given as 4.
Answer» Determine the amount of ester present under equilibrium when 3 moles of ethyl alcohol react with 1 mole of acetic acid, when equilibium constant of the reaction is given as 4.

Discussion

12.	A compound contain 25% hydrogen and 75% carbon by mass. The empirical formula of the compound is:
Answer» A compound contain 25% hydrogen and 75% carbon by mass. The empirical formula of the compound is:

Discussion

13.	Which of the following is most stable cycloalkane?
Answer» Which of the following is most stable cycloalkane?

Discussion

14.	In the atomic volume vs atomic weight of the elements graph, which of the following elements occupies a peak of the curve?
Answer» In the atomic volume vs atomic weight of the elements graph, which of the following elements occupies a peak of the curve?

Discussion

15.	How many carbon atoms are present in 0.35 mol of C6H12O6:
Answer» How many carbon atoms are present in 0.35 mol of $C_{6} H_{12} O_{6}$ :

Discussion

16.	What r equivalent positions of atoms in geometry of molecules sir
Answer» What r equivalent positions of atoms in geometry of molecules sir

Discussion

17.	(ΔH−ΔU) for the formation of carbon monoxide (CO) from its elements at 298 K is (R=8.314 J K−1 mol−1)
Answer» $(Δ H - Δ U)$ for the formation of carbon monoxide $(C O)$ from its elements at $298 K$ is $(R = 8.314 J K^{- 1} {mol}^{- 1})$

Discussion

18.	Whether pills increases hormone concentrations?
Answer» Whether pills increases hormone concentrations?

Discussion

19.	Alkali metals are paramagnetic not their metals
Answer» Alkali metals are paramagnetic not their metals

Discussion

20.	IE1 and IE2 of magnesium are 7.6 eV and 15.0 eV respectively. The amount of energy in kJ needed to convert all the atoms of magnesium into Mg2+ ions present in 36 mg of magnesium vapour will be: [Given: 1 eV=96.5 kJ mol–1].
Answer» $I E_{1}$ and $I E_{2}$ of magnesium are $7.6 eV$ and $15.0 eV$ respectively. The amount of energy in $kJ$ needed to convert all the atoms of magnesium into $M g^{2 +}$ ions present in $36 mg$ of magnesium vapour will be: [Given: $1 eV = 96.5 {kJ mol}^{- 1}$ ].

Discussion

21.	Lanthanons have weaker tendency to form complexes. Give reason.
Answer» Lanthanons have weaker tendency to form complexes. Give reason.

Discussion

22.	Why is delocalisation of pi electrons necessary for a compound to be aromatic? What is its significance?
Answer» Why is delocalisation of pi electrons necessary for a compound to be aromatic? What is its significance?

Discussion

23.	The equilibrium constant for the following reaction are given at 25 ∘C 2A⇋B+C, K1=1.0 2B⇋C+D, K2=16 2C+D⇋2P, K3=25 The equilibrium constant for the reaction P⇋A+12B at 25 ∘C is
Answer» The equilibrium constant for the following reaction are given at $25^{\circ} C$ $2 A ⇋ B + C, K_{1} = 1.0$ $2 B ⇋ C + D, K_{2} = 16$ $2 C + D ⇋ 2 P, K_{3} = 25$ The equilibrium constant for the reaction $P ⇋ A + \frac{1}{2} B$ at $25^{\circ} C$ is

Discussion

24.	Why potassium is lighter than sodium?
Answer» Why potassium is lighter than sodium?

Discussion

25.	The molar mass (g/mol) of final product C in above reaction is
Answer» The molar mass (g/mol) of final product C in above reaction is

Discussion

26.	An oxide of nitrogen has a molecular weight of 30 .total number of electrons in one molecule of the compound is
Answer» An oxide of nitrogen has a molecular weight of 30 .total number of electrons in one molecule of the compound is

Discussion

27.	Which of the following complex will be paramagnetic ?
Answer» Which of the following complex will be paramagnetic ?

Discussion

28.	The specific heat of one mole of an ideal gas at constant volume is21.2 J/mol/c if the temp. Is increase by 1c keeping the volume constant the changeinits internal energy is
Answer» The specific heat of one mole of an ideal gas at constant volume is21.2 J/mol/c if the temp. Is increase by 1c keeping the volume constant the changeinits internal energy is

Discussion

29.	2.8 g of a gas at 1 atm and 273 K occupies a volume of 2.24 litres. The gas cannot be:
Answer» $2.8 g$ of a gas at $1 atm$ and $273 K$ occupies a volume of 2.24 litres. The gas cannot be:

Discussion

30.	how to find stability of a carboanion
Answer» how to find stability of a carboanion

Discussion

31.	The electrons identified by quantum numbers n and l: (P) n = 5, l = 1 (Q) n = 3, l = 0 (R) n = 4, l = 2 (S) n = 2, l = 1 can be placed in decreasing order of energy as :
Answer» The electrons identified by quantum numbers n and l: (P) n = 5, l = 1 (Q) n = 3, l = 0 (R) n = 4, l = 2 (S) n = 2, l = 1 can be placed in decreasing order of energy as :

Discussion

32.	Which of the following Carboxylic acid donot undergo decarboxylation on heating?
Answer» Which of the following Carboxylic acid donot undergo decarboxylation on heating?

Discussion

33.	Assertion (A) Ethanol is a weaker acid than phenol. Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH. (a) Assertion and reason both are correct and reason is correct explanation of assertion. (b) Assertion and reason both are wrong statements. (c) Assertion is correct statement but reason is wrong statement. (d) Assertion is wrong statement but reason is correct statement. (e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.
Answer» Assertion (A) Ethanol is a weaker acid than phenol. Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH. (a) Assertion and reason both are correct and reason is correct explanation of assertion. (b) Assertion and reason both are wrong statements. (c) Assertion is correct statement but reason is wrong statement. (d) Assertion is wrong statement but reason is correct statement. (e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Discussion

34.	3(A) + NaNO2 → 2Na2O + 5N2 : A is
Answer» $3 (A) + N a N O_{2} \to 2 N a_{2} O + 5 N_{2} : A$ is

Discussion

35.	In a 100 ml solution of acetic acid (0.08 N), an adsorbent (2 grams) was added. The adsorbent was then removed and the strength of the remaining solution was found to be (0.04 N). The amount of acetic acid adsorbed per gram is
Answer» In a 100 ml solution of acetic acid (0.08 N), an adsorbent (2 grams) was added. The adsorbent was then removed and the strength of the remaining solution was found to be (0.04 N). The amount of acetic acid adsorbed per gram is

Discussion

36.	In intrinsic semiconductors how are no of holes equal to no of electrons ?
Answer» In intrinsic semiconductors how are no of holes equal to no of electrons ?

Discussion

37.	Can you please explain the gases in liquid equilibrium using the example of CO2 bubble in a soda bottle and the changes with pressure.
Answer» Can you please explain the gases in liquid equilibrium using the example of CO2 bubble in a soda bottle and the changes with pressure.

Discussion

38.	If carbon atom has electronic configuration 1s6, it would have energy lower than that of the normal ground state configuration 1s2 2s2 2p2. Yet 1s6 is not observed because it violates
Answer» If carbon atom has electronic configuration 1 $s^{6}$ , it would have energy lower than that of the normal ground state configuration 1 $s^{2}$ 2 $s^{2}$ 2 $p^{2}$ . Yet 1 $s^{6}$ is not observed because it violates

Discussion

39.	A compound contains 4.07% hydrogen, 24.27% Carbon and 71.65% Chlorine. Its molar mass is 90.96g. What are it's empirical and molecular formula?
Answer» A compound contains 4.07% hydrogen, 24.27% Carbon and 71.65% Chlorine. Its molar mass is 90.96g. What are it's empirical and molecular formula?

Discussion

40.	Dilution processes of different aqueous solution, with water, are given in LIST-I. The effects of dilution of the solutions on [H+] are given in LIST -II. (Note: Degree of dissociation (α) of weak acid and weak base is << 1; degree of hydrolysis of salt << 1; [H+] represents the concentration of H+ ions) LIST -ILIST-IIP. 10 mL of 0.1 M NaOH +20 mL of1. The value of [H+] does not0.1 M acetic acid diluted to 60 mLchange on dilutionQ. 20 mL of 0.1 M NaOH +20 mL of2. The value of [H+] changes to half0.1 M acetic acid diluted to 80 mLof its initial value on dilutionR. 20 mL of 0.1 M HCl + 20 mL of 0.13. The value of [H+] changes to twoM ammonia solution diluted to 80 mLtimes of its initial value on dilutionS. 10 mL saturated solution of Ni(OH)24. The value of [H+] changes to 1√2in equilibrium with excess solid Ni(OH)2times of its initial value on dilutionis diluted to 20 mL (solid Ni(OH)2is stillpresent after dilution).5. The value of [H+] changes to √2times of its initial value on dilution Match each process given in LIST -I with one or more effect(s) in LIST -II. The correct option is
Answer» Dilution processes of different aqueous solution, with water, are given in LIST-I. The effects of dilution of the solutions on $[H^{+}]$ are given in LIST -II. (Note: Degree of dissociation $(α)$ of weak acid and weak base is << 1; degree of hydrolysis of salt << 1; $[H^{+}]$ represents the concentration of $H^{+}$ ions) $\begin{matrix} LIST -I & LIST-II P. 10 mL of 0.1 M NaOH +20 mL of & 1. The value of [H^{+}] does not 0.1 M acetic acid diluted to 60 mL & change on dilution Q. 20 mL of 0.1 M NaOH +20 mL of & 2. The value of [H^{+}] changes to half 0.1 M acetic acid diluted to 80 mL & of its initial value on dilution R. 20 mL of 0.1 M HCl + 20 mL of 0.1 & 3. The value of [H^{+}] changes to two M ammonia solution diluted to 80 mL & times of its initial value on dilution S. 10 mL saturated solution of N i (O H)_{2} & 4. The value of [H^{+}] changes to \frac{1}{\sqrt{2}} in equilibrium with excess solid N i (O H)_{2} & times of its initial value on dilution is diluted to 20 mL (solid N i (O H)_{2} is still present after dilution). 5. The value of [H^{+}] changes to \sqrt{2} times of its initial value on dilution \end{matrix}$ Match each process given in LIST -I with one or more effect(s) in LIST -II. The correct option is

Discussion

41.	Two ions A+ and B− have radii 88pm and 200pm, respectively. In the close-packed crystal of the compound AB, predict the coordination number of A+
Answer» Two ions $A^{+}$ and $B^{-}$ have radii 88pm and 200pm, respectively. In the close-packed crystal of the compound AB, predict the coordination number of $A^{+}$

Discussion

42.	The e.m.f. of the cell at 25∘C CuCu2+(0.01M)\|\|Ag+(0.1M)Ag is [E0(Cu2+Cu)=0.34V and E0(Ag+Ag)=0.80V]
Answer» The e.m.f. of the cell at $25^{\circ} C$ $\frac{C u}{C u^{2 +} (0.01 M)} \| \| \frac{A g^{+} (0.1 M)}{A g}$ is $[E^{0} (\frac{C u^{2 +}}{C u}) = 0.34 V a n d E^{0} (\frac{A g +}{A g}) = 0.80 V]$

Discussion

43.	Consider the reactions: (a) H3PO2(aq)+4AgNO3(aq)+2H2O(l)→H3PO4(aq)+4Ag(s)+4HNO3(aq) (b) H3PO2(aq)+2CuSO4(aq)+2H2O(l)→H3PO4(aq)+2Cu(s)+H2SO4(aq) (c) C6H5CHO(l)+2[Ag(NH3)2]+(aq)+3OH–(aq)→C6H5COO–(aq)+2Ag(s)+4NH3(aq)+2H2O(l) (d) C6H5CHO(l)+2Cu2+(aq)+5OH–(aq)→ No change observed. What inference do you draw about the behaviour of Ag+ and Cu2+ from these reactions?
Answer» Consider the reactions: (a) $H_{3} P O_{2} (a q) + 4 A g N O_{3} (a q) + 2 H_{2} O (l) \to H_{3} P O_{4} (a q) + 4 A g (s) + 4 H N O_{3} (a q)$ (b) $H_{3} P O_{2} (a q) + 2 C u S O_{4} (a q) + 2 H_{2} O (l) \to H_{3} P O_{4} (a q) + 2 C u (s) + H_{2} S O_{4} (a q)$ (c) $C_{6} H_{5} C H O (l) + 2 [A g (N H_{3}) 2]^{+} (a q) + 3 O H^{-} (a q) \to C_{6} H_{5} C O O^{-} (a q) + 2 A g (s) + 4 N H_{3} (a q) + 2 H_{2} O (l)$ (d) $C_{6} H_{5} C H O (l) + 2 C u^{2 +} (a q) + 5 O H^{-} (a q) \to$ No change observed. What inference do you draw about the behaviour of $A g^{+} a n d C u^{2 +}$ from these reactions?

Discussion

44.	The decreasing order of reactivity of different forms of hydrogen is:
Answer» The decreasing order of reactivity of different forms of hydrogen is:

Discussion

45.	What happens when acetic acid reacts with ethanol in presence of conc. H2SO4 ?
Answer» What happens when acetic acid reacts with ethanol in presence of conc. H₂SO₄?

Discussion

46.	What is M1V1=M2V2 different from M1=M2V2/(V1+V2)and N1V1=N2V2
Answer» What is M1V1=M2V2 different from M1=M2V2/(V1+V2)and N1V1=N2V2

Discussion

47.	\| CH3−⊕CH−CH3 \|\| CH3−⊕CH−OCH3 \|\|\| CH3−⊕CH−COCH3
Answer» $\| C H_{3} - \oplus C H - C H_{3} \| \| C H_{3} - \oplus C H - O C H_{3} \| \| \| C H_{3} - \oplus C H - C O C H_{3}$

Discussion

48.	For the decomposition reaction4HNO3(g)⇌4NO2(g)+2H2O+O2(g) if we start with only the reactant HNO3 and p = equilibrium pressure, the equilibrium constant Kp is:
Answer» For the decomposition reaction $4 H N O_{3} (g) ⇌ 4 N O_{2} (g) + 2 H_{2} O + O_{2}$ (g) if we start with only the reactant $H N O_{3}$ and p = equilibrium pressure, the equilibrium constant $K_{p}$ is:

Discussion

49.	If at 298 K the bond energies of C - H, C - C, C=C and H - H bonds are respectively 414, 347, 615 and 435 kJ mol−1, the value of enthalpy change for the reaction
Answer» If at 298 K the bond energies of C - H, C - C, C=C and H - H bonds are respectively 414, 347, 615 and 435 kJ $m o l^{- 1}$ , the value of enthalpy change for the reaction

Discussion

50.	Orthoboric acid when heated to red hot gives
Answer» Orthoboric acid when heated to red hot gives

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Calculate oxidation state of Cu in Cu(NO3)2?

From the given compounds, how many total number of compounds are acidic in nature. CaO,SO2,SO3,Fe2O3,Cl2O7,CO2,N2O

The pH value of solution in which a polar amino acids does not migrate under the influence of electric field is called

The correct order of increasing +I effect is :

If ax+bx≤ c for all positive x, where a, b &gt; 0, then

Which of the following chemical systems is non-aromatic?

Relative permittivity and permeability of a material are ∈r and μr respectively. Which of the following values are allowed for diamagnetic material ?

Define the term polymerization.

Write wedge dash representation for the following compound. CH3Cl Assume one Hydrogen is below the plane and chlorine is above the plane.

Which of the following gases will have density of 1.8 g L−1 at 760 torr pressure and 27∘C ? (Given R=0.082 L atm K −1 mol−1, 760 torr=1 bar,1oC=273 K)

Determine the amount of ester present under equilibrium when 3 moles of ethyl alcohol react with 1 mole of acetic acid, when equilibium constant of the reaction is given as 4.

A compound contain 25% hydrogen and 75% carbon by mass. The empirical formula of the compound is:

Which of the following is most stable cycloalkane?

In the atomic volume vs atomic weight of the elements graph, which of the following elements occupies a peak of the curve?

How many carbon atoms are present in 0.35 mol of C6H12O6:

What r equivalent positions of atoms in geometry of molecules sir

(ΔH−ΔU) for the formation of carbon monoxide (CO) from its elements at 298 K is (R=8.314 J K−1 mol−1)

Whether pills increases hormone concentrations?

Alkali metals are paramagnetic not their metals

IE1 and IE2 of magnesium are 7.6 eV and 15.0 eV respectively. The amount of energy in kJ needed to convert all the atoms of magnesium into Mg2+ ions present in 36 mg of magnesium vapour will be: [Given: 1 eV=96.5 kJ mol–1].

Lanthanons have weaker tendency to form complexes. Give reason.

Why is delocalisation of pi electrons necessary for a compound to be aromatic? What is its significance?

The equilibrium constant for the following reaction are given at 25 ∘C 2A⇋B+C, K1=1.0 2B⇋C+D, K2=16 2C+D⇋2P, K3=25 The equilibrium constant for the reaction P⇋A+12B at 25 ∘C is

Why potassium is lighter than sodium?

The molar mass (g/mol) of final product C in above reaction is

An oxide of nitrogen has a molecular weight of 30 .total number of electrons in one molecule of the compound is

Which of the following complex will be paramagnetic ?

The specific heat of one mole of an ideal gas at constant volume is21.2 J/mol/c if the temp. Is increase by 1c keeping the volume constant the changeinits internal energy is

2.8 g of a gas at 1 atm and 273 K occupies a volume of 2.24 litres. The gas cannot be:

how to find stability of a carboanion

The electrons identified by quantum numbers n and l: (P) n = 5, l = 1 (Q) n = 3, l = 0 (R) n = 4, l = 2 (S) n = 2, l = 1 can be placed in decreasing order of energy as :

Which of the following Carboxylic acid donot undergo decarboxylation on heating?

3(A) + NaNO2 → 2Na2O + 5N2 : A is

In a 100 ml solution of acetic acid (0.08 N), an adsorbent (2 grams) was added. The adsorbent was then removed and the strength of the remaining solution was found to be (0.04 N). The amount of acetic acid adsorbed per gram is

In intrinsic semiconductors how are no of holes equal to no of electrons ?

Can you please explain the gases in liquid equilibrium using the example of CO2 bubble in a soda bottle and the changes with pressure.

If carbon atom has electronic configuration 1s6, it would have energy lower than that of the normal ground state configuration 1s2 2s2 2p2. Yet 1s6 is not observed because it violates

A compound contains 4.07% hydrogen, 24.27% Carbon and 71.65% Chlorine. Its molar mass is 90.96g. What are it's empirical and molecular formula?

Two ions A+ and B− have radii 88pm and 200pm, respectively. In the close-packed crystal of the compound AB, predict the coordination number of A+

The e.m.f. of the cell at 25∘C CuCu2+(0.01M)||Ag+(0.1M)Ag is [E0(Cu2+Cu)=0.34V and E0(Ag+Ag)=0.80V]

The decreasing order of reactivity of different forms of hydrogen is:

What happens when acetic acid reacts with ethanol in presence of conc. H2SO4 ?

What is M1V1=M2V2 different from M1=M2V2/(V1+V2)and N1V1=N2V2

| CH3−⊕CH−CH3 || CH3−⊕CH−OCH3 ||| CH3−⊕CH−COCH3

For the decomposition reaction4HNO3(g)⇌4NO2(g)+2H2O+O2(g) if we start with only the reactant HNO3 and p = equilibrium pressure, the equilibrium constant Kp is:

If at 298 K the bond energies of C - H, C - C, C=C and H - H bonds are respectively 414, 347, 615 and 435 kJ mol−1, the value of enthalpy change for the reaction

Orthoboric acid when heated to red hot gives

If ax+bx≤ c for all positive x, where a, b > 0, then