46295 + Interview Questions in Chemistry

1.	An organic compound has molecular formula C9H18. Its all carbon atoms are sp3 hybridized and its all hydrogen atoms are identical. Its structural formula can be
Answer» An organic compound has molecular formula $C_{9} H_{18}$ . Its all carbon atoms are $s p^{3}$ hybridized and its all hydrogen atoms are identical. Its structural formula can be

Discussion

2.	The major product for the following reaction is:
Answer» The major product for the following reaction is:

Discussion

3.	Predict the order of Δo for the following compounds:- (i) [Cr(H2O)6]3+ (ii) [Cr(CN)2(H2O)4]− (iii) [Cr(CN)4(H2O)2]− (iv) [Cr(CN)6]3−
Answer» Predict the order of $Δ_{o}$ for the following compounds:- (i) $[C r (H_{2} O)_{6}]^{3 +}$ (ii) $[C r (C N)_{2} (H_{2} O)_{4}]^{-}$ (iii) $[C r (C N)_{4} (H_{2} O)_{2}]^{-}$ (iv) $[C r (C N)_{6}]^{3 -}$

Discussion

4.	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

5.	What is the minimum uncertainty in the location (in mm) of a photon of wavelength 1000 ∘A. If this wavelength is known to an accuracy of one part in million? (Take π=3)
Answer» What is the minimum uncertainty in the location (in mm) of a photon of wavelength 1000 $\circ A$ . If this wavelength is known to an accuracy of one part in million? (Take $π = 3$ )

Discussion

6.	Which of the following is anti-aromatic in nature?
Answer» Which of the following is anti-aromatic in nature?

Discussion

7.	The solubility of CaF2 is 0.5×10−4molL−1. The value for Ksp for the salt is?
Answer» The solubility of $C a F_{2}$ is $0.5 \times 10^{- 4} m o l L^{- 1}$ . The value for Ksp for the salt is?

Discussion

8.	What does I2 means which is given in ncert in polysaccharides section?
Answer» What does I2 means which is given in ncert in polysaccharides section?

Discussion

9.	Which of the following gas is most difficult to compress and liquefy:
Answer» Which of the following gas is most difficult to compress and liquefy:

Discussion

10.	The ratio of wavelengths of photons corresponding to the β - line of Lyman series in H - atom and α - line of Balmer series in Li2+ is:
Answer» The ratio of wavelengths of photons corresponding to the $β$ - line of Lyman series in H - atom and $α$ - line of Balmer series in $L i^{2 +}$ is:

Discussion

11.	Why does boiling point depend on mass?
Answer» Why does boiling point depend on mass?

Discussion

12.	2 litres of an ideal gas at a pressure of 10atm expands isothermally into vacuum until its total volume is 10 litres. How much work is done? How much heat is absorbed? Consider the same expansion but this time the constant external pressure of 1 ATM?
Answer» 2 litres of an ideal gas at a pressure of 10atm expands isothermally into vacuum until its total volume is 10 litres. How much work is done? How much heat is absorbed? Consider the same expansion but this time the constant external pressure of 1 ATM?

Discussion

13.	What is the relation between electrochemical cell and Gibbs free energy of the cell reaction?
Answer» What is the relation between electrochemical cell and Gibbs free energy of the cell reaction?

Discussion

14.	2.48 g of Na2S2O3. xH2O is dissolved per litre of solution. 20 mL of this solution required 10 mL of 0.01 M iodine solution for a complete reaction. What is the value of x?
Answer» $2.48 g of N a_{2} S_{2} O_{3}$ . $x H_{2} O$ is dissolved per litre of solution. $20 mL$ of this solution required $10 mL$ of $0.01 M$ iodine solution for a complete reaction. What is the value of $x$ ?

Discussion

15.	What is the valency factor for bases in a given reaction?
Answer» What is the valency factor for bases in a given reaction?

Discussion

16.	Dipole moment of which ketone is maximum?
Answer» Dipole moment of which ketone is maximum?

Discussion

17.	Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal Carbonates is most stable thermally? (a) MgCO3 (b) CaCO3 (c) SrCO3 (d) BaCO3
Answer» Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal Carbonates is most stable thermally? (a) $M g C O_{3}$ (b) $C a C O_{3}$ (c) $S r C O_{3}$ (d) $B a C O_{3}$

Discussion

18.	From the stability constants (hypothetical values) given below, predict which one is the strongest ligand?
Answer» From the stability constants (hypothetical values) given below, predict which one is the strongest ligand?

Discussion

19.	If the photon of the wavelength 150 pm strikes an atom and one of its inner bound electrons is ejected out with a velocity of 1.5 × 107ms–1, calculate the energy with which it is bound to the nucleus.
Answer» If the photon of the wavelength 150 pm strikes an atom and one of its inner bound electrons is ejected out with a velocity of 1.5 × $10^{7} m s^{- 1}$ , calculate the energy with which it is bound to the nucleus.

Discussion

20.	How histamine acts as potent vasodilator?
Answer» How histamine acts as potent vasodilator?

Discussion

21.	What are the compositions in talc?
Answer» What are the compositions in talc?

Discussion

22.	The correct statements among the following areI. Due to greater polarizing power of Li+, Li2CO3 is most stableII. LiHCO3 does not exist as solidIII. NaNO3 on strong heating gives NaNO2where as LiNO3 will give Li2OIV. Sodium &Potassium ions are involved in the transport of sugars and amino acids in to the cellsV. LiF is less soluble due to smaller hydration energy of Li+ ion
Answer» The correct statements among the following are I. Due to greater polarizing power of Li⁺, Li₂CO₃ is most stable II. LiHCO₃ does not exist as solid III. NaNO₃ on strong heating gives NaNO₂where as LiNO₃ will give Li₂O IV. Sodium &Potassium ions are involved in the transport of sugars and amino acids in to the cells V. LiF is less soluble due to smaller hydration energy of Li⁺ion

Discussion

23.	50kg of nitrogen and 10 kg of hydrogen are mixed to produce ammonia . Calculate the ammonia formed and identify the limiting reagent in the production of ammonia in this situation . Explain using simple method ..( Define each step ..according to a beginer .. like ..first balanced chemical equation..converting to moles and identifying limiting reagent etc ( use simple english )
Answer» 50kg of nitrogen and 10 kg of hydrogen are mixed to produce ammonia . Calculate the ammonia formed and identify the limiting reagent in the production of ammonia in this situation . Explain using simple method ..( Define each step ..according to a beginer .. like ..first balanced chemical equation..converting to moles and identifying limiting reagent etc ( use simple english )

23.

50kg of nitrogen and 10 kg of hydrogen are mixed to produce ammonia . Calculate the ammonia formed and identify the limiting reagent in the production of ammonia in this situation . Explain using simple method ..( Define each step ..according to a beginer .. like ..first balanced chemical equation..converting to moles and identifying limiting reagent etc ( use simple english )

Answer»

50kg of nitrogen and 10 kg of hydrogen are mixed to produce ammonia . Calculate the ammonia formed and identify the limiting reagent in the production of ammonia in this situation .

Explain using simple method

..( Define each step ..according to a beginer ..

like ..first balanced chemical equation..converting to moles and identifying limiting reagent etc ( use simple english )

Discussion

24.	When MnO2 is fused with KOH in the presence of KNO3 as an oxidizing agent, it gives a dark green compound (A). Compound (A) disproportionates in acidic solution to give purple compound (B). An alkaline solution of compound (B) oxidises KI to compound (C) whereas an acidified solution of compound (B) oxidises KI to (D). Identify (A), (B), (C), and (D).
Answer» When $M n O_{2}$ is fused with $K O H$ in the presence of $K N O_{3}$ as an oxidizing agent, it gives a dark green compound (A). Compound (A) disproportionates in acidic solution to give purple compound (B). An alkaline solution of compound (B) oxidises $K I$ to compound (C) whereas an acidified solution of compound (B) oxidises $K I$ to (D). Identify (A), (B), (C), and (D).

Discussion

25.	The boiling point of C6H6 , CH3OH, C6H5NH2 and C6H5NO2 are 800C, 650C, 1840C and 2120C respectively. Which among them will show highest vapour pressure at room temperature?
Answer» The boiling point of C₆H₆, CH₃OH, C₆H₅NH₂and C₆H₅NO₂are 80⁰C, 65⁰C, 184⁰C and 212⁰C respectively. Which among them will show highest vapour pressure at room temperature?

Discussion

26.	The first order rate constant for the decomposition of N2O5 is 6.2 x 10-4 sec-1. The t1/2 of the decomposition reaction is
Answer» The first order rate constant for the decomposition of N₂O₅ is 6.2 x 10^-4 sec^-1. The t_1/2 of the decomposition reaction is

Discussion

27.	At CMC, the surfactant molecules
Answer» At CMC, the surfactant molecules

Discussion

28.	18 g of steam is passed over 2 g of iron.H2O + Fe → H2 + Fe2O3. is the excessive reagent? [Fe = 56 g]
Answer» $18 g$ of steam is passed over $2 g$ of iron. $H_{2} O + F e \to H_{2} + F e_{2} O_{3}$ . is the excessive reagent? [Fe = 56 g]

Discussion

29.	An AB2 type structure is found in
Answer» An $A B_{2}$ type structure is found in

Discussion

30.	Which one of the following ionic species has the greatest proton affinity to form stable compound?
Answer» Which one of the following ionic species has the greatest proton affinity to form stable compound?

Discussion

31.	Gold dissolves in aqua regia to give:
Answer» Gold dissolves in aqua regia to give:

Discussion

32.	Phenol on treatment with bromine water gives:
Answer» Phenol on treatment with bromine water gives:

Discussion

33.	The nucleus of the element having atomic number 25 and atomic weight 55 -will contain
Answer» The nucleus of the element having atomic number 25 and atomic weight 55 -will contain

33.

The nucleus of the element having atomic number 25 and atomic weight 55 -will contain

Answer»

The nucleus of the element having atomic number 25 and atomic weight 55 -will contain

Discussion

34.	In lab H2O2 is prepared by
Answer» In lab $H_{2} O_{2}$ is prepared by

Discussion

35.	The mole fraction of the solute in one molal aqueous solution is
Answer» The mole fraction of the solute in one molal aqueous solution is

Discussion

36.	5 g of pyrolusite (impure MnO2) was heated with conc. HCl and Cl2 evolved was passed through excess of KI solution. The iodine liberated required 40 mL of N10 hypo solution. Find the % of MnO2 in the pyrolusite (atomic mas of Mn = 55 amu).
Answer» 5 g of pyrolusite (impure $M n O_{2}$ ) was heated with conc. $H C l$ and $C l_{2}$ evolved was passed through excess of $K I$ solution. The iodine liberated required 40 mL of $\frac{N}{10}$ hypo solution. Find the $%$ of $M n O_{2}$ in the pyrolusite (atomic mas of Mn = 55 amu).

Discussion

37.	What are the bonds formed between metals and non-metals?
Answer» What are the bonds formed between metals and non-metals?

Discussion

38.	For the reaction CO(g)+H2O(g)⇌CO2(g)+H2(g) at a given temperature, the equilibrium amount of CO2(g) can be increased by
Answer» For the reaction $C O (g) + H_{2} O (g) ⇌ C O_{2} (g) + H_{2} (g)$ at a given temperature, the equilibrium amount of $C O_{2} (g)$ can be increased by

Discussion

39.	Give the structure of ‘A’ in the following reaction.
Answer» Give the structure of ‘A’ in the following reaction.

39.

Give the structure of ‘A’ in the following reaction.

Answer»

Give the structure of ‘A’ in the following reaction.

Discussion

40.	Highest size will be of
Answer» Highest size will be of

Discussion

41.	Considering complete ionization, Van't Hoff factor of Ca(NO3)2 is:
Answer» Considering complete ionization, Van't Hoff factor of Ca(NO₃)₂is:

Discussion

42.	Which of the following salt has the same value of van't Hoff factor i as that of K4[Fe(CN)6]
Answer» Which of the following salt has the same value of van't Hoff factor i as that of $K_{4} [F e (C N)_{6}]$

Discussion

43.	MetalM + N2 heat−−−→ Nitride H2O−−−→ NH3, Metal M is
Answer» $M e t a l M + N_{2} h e a t - -- \to N i t r i d e H_{2} O - -- \to N H_{3}$ , Metal M is

Discussion

44.	Find the percentage of P2O5 in (NH4)2HPO4
Answer» Find the percentage of P2O5 in (NH4)2HPO4

Discussion

45.	What is the difference between all the possible aldol products formed by ethanal and propanal with dilute NaOH and their corresponding dehydrated α,β unsaturated aldehydes?
Answer» What is the difference between all the possible aldol products formed by ethanal and propanal with dilute NaOH and their corresponding dehydrated $α, β$ unsaturated aldehydes?

Discussion

46.	Match the following coloumnIcoloumnII(I)(NH4)2SO4(P)h=√KHC(II)KCl(Q)PH=12[pKw+pKa+logc](III)(CH3)COOK(R)KH=KwKa∗Kb(IV)(NH4)2S(S)[H+]=[OH−]
Answer» Match the following $\begin{matrix} c o l o u m n I & c o l o u m n I I (I) (N H_{4})_{2} S O_{4} & (P) h = \sqrt{\frac{K_{H}}{C}} (I I) K C l & (Q) P^{H} = \frac{1}{2} [p^{K_{w}} + p^{K_{a}} + l o g c] (I I I) (C H_{3}) C O O K & (R) K^{H} = \frac{K_{w}}{K_{a} * K_{b}} (I V) (N H_{4})_{2} S & (S) [H^{+}] = [O H^{-}] \end{matrix}$

46.

Match the following coloumnIcoloumnII(I)(NH4)2SO4(P)h=√KHC(II)KCl(Q)PH=12[pKw+pKa+logc](III)(CH3)COOK(R)KH=KwKa∗Kb(IV)(NH4)2S(S)[H+]=[OH−]

Answer»

Match the following

$\begin{matrix} c o l o u m n I & c o l o u m n I I (I) (N H_{4})_{2} S O_{4} & (P) h = \sqrt{\frac{K_{H}}{C}} (I I) K C l & (Q) P^{H} = \frac{1}{2} [p^{K_{w}} + p^{K_{a}} + l o g c] (I I I) (C H_{3}) C O O K & (R) K^{H} = \frac{K_{w}}{K_{a} * K_{b}} (I V) (N H_{4})_{2} S & (S) [H^{+}] = [O H^{-}] \end{matrix}$

Discussion

47.	Identify 'Z' in the following sequence of reactions of ethanol PBrs−−−→Xalc.KOH−−−−−→Yi)conc.H2SO4−−−−−−−−→ii) H2O,ΔZ
Answer» Identify 'Z' in the following sequence of reactions of ethanol $P B_{r_{s}} - -- \to X a l c . K O H - ---- \to Y i) c o n c . H_{2} S O_{4} - ------- \to i i) H_{2} O, Δ Z$

47.

Identify 'Z' in the following sequence of reactions of ethanol PBrs−−−→Xalc.KOH−−−−−→Yi)conc.H2SO4−−−−−−−−→ii) H2O,ΔZ

Answer»

Identify 'Z' in the following sequence of reactions of ethanol

$P B_{r_{s}} - -- \to X a l c . K O H - ---- \to Y i) c o n c . H_{2} S O_{4} - ------- \to i i) H_{2} O, Δ Z$

Discussion

48.	On addition of AgNO3 slowly to 0.1 M each of NaCl and NaBr in a solution, what percentage of Br− ions get precipitated when Cl− ion starts precipitating ? KSP(AgCl)=1.0×10−10 KSP(AgBr)=1×10−13
Answer» On addition of $A g N O_{3}$ slowly to $0.1$ M each of $N a C l$ and $N a B r$ in a solution, what percentage of $B r^{-}$ ions get precipitated when $C l^{-}$ ion starts precipitating ? $K_{S P} (A g C l) = 1.0 \times 10^{- 10}$ $K_{S P} (A g B r) = 1 \times 10^{- 13}$

Discussion

49.	A condensation polymer among the following polymers is
Answer» A condensation polymer among the following polymers is

Discussion

50.	Calculate the molarity and molality of 93% H2SO4(w/v). The density of the solution is 1.84 g/mL.
Answer» Calculate the molarity and molality of 93% H2SO4(w/v). The density of the solution is 1.84 g/mL.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

An organic compound has molecular formula C9H18. Its all carbon atoms are sp3 hybridized and its all hydrogen atoms are identical. Its structural formula can be

The major product for the following reaction is:

Predict the order of Δo for the following compounds:- (i) [Cr(H2O)6]3+ (ii) [Cr(CN)2(H2O)4]− (iii) [Cr(CN)4(H2O)2]− (iv) [Cr(CN)6]3−

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

What is the minimum uncertainty in the location (in mm) of a photon of wavelength 1000 ∘A. If this wavelength is known to an accuracy of one part in million? (Take π=3)

Which of the following is anti-aromatic in nature?

The solubility of CaF2 is 0.5×10−4molL−1. The value for Ksp for the salt is?

What does I2 means which is given in ncert in polysaccharides section?

Which of the following gas is most difficult to compress and liquefy:

The ratio of wavelengths of photons corresponding to the β - line of Lyman series in H - atom and α - line of Balmer series in Li2+ is:

Why does boiling point depend on mass?

2 litres of an ideal gas at a pressure of 10atm expands isothermally into vacuum until its total volume is 10 litres. How much work is done? How much heat is absorbed? Consider the same expansion but this time the constant external pressure of 1 ATM?

What is the relation between electrochemical cell and Gibbs free energy of the cell reaction?

2.48 g of Na2S2O3. xH2O is dissolved per litre of solution. 20 mL of this solution required 10 mL of 0.01 M iodine solution for a complete reaction. What is the value of x?

What is the valency factor for bases in a given reaction?

Dipole moment of which ketone is maximum?

Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal Carbonates is most stable thermally? (a) MgCO3 (b) CaCO3 (c) SrCO3 (d) BaCO3

From the stability constants (hypothetical values) given below, predict which one is the strongest ligand?

If the photon of the wavelength 150 pm strikes an atom and one of its inner bound electrons is ejected out with a velocity of 1.5 × 107ms–1, calculate the energy with which it is bound to the nucleus.

How histamine acts as potent vasodilator?

What are the compositions in talc?

The boiling point of C6H6 , CH3OH, C6H5NH2 and C6H5NO2 are 800C, 650C, 1840C and 2120C respectively. Which among them will show highest vapour pressure at room temperature?

The first order rate constant for the decomposition of N2O5 is 6.2 x 10-4 sec-1. The t1/2 of the decomposition reaction is

At CMC, the surfactant molecules

18 g of steam is passed over 2 g of iron.H2O + Fe → H2 + Fe2O3. is the excessive reagent? [Fe = 56 g]

An AB2 type structure is found in

Which one of the following ionic species has the greatest proton affinity to form stable compound?

Gold dissolves in aqua regia to give:

Phenol on treatment with bromine water gives:

The nucleus of the element having atomic number 25 and atomic weight 55 -will contain

In lab H2O2 is prepared by

The mole fraction of the solute in one molal aqueous solution is

5 g of pyrolusite (impure MnO2) was heated with conc. HCl and Cl2 evolved was passed through excess of KI solution. The iodine liberated required 40 mL of N10 hypo solution. Find the % of MnO2 in the pyrolusite (atomic mas of Mn = 55 amu).

What are the bonds formed between metals and non-metals?

For the reaction CO(g)+H2O(g)⇌CO2(g)+H2(g) at a given temperature, the equilibrium amount of CO2(g) can be increased by

Give the structure of ‘A’ in the following reaction.

Highest size will be of

Considering complete ionization, Van't Hoff factor of Ca(NO3)2 is:

Which of the following salt has the same value of van't Hoff factor i as that of K4[Fe(CN)6]

MetalM + N2 heat−−−→ Nitride H2O−−−→ NH3, Metal M is

Find the percentage of P2O5 in (NH4)2HPO4

What is the difference between all the possible aldol products formed by ethanal and propanal with dilute NaOH and their corresponding dehydrated α,β unsaturated aldehydes?

Match the following coloumnIcoloumnII(I)(NH4)2SO4(P)h=√KHC(II)KCl(Q)PH=12[pKw+pKa+logc](III)(CH3)COOK(R)KH=KwKa∗Kb(IV)(NH4)2S(S)[H+]=[OH−]

Identify 'Z' in the following sequence of reactions of ethanol PBrs−−−→Xalc.KOH−−−−−→Yi)conc.H2SO4−−−−−−−−→ii) H2O,ΔZ

On addition of AgNO3 slowly to 0.1 M each of NaCl and NaBr in a solution, what percentage of Br− ions get precipitated when Cl− ion starts precipitating ? KSP(AgCl)=1.0×10−10 KSP(AgBr)=1×10−13

A condensation polymer among the following polymers is

Calculate the molarity and molality of 93% H2SO4(w/v). The density of the solution is 1.84 g/mL.