46295 + Interview Questions in Chemistry

1.	The hybridization of P is PO3−4 is the same as of:
Answer» The hybridization of $P$ is $P O_{4}^{3 -}$ is the same as of:

Discussion

2.	Which compound is zero valency metal complex
Answer» Which compound is zero valency metal complex

Discussion

3.	A bulb emits light of wavelength 198 nm. The bulb is rated as 100 watt and 10% of the energy is emitted as light. The number of photons emitted per second is 10x. Take h=6.6×10−34. The value of x is
Answer» A bulb emits light of wavelength 198 nm. The bulb is rated as 100 watt and 10% of the energy is emitted as light. The number of photons emitted per second is $10^{x}$ . Take $h = 6.6 \times 10^{- 34}$ . The value of $x$ is

Discussion

4.	Mean free path is defined as –
Answer» Mean free path is defined as –

Discussion

5.	Boiling point of water of 750 mm Hg is 99.63∘C. How much sucrose is to be added to 500 g of water such that it boils at 100.02∘C? Molar elevation constant for water is 0.52 Kkgmol−1.
Answer» Boiling point of water of $750 mm Hg$ is ${99.63}^{\circ} C$ . How much sucrose is to be added to $500 g$ of water such that it boils at ${100.02}^{\circ} C$ ? Molar elevation constant for water is $0.52 {Kkgmol}^{- 1}$ .

5.

Boiling point of water of 750 mm Hg is 99.63∘C. How much sucrose is to be added to 500 g of water such that it boils at 100.02∘C? Molar elevation constant for water is 0.52 Kkgmol−1.

Answer»

Boiling point of water of $750 mm Hg$ is ${99.63}^{\circ} C$ . How much sucrose is to be added to $500 g$ of water such that it boils at ${100.02}^{\circ} C$ ?

Molar elevation constant for water is $0.52 {Kkgmol}^{- 1}$ .

Discussion

6.	The blue colour produced on adding H2O2 to acidified K2Cr2O7 is due to the formation of:
Answer» The blue colour produced on adding $H_{2} O_{2}$ to acidified $K_{2} C r_{2} O_{7}$ is due to the formation of:

Discussion

7.	The prefix and suffix used for -OH are respectively
Answer» The prefix and suffix used for -OH are respectively

Discussion

8.	The relative adsorption of each component of the mixture is expressed in terms of
Answer» The relative adsorption of each component of the mixture is expressed in terms of

Discussion

9.	The de Broglie wavelength of 1 mg grain of sand blown by a 20 m/s wind (approxiamately) is:
Answer» The de Broglie wavelength of 1 mg grain of sand blown by a 20 m/s wind (approxiamately) is:

Discussion

10.	Henry’s law constant for the solubility of N2 gas in water at 298K is 1.0×105 atm. The molefraction of N2 in air is 0.6. The number of moles of N2 from air dissolved in 10 moles of water at 298K and 5 atm pressure is
Answer» Henry’s law constant for the solubility of $N_{2}$ gas in water at 298K is $1.0 \times 10^{5}$ atm. The molefraction of $N_{2}$ in air is 0.6. The number of moles of $N_{2}$ from air dissolved in 10 moles of water at 298K and 5 atm pressure is

Discussion

11.	Among the following, which is the most reactive towards alcoholic KOH
Answer» Among the following, which is the most reactive towards alcoholic KOH

Discussion

12.	Match the items listed under column I with examples given under column II and choose the right answer which gives the correct combination of alphabets of the two columns. Column I ItemsColumn II ExamplesAConjugated proteinseChitinBSimple proteinsfNucleoproteinsCDerived proteinsgHistonesProteoses
Answer» Match the items listed under column I with examples given under column II and choose the right answer which gives the correct combination of alphabets of the two columns. $\begin{matrix} Column I Items & Column II Examples A & Conjugated proteins & e & Chitin B & Simple proteins & f & Nucleoproteins C & Derived proteins & g & Histones Proteoses \end{matrix}$

12.

Match the items listed under column I with examples given under column II and choose the right answer which gives the correct combination of alphabets of the two columns. Column I ItemsColumn II ExamplesAConjugated proteinseChitinBSimple proteinsfNucleoproteinsCDerived proteinsgHistonesProteoses

Answer»

Match the items listed under column I with examples given under column II and choose the right answer which gives the correct combination of alphabets of the two columns.

$\begin{matrix} Column I Items & Column II Examples A & Conjugated proteins & e & Chitin B & Simple proteins & f & Nucleoproteins C & Derived proteins & g & Histones Proteoses \end{matrix}$

Discussion

13.	One mole of an ideal monoatomic gas undergoes a cyclic process 'abca' as shown in figure. If U denotes the internal energy and W the work done by the gas. Then choose the incorrect altenative (s)
Answer» One mole of an ideal monoatomic gas undergoes a cyclic process 'abca' as shown in figure. If $U$ denotes the internal energy and $W$ the work done by the gas. Then choose the incorrect altenative (s)

Discussion

14.	Why is Cr+2 more reducing than Fe+2?
Answer» Why is $C r^{+ 2}$ more reducing than $F e^{+ 2}$ ?

Discussion

15.	Hydrazine (N2H4) can be produced according to the following reaction: ClNH2+2NH3→N2H4+NH4Cl. 1 kg of ClNH2 is reacted with excess NH3, find the actual number of molecules of N2H4 produced if the percentage yield of the given reaction is 76%.
Answer» Hydrazine $(N_{2} H_{4})$ can be produced according to the following reaction: $C l N H_{2} + 2 N H_{3} \to N_{2} H_{4} + N H_{4} C l$ . 1 kg of $C l N H_{2}$ is reacted with excess $N H_{3}$ , find the actual number of molecules of $N_{2} H_{4}$ produced if the percentage yield of the given reaction is 76%.

Discussion

16.	VAGARY
Answer» VAGARY

Discussion

17.	How many moles of KMnO4 are reacted with one mole of ferrous oxalate in an acidic medium?
Answer» How many moles of $K M n O_{4}$ are reacted with one mole of ferrous oxalate in an acidic medium?

Discussion

18.	Calculate the ph of 0.005M h2so4 solution ?
Answer» Calculate the ph of 0.005M h2so4 solution ?

Discussion

19.	The only cations present in a slightly acidic solution areFe3+,Zn2+ and Cu2+. The reagent, added in excess to this solution, that would identify and separate Fe3+ in one step is:
Answer» The only cations present in a slightly acidic solution are $F e^{3 +}, Z n^{2 +} a n d C u^{2 +}$ . The reagent, added in excess to this solution, that would identify and separate $F e^{3 +}$ in one step is:

Discussion

20.	National Air quality index was recently launched. Consider the following statements in this regard. Which of the above statements is/ are correct
Answer» National Air quality index was recently launched. Consider the following statements in this regard. Which of the above statements is/ are correct

20.

National Air quality index was recently launched. Consider the following statements in this regard. Which of the above statements is/ are correct

Answer»

National Air quality index was recently launched. Consider the following statements in this regard.

Which of the above statements is/ are correct

Discussion

21.	If two solutions have the same osmolarity they are said to be
Answer» If two solutions have the same osmolarity they are said to be

Discussion

22.	Calculate the amount of CaCl2 (molar mass = 111 g mol−1) which must be added to 500 g of water to lower its freezing point by 2 K, assuming CaCl2 is completely dissociated. (Kf for water = 1.86 K kg mol−1)
Answer» Calculate the amount of $C a C l_{2}$ (molar mass = 111 g $m o l^{- 1}$ ) which must be added to 500 g of water to lower its freezing point by 2 K, assuming $C a C l_{2}$ is completely dissociated. ( $K_{f}$ for water = 1.86 K kg $m o l^{- 1}$ )

Discussion

23.	Calculate the number of moles of electrons present in 54.6 g of electrons. (Take NA=6×1023)
Answer» Calculate the number of moles of electrons present in $54.6 g$ of electrons. (Take $N_{A} = 6 \times 10^{23}$ )

Discussion

24.	For which of the following elements it is difficult to disproportionate in +3 oxidation state?
Answer» For which of the following elements it is difficult to disproportionate in +3 oxidation state?

Discussion

25.	What will be the osmotic pressure of 0.1 M monobasic acid, its pH is 2 at 25∘C?
Answer» What will be the osmotic pressure of 0.1 M monobasic acid, its pH is 2 at $25^{\circ}$ C?

Discussion

26.	A definite amount of a gaseous hydrocarbon having less than 5 carbon atoms was burned with sufficient amount of O2 at a very high temperature. The volume of all reactants was 600 ml, after the explosion the volume of the products was found to be 700 ml under the similar conditions. What is the molecular formula of the compound?
Answer» A definite amount of a gaseous hydrocarbon having less than 5 carbon atoms was burned with sufficient amount of $O_{2}$ at a very high temperature. The volume of all reactants was 600 ml, after the explosion the volume of the products was found to be 700 ml under the similar conditions. What is the molecular formula of the compound?

Discussion

27.	Name the oxometal anions of the first series of the transition metals in which the metal exhibits the oxidation state equal to its group number.
Answer» Name the oxometal anions of the first series of the transition metals in which the metal exhibits the oxidation state equal to its group number.

Discussion

28.	The surface of copper gets tarnished by the formation of copper oxide. N2 gas was passed to prevent the oxide formation during heating of copper at 1250 K. However, the N2 gas contains 1 mole % of water vapour as impurity. The water vapour oxidises copper as per the reaction given below: 2Cu(s)+H2O(g)→Cu2O(s)+H2(g). PH2 is the minimum partial pressure of H2 (in bar) needed to prevent the oxidation at 1250 K. The value of ln(PH2) is (Given: total pressure =1 bar, R (universal gas constant) =8JK−1mol−1, ln(10)=2.3. Cu(s) and Cu2O(s) are mutually immiscible. At 1250K:2Cu(s)+12O2(g)→Cu2O(s);ΔG∘=−78,000Jmol−1 H2(g)+12O2(g)→H2O(g);ΔG∘=−1,78,000Jmol−1;G is the Gibbs energy)
Answer» The surface of copper gets tarnished by the formation of copper oxide. $N_{2}$ gas was passed to prevent the oxide formation during heating of copper at 1250 K. However, the $N_{2}$ gas contains 1 mole % of water vapour as impurity. The water vapour oxidises copper as per the reaction given below: $2 C u (s) + H_{2} O (g) \to C u_{2} O (s) + H_{2} (g)$ . $P_{H_{2}}$ is the minimum partial pressure of $H_{2}$ (in bar) needed to prevent the oxidation at 1250 K. The value of $l n (P_{H_{2}})$ is (Given: total pressure =1 bar, R (universal gas constant) $= 8 J K^{- 1} m o l^{- 1}$ , ln(10)=2.3. Cu(s) and $C u_{2} O (s)$ are mutually immiscible. At $1250 K : 2 C u (s) + \frac{1}{2} O_{2} (g) \to C u_{2} O (s); Δ G^{\circ} = - 78, 000 J m o l^{- 1}$ $H_{2} (g) + \frac{1}{2} O_{2} (g) \to H_{2} O (g); Δ G^{\circ} = - 1, 78, 000 J m o l^{- 1}; G$ is the Gibbs energy)

Discussion

29.	Magnetic moment 2.84 B.M. is given by (At. nos. Ni = 28, Ti = 22, Cr = 24, Co = 27)
Answer» Magnetic moment 2.84 B.M. is given by (At. nos. Ni = 28, Ti = 22, Cr = 24, Co = 27)

Discussion

30.	One of the most important properties of `d`-block metal cations is the formation of coordinate compounds. Widely used theories that explain bonding in these compounds are valence bond theory and crystal field theory. Which of the following complex ions/compounds is obtained as a racemic mixture on mixing an isomer with its mirror image in 1:1 molar ratio?
Answer» One of the most important properties of `d`-block metal cations is the formation of coordinate compounds. Widely used theories that explain bonding in these compounds are valence bond theory and crystal field theory. Which of the following complex ions/compounds is obtained as a racemic mixture on mixing an isomer with its mirror image in $1 : 1$ molar ratio?

Discussion

31.	Calculate the pH of the resultant mixtures: 10 mL of 0.2M Ca(OH)2 + 25 mL of 0.1M HCl 10 mL of 0.01M H2SO4 + 10 mL of 0.01M Ca(OH)2 10 mL of 0.1M H2SO4 + 10 mL of 0.1M KOH
Answer» Calculate the pH of the resultant mixtures: 10 mL of 0.2M $C a (O H)_{2}$ + 25 mL of 0.1M HCl 10 mL of 0.01M $H_{2} S O_{4}$ + 10 mL of 0.01M $C a (O H)_{2}$ 10 mL of 0.1M $H_{2} S O_{4}$ + 10 mL of 0.1M KOH

31.

Calculate the pH of the resultant mixtures: 10 mL of 0.2M Ca(OH)2 + 25 mL of 0.1M HCl 10 mL of 0.01M H2SO4 + 10 mL of 0.01M Ca(OH)2 10 mL of 0.1M H2SO4 + 10 mL of 0.1M KOH

Answer»

Calculate the pH of the resultant mixtures:

10 mL of 0.2M $C a (O H)_{2}$ + 25 mL of 0.1M HCl

10 mL of 0.01M $H_{2} S O_{4}$ + 10 mL of 0.01M $C a (O H)_{2}$

10 mL of 0.1M $H_{2} S O_{4}$ + 10 mL of 0.1M KOH

Discussion

32.	(i) Name the starting material used in the industrial preparation of phenol. (ii) Write complete reaction for the bromination of phenol in aqueous and non-aqueous medium. (iii) Explain why Lewis acid is not required in bromination of phenol?
Answer» (i) Name the starting material used in the industrial preparation of phenol. (ii) Write complete reaction for the bromination of phenol in aqueous and non-aqueous medium. (iii) Explain why Lewis acid is not required in bromination of phenol?

32.

(i) Name the starting material used in the industrial preparation of phenol. (ii) Write complete reaction for the bromination of phenol in aqueous and non-aqueous medium. (iii) Explain why Lewis acid is not required in bromination of phenol?

Answer»

(i) Name the starting material used in the industrial preparation of phenol.

(ii) Write complete reaction for the bromination of phenol in aqueous and non-aqueous medium.

(iii) Explain why Lewis acid is not required in bromination of phenol?

Discussion

33.	Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines. CH3(CH2)2NH2
Answer» Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines. $C H_{3} (C H_{2})_{2} N H_{2}$

Discussion

34.	Match the reactions with the reagents to be used for the corresponding conversions.
Answer» Match the reactions with the reagents to be used for the corresponding conversions.

Discussion

35.	The mass of a particle is 10−10 g and its radius is 2×10−4 cm.If its velocity is 10−6 cm s−1 with 0.0001% uncertainity in measurement, the uncertainity in its position is:
Answer» The mass of a particle is $10^{- 10}$ g and its radius is $2 \times 10^{- 4} c m$ .If its velocity is $10^{- 6} c m s^{- 1}$ with 0.0001% uncertainity in measurement, the uncertainity in its position is:

Discussion

36.	XNa(Excess)−−−−−−−→YCH3I(Excess)−−−−−−−−−→ Z. 'Z' forms isomer on hydrogenatio with
Answer» $X N a (E x c e s s) - ------ \to Y C H_{3} I (E x c e s s) - -------- \to$ Z. 'Z' forms isomer on hydrogenatio with

Discussion

37.	The ratio of the dimensions of planck's constant and that of the moment of inertia has the dimensions of
Answer» The ratio of the dimensions of planck's constant and that of the moment of inertia has the dimensions of

Discussion

38.	Which of the following mixtures in aqueous solution acts as a buffer?
Answer» Which of the following mixtures in aqueous solution acts as a buffer?

Discussion

39.	Some non-metals when treated with NaOH disproportionate. They may be: (i) P4 (ii) S8 (iii) Cl2
Answer» Some non-metals when treated with $N a O H$ disproportionate. They may be: (i) $P_{4}$ (ii) $S_{8}$ (iii) $C l_{2}$

Discussion

40.	Out of the following metals, which will give H2 on reaction with NaOH? I. Zn II. Mg III. Al IV. Be
Answer» Out of the following metals, which will give $H_{2}$ on reaction with $N a O H$ ? $I . Z n I I . M g$ $I I I . A l I V . B e$

Discussion

41.	Normal cells in our body show a property known as "contact inhibition" but cancerous cells have lost this property. What makes the cell to have in contact with the other cells. Whether it is an hormone or a enzyme. Something "that" is absent in cancerous cells?
Answer» Normal cells in our body show a property known as "contact inhibition" but cancerous cells have lost this property. What makes the cell to have in contact with the other cells. Whether it is an hormone or a enzyme. Something "that" is absent in cancerous cells?

Discussion

42.	Sort the following free radicals according to their stability in increasing order.
Answer» Sort the following free radicals according to their stability in increasing order.

Discussion

43.	In an isobaric reversible process, the ratio of heat supplied to the system (dq) and work done by the system (dW) for a ideal monoatomic gas is:
Answer» In an isobaric reversible process, the ratio of heat supplied to the system ( $d q$ ) and work done by the system ( $d W$ ) for a ideal monoatomic gas is:

Discussion

44.	Le Chatelier's principle is not applicable for which of the following reaction?
Answer» Le Chatelier's principle is not applicable for which of the following reaction?

Discussion

45.	P−χ curve for a non-ideal liquid mixture is given (see figure). Identify the correct T−χ curve for the same mixture.
Answer» $P - χ$ curve for a non-ideal liquid mixture is given (see figure). Identify the correct $T - χ$ curve for the same mixture.

Discussion

46.	Which of the following is a polar compound?
Answer» Which of the following is a polar compound?

46.

Which of the following is a polar compound?

Answer»

Which of the following is a polar compound?

Discussion

47.	The compound which reacts fastest with Lucas reagent at room temperature is
Answer» The compound which reacts fastest with Lucas reagent at room temperature is

Discussion

48.	How many oxygen atoms are shared among the tetrahedron of a silicate anion in the mineral beryl?
Answer» How many oxygen atoms are shared among the tetrahedron of a silicate anion in the mineral beryl?

Discussion

49.	calculate the number of water molecules in a liter of water. Assume the density of water to be 1kg/dm^3
Answer» calculate the number of water molecules in a liter of water. Assume the density of water to be 1kg/dm^3

Discussion

50.	Why does cloromethane(CH3Cl) have more dipole moment than chloroform (CHCl3)?
Answer» Why does cloromethane(CH3Cl) have more dipole moment than chloroform (CHCl3)?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The hybridization of P is PO3−4 is the same as of:

Which compound is zero valency metal complex

A bulb emits light of wavelength 198 nm. The bulb is rated as 100 watt and 10% of the energy is emitted as light. The number of photons emitted per second is 10x. Take h=6.6×10−34. The value of x is

Mean free path is defined as –

Boiling point of water of 750 mm Hg is 99.63∘C. How much sucrose is to be added to 500 g of water such that it boils at 100.02∘C? Molar elevation constant for water is 0.52 Kkgmol−1.

The blue colour produced on adding H2O2 to acidified K2Cr2O7 is due to the formation of:

The prefix and suffix used for -OH are respectively

The relative adsorption of each component of the mixture is expressed in terms of

The de Broglie wavelength of 1 mg grain of sand blown by a 20 m/s wind (approxiamately) is:

Henry’s law constant for the solubility of N2 gas in water at 298K is 1.0×105 atm. The molefraction of N2 in air is 0.6. The number of moles of N2 from air dissolved in 10 moles of water at 298K and 5 atm pressure is

Among the following, which is the most reactive towards alcoholic KOH

Match the items listed under column I with examples given under column II and choose the right answer which gives the correct combination of alphabets of the two columns. Column I ItemsColumn II ExamplesAConjugated proteinseChitinBSimple proteinsfNucleoproteinsCDerived proteinsgHistonesProteoses

One mole of an ideal monoatomic gas undergoes a cyclic process 'abca' as shown in figure. If U denotes the internal energy and W the work done by the gas. Then choose the incorrect altenative (s)

Why is Cr+2 more reducing than Fe+2?

Hydrazine (N2H4) can be produced according to the following reaction: ClNH2+2NH3→N2H4+NH4Cl. 1 kg of ClNH2 is reacted with excess NH3, find the actual number of molecules of N2H4 produced if the percentage yield of the given reaction is 76%.

VAGARY

How many moles of KMnO4 are reacted with one mole of ferrous oxalate in an acidic medium?

Calculate the ph of 0.005M h2so4 solution ?

The only cations present in a slightly acidic solution areFe3+,Zn2+ and Cu2+. The reagent, added in excess to this solution, that would identify and separate Fe3+ in one step is:

National Air quality index was recently launched. Consider the following statements in this regard. Which of the above statements is/ are correct

If two solutions have the same osmolarity they are said to be

Calculate the amount of CaCl2 (molar mass = 111 g mol−1) which must be added to 500 g of water to lower its freezing point by 2 K, assuming CaCl2 is completely dissociated. (Kf for water = 1.86 K kg mol−1)

Calculate the number of moles of electrons present in 54.6 g of electrons. (Take NA=6×1023)

For which of the following elements it is difficult to disproportionate in +3 oxidation state?

What will be the osmotic pressure of 0.1 M monobasic acid, its pH is 2 at 25∘C?

Name the oxometal anions of the first series of the transition metals in which the metal exhibits the oxidation state equal to its group number.

Magnetic moment 2.84 B.M. is given by (At. nos. Ni = 28, Ti = 22, Cr = 24, Co = 27)

Calculate the pH of the resultant mixtures: 10 mL of 0.2M Ca(OH)2 + 25 mL of 0.1M HCl 10 mL of 0.01M H2SO4 + 10 mL of 0.01M Ca(OH)2 10 mL of 0.1M H2SO4 + 10 mL of 0.1M KOH

(i) Name the starting material used in the industrial preparation of phenol. (ii) Write complete reaction for the bromination of phenol in aqueous and non-aqueous medium. (iii) Explain why Lewis acid is not required in bromination of phenol?

Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines. CH3(CH2)2NH2

Match the reactions with the reagents to be used for the corresponding conversions.

The mass of a particle is 10−10 g and its radius is 2×10−4 cm.If its velocity is 10−6 cm s−1 with 0.0001% uncertainity in measurement, the uncertainity in its position is:

XNa(Excess)−−−−−−−→YCH3I(Excess)−−−−−−−−−→ Z. 'Z' forms isomer on hydrogenatio with

The ratio of the dimensions of planck's constant and that of the moment of inertia has the dimensions of

Which of the following mixtures in aqueous solution acts as a buffer?

Some non-metals when treated with NaOH disproportionate. They may be: (i) P4 (ii) S8 (iii) Cl2

Out of the following metals, which will give H2 on reaction with NaOH? I. Zn II. Mg III. Al IV. Be

Normal cells in our body show a property known as "contact inhibition" but cancerous cells have lost this property. What makes the cell to have in contact with the other cells. Whether it is an hormone or a enzyme. Something "that" is absent in cancerous cells?

Sort the following free radicals according to their stability in increasing order.

In an isobaric reversible process, the ratio of heat supplied to the system (dq) and work done by the system (dW) for a ideal monoatomic gas is:

Le Chatelier's principle is not applicable for which of the following reaction?

P−χ curve for a non-ideal liquid mixture is given (see figure). Identify the correct T−χ curve for the same mixture.

Which of the following is a polar compound?

The compound which reacts fastest with Lucas reagent at room temperature is

How many oxygen atoms are shared among the tetrahedron of a silicate anion in the mineral beryl?

calculate the number of water molecules in a liter of water. Assume the density of water to be 1kg/dm^3

Why does cloromethane(CH3Cl) have more dipole moment than chloroform (CHCl3)?