46295 + Interview Questions in Chemistry

1.	A 5% (w/V) solution of cane sugar is isotonic with 0.878% (w/V) solution of urea. Calculate the molecular mass of urea if the molecular mass of cane sugar is 342 g mol−1.
Answer» A $5 % (w / V)$ solution of cane sugar is isotonic with $0.878 % (w / V)$ solution of urea. Calculate the molecular mass of urea if the molecular mass of cane sugar is $342 {g mol}^{- 1}$ .

Discussion

2.	If the number of subset of set A exceeds 32 by the number of subset of set B find the number of elements in set A and B.
Answer» If the number of subset of set A exceeds 32 by the number of subset of set B find the number of elements in set A and B.

Discussion

3.	At what temperature is the root mean square speed of N2 gas equal to that of propane gas at 440 K?
Answer» At what temperature is the root mean square speed of $N_{2}$ gas equal to that of propane gas at $440 K$ ?

Discussion

4.	In BCC configuration any 3 fold axis is removed then percentage void is?
Answer» In BCC configuration any 3 fold axis is removed then percentage void is?

Discussion

5.	Explain chloro-alkali process with diagram
Answer» Explain chloro-alkali process with diagram

Discussion

6.	What is phase why pvc coating done in wire
Answer» What is phase why pvc coating done in wire

Discussion

7.	What is the mass of 10 moles of sodium sulphite (Na2SO3)?
Answer» What is the mass of 10 moles of sodium sulphite $(N a_{2} S O_{3})$ ?

Discussion

8.	Why is the slope negative what does it mean in a reaction
Answer» Why is the slope negative what does it mean in a reaction

Discussion

9.	what is the minimum volume of water required to dissolve 1g of calcium sulphate at 298 k
Answer» what is the minimum volume of water required to dissolve 1g of calcium sulphate at 298 k

Discussion

10.	Write short notes on crushing and grinding.
Answer» Write short notes on crushing and grinding.

Discussion

11.	In an ideal solution graph why P°b is smaller than P°a?
Answer» In an ideal solution graph why P°b is smaller than P°a?

Discussion

12.	Number of Nitrogen atoms present in 1.4 g of N2 is ?
Answer» Number of Nitrogen atoms present in 1.4 g of N2 is ?

Discussion

13.	ntFor a diatomic molecule the dipole moment is 1.2D and bond length is 1 angstrom. calculate the charge fraction on each atom.n nta) 12%n ntb) 25%n
Answer» ntFor a diatomic molecule the dipole moment is 1.2D and bond length is 1 angstrom. calculate the charge fraction on each atom.n nta) 12%n ntb) 25%n

Discussion

14.	An organic acid P C11H12O2 can easily be oxidized to a dibasic acid which reacts with ethylene glycol to produce a polymer dacron. Upon ozonolysis, P gives an aliphatic ketone as one of the products. P undergoes the following reaction sequences to furnish R via Q. The compound P also undergoes another set of reactions to produce S.The compound R is :
Answer» An organic acid P $C_{11} H_{12} O_{2}$ can easily be oxidized to a dibasic acid which reacts with ethylene glycol to produce a polymer dacron. Upon ozonolysis, P gives an aliphatic ketone as one of the products. P undergoes the following reaction sequences to furnish R via Q. The compound P also undergoes another set of reactions to produce S. The compound R is :

Discussion

15.	What are the electrolytes in body ?
Answer» What are the electrolytes in body ?

Discussion

16.	The transition metal used as a catalyst is:
Answer» The transition metal used as a catalyst is:

Discussion

17.	36. Number of tetrahedral angles in CH4 molecule is
Answer» 36. Number of tetrahedral angles in CH4 molecule is

Discussion

18.	3.92 g/L of a sample of ferrous ammonium sulphate (FeSO4.(NH4)2SO4.6H2O) reacts completely with 50 mL N10KMnO4 solution. The percentage purity of the sample is :
Answer» $3.92 g / L$ of a sample of ferrous ammonium sulphate $(F e S O_{4} . (N H_{4})_{2} S O_{4} . 6 H_{2} O)$ reacts completely with $50 m L \frac{N}{10} K M n O_{4}$ solution. The percentage purity of the sample is :

Discussion

19.	A solution is obtained by dissolving 0.2 moles of urea in a litre of water. Another solution is obtained by dissolving 0.4 moles of cane sugar. The lowering of vapour pressure of the first solution is
Answer» A solution is obtained by dissolving 0.2 moles of urea in a litre of water. Another solution is obtained by dissolving 0.4 moles of cane sugar. The lowering of vapour pressure of the first solution is

Discussion

20.	Write the IUPAC nomenclature of the following compounds and mention the functional groups present: i. (CH3)2 C(Br)CH(CH3)2 ii. CH3CH(Cl)COOH iii. HOOCCH2CH(CH3)CH=CH2 iv. CH3CH2CH(OH)COOC2H5 v. CH3OCH2CH(CH3)COOH vi. CH3CH(CH3)CH2N(CH3)2 vii. H2NCOCH2C CCH2OH ≡ viii. CH3CH2CH(CH3)CH2COOCH3 Ix. CH3COCHO X. CHOCH2CH2COOH
Answer» Write the IUPAC nomenclature of the following compounds and mention the functional groups present: i. (CH3)2 C(Br)CH(CH3)2 ii. CH3CH(Cl)COOH iii. HOOCCH2CH(CH3)CH=CH2 iv. CH3CH2CH(OH)COOC2H5 v. CH3OCH2CH(CH3)COOH vi. CH3CH(CH3)CH2N(CH3)2 vii. H2NCOCH2C CCH2OH ≡ viii. CH3CH2CH(CH3)CH2COOCH3 Ix. CH3COCHO X. CHOCH2CH2COOH

Discussion

21.	Which of the following can be used to remove temporary hardness of water?
Answer» Which of the following can be used to remove temporary hardness of water?

Discussion

22.	4. the concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm, and 0.2 ppm, respectively. the water is unsuitable for drinking due to high concentration of 1/ lead 2. nitrate 3. iron 4. fluoride
Answer» 4. the concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm, and 0.2 ppm, respectively. the water is unsuitable for drinking due to high concentration of 1/ lead 2. nitrate 3. iron 4. fluoride

Discussion

23.	Polythene is prepared from which monomer?
Answer» Polythene is prepared from which monomer?

Discussion

24.	[1 Mark]
Answer» [1 Mark]

Discussion

25.	Chlorobenzene with HNO3 gives
Answer» Chlorobenzene with HNO3 gives

Discussion

26.	(a) Based on the nature of intermolecular forces, classify the following solids: Silicon carbide, Argon (b) ZnO turns yellow on heating. Why? (c) What is meant by groups 12 - 16 compounds? Give an example.
Answer» (a) Based on the nature of intermolecular forces, classify the following solids: Silicon carbide, Argon (b) ZnO turns yellow on heating. Why? (c) What is meant by groups 12 - 16 compounds? Give an example.

Discussion

27.	The greater the surface area of the liquid, ___ is the rate of evaporation.
Answer» The greater the surface area of the liquid, ___ is the rate of evaporation.

Discussion

28.	What is the stoichiometric coefficient of Al3+ in the reaction? Ca+Al3+→Ca2++Al
Answer» What is the stoichiometric coefficient of $A l^{3 +}$ in the reaction? $C a + A l^{3 +} \to C a^{2 +} + A l$

Discussion

29.	The correct order of increasing dipole moments is:
Answer» The correct order of increasing dipole moments is:

Discussion

30.	29. Xdy/dx=y(logy-logx+1)
Answer» 29. Xdy/dx=y(logy-logx+1)

Discussion

31.	20ml each of oxygen and hydrogen and 10ml of carbon monoxide are exploded in a enclosure What will be the volume and composition of the gases when they are cooled to room temperature and pressure
Answer» 20ml each of oxygen and hydrogen and 10ml of carbon monoxide are exploded in a enclosure What will be the volume and composition of the gases when they are cooled to room temperature and pressure

Discussion

32.	45. Mass of moving electron?
Answer» 45. Mass of moving electron?

Discussion

33.	What is crystal field splitting energy? How does the magnitude of Δo decide the actual configuration of d-orbitals in a coordination entity?
Answer» What is crystal field splitting energy? How does the magnitude of Δ_o decide the actual configuration of d-orbitals in a coordination entity?

Discussion

34.	Uranium on reaction with water forms
Answer» Uranium on reaction with water forms

Discussion

35.	When an acidified solution of Na2MoOn (atomic mass 96) is electrolysed , O2 gas is liberated corresponding to a volume of 0.112 L at STP and mass of Mo deposited is 0.32 g . then the formula of the salt and oxidation state of Mo is 1) Na2MoO, 0 2) Na2MoO4, 6 3) Na2MoO2, +2 4) Na2MoO3, +4
Answer» When an acidified solution of Na2MoOn (atomic mass 96) is electrolysed , O2 gas is liberated corresponding to a volume of 0.112 L at STP and mass of Mo deposited is 0.32 g . then the formula of the salt and oxidation state of Mo is 1) Na2MoO, 0 2) Na2MoO4, 6 3) Na2MoO2, +2 4) Na2MoO3, +4

Discussion

36.	2HI=H2+I2 ( reversible reaction) 2 moles of HI is introduced in 1 litre container. If 60% of HI is decomposed and attain the equilibrium, find the value of Kc.
Answer» 2HI=H2+I2 ( reversible reaction) 2 moles of HI is introduced in 1 litre container. If 60% of HI is decomposed and attain the equilibrium, find the value of Kc.

Discussion

37.	An endothermic reaction is non-spontaneous at freezing point of water and becomes feasible at its boiling point, then
Answer» An endothermic reaction is non-spontaneous at freezing point of water and becomes feasible at its boiling point, then

Discussion

38.	44 At 80C, the vapour pressure of pure liquid A is 520 mm of Hg and that of pure liquid B is 1000 mm of Hg if a mixture of A and B boils at 80C and 1 atm pressure, the amount of A in the mixture is (1) 50 mol% (2) 52 mol% (3) 34 mol % (4) 48 mol %
Answer» 44 At 80C, the vapour pressure of pure liquid A is 520 mm of Hg and that of pure liquid B is 1000 mm of Hg if a mixture of A and B boils at 80C and 1 atm pressure, the amount of A in the mixture is (1) 50 mol% (2) 52 mol% (3) 34 mol % (4) 48 mol %

Discussion

39.	Deacons process is used for the preparation of:[0.77 Mark]
Answer» Deacons process is used for the preparation of: [0.77 Mark]

Discussion

40.	Which of the following is/are obtained when ozone reacts with potassium iodide in aneutral medium?
Answer» Which of the following is/are obtained when ozone reacts with potassium iodide in aneutral medium?

Discussion

41.	What will happen if cement is not used in making concrete?
Answer» What will happen if cement is not used in making concrete?

Discussion

42.	The Henry's law constant for the solubility of N2 gas in water at 298 K is 1.0×105 atm. The mole fraction of N2 in air is 0.8. The number of moles of N2 from air dissolved in 10 moles of water at 298 K and 5 atmospheric pressure is x×10−y. Find the value of xy.
Answer» The Henry's law constant for the solubility of $N_{2}$ gas in water at $298 K$ is $1.0 \times 10^{5} a t m$ . The mole fraction of $N_{2}$ in air is $0.8$ . The number of moles of $N_{2}$ from air dissolved in $10$ moles of water at $298 K$ and $5$ atmospheric pressure is $x \times 10^{- y}$ . Find the value of $\frac{x}{y}$ .

Discussion

43.	An element is represented by ZXA, where Z is atomic number which is also equal to number of proton, A is mass number and X is symbol of the element. Mass number (A) = Number of protons (Z) + Number of neutrons. Isoelectronic: Species/ elements having same number of electron Isodiaphers: Elements having same value of \|(A−2Z)\| Isotopes: Atoms having same number of proton Which of the following is a pair of isodiaphers?
Answer» An element is represented by $_{Z} X^{A}$ , where Z is atomic number which is also equal to number of proton, A is mass number and X is symbol of the element. Mass number (A) = Number of protons (Z) + Number of neutrons. Isoelectronic: Species/ elements having same number of electron Isodiaphers: Elements having same value of $\| (A - 2 Z) \|$ Isotopes: Atoms having same number of proton Which of the following is a pair of isodiaphers?

Discussion

44.	By what factor would the specific rate of a first order reaction increase, if the temperature is increased from 27 ∘C to 47 ∘C. The activation energy for the reaction is 55.776 kJmol−1. (Take ln2=0.7, R(gas const)=8.3 J/(mol.K)−1)
Answer» By what factor would the specific rate of a first order reaction increase, if the temperature is increased from $27^{\circ} C$ to $47^{\circ} C$ . The activation energy for the reaction is $55.776 k J m o l^{- 1}$ . (Take $l n 2 = 0.7, R (g a s c o n s t) = 8.3 J / (m o l . K)^{- 1})$

Discussion

45.	Enthalpy of combustion of carbon, hydrogen and C3H8 are x1,x2 and x3 mol−1 respectively. Estimate the enthalpy of formation of C3H8
Answer» Enthalpy of combustion of carbon, hydrogen and $C_{3} H_{8}$ are $x_{1}, x_{2}$ and $x_{3} m o l^{- 1}$ respectively. Estimate the enthalpy of formation of $C_{3} H_{8}$

Discussion

46.	Consider an isothermal reversible compression of 1 mole of an ideal gas in which pressure of the system increased from 5 atm to 30 atm at 300 K. The entropy change (in kJ) of the surrounding is: (R=8.314 Jmol−1K−1)
Answer» Consider an isothermal reversible compression of 1 mole of an ideal gas in which pressure of the system increased from 5 atm to 30 atm at 300 K. The entropy change (in kJ) of the surrounding is: ( $R = 8.314 J m o l^{- 1} K^{- 1}$ )

Discussion

47.	Who invented Chemistry?
Answer» Who invented Chemistry?

Discussion

48.	Number of Fe atoms in 100 g Haemoglobin if it contains 0.33% Fe. (Atomic mass of Fe=56
Answer» Number of Fe atoms in 100 g Haemoglobin if it contains 0.33% Fe. (Atomic mass of Fe=56

Discussion

49.	The vapour pressure of a solution of liquid A and liquid B is 600 torr. The mole fraction of component A in liquid phase is 0.7. The vapour pressure of pure A and B are respectively
Answer» The vapour pressure of a solution of liquid A and liquid B is 600 torr. The mole fraction of component A in liquid phase is 0.7. The vapour pressure of pure A and B are respectively

Discussion

50.	Nitric acid (HNO3), also known as aqua fortis (Latin for "strong water") or spirit of niter, is a highly corrosive mineral acid. Nitric acid reacts with most metals, but the details depend on the concentration of the acid and the nature of the metal. List-I contains chemical reactions of metals with HNO3 and List-II contains the compound(s) formed. List−IList−II(I)Ca with dilute and cold HNO3(P)Metal nitrate(II)As with concentrated HNO3(Q)NO(III)Zn with dilute HNO3(R)NO2(IV)Cu with dilute HNO3(S)N2O(T)Tribasic acid(U)Hydrogen gas Which of the following options has the correct combination considering List-I and List-II?
Answer» Nitric acid $(H N O_{3}),$ also known as aqua fortis (Latin for "strong water") or spirit of niter, is a highly corrosive mineral acid. Nitric acid reacts with most metals, but the details depend on the concentration of the acid and the nature of the metal. List-I contains chemical reactions of metals with $H N O_{3}$ and List-II contains the compound(s) formed. $\begin{matrix} L i s t - I & L i s t - I I (I) & Ca with dilute and cold H N O_{3} & (P) & Metal nitrate (I I) & As with concentrated H N O_{3} & (Q) & N O (I I I) & Zn with dilute H N O_{3} & (R) & N O_{2} (I V) & Cu with dilute H N O_{3} & (S) & N_{2} O (T) & Tribasic acid (U) & Hydrogen gas \end{matrix}$ Which of the following options has the correct combination considering List-I and List-II?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A 5% (w/V) solution of cane sugar is isotonic with 0.878% (w/V) solution of urea. Calculate the molecular mass of urea if the molecular mass of cane sugar is 342 g mol−1.

If the number of subset of set A exceeds 32 by the number of subset of set B find the number of elements in set A and B.

At what temperature is the root mean square speed of N2 gas equal to that of propane gas at 440 K?

In BCC configuration any 3 fold axis is removed then percentage void is?

Explain chloro-alkali process with diagram

What is phase why pvc coating done in wire

What is the mass of 10 moles of sodium sulphite (Na2SO3)?

Why is the slope negative what does it mean in a reaction

what is the minimum volume of water required to dissolve 1g of calcium sulphate at 298 k

Write short notes on crushing and grinding.

In an ideal solution graph why P°b is smaller than P°a?

Number of Nitrogen atoms present in 1.4 g of N2 is ?

ntFor a diatomic molecule the dipole moment is 1.2D and bond length is 1 angstrom. calculate the charge fraction on each atom.n nta) 12%n ntb) 25%n

What are the electrolytes in body ?

The transition metal used as a catalyst is:

36. Number of tetrahedral angles in CH4 molecule is

3.92 g/L of a sample of ferrous ammonium sulphate (FeSO4.(NH4)2SO4.6H2O) reacts completely with 50 mL N10KMnO4 solution. The percentage purity of the sample is :

A solution is obtained by dissolving 0.2 moles of urea in a litre of water. Another solution is obtained by dissolving 0.4 moles of cane sugar. The lowering of vapour pressure of the first solution is

Which of the following can be used to remove temporary hardness of water?

4. the concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm, and 0.2 ppm, respectively. the water is unsuitable for drinking due to high concentration of 1/ lead 2. nitrate 3. iron 4. fluoride

Polythene is prepared from which monomer?

[1 Mark]

Chlorobenzene with HNO3 gives

(a) Based on the nature of intermolecular forces, classify the following solids: Silicon carbide, Argon (b) ZnO turns yellow on heating. Why? (c) What is meant by groups 12 - 16 compounds? Give an example.

The greater the surface area of the liquid, ___ is the rate of evaporation.

What is the stoichiometric coefficient of Al3+ in the reaction? Ca+Al3+→Ca2++Al

The correct order of increasing dipole moments is:

29. Xdy/dx=y(logy-logx+1)

20ml each of oxygen and hydrogen and 10ml of carbon monoxide are exploded in a enclosure What will be the volume and composition of the gases when they are cooled to room temperature and pressure

45. Mass of moving electron?

What is crystal field splitting energy? How does the magnitude of Δo decide the actual configuration of d-orbitals in a coordination entity?

Uranium on reaction with water forms

When an acidified solution of Na2MoOn (atomic mass 96) is electrolysed , O2 gas is liberated corresponding to a volume of 0.112 L at STP and mass of Mo deposited is 0.32 g . then the formula of the salt and oxidation state of Mo is 1) Na2MoO, 0 2) Na2MoO4, 6 3) Na2MoO2, +2 4) Na2MoO3, +4

2HI=H2+I2 ( reversible reaction) 2 moles of HI is introduced in 1 litre container. If 60% of HI is decomposed and attain the equilibrium, find the value of Kc.

An endothermic reaction is non-spontaneous at freezing point of water and becomes feasible at its boiling point, then

44 At 80C, the vapour pressure of pure liquid A is 520 mm of Hg and that of pure liquid B is 1000 mm of Hg if a mixture of A and B boils at 80C and 1 atm pressure, the amount of A in the mixture is (1) 50 mol% (2) 52 mol% (3) 34 mol % (4) 48 mol %

Deacons process is used for the preparation of:[0.77 Mark]

Which of the following is/are obtained when ozone reacts with potassium iodide in aneutral medium?

What will happen if cement is not used in making concrete?

The Henry's law constant for the solubility of N2 gas in water at 298 K is 1.0×105 atm. The mole fraction of N2 in air is 0.8. The number of moles of N2 from air dissolved in 10 moles of water at 298 K and 5 atmospheric pressure is x×10−y. Find the value of xy.

By what factor would the specific rate of a first order reaction increase, if the temperature is increased from 27 ∘C to 47 ∘C. The activation energy for the reaction is 55.776 kJmol−1. (Take ln2=0.7, R(gas const)=8.3 J/(mol.K)−1)

Enthalpy of combustion of carbon, hydrogen and C3H8 are x1,x2 and x3 mol−1 respectively. Estimate the enthalpy of formation of C3H8

Consider an isothermal reversible compression of 1 mole of an ideal gas in which pressure of the system increased from 5 atm to 30 atm at 300 K. The entropy change (in kJ) of the surrounding is: (R=8.314 Jmol−1K−1)

Who invented Chemistry?

Number of Fe atoms in 100 g Haemoglobin if it contains 0.33% Fe. (Atomic mass of Fe=56

The vapour pressure of a solution of liquid A and liquid B is 600 torr. The mole fraction of component A in liquid phase is 0.7. The vapour pressure of pure A and B are respectively