46295 + Interview Questions in Chemistry

1.	If a carbon compound with 4 carbons in a chain and the 2nd carbon has a doubly bonded oxygen attached to it, what is it called?
Answer» If a carbon compound with 4 carbons in a chain and the $2^{n d}$ carbon has a doubly bonded oxygen attached to it, what is it called?

Discussion

2.	Ziegler - Natta catalyst is used in the preparation of
Answer» Ziegler - Natta catalyst is used in the preparation of

Discussion

3.	Ethyl alcohol is obtained when ethyl chloride is boiled with
Answer» Ethyl alcohol is obtained when ethyl chloride is boiled with

Discussion

4.	Glauber’s salt is
Answer» Glauber’s salt is

Discussion

5.	If the solution boils at a temperature T1 and the solvent at a temperature T2 the elevation of boiling point is given by
Answer» If the solution boils at a temperature T₁ and the solvent at a temperature T₂the elevation of boiling point is given by

Discussion

6.	In a redox reaction, oxidation number of an oxidant:
Answer» In a redox reaction, oxidation number of an oxidant:

Discussion

7.	What is the hybridization of sulphur in its crown ring structure?
Answer» What is the hybridization of sulphur in its crown ring structure?

Discussion

8.	Amino acids can be classified as α−,γ−,δ− and so on depending upon the relative position of an amino group with respect to a carboxyl group. Which type of amino acids forms polypeptide chain in proteins?
Answer» Amino acids can be classified as $α -, γ -, δ -$ and so on depending upon the relative position of an amino group with respect to a carboxyl group. Which type of amino acids forms polypeptide chain in proteins?

Discussion

9.	Why do non metal are not rusted?
Answer» Why do non metal are not rusted?

Discussion

10.	The coagulation of 100 ml of colloidal solution of gold is completely prevented by addition of 0.25 g of a substance “X” to it before adding 1 ml of 10%NaCl solution. The gold number of “X” us
Answer» The coagulation of 100 ml of colloidal solution of gold is completely prevented by addition of 0.25 g of a substance “X” to it before adding 1 ml of $10 % N a C l$ solution. The gold number of “X” us

Discussion

11.	QUESTION 2.8 An antifreeze solution is prepared from 222.6 g of ethylene glycol (C2H6O2) and 200 g of water. Calculate the molality of the solution. If the density of the solution is 1.072 g m L−1, then what shall be the molarity of the solution?
Answer» QUESTION 2.8 An antifreeze solution is prepared from 222.6 g of ethylene glycol $(C_{2} H_{6} O_{2})$ and 200 g of water. Calculate the molality of the solution. If the density of the solution is $1.072 g m L^{- 1}$ , then what shall be the molarity of the solution?

11.

QUESTION 2.8 An antifreeze solution is prepared from 222.6 g of ethylene glycol (C2H6O2) and 200 g of water. Calculate the molality of the solution. If the density of the solution is 1.072 g m L−1, then what shall be the molarity of the solution?

Answer»

QUESTION 2.8

An antifreeze solution is prepared from 222.6 g of ethylene glycol $(C_{2} H_{6} O_{2})$ and 200 g of water. Calculate the molality of the solution. If the density of the solution is $1.072 g m L^{- 1}$ , then what shall be the molarity of the solution?

Discussion

12.	An alkene ‘A’ on ozonolysis gives a mixture of ethanal and pentan-3-one. Write structure and IUPAC name of ‘A’
Answer» An alkene ‘A’ on ozonolysis gives a mixture of ethanal and pentan-3-one. Write structure and IUPAC name of ‘A’

Discussion

13.	In the following reaction sequence in aqueous solution, the species X, Y and Z, respectively, are S2O2−3Ag+−−→XclearsolutionAg+−−→Ywhiteprecipitatewith time−−−−−→Zblackprecipitate
Answer» In the following reaction sequence in aqueous solution, the species X, Y and Z, respectively, are $S_{2} O_{3}^{2 -} A g^{+} - - \to X clear solution A g^{+} - - \to Y white precipitate with time - ---- \to Z black precipitate$

Discussion

14.	Write the structures of the monomers used for getting the following polymers: (a) Teflon (b) Melamine - formaldehyde polymer (c) Neoprene
Answer» Write the structures of the monomers used for getting the following polymers: (a) Teflon (b) Melamine - formaldehyde polymer (c) Neoprene

Discussion

15.	What is the state of hybridisation of carbon in (a) CO2−3 (b) diamond (c) graphite?
Answer» What is the state of hybridisation of carbon in (a) $C O_{3}^{2 -}$ (b) diamond (c) graphite?

Discussion

16.	The correct order of reactivity towards nucleophilic substitution reaction of the given compound is:
Answer» The correct order of reactivity towards nucleophilic substitution reaction of the given compound is:

Discussion

17.	What is the value of 200 lb in kilograms?
Answer» What is the value of 200 lb in kilograms?

Discussion

18.	Carbon is known to form long chains of carbon atoms. This property is known as?
Answer» Carbon is known to form long chains of carbon atoms. This property is known as?

Discussion

19.	Question 25 On the basis of information given below mark the correct option. Information On adding acetone to methanol some of the hydrogen bonds between methanol molecules break. (a) At specific composition methanol-acetone mixture will form minimum boiling azeotrope and will show positive deviation from Raoult's law (b) At specific composition methanol-acetone mixture will form maximum boiling azeotrope and will show positive deviation from Raoult's law (c) At specific composition methanol-acetone mixture will form minimum boiling azeotrope and will show negative deviation from Raoult's law (d) At specific composition methanol-acetone mixture will form maximum boiling azeotrope and will show negative deviation from Raoult's law
Answer» Question 25 On the basis of information given below mark the correct option. Information On adding acetone to methanol some of the hydrogen bonds between methanol molecules break. (a) At specific composition methanol-acetone mixture will form minimum boiling azeotrope and will show positive deviation from Raoult's law (b) At specific composition methanol-acetone mixture will form maximum boiling azeotrope and will show positive deviation from Raoult's law (c) At specific composition methanol-acetone mixture will form minimum boiling azeotrope and will show negative deviation from Raoult's law (d) At specific composition methanol-acetone mixture will form maximum boiling azeotrope and will show negative deviation from Raoult's law

Discussion

20.	Which of the following has highest octane no.
Answer» Which of the following has highest octane no.

Discussion

21.	In the following sequence of reactions, identify the compounds (A), (B), (C) and (D): Na2CO3SO2−−→(A)Na2CO3−−−−−→(B)S→(C)AgNO3−−−−→(D)
Answer» In the following sequence of reactions, identify the compounds (A), (B), (C) and (D): $N a_{2} C O_{3} S O_{2} - - \to (A) N a_{2} C O_{3} - ---- \to (B) S \to (C) A g N O_{3} - --- \to (D)$

Discussion

22.	A liquid with varying density is contained in a rectangular container of height 10 cm. The density of the liquid at depth h cm below the free surface is given by ρ=ρ0(1+h) , where ρ0=0.8gm cm−3. Its average density is 8k10gm cm−3 . The value of ′k′ is
Answer» A liquid with varying density is contained in a rectangular container of height $10$ $c m$ . The density of the liquid at depth h $c m$ below the free surface is given by $ρ = ρ_{0} (1 + h)$ , where $ρ_{0} = 0.8 g m c m^{- 3}$ . Its average density is $\frac{8 k}{10} g m c m^{- 3}$ . The value of $^{'} k^{'}$ is

Discussion

23.	The energy of an electron in the ground state of a H-atom is −2.15×10−18 J. The Ionisation energy of the atomic hydrogen in terms of 105J mol−1 is:
Answer» The energy of an electron in the ground state of a $H$ -atom is $- 2.15 \times 10^{- 18} J$ . The Ionisation energy of the atomic hydrogen in terms of $10^{5} J m o l^{- 1}$ is:

Discussion

24.	Can we boil at zero degrees?
Answer» Can we boil at zero degrees?

Discussion

25.	Which is the most stable allotropic form of phosphrous?
Answer» Which is the most stable allotropic form of phosphrous?

Discussion

26.	Match column I with column II: Column - IColumn - IIi. Cr(OH)3+H2O2 in basic mediump. CO+H2ii. Acidic KMnO4+H2O2q. NH3iii. Ca3N2+H2Or. Water-gasiv. Red-hot coke + steam (at 1273 K, Ni catalyst)s. Yellow solutiont. Ca(OH)2u. Solution decolourised
Answer» Match column I with column II: $\begin{matrix} Column - I & Column - II i. C r (O H)_{3} + H_{2} O_{2} in basic medium & p. C O + H_{2} ii. Acidic K M n O_{4} + H_{2} O_{2} & q. N H_{3} iii. C a_{3} N_{2} + H_{2} O & r. Water-gas iv. Red-hot coke + steam (at 1273 K, Ni catalyst) & s. Yellow solution t. C a (O H)_{2} u. Solution decolourised \end{matrix}$

Discussion

27.	Which of the following oxides will dissolve in H2SO4 ?
Answer» Which of the following oxides will dissolve in $H_{2} S O_{4}$ ?

Discussion

28.	Write the mechanism of the following reaction. nBuBr+KCNEiOH−H2O−−−−−−−→nBuCN Write the resonating structures of KCN. Due to the presence of polar solvent, find the possiblity, which product will be formed preferentially ?
Answer» Write the mechanism of the following reaction. $n B u B r + K C N E i O H - H_{2} O - ------ \to n B u C N$ Write the resonating structures of KCN. Due to the presence of polar solvent, find the possiblity, which product will be formed preferentially ?

28.

Write the mechanism of the following reaction. nBuBr+KCNEiOH−H2O−−−−−−−→nBuCN Write the resonating structures of KCN. Due to the presence of polar solvent, find the possiblity, which product will be formed preferentially ?

Answer»

Write the mechanism of the following reaction.

$n B u B r + K C N E i O H - H_{2} O - ------ \to n B u C N$

Write the resonating structures of KCN.

Due to the presence of polar solvent, find the possiblity, which product will be formed preferentially ?

Discussion

29.	Find the number of electrons present in a pure sample of MgSO4.7H2O containing 5.5 moles of oxygen atoms? (Take Avogadro's number (NA)=6×1023)
Answer» Find the number of electrons present in a pure sample of $M g S O_{4} .7 H_{2} O$ containing 5.5 moles of oxygen atoms? (Take Avogadro's number $(N_{A}) = 6 \times 10^{23}$ )

Discussion

30.	Determine the heat of the following reaction: FeO(s)+Fe2O3(s)→Fe3O4(s) Given informations: 2Fe(s)+O2(g)→2FeO(s); ΔH∘=−544 kJ4Fe(s)+3O2(g)→2Fe2O3(s); ΔH∘=−1648.4 kJFe3O4(s)→3Fe(s)+2O2(g);ΔH∘=+1118.4 kJ
Answer» Determine the heat of the following reaction: $F e O (s) + F e_{2} O_{3} (s) \to F e_{3} O_{4} (s)$ Given informations: $2 F e (s) + O_{2} (g) \to 2 F e O (s); Δ H^{\circ} = - 544 k J 4 F e (s) + 3 O_{2} (g) \to 2 F e_{2} O_{3} (s); Δ H^{\circ} = - 1648.4 k J F e_{3} O_{4} (s) \to 3 F e (s) + 2 O_{2} (g); Δ H^{\circ} = + 1118.4 k J$

Discussion

31.	Find the valency of carbonate in CaCO3.
Answer» Find the valency of carbonate in $C a C O_{3}$ .

Discussion

32.	In which of the following equations. H2O2 acts as a reducing agent in the acidic medium?
Answer» In which of the following equations. $H_{2} O_{2}$ acts as a reducing agent in the acidic medium?

Discussion

33.	Bond dissociation enthalpies of H2(g) and N2(g) are 436.0 kJmol−1 and 941.3 kJmol−1 respectively. Enthalpy of formation of NH3(g) is −46.0 kJmol−1. What is the enthalpy of atomization ofNH3.
Answer» Bond dissociation enthalpies of $H_{2} (g) a n d N_{2} (g)$ are $436.0 k J m o l^{- 1}$ and $941.3 k J m o l^{- 1}$ respectively. Enthalpy of formation of $N H_{3}$ (g) is $- 46.0 k J m o l^{- 1}$ . What is the enthalpy of atomization of $N H_{3}$ .

Discussion

34.	Q. Will fluorine form hydrohalic acids ?
Answer» Q. Will fluorine form hydrohalic acids ?

Discussion

35.	(a) For the reaction 2AgCI(s)+H2(g)(1atm)⟶2Ag(s)+2H+(0.1M)+2CI−(0.1M), ΔG∘ = - 43600 J at 25∘C. Calculate the e.m.f. of the cell [log 10−n=−n] (b) Define fuel cell and write its two advantages.
Answer» (a) For the reaction $2 A g C I (s) + H_{2} (g) (1 a t m) ⟶ 2 A g (s) + 2 H^{+} (0.1 M) + 2 C I^{-} (0.1 M),$ $Δ G^{\circ}$ = - 43600 J at $25^{\circ} C .$ Calculate the e.m.f. of the cell $[l o g 10^{- n} = - n]$ (b) Define fuel cell and write its two advantages.

Discussion

36.	If water be used to construct a barometer, what would be the height of water column at standard atmospheric pressure (76 cm of mercury)?
Answer» If water be used to construct a barometer, what would be the height of water column at standard atmospheric pressure (76 cm of mercury)?

Discussion

37.	The molecular velocities of two gases at the same temperature are u1 and u2 and their molecular masses are m1 and m2 respectively which of the following expressions are correct?
Answer» The molecular velocities of two gases at the same temperature are $u_{1}$ and $u_{2}$ and their molecular masses are $m_{1}$ and $m_{2}$ respectively which of the following expressions are correct?

Discussion

38.	In the case of alkali metal halides, the covalent character decreases in the order:
Answer» In the case of alkali metal halides, the covalent character decreases in the order:

Discussion

39.	Atomic number of Ag is 47. In the same group, the atomic number of elements placed above and below Ag in the long form of periodic table will be x and y respectively. Give the value of x+y12.
Answer» Atomic number of $A g$ is $47$ . In the same group, the atomic number of elements placed above and below $A g$ in the long form of periodic table will be $x$ and $y$ respectively. Give the value of $\frac{x + y}{12}$ .

Discussion

40.	The correct order of basic strength among the following is :
Answer» The correct order of basic strength among the following is :

Discussion

41.	Light of wavelength 2000 ∘A is incident on the cathode of a photocell. The current in the photocell is reduced to zero by stopping potential of 2 V. Find the threshold wavelength of the material of the cathode. Given:Planck's constamt (h)=6.63×10−34 J s, c=3×108 m s−1, e=1.6×10−19 C
Answer» Light of wavelength $2000 \circ A$ is incident on the cathode of a photocell. The current in the photocell is reduced to zero by stopping potential of $2 V$ . Find the threshold wavelength of the material of the cathode. $Given : Planck's constamt (h) = 6.63 \times 10^{- 34} {J s}, c = 3 \times 10^{8} {m s}^{- 1}, e = 1.6 \times 10^{- 19} C$

Discussion

42.	A body of mass M at rest explodes into three pieces, two of which of mass M/4 each are thrown off in perpendicular directions with velocities of 3m/s and 4m/s respectively . Find the velocity of third piece.
Answer» A body of mass M at rest explodes into three pieces, two of which of mass M/4 each are thrown off in perpendicular directions with velocities of 3m/s and 4m/s respectively . Find the velocity of third piece.

Discussion

43.	A rod of lemgle2m and 0.5kg is fixed at one end and allowed to hang vertically from a rigid support. Find the work done in raising the other end of rod until it makes an angle 60° with the verticaverticaO:-)
Answer» A rod of lemgle2m and 0.5kg is fixed at one end and allowed to hang vertically from a rigid support. Find the work done in raising the other end of rod until it makes an angle 60° with the verticaverticaO:-)

Discussion

44.	Explain the preparation of sodium fusion extract
Answer» Explain the preparation of sodium fusion extract

Discussion

45.	Which among the following has the largest atomic radii?
Answer» Which among the following has the largest atomic radii?

Discussion

46.	Sulphur reacts with chlorine in 1:2 ratio and forms (X). (X) on hydrolysis gives a sulphur compound (Y). What is the hybridisation of the central atom in the anion of (Y)?
Answer» Sulphur reacts with chlorine in $1 : 2$ ratio and forms (X). (X) on hydrolysis gives a sulphur compound (Y). What is the hybridisation of the central atom in the anion of (Y)?

Discussion

47.	What is mass defect?
Answer» What is mass defect?

Discussion

48.	A solution has 1:4mole ratio of pentane to hexane. The vapour pressures of pure hydrocarbons at 20°C are 440Hg for pentane and 120 mm Hg for hexane. The mole fraction of pentane in vapour phase would be
Answer» A solution has 1:4mole ratio of pentane to hexane. The vapour pressures of pure hydrocarbons at 20°C are 440Hg for pentane and 120 mm Hg for hexane. The mole fraction of pentane in vapour phase would be

Discussion

49.	A solution of (+) -2-chloro-2-phenyl ethane in toluene racemises slowly in the presence of small sbcl5, due to formation of
Answer» A solution of (+) -2-chloro-2-phenyl ethane in toluene racemises slowly in the presence of small $s b c l_{5}$ , due to formation of

Discussion

50.	Difference between molarity and molality
Answer» Difference between molarity and molality

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If a carbon compound with 4 carbons in a chain and the 2nd carbon has a doubly bonded oxygen attached to it, what is it called?

Ziegler - Natta catalyst is used in the preparation of

Ethyl alcohol is obtained when ethyl chloride is boiled with

Glauber’s salt is

If the solution boils at a temperature T1 and the solvent at a temperature T2 the elevation of boiling point is given by

In a redox reaction, oxidation number of an oxidant:

What is the hybridization of sulphur in its crown ring structure?

Amino acids can be classified as α−,γ−,δ− and so on depending upon the relative position of an amino group with respect to a carboxyl group. Which type of amino acids forms polypeptide chain in proteins?

Why do non metal are not rusted?

The coagulation of 100 ml of colloidal solution of gold is completely prevented by addition of 0.25 g of a substance “X” to it before adding 1 ml of 10%NaCl solution. The gold number of “X” us

QUESTION 2.8 An antifreeze solution is prepared from 222.6 g of ethylene glycol (C2H6O2) and 200 g of water. Calculate the molality of the solution. If the density of the solution is 1.072 g m L−1, then what shall be the molarity of the solution?

An alkene ‘A’ on ozonolysis gives a mixture of ethanal and pentan-3-one. Write structure and IUPAC name of ‘A’

In the following reaction sequence in aqueous solution, the species X, Y and Z, respectively, are S2O2−3Ag+−−→XclearsolutionAg+−−→Ywhiteprecipitatewith time−−−−−→Zblackprecipitate

Write the structures of the monomers used for getting the following polymers: (a) Teflon (b) Melamine - formaldehyde polymer (c) Neoprene

What is the state of hybridisation of carbon in (a) CO2−3 (b) diamond (c) graphite?

The correct order of reactivity towards nucleophilic substitution reaction of the given compound is:

What is the value of 200 lb in kilograms?

Carbon is known to form long chains of carbon atoms. This property is known as?

Which of the following has highest octane no.

In the following sequence of reactions, identify the compounds (A), (B), (C) and (D): Na2CO3SO2−−→(A)Na2CO3−−−−−→(B)S→(C)AgNO3−−−−→(D)

A liquid with varying density is contained in a rectangular container of height 10 cm. The density of the liquid at depth h cm below the free surface is given by ρ=ρ0(1+h) , where ρ0=0.8gm cm−3. Its average density is 8k10gm cm−3 . The value of ′k′ is

The energy of an electron in the ground state of a H-atom is −2.15×10−18 J. The Ionisation energy of the atomic hydrogen in terms of 105J mol−1 is:

Can we boil at zero degrees?

Which is the most stable allotropic form of phosphrous?

Match column I with column II: Column - IColumn - IIi. Cr(OH)3+H2O2 in basic mediump. CO+H2ii. Acidic KMnO4+H2O2q. NH3iii. Ca3N2+H2Or. Water-gasiv. Red-hot coke + steam (at 1273 K, Ni catalyst)s. Yellow solutiont. Ca(OH)2u. Solution decolourised

Which of the following oxides will dissolve in H2SO4 ?

Write the mechanism of the following reaction. nBuBr+KCNEiOH−H2O−−−−−−−→nBuCN Write the resonating structures of KCN. Due to the presence of polar solvent, find the possiblity, which product will be formed preferentially ?

Find the number of electrons present in a pure sample of MgSO4.7H2O containing 5.5 moles of oxygen atoms? (Take Avogadro's number (NA)=6×1023)

Determine the heat of the following reaction: FeO(s)+Fe2O3(s)→Fe3O4(s) Given informations: 2Fe(s)+O2(g)→2FeO(s); ΔH∘=−544 kJ4Fe(s)+3O2(g)→2Fe2O3(s); ΔH∘=−1648.4 kJFe3O4(s)→3Fe(s)+2O2(g);ΔH∘=+1118.4 kJ

Find the valency of carbonate in CaCO3.

In which of the following equations. H2O2 acts as a reducing agent in the acidic medium?

Bond dissociation enthalpies of H2(g) and N2(g) are 436.0 kJmol−1 and 941.3 kJmol−1 respectively. Enthalpy of formation of NH3(g) is −46.0 kJmol−1. What is the enthalpy of atomization ofNH3.

Q. Will fluorine form hydrohalic acids ?

(a) For the reaction 2AgCI(s)+H2(g)(1atm)⟶2Ag(s)+2H+(0.1M)+2CI−(0.1M), ΔG∘ = - 43600 J at 25∘C. Calculate the e.m.f. of the cell [log 10−n=−n] (b) Define fuel cell and write its two advantages.

If water be used to construct a barometer, what would be the height of water column at standard atmospheric pressure (76 cm of mercury)?

The molecular velocities of two gases at the same temperature are u1 and u2 and their molecular masses are m1 and m2 respectively which of the following expressions are correct?

In the case of alkali metal halides, the covalent character decreases in the order:

Atomic number of Ag is 47. In the same group, the atomic number of elements placed above and below Ag in the long form of periodic table will be x and y respectively. Give the value of x+y12.

The correct order of basic strength among the following is :

Light of wavelength 2000 ∘A is incident on the cathode of a photocell. The current in the photocell is reduced to zero by stopping potential of 2 V. Find the threshold wavelength of the material of the cathode. Given:Planck's constamt (h)=6.63×10−34 J s, c=3×108 m s−1, e=1.6×10−19 C

A body of mass M at rest explodes into three pieces, two of which of mass M/4 each are thrown off in perpendicular directions with velocities of 3m/s and 4m/s respectively . Find the velocity of third piece.

A rod of lemgle2m and 0.5kg is fixed at one end and allowed to hang vertically from a rigid support. Find the work done in raising the other end of rod until it makes an angle 60° with the verticaverticaO:-)

Explain the preparation of sodium fusion extract

Which among the following has the largest atomic radii?

Sulphur reacts with chlorine in 1:2 ratio and forms (X). (X) on hydrolysis gives a sulphur compound (Y). What is the hybridisation of the central atom in the anion of (Y)?

What is mass defect?

A solution has 1:4mole ratio of pentane to hexane. The vapour pressures of pure hydrocarbons at 20°C are 440Hg for pentane and 120 mm Hg for hexane. The mole fraction of pentane in vapour phase would be

A solution of (+) -2-chloro-2-phenyl ethane in toluene racemises slowly in the presence of small sbcl5, due to formation of

Difference between molarity and molality