46295 + Interview Questions in Chemistry

1.	how to find the bond angles for H-N-H in NH3 and H-O-H in H2O?how to find the hybridisation for silicon carbide andthe hybridisation for N3?
Answer» how to find the bond angles for H-N-H in NH3 and H-O-H in H2O?how to find the hybridisation for silicon carbide andthe hybridisation for N3?

Discussion

2.	CH3−CH2−O\|\|C−OHPCl3−−−→ NH3−−−→Δ OBr⊖−−−→ The product is :
Answer» $C H_{3} - C H_{2} - O \| \| C - O H P C l_{3} - -- \to N H_{3} - -- \to Δ O B r^{⊖} - -- \to$ The product is :

Discussion

3.	5.Total vapour pressure of mixture of 1 mole of volatile component A (P^° A=100 mm Hg) and3 mole of volatile component B (P^° B=80 mm Hg) is 90 mm Hg. For such case: (1) there is positive deviation from Raoult's law (2) boiling point has been lowered (3) force of attraction between A and B is smaller than between A and A or between B and B (4) all the above statements are correct
Answer» 5.Total vapour pressure of mixture of 1 mole of volatile component A (P^° A=100 mm Hg) and3 mole of volatile component B (P^° B=80 mm Hg) is 90 mm Hg. For such case: (1) there is positive deviation from Raoult's law (2) boiling point has been lowered (3) force of attraction between A and B is smaller than between A and A or between B and B (4) all the above statements are correct

Discussion

4.	The following equilibrium constants are given N2+3H2⇌2NH3; K1 N2+O2⇌2NO; K2 H2+12O2⟶H2O; K3 The equilibrium constant for the oxidation of NH3 by oxygen to give NO is:
Answer» The following equilibrium constants are given $N_{2} + 3 H_{2} ⇌ 2 N H_{3}; K_{1}$ $N_{2} + O_{2} ⇌ 2 N O; K_{2}$ $H_{2} + \frac{1}{2} O_{2} ⟶ H_{2} O; K_{3}$ The equilibrium constant for the oxidation of $N H_{3}$ by oxygen to give $N O$ is:

4.

The following equilibrium constants are given N2+3H2⇌2NH3; K1 N2+O2⇌2NO; K2 H2+12O2⟶H2O; K3 The equilibrium constant for the oxidation of NH3 by oxygen to give NO is:

Answer»

The following equilibrium constants are given

$N_{2} + 3 H_{2} ⇌ 2 N H_{3}; K_{1}$

$N_{2} + O_{2} ⇌ 2 N O; K_{2}$

$H_{2} + \frac{1}{2} O_{2} ⟶ H_{2} O; K_{3}$

The equilibrium constant for the oxidation of $N H_{3}$ by oxygen to give $N O$ is:

Discussion

5.	When NaNO2 is oxidised by K2Cr2O7, the important products formed are
Answer» When $N a N O_{2}$ is oxidised by $K_{2} C r_{2} O_{7}$ , the important products formed are

Discussion

6.	Calculate the mole fraction of toluene in the vapour pressure which in equilibrium with the solution of benzene and toluene having a mole fraction of toluene 0.5 the vapour pressure of pure benzene is 119 and that of toluene is 37 tour at the same temperature
Answer» Calculate the mole fraction of toluene in the vapour pressure which in equilibrium with the solution of benzene and toluene having a mole fraction of toluene 0.5 the vapour pressure of pure benzene is 119 and that of toluene is 37 tour at the same temperature

Discussion

7.	Which of the following is the strongest Lewis acid
Answer» Which of the following is the strongest Lewis acid

Discussion

8.	Find the minimum velocity of a pojectile for { which it passes through any general point (a,b) .
Answer» Find the minimum velocity of a pojectile for { which it passes through any general point (a,b) .

Discussion

9.	Identifythe functional groups in the following compounds(a) (b) (c)
Answer» Identify the functional groups in the following compounds (a) (b) (c)

9.

Identifythe functional groups in the following compounds(a) (b) (c)

Answer»

Identify
the functional groups in the following compounds

(a)

(b)

(c)

Discussion

10.	What is fixed vector?
Answer» What is fixed vector?

Discussion

11.	What is the relation between △ H and △ E for the combustion of sucrose at 25^0C :
Answer» What is the relation between △ H and △ E for the combustion of sucrose at 25^0C :

Discussion

12.	What are animal tissues and what are its types
Answer» What are animal tissues and what are its types

Discussion

13.	100.Nitration of chlorobenzene gives ortho nitro chloro benzene and para nitro chloro benzene . Why ? Explain With MECHANISM of this reaction
Answer» 100.Nitration of chlorobenzene gives ortho nitro chloro benzene and para nitro chloro benzene . Why ? Explain With MECHANISM of this reaction

Discussion

14.	What is the mechanism of the reaction between chloral and phenyl chloride to form DDT? Which type of mechanism is it?
Answer» What is the mechanism of the reaction between chloral and phenyl chloride to form DDT? Which type of mechanism is it?

Discussion

15.	6. The correct order of reactivity towards Sn1 Mechanism (a) 1>2>4>3 (b)3>4>2>1 (c)4>2>1>3 (d)2>4>3>1
Answer» 6. The correct order of reactivity towards Sn1 Mechanism (a) 1>2>4>3 (b)3>4>2>1 (c)4>2>1>3 (d)2>4>3>1

Discussion

16.	Explain the principle of microwave oven? Is cooking in microwaves good for health? Give a clear description of both.
Answer» Explain the principle of microwave oven? Is cooking in microwaves good for health? Give a clear description of both.

Discussion

17.	Hydrogenation of benzoyl chloride in the presence of Pd and BaSO4 gives
Answer» Hydrogenation of benzoyl chloride in the presence of Pd and $B a S O_{4}$ gives

Discussion

18.	The weakest inter-particle forces are present in:
Answer» The weakest inter-particle forces are present in:

Discussion

19.	Which of the following figure represent the tetrahedral void? (note: red spheres are places over the layer of black spheres)
Answer» Which of the following figure represent the tetrahedral void? (note: red spheres are places over the layer of black spheres)

Discussion

20.	Reactionbetween N2and O2takes place as follows:Ifa mixture of 0.482 mol of N2and 0.933 mol of O2is placed in a 10 L reaction vessel and allowed to form N2Oat a temperature for which Kc= 2.0 × 10–37,determine the composition of equilibrium mixture.
Answer» Reaction between N₂ and O₂ takes place as follows: If a mixture of 0.482 mol of N₂ and 0.933 mol of O₂ is placed in a 10 L reaction vessel and allowed to form N₂O at a temperature for which K_c = 2.0 × 10^–37, determine the composition of equilibrium mixture.

20.

Reactionbetween N2and O2takes place as follows:Ifa mixture of 0.482 mol of N2and 0.933 mol of O2is placed in a 10 L reaction vessel and allowed to form N2Oat a temperature for which Kc= 2.0 × 10–37,determine the composition of equilibrium mixture.

Answer»

Reaction
between N₂
and O₂
takes place as follows:

If
a mixture of 0.482 mol of N₂
and 0.933 mol of O₂
is placed in a 10 L reaction vessel and allowed to form N₂O
at a temperature for which K_c
= 2.0 × 10^–37,
determine the composition of equilibrium mixture.

Discussion

21.	Why is the benzene ring represented with a circle in the between instead of showing the double bonds? I searched the answer in the net but could not get an understable answer. So can I get an answer with a proper explanation?
Answer» Why is the benzene ring represented with a circle in the between instead of showing the double bonds? I searched the answer in the net but could not get an understable answer. So can I get an answer with a proper explanation?

Discussion

22.	Not considering the electronic spin, the degeneracy of the second excited state (n = 3) of H atom is 9, while the degeneracy of the second excited state of H− is
Answer» Not considering the electronic spin, the degeneracy of the second excited state (n = 3) of $H$ atom is 9, while the degeneracy of the second excited state of $H^{-}$ is

Discussion

23.	2. How to find the oxidation number in the reaction 2Cu2O(s)+Cu2S(s) 6Cu(s) + SO2.
Answer» 2. How to find the oxidation number in the reaction 2Cu2O(s)+Cu2S(s) 6Cu(s) + SO2.

Discussion

24.	Which of the following can undergo addition reactions?
Answer» Which of the following can undergo addition reactions?

Discussion

25.	Identify R configuration:
Answer» Identify R configuration:

Discussion

26.	What volume of 0.1 M HCOONa solution should be added to 50 mL of 0.05 M formic acid to produce a buffer solution of pH=4.0, pKa of formic acid =3.7 ?
Answer» What volume of $0.1 M H C O O N a$ solution should be added to $50 mL$ of $0.05 M$ formic acid to produce a buffer solution of $p H = 4.0$ , $p K_{a}$ of formic acid $= 3.7$ ?

Discussion

27.	For the reaction, FeS2+KMnO4+H+→Fe3++H2SO4+Mn2++H2O. If the molar mass of FeS2 is M, then equivalent mass of FeS2 would be equal to:
Answer» For the reaction, $F e S_{2} + K M n O_{4} + H^{+} \to F e^{3 +} + H_{2} S O_{4} + M n^{2 +} + H_{2} O$ . If the molar mass of $F e S_{2}$ is M, then equivalent mass of $F e S_{2}$ would be equal to:

Discussion

28.	In context with beryllium, which one of the following statements is incorrect?
Answer» In context with beryllium, which one of the following statements is incorrect?

Discussion

29.	At 1000C the vapour pressure of a solution of 6.5 g of a solute in 100 g water is 732 mm. If Kb=0.52, the boiling point of this solution will be:
Answer» At $100^{0} C$ the vapour pressure of a solution of $6.5 g$ of a solute in $100 g$ water is $732 mm$ . If $K_{b} = 0.52$ , the boiling point of this solution will be:

Discussion

30.	Why is 1. Cotton is preferred while cooking 2. Plastic vessels should not be used in microwave defrosting. 3. Banners are made of flex material. 4. Handles and bristles of a toothbrush aren't the same. 5. Synthetic Fabric soak less water than natural fabrics do.
Answer» Why is 1. Cotton is preferred while cooking 2. Plastic vessels should not be used in microwave defrosting. 3. Banners are made of flex material. 4. Handles and bristles of a toothbrush aren't the same. 5. Synthetic Fabric soak less water than natural fabrics do.

Discussion

31.	The chloro compound which is used as a fire extinguisher is
Answer» The chloro compound which is used as a fire extinguisher is

Discussion

32.	A faulty celsius thermometre has its fixed points marked at 5^° C and 95^° C. What is the actual temperature of a liquid if its thermometre reads it 59^° C?
Answer» A faulty celsius thermometre has its fixed points marked at 5^° C and 95^° C. What is the actual temperature of a liquid if its thermometre reads it 59^° C?

Discussion

33.	2A(g)+3B(g)+C(g)→D(g)+E(g)The order of the given reaction is 72 and the experimental rate law of the given reaction is K[A]2[B]x[C]1. Find the value of 'x'.
Answer» $2 A (g) + 3 B (g) + C (g) \to D (g) + E (g)$ The order of the given reaction is $\frac{7}{2}$ and the experimental rate law of the given reaction is $K [A]^{2} [B]^{x} [C]^{1}$ . Find the value of 'x'.

Discussion

34.	In the chromyl chloride test, the reagent used is
Answer» In the chromyl chloride test, the reagent used is

Discussion

35.	Is "mono , di , tri " or "bis , tris " considered IUPAC naming for coordination compounds , and can 2 vowels come together ( like "tetraaqua" ) ?
Answer» Is "mono , di , tri " or "bis , tris " considered IUPAC naming for coordination compounds , and can 2 vowels come together ( like "tetraaqua" ) ?

Discussion

36.	What is the momentum?
Answer» What is the momentum?

Discussion

37.	17. How to calculate oxidizing state ?
Answer» 17. How to calculate oxidizing state ?

Discussion

38.	2.If n(U)=40,n(AUB')=12,n(A-B)=10 and n(B-A)=14,what is n(A)
Answer» 2.If n(U)=40,n(AUB')=12,n(A-B)=10 and n(B-A)=14,what is n(A)

Discussion

39.	Which one is most reactive towards nucleophilic addition reaction?
Answer» Which one is most reactive towards nucleophilic addition reaction?

Discussion

40.	59 why boilling pint of aldehyde is lower than alcohol?(hydrogen bond is present in both CHO AND OH)right?Then why there is a difference in boiling point?
Answer» 59 why boilling pint of aldehyde is lower than alcohol?(hydrogen bond is present in both CHO AND OH)right?Then why there is a difference in boiling point?

Discussion

41.	How to draw electrone dot structure of Any compound
Answer» How to draw electrone dot structure of Any compound

Discussion

42.	Two closed bulbs of equal volume (V) containing an ideal gas initially at pressure pi and temperatureT1 are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to T2 .The final pressurepf is:
Answer» Two closed bulbs of equal volume (V) containing an ideal gas initially at pressure $p_{i}$ and temperature $T_{1}$ are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to $T_{2}$ .The final pressure $p_{f}$ is:

42.

Two closed bulbs of equal volume (V) containing an ideal gas initially at pressure pi and temperatureT1 are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to T2 .The final pressurepf is:

Answer»

Two closed bulbs of equal volume (V) containing an ideal gas initially at pressure $p_{i}$ and temperature $T_{1}$ are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to $T_{2}$ .The final pressure $p_{f}$ is:

Discussion

43.	NH3(g) reacts with CuO(s) according to the following reaction:3CuO(s)+2NH3(g)→3Cu(s)+N2(g)+3H2O(l)Standard enthalpies of formation of NH3(g), CuO(s) and H2O(l) are −46 kJ mol−1, −155 kJ mol−1, and −285 kJ mol−1 respectively. The magnitude of heat liberated (in kJ) when 2.72 g of NH3(g) is reacted completely with CuO(s) according to the reaction given above when all the reactants and products are in their standard state is:
Answer» $N H_{3} (g)$ reacts with $C u O (s)$ according to the following reaction: $3 C u O (s) + 2 N H_{3} (g) \to 3 C u (s) + N_{2} (g) + 3 H_{2} O (l)$ Standard enthalpies of formation of $N H_{3} (g), C u O (s)$ and $H_{2} O (l)$ are $- 46 {kJ mol}^{- 1}, - 155 {kJ mol}^{- 1}, and - 285 {kJ mol}^{- 1}$ respectively. The magnitude of heat liberated (in $kJ$ ) when $2.72 g$ of $N H_{3} (g)$ is reacted completely with $C u O (s)$ according to the reaction given above when all the reactants and products are in their standard state is:

Discussion

44.	the solubility product of a sparingly soluble salt AX2 is 3.2*10^-11 its solubility
Answer» the solubility product of a sparingly soluble salt AX2 is 3.2*10^-11 its solubility

Discussion

45.	On hydrolysis with dil H2SO4, starch and cellulose give 'X' and 'Y'. Then 'X' and 'Y' are a pair of
Answer» On hydrolysis with dil H₂SO₄, starch and cellulose give 'X' and 'Y'. Then 'X' and 'Y' are a pair of

Discussion

46.	Work done on the gas, W, in an irreversible expansion is given by W=−Pext×dV, where Pext is the external pressure and dV is the change in volume of the gas (i.e., Vfinal−Vinitial). What is the value of work done on 1 mole of an ideal gas when it expands into vaccum?
Answer» Work done on the gas, W, in an irreversible expansion is given by $W = - P_{e x t} \times d V$ , where $P_{e x t}$ is the external pressure and dV is the change in volume of the gas (i.e., $V_{f i n a l} - V_{i n i t i a l}$ ). What is the value of work done on 1 mole of an ideal gas when it expands into vaccum?

Discussion

47.	If there were 8 periods in the periodic table and each orbital could have a maximum of 5 electrons, then what is the maximum number of elements that would be present in period 8?
Answer» If there were $8$ periods in the periodic table and each orbital could have a maximum of $5$ electrons, then what is the maximum number of elements that would be present in period $8$ ?

Discussion

48.	Which type of packing is shown in the diagram?
Answer» Which type of packing is shown in the diagram?

48.

Which type of packing is shown in the diagram?

Answer»

Which type of packing is shown in the diagram?

Discussion

49.	For tungsten atomic energy level of K L and M are given 69.5keV 11.3 keV and 2.30 keV respectively .for obtaing characteristic K_β and K_α lines for tungsten what sould be the required minimum accelerating potential and λ_{min }? calculate λ_{α }and
Answer» For tungsten atomic energy level of K L and M are given 69.5keV 11.3 keV and 2.30 keV respectively .for obtaing characteristic K_β and K_α lines for tungsten what sould be the required minimum accelerating potential and λ_{min }? calculate λ_{α }and

Discussion

50.	de broglie wavelength of neutrons in thermal equilibrium temperature T is ?
Answer» de broglie wavelength of neutrons in thermal equilibrium temperature T is ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

how to find the bond angles for H-N-H in NH3 and H-O-H in H2O?how to find the hybridisation for silicon carbide andthe hybridisation for N3?

CH3−CH2−O||C−OHPCl3−−−→ NH3−−−→Δ OBr⊖−−−→ The product is :

The following equilibrium constants are given N2+3H2⇌2NH3; K1 N2+O2⇌2NO; K2 H2+12O2⟶H2O; K3 The equilibrium constant for the oxidation of NH3 by oxygen to give NO is:

When NaNO2 is oxidised by K2Cr2O7, the important products formed are

Calculate the mole fraction of toluene in the vapour pressure which in equilibrium with the solution of benzene and toluene having a mole fraction of toluene 0.5 the vapour pressure of pure benzene is 119 and that of toluene is 37 tour at the same temperature

Which of the following is the strongest Lewis acid

Find the minimum velocity of a pojectile for { which it passes through any general point (a,b) .

Identifythe functional groups in the following compounds(a) (b) (c)

What is fixed vector?

What is the relation between △ H and △ E for the combustion of sucrose at 25^0C :

What are animal tissues and what are its types

100.Nitration of chlorobenzene gives ortho nitro chloro benzene and para nitro chloro benzene . Why ? Explain With MECHANISM of this reaction

What is the mechanism of the reaction between chloral and phenyl chloride to form DDT? Which type of mechanism is it?

6. The correct order of reactivity towards Sn1 Mechanism (a) 1>2>4>3 (b)3>4>2>1 (c)4>2>1>3 (d)2>4>3>1

Explain the principle of microwave oven? Is cooking in microwaves good for health? Give a clear description of both.

Hydrogenation of benzoyl chloride in the presence of Pd and BaSO4 gives

The weakest inter-particle forces are present in:

Which of the following figure represent the tetrahedral void? (note: red spheres are places over the layer of black spheres)

Reactionbetween N2and O2takes place as follows:Ifa mixture of 0.482 mol of N2and 0.933 mol of O2is placed in a 10 L reaction vessel and allowed to form N2Oat a temperature for which Kc= 2.0 × 10–37,determine the composition of equilibrium mixture.

Why is the benzene ring represented with a circle in the between instead of showing the double bonds? I searched the answer in the net but could not get an understable answer. So can I get an answer with a proper explanation?

Not considering the electronic spin, the degeneracy of the second excited state (n = 3) of H atom is 9, while the degeneracy of the second excited state of H− is

2. How to find the oxidation number in the reaction 2Cu2O(s)+Cu2S(s) 6Cu(s) + SO2.

Which of the following can undergo addition reactions?

Identify R configuration:

What volume of 0.1 M HCOONa solution should be added to 50 mL of 0.05 M formic acid to produce a buffer solution of pH=4.0, pKa of formic acid =3.7 ?

For the reaction, FeS2+KMnO4+H+→Fe3++H2SO4+Mn2++H2O. If the molar mass of FeS2 is M, then equivalent mass of FeS2 would be equal to:

In context with beryllium, which one of the following statements is incorrect?

At 1000C the vapour pressure of a solution of 6.5 g of a solute in 100 g water is 732 mm. If Kb=0.52, the boiling point of this solution will be:

Why is 1. Cotton is preferred while cooking 2. Plastic vessels should not be used in microwave defrosting. 3. Banners are made of flex material. 4. Handles and bristles of a toothbrush aren't the same. 5. Synthetic Fabric soak less water than natural fabrics do.

The chloro compound which is used as a fire extinguisher is

A faulty celsius thermometre has its fixed points marked at 5^° C and 95^° C. What is the actual temperature of a liquid if its thermometre reads it 59^° C?

2A(g)+3B(g)+C(g)→D(g)+E(g)The order of the given reaction is 72 and the experimental rate law of the given reaction is K[A]2[B]x[C]1. Find the value of 'x'.

In the chromyl chloride test, the reagent used is

Is "mono , di , tri " or "bis , tris " considered IUPAC naming for coordination compounds , and can 2 vowels come together ( like "tetraaqua" ) ?

What is the momentum?

17. How to calculate oxidizing state ?

2.If n(U)=40,n(AUB')=12,n(A-B)=10 and n(B-A)=14,what is n(A)

Which one is most reactive towards nucleophilic addition reaction?

59 why boilling pint of aldehyde is lower than alcohol?(hydrogen bond is present in both CHO AND OH)right?Then why there is a difference in boiling point?

How to draw electrone dot structure of Any compound

Two closed bulbs of equal volume (V) containing an ideal gas initially at pressure pi and temperatureT1 are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to T2 .The final pressurepf is:

the solubility product of a sparingly soluble salt AX2 is 3.2*10^-11 its solubility

On hydrolysis with dil H2SO4, starch and cellulose give 'X' and 'Y'. Then 'X' and 'Y' are a pair of

Work done on the gas, W, in an irreversible expansion is given by W=−Pext×dV, where Pext is the external pressure and dV is the change in volume of the gas (i.e., Vfinal−Vinitial). What is the value of work done on 1 mole of an ideal gas when it expands into vaccum?

If there were 8 periods in the periodic table and each orbital could have a maximum of 5 electrons, then what is the maximum number of elements that would be present in period 8?

Which type of packing is shown in the diagram?

For tungsten atomic energy level of K L and M are given 69.5keV 11.3 keV and 2.30 keV respectively .for obtaing characteristic K_β and K_α lines for tungsten what sould be the required minimum accelerating potential and λ_{min }? calculate λ_{α }and

de broglie wavelength of neutrons in thermal equilibrium temperature T is ?