46295 + Interview Questions in Chemistry

1.	For the water gas reaction, C(s)+H2O(g)⇌CO(g)+H2(g) the standard Gibbs free energy of reaction (at 1000 K) is −8.1 kJ/mol. Calculate its equilibrium constant
Answer» For the water gas reaction, $C (s) + H_{2} O (g) ⇌ C O (g) + H_{2} (g)$ the standard Gibbs free energy of reaction (at $1000 K$ ) is $- 8.1 k J / m o l .$ Calculate its equilibrium constant

Discussion

2.	QUESTION 2.19 A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 k Pa at 298 K. Calculate (i) molar mass of the solute (ii) vapour pressure of water at 298 K.
Answer» QUESTION 2.19 A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 k Pa at 298 K. Calculate (i) molar mass of the solute (ii) vapour pressure of water at 298 K.

2.

QUESTION 2.19 A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 k Pa at 298 K. Calculate (i) molar mass of the solute (ii) vapour pressure of water at 298 K.

Answer»

QUESTION 2.19

A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 k Pa at 298 K. Calculate (i) molar mass of the solute (ii) vapour pressure of water at 298 K.

Discussion

3.	Which compound would give 5-keto-2-methylhexanal upon ozonolysis?
Answer» Which compound would give 5-keto-2-methylhexanal upon ozonolysis?

Discussion

4.	Equal volumes of 1M HCl& 1M H2SO4 are neutralized by 1M NaOH solution and x & y KJ/equivalent of heat are liberated respectively. Which of the following relations is correct?
Answer» Equal volumes of 1M HCl& 1M $H_{2} S O_{4}$ are neutralized by 1M NaOH solution and x & y KJ/equivalent of heat are liberated respectively. Which of the following relations is correct?

Discussion

5.	An analytic balance has uncertainty In measurement equal to ±1 mg. Then report the result in terms of percentage if the weight of a compound is (a) 1 g (b) 10 g (c) 100 g
Answer» An analytic balance has uncertainty In measurement equal to $\pm$ 1 mg. Then report the result in terms of percentage if the weight of a compound is (a) 1 g (b) 10 g (c) 100 g

Discussion

6.	One litre of a mixture of carbon monoxide and carbon dioxide is passed through a tube containing red hot charcoal ,the volume now becomes 1.6 litres. Volumes are measured under similar conditions. Find out the composition of gaseous mixture.
Answer» One litre of a mixture of carbon monoxide and carbon dioxide is passed through a tube containing red hot charcoal ,the volume now becomes 1.6 litres. Volumes are measured under similar conditions. Find out the composition of gaseous mixture.

Discussion

7.	What you mean by packing fraction in 3D?
Answer» What you mean by packing fraction in 3D?

Discussion

8.	A photon of 300 nm is absorbed by a gas, which then re-emits two photons. One re-emitted photon has a wavelength of 400 nm. Calculate the energy of the other photon re-emitted out.
Answer» A photon of 300 nm is absorbed by a gas, which then re-emits two photons. One re-emitted photon has a wavelength of 400 nm. Calculate the energy of the other photon re-emitted out.

Discussion

9.	The heat of atomization of a compound XY3 in gaseous state is E kJ mol−1. What is the bond energy of X−Y bond in kJmol−1 unit?
Answer» The heat of atomization of a compound $X Y_{3}$ in gaseous state is $E k J m o l^{- 1}$ . What is the bond energy of $X - Y$ bond in $k J m o l^{- 1}$ unit?

Discussion

10.	Catalic cycle of enzyme action
Answer» Catalic cycle of enzyme action

Discussion

11.	In which of the following compounds are all the bond lengths equal?
Answer» In which of the following compounds are all the bond lengths equal?

Discussion

12.	What amount of bromine will be required to convert 2 gr of phenol in 2, 4, 6-tribromo phenol?
Answer» What amount of bromine will be required to convert 2 gr of phenol in 2, 4, 6-tribromo phenol?

Discussion

13.	HBr reacts fastest with:
Answer» HBr reacts fastest with:

Discussion

14.	1mole of water has 16 g of oxygen atom i.e. 1 atom of oxygen. Is an atom really that much large to weigh 16 g?
Answer» 1mole of water has 16 g of oxygen atom i.e. 1 atom of oxygen. Is an atom really that much large to weigh 16 g?

Discussion

15.	An organic compound (C3H9N) (A) when treated with nitrous acid, gave an alcohol and N2 gas was evolved. (A) on warming with CHCl3 and caustic potash gave (C), which on reduction gave isopropylmethylamine. Predict the structure of (A).
Answer» An organic compound $(C_{3} H_{9} N)$ (A) when treated with nitrous acid, gave an alcohol and $N_{2}$ gas was evolved. (A) on warming with $C H C l_{3}$ and caustic potash gave (C), which on reduction gave isopropylmethylamine. Predict the structure of (A).

Discussion

16.	17.4% (w/v) K2SO4 solution at 27°C is isotonic with 5.85% (w/v) NaCl solution at 27°C. If NaCl is 100% ionized, what is the % ionization of K2SO4 in aq. solution?
Answer» 17.4% (w/v) K2SO4 solution at 27°C is isotonic with 5.85% (w/v) NaCl solution at 27°C. If NaCl is 100% ionized, what is the % ionization of K2SO4 in aq. solution?

Discussion

17.	The important use of the reaction between potassium cyanide and haloalkane is that...
Answer» The important use of the reaction between potassium cyanide and haloalkane is that...

Discussion

18.	How much electricity is required in coulomb for the oxidation of ? (i) 1 mole of H2O to O2 ? (ii) 1 mole of FeO to Fe2O3 ?
Answer» How much electricity is required in coulomb for the oxidation of ? (i) 1 mole of $H_{2} O t o O_{2}$ ? (ii) 1 mole of $F e O t o F e_{2} O_{3}$ ?

18.

How much electricity is required in coulomb for the oxidation of ? (i) 1 mole of H2O to O2 ? (ii) 1 mole of FeO to Fe2O3 ?

Answer»

How much electricity is required in coulomb for the oxidation of ?

(i) 1 mole of $H_{2} O t o O_{2}$ ?

(ii) 1 mole of $F e O t o F e_{2} O_{3}$ ?

Discussion

19.	Write the expression for the equilibrium constant, KC for each of the following reactions: (i) 2NOCl(g)↔2NO(g)+Cl2(g) (ii) 2Cu(NO3)2(aq)↔2CuO(S)+4NO2(g)+O2(g) (iii) CH3COOC2H5(aq)+H2O(l)↔CH3COOH(aq)+C2H5OH(aq) (iv) Fe3+(aq)+3OH−(aq)↔Fe(OH)3(s) (v) I2(s)+5F2↔2IF5
Answer» Write the expression for the equilibrium constant, $K_{C}$ for each of the following reactions: (i) $2 N O C l (g) \leftrightarrow 2 N O (g) + C l_{2} (g)$ (ii) $2 C u (N O_{3})_{2} (a q) \leftrightarrow 2 C u O (S) + 4 N O_{2} (g) + O_{2} (g)$ (iii) $C H_{3} C O O C_{2} H_{5} (a q) + H_{2} O (l) \leftrightarrow C H_{3} C O O H (a q) + C_{2} H_{5} O H (a q)$ (iv) $F e^{3 +} (a q) + 3 O H^{-} (a q) \leftrightarrow F e (O H)_{3} (s)$ (v) $I_{2} (s) + 5 F_{2} \leftrightarrow 2 I F_{5}$

19.

Write the expression for the equilibrium constant, KC for each of the following reactions: (i) 2NOCl(g)↔2NO(g)+Cl2(g) (ii) 2Cu(NO3)2(aq)↔2CuO(S)+4NO2(g)+O2(g) (iii) CH3COOC2H5(aq)+H2O(l)↔CH3COOH(aq)+C2H5OH(aq) (iv) Fe3+(aq)+3OH−(aq)↔Fe(OH)3(s) (v) I2(s)+5F2↔2IF5

Answer»

Write the expression for the equilibrium constant, $K_{C}$ for each of the following reactions:

(i) $2 N O C l (g) \leftrightarrow 2 N O (g) + C l_{2} (g)$

(ii) $2 C u (N O_{3})_{2} (a q) \leftrightarrow 2 C u O (S) + 4 N O_{2} (g) + O_{2} (g)$

(iii) $C H_{3} C O O C_{2} H_{5} (a q) + H_{2} O (l) \leftrightarrow C H_{3} C O O H (a q) + C_{2} H_{5} O H (a q)$

(iv) $F e^{3 +} (a q) + 3 O H^{-} (a q) \leftrightarrow F e (O H)_{3} (s)$

(v) $I_{2} (s) + 5 F_{2} \leftrightarrow 2 I F_{5}$

Discussion

20.	In the nth orbit, the energy of an electron En=−13.6n2 eV for hydrogen atom. The energy required to take the electron from first orbit to second orbit will be
Answer» In the n^th orbit, the energy of an electron $E_{n} = - \frac{13.6}{n^{2}} e V$ for hydrogen atom. The energy required to take the electron from first orbit to second orbit will be

Discussion

21.	Why is PF3 more acidic among all trihalides? i want correct vaule points from a real chemistry teacher
Answer» Why is PF3 more acidic among all trihalides? i want correct vaule points from a real chemistry teacher

Discussion

22.	A soap bubble, blown by a mechanical pump at the mouth of a tube, increases in volume with time at a constant rate. The graph that correctly depicts the time dependence of pressure inside the bubble is given by
Answer» A soap bubble, blown by a mechanical pump at the mouth of a tube, increases in volume with time at a constant rate. The graph that correctly depicts the time dependence of pressure inside the bubble is given by

Discussion

23.	Describe the structure of the common form of ice.
Answer» Describe the structure of the common form of ice.

Discussion

24.	Which of the following haloalkane will have the highest boiling point?
Answer» Which of the following haloalkane will have the highest boiling point?

Discussion

25.	Which of the following point is not true about interstitial compounds?
Answer» Which of the following point is not true about interstitial compounds?

Discussion

26.	Arrange the following in increasing acidic character Phenol, m - nitrophenol, m - chlorophenol, m - cresol I II III IV
Answer» Arrange the following in increasing acidic character Phenol, m - nitrophenol, m - chlorophenol, m - cresol I II III IV

Discussion

27.	Alumina, on electrolysis in presence of cryolite gives at anode:
Answer» Alumina, on electrolysis in presence of cryolite gives at anode:

Discussion

28.	The most stable conformation of trans-1,4-dimethylcyclohexane is represented as:
Answer» The most stable conformation of trans-1,4-dimethylcyclohexane is represented as:

Discussion

29.	What is the molarity of an NaOH solution if 250 mL contains 1 mg of NaOH?
Answer» What is the molarity of an $N a O H$ solution if 250 mL contains 1 mg of $N a O H$ ?

Discussion

30.	Which of the following is/are resonating structure(s) of phenoxide ion?
Answer» Which of the following is/are resonating structure(s) of phenoxide ion?

Discussion

31.	But-1-yne reacts with cold alkaline KMnO4 to produce
Answer» But-1-yne reacts with cold alkaline $K M n O_{4}$ to produce

Discussion

32.	The density of 3M aqueous solution of sodium thiosulfate is 1.25g/mL. Calculate (1) mole fraction of sodium thiosulfate. (2) molalities of Na+ and S2O3 2- ions.
Answer» The density of 3M aqueous solution of sodium thiosulfate is 1.25g/mL. Calculate (1) mole fraction of sodium thiosulfate. (2) molalities of Na+ and S2O3 2- ions.

Discussion

33.	Magnesium cation has polarising power close to that of
Answer» Magnesium cation has polarising power close to that of

Discussion

34.	Enthalpy of hydrogenation is the enthalpy change when one mole of unsaturated compound is converted to saturated compound. ΔHhydrogenation helps to calculate resonance energy. The standard enthalpy of combustion at 25∘C of hydrogen, cyclohexene and cyclohexane are -300, -3600 and -3770 KJ/mole respectively. Calculate the heat of hydrogenation of cyclohexene.
Answer» Enthalpy of hydrogenation is the enthalpy change when one mole of unsaturated compound is converted to saturated compound. $Δ_{H} h y d r o g e n a t i o n$ helps to calculate resonance energy. The standard enthalpy of combustion at $25^{\circ} C$ of hydrogen, cyclohexene and cyclohexane are -300, -3600 and -3770 KJ/mole respectively. Calculate the heat of hydrogenation of cyclohexene.

34.

Enthalpy of hydrogenation is the enthalpy change when one mole of unsaturated compound is converted to saturated compound. ΔHhydrogenation helps to calculate resonance energy. The standard enthalpy of combustion at 25∘C of hydrogen, cyclohexene and cyclohexane are -300, -3600 and -3770 KJ/mole respectively. Calculate the heat of hydrogenation of cyclohexene.

Answer»

Enthalpy of hydrogenation is the enthalpy change when one mole of unsaturated compound is converted to saturated compound. $Δ_{H} h y d r o g e n a t i o n$ helps to calculate resonance energy.

The standard enthalpy of combustion at $25^{\circ} C$ of hydrogen, cyclohexene and cyclohexane are -300, -3600 and -3770 KJ/mole respectively. Calculate the heat of hydrogenation of cyclohexene.

Discussion

35.	Ratio of frequency of revolution of electron in the second excited state of He⊕ and second state of hydrogen is
Answer» Ratio of frequency of revolution of electron in the second excited state of $H e^{\oplus}$ and second state of hydrogen is

Discussion

36.	In a certain solvent phenol dimerises to the extent of 60%. Its observed molecular mass in the solvent would be (M.M Phenol = 94)
Answer» In a certain solvent phenol dimerises to the extent of 60%. Its observed molecular mass in the solvent would be (M.M Phenol = 94)

Discussion

37.	In the above reaction 'Y' is -
Answer» In the above reaction 'Y' is -

Discussion

38.	The cell potential (Ecell) of a reaction is related as ΔG=nF Ecell, where ΔG represents maximum useful electrical work. n = no. of moles of electrons exchanged during the reaction. For reversible cell reaction d(ΔG)=(ΔV)dp−(ΔS)dT At const. P, d(ΔG)=−(ΔS)dT At const. P, ΔG=ΔH−TΔS ..(1) ∴ ΔG=ΔH+T(d(ΔG)ΔT)P. (2) (dEcelldT)p is known as temperature coefficient of the emf of the cell. The ΔS for the cell reaction Zn+2AgCl→ZnCl2+2Ag is
Answer» The cell potential $(E_{c e l l})$ of a reaction is related as $Δ G = n F E_{c e l l}$ , where $Δ G$ represents maximum useful electrical work. n = no. of moles of electrons exchanged during the reaction. For reversible cell reaction $d (Δ G) = (Δ V) d p - (Δ S) d T$ At const. P, $d (Δ G) = - (Δ S) d T$ At const. P, $Δ G = Δ H - T Δ S$ ..(1) $∴ Δ G = Δ H + T {(\frac{d (Δ G)}{Δ T})}_{P}$ . (2) ${(\frac{d E_{c e l l}}{d T})}_{p}$ is known as temperature coefficient of the emf of the cell. The $Δ S$ for the cell reaction $Z n + 2 A g C l \to Z n C l_{2} + 2 A g$ is

Discussion

39.	Graphite is soft solid lubricant extremely difficult to melt. The reason for this anomalous behavior is that graphite:
Answer» Graphite is soft solid lubricant extremely difficult to melt. The reason for this anomalous behavior is that graphite:

Discussion

40.	What is the full form of PAN
Answer» What is the full form of PAN

Discussion

41.	When orthoboric acid (H3BO3) is heated the residue left is:
Answer» When orthoboric acid $(H_{3} B O_{3})$ is heated the residue left is:

Discussion

42.	What volume of 0.3 M sulphuric acid is required to exactly neutralize 200 ml of 0.5 M NaOH?
Answer» What volume of 0.3 M sulphuric acid is required to exactly neutralize 200 ml of 0.5 M NaOH?

Discussion

43.	Which of the following reactions produce(s) propane as a major product?
Answer» Which of the following reactions produce(s) propane as a major product?

Discussion

44.	The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done on the system in going from A→B→C is 50 J and 20 calheat is given to the system. The change in internal energy between A and C is
Answer» The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done on the system in going from $A \to B \to C$ is 50 J and 20 calheat is given to the system. The change in internal energy between A and C is

Discussion

45.	Which of the following is correct structure of 3,3-Dibromo-2-chlorobutyl-2-methyl propanoate?
Answer» Which of the following is correct structure of 3,3-Dibromo-2-chlorobutyl-2-methyl propanoate?

Discussion

46.	A isomerises to B on addition of a trace amount of acid H2SO4. Compound (B) is:
Answer» A isomerises to B on addition of a trace amount of acid $H_{2} S O_{4} .$ Compound (B) is:

Discussion

47.	Question 28 Diamagnetic species are those which contain no unpaired electrons. Which among the following are diamagnetic? (a) N2 (b) N2−2 (c) O2 (d) O2−2
Answer» Question 28 Diamagnetic species are those which contain no unpaired electrons. Which among the following are diamagnetic? (a) $N_{2}$ (b) $N_{2}^{2 -}$ (c) $O_{2}$ (d) $O_{2}^{2 -}$

47.

Question 28 Diamagnetic species are those which contain no unpaired electrons. Which among the following are diamagnetic? (a) N2 (b) N2−2 (c) O2 (d) O2−2

Answer»

Question 28

Diamagnetic species are those which contain no unpaired electrons. Which among the following are diamagnetic?

(a) $N_{2}$

(b) $N_{2}^{2 -}$

(c) $O_{2}$

(d) $O_{2}^{2 -}$

Discussion

48.	Compounds with antiseptic properties are ............ (a) CHCl3 (b) CHl3 (c) boric acid (d) 0.3 ppm aqueous solution of C12
Answer» Compounds with antiseptic properties are ............ (a) $C H C l_{3}$ (b) $C H l_{3}$ (c) boric acid (d) 0.3 ppm aqueous solution of $C 1_{2}$

Discussion

49.	The 3s orbital has
Answer» The 3s orbital has

Discussion

50.	According to Born-Haber's cycle, the enthalpy of formation of ionic compounds can be determined. The formation of NaCl involves following steps – (i) Na(s)S−−−−−−−−−−−−−→Energy of subtimationNa(g) (ii) Na(g)I−−−−−−−−−−−→Ionisation potenitalNa+(g)+e− (iii) Cl2(g)D−−−−−−−−−−−−−−−→Bond dissociation energy2Cl(g) (iv) Cl(g)+e−E−−−−−−−−−−→Electron - affinityCl−(g) (v) Cl−(g)+Na+(g)U−−−−−−−−→Lattice energyNaCl(s) The enthalpy of formation of NaCl will be -
Answer» According to Born-Haber's cycle, the enthalpy of formation of ionic compounds can be determined. The formation of NaCl involves following steps – (i) $N a (s) S - ------------ \to Energy of subtimation N a (g)$ (ii) $N a (g) I - ---------- \to Ionisation potenital N a^{+} (g) + e^{-}$ (iii) $C l_{2} (g) D - -------------- \to Bond dissociation energy 2 C l (g)$ (iv) $C l (g) + e^{-} E - --------- \to Electron - affinity C l^{-} (g)$ (v) $C l^{-} (g) + N a^{+} (g) U - ------- \to Lattice energy N a C l (s)$ The enthalpy of formation of NaCl will be -

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

For the water gas reaction, C(s)+H2O(g)⇌CO(g)+H2(g) the standard Gibbs free energy of reaction (at 1000 K) is −8.1 kJ/mol. Calculate its equilibrium constant

Which compound would give 5-keto-2-methylhexanal upon ozonolysis?

Equal volumes of 1M HCl&amp; 1M H2SO4 are neutralized by 1M NaOH solution and x &amp; y KJ/equivalent of heat are liberated respectively. Which of the following relations is correct?

An analytic balance has uncertainty In measurement equal to ±1 mg. Then report the result in terms of percentage if the weight of a compound is (a) 1 g (b) 10 g (c) 100 g

One litre of a mixture of carbon monoxide and carbon dioxide is passed through a tube containing red hot charcoal ,the volume now becomes 1.6 litres. Volumes are measured under similar conditions. Find out the composition of gaseous mixture.

What you mean by packing fraction in 3D?

A photon of 300 nm is absorbed by a gas, which then re-emits two photons. One re-emitted photon has a wavelength of 400 nm. Calculate the energy of the other photon re-emitted out.

The heat of atomization of a compound XY3 in gaseous state is E kJ mol−1. What is the bond energy of X−Y bond in kJmol−1 unit?

Catalic cycle of enzyme action

In which of the following compounds are all the bond lengths equal?

What amount of bromine will be required to convert 2 gr of phenol in 2, 4, 6-tribromo phenol?

HBr reacts fastest with:

1mole of water has 16 g of oxygen atom i.e. 1 atom of oxygen. Is an atom really that much large to weigh 16 g?

An organic compound (C3H9N) (A) when treated with nitrous acid, gave an alcohol and N2 gas was evolved. (A) on warming with CHCl3 and caustic potash gave (C), which on reduction gave isopropylmethylamine. Predict the structure of (A).

17.4% (w/v) K2SO4 solution at 27°C is isotonic with 5.85% (w/v) NaCl solution at 27°C. If NaCl is 100% ionized, what is the % ionization of K2SO4 in aq. solution?

The important use of the reaction between potassium cyanide and haloalkane is that...

How much electricity is required in coulomb for the oxidation of ? (i) 1 mole of H2O to O2 ? (ii) 1 mole of FeO to Fe2O3 ?

Write the expression for the equilibrium constant, KC for each of the following reactions: (i) 2NOCl(g)↔2NO(g)+Cl2(g) (ii) 2Cu(NO3)2(aq)↔2CuO(S)+4NO2(g)+O2(g) (iii) CH3COOC2H5(aq)+H2O(l)↔CH3COOH(aq)+C2H5OH(aq) (iv) Fe3+(aq)+3OH−(aq)↔Fe(OH)3(s) (v) I2(s)+5F2↔2IF5

In the nth orbit, the energy of an electron En=−13.6n2 eV for hydrogen atom. The energy required to take the electron from first orbit to second orbit will be

Why is PF3 more acidic among all trihalides? i want correct vaule points from a real chemistry teacher

A soap bubble, blown by a mechanical pump at the mouth of a tube, increases in volume with time at a constant rate. The graph that correctly depicts the time dependence of pressure inside the bubble is given by

Describe the structure of the common form of ice.

Which of the following haloalkane will have the highest boiling point?

Which of the following point is not true about interstitial compounds?

Arrange the following in increasing acidic character Phenol, m - nitrophenol, m - chlorophenol, m - cresol I II III IV

Alumina, on electrolysis in presence of cryolite gives at anode:

The most stable conformation of trans-1,4-dimethylcyclohexane is represented as:

What is the molarity of an NaOH solution if 250 mL contains 1 mg of NaOH?

Which of the following is/are resonating structure(s) of phenoxide ion?

But-1-yne reacts with cold alkaline KMnO4 to produce

The density of 3M aqueous solution of sodium thiosulfate is 1.25g/mL. Calculate (1) mole fraction of sodium thiosulfate. (2) molalities of Na+ and S2O3 2- ions.

Magnesium cation has polarising power close to that of

Ratio of frequency of revolution of electron in the second excited state of He⊕ and second state of hydrogen is

In a certain solvent phenol dimerises to the extent of 60%. Its observed molecular mass in the solvent would be (M.M Phenol = 94)

In the above reaction 'Y' is -

Graphite is soft solid lubricant extremely difficult to melt. The reason for this anomalous behavior is that graphite:

What is the full form of PAN

When orthoboric acid (H3BO3) is heated the residue left is:

What volume of 0.3 M sulphuric acid is required to exactly neutralize 200 ml of 0.5 M NaOH?

Which of the following reactions produce(s) propane as a major product?

The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done on the system in going from A→B→C is 50 J and 20 calheat is given to the system. The change in internal energy between A and C is

Which of the following is correct structure of 3,3-Dibromo-2-chlorobutyl-2-methyl propanoate?

A isomerises to B on addition of a trace amount of acid H2SO4. Compound (B) is:

Question 28 Diamagnetic species are those which contain no unpaired electrons. Which among the following are diamagnetic? (a) N2 (b) N2−2 (c) O2 (d) O2−2

Compounds with antiseptic properties are ............ (a) CHCl3 (b) CHl3 (c) boric acid (d) 0.3 ppm aqueous solution of C12

The 3s orbital has

Equal volumes of 1M HCl& 1M H2SO4 are neutralized by 1M NaOH solution and x & y KJ/equivalent of heat are liberated respectively. Which of the following relations is correct?