46295 + Interview Questions in Chemistry

1.	does the moles of water and salt is same in a ny hydrated salt?for eg-Is it true to say that in BaCl2.2H20 no. of moles of water is equal to no.of moles of bacl2
Answer» does the moles of water and salt is same in a ny hydrated salt? for eg-Is it true to say that in BaCl2.2H20 no. of moles of water is equal to no.of moles of bacl2

Discussion

2.	Which of the following is aromatic in nature (Benzene)(Level V)
Answer» Which of the following is aromatic in nature (Benzene)(Level V)

2.

Which of the following is aromatic in nature (Benzene)(Level V)

Answer»

Which of the following is aromatic in nature (Benzene)(Level V)

Discussion

3.	1is\vert8.In an atom, the total number of electrons having quantum numbers n4, Im, = 1 and ms
Answer» 1is\vert8.In an atom, the total number of electrons having quantum numbers n4, Im, = 1 and ms

Discussion

4.	the gaseous mixture of H2 and CO2 gas contains 66 mass% of CO2 . find the vapour density of the mixture
Answer» the gaseous mixture of H2 and CO2 gas contains 66 mass% of CO2 . find the vapour density of the mixture

Discussion

5.	Kc for the reaction 12N2(g)+12O2(g)+12Br2(g)⇌NOBr(g) the following information at 298 K2NO(g)⇌N2(g)+O2(g) K1=2.4×1030NO(g)+12Br2(g)⇌NOBr(g) K2=1.4(Given : √12.4=0.645)
Answer» $K_{c}$ for the reaction $\frac{1}{2} N_{2} (g) + \frac{1}{2} O_{2} (g) + \frac{1}{2} B r_{2} (g) ⇌ N O B r (g)$ the following information at $298 K$ $2 N O (g) ⇌ N_{2} (g) + O_{2} (g) K_{1} = 2.4 \times 10^{30}$ $N O (g) + \frac{1}{2} B r_{2} (g) ⇌ N O B r (g) K_{2} = 1.4$ (Given : $\sqrt{\frac{1}{2.4}} = 0.645$ )

Discussion

6.	A solution of pH 2 is more acidic than the solution of pH 6 by a factor of 1. 100 2. 1000 3. 4000 4. 10000
Answer» A solution of pH 2 is more acidic than the solution of pH 6 by a factor of 1. 100 2. 1000 3. 4000 4. 10000

Discussion

7.	100 mL of 1.0 M solution of a monobasic acid (pKa=5) is titrated against Ca(OH)2 solution. At equivalence point the pH of solution is ?
Answer» 100 mL of 1.0 M solution of a monobasic acid $(p K_{a} = 5)$ is titrated against $C a (O H)_{2}$ solution. At equivalence point the pH of solution is ?

Discussion

8.	why more than 6 orbitals can't be used by ligand to donate electron pair to central metal atom?
Answer» why more than 6 orbitals can't be used by ligand to donate electron pair to central metal atom?

Discussion

9.	For BaCl3,AlCl3 and GaCl3 ionic character will be
Answer» For BaCl3,AlCl3 and GaCl3 ionic character will be

Discussion

10.	which of the following set is not correct 1.SO3,O3,NH4+ all have co ordinate bonds2.H20,NO2,ClO2- all are V shaped molecules3.I3-,ICl2-,NO2+4.SF4,SiF4,XeF4 are tetrahedral in shape
Answer» which of the following set is not correct 1.SO3,O3,NH4+ all have co ordinate bonds 2.H20,NO2,ClO2- all are V shaped molecules 3.I3-,ICl2-,NO2+ 4.SF4,SiF4,XeF4 are tetrahedral in shape

Discussion

11.	Which of the following is correct order of bond length?
Answer» Which of the following is correct order of bond length?

Discussion

12.	41. How many octahedral and tetrahedral voids are present in a single unit cell (closed packed)?
Answer» 41. How many octahedral and tetrahedral voids are present in a single unit cell (closed packed)?

Discussion

13.	H3PO4(98g mol−1) is 98% by mass of solution, If the density is 1.8 g/mL, the molarity is:
Answer» $H_{3} P O_{4} (98 g m o l^{- 1})$ is 98% by mass of solution, If the density is 1.8 g/mL, the molarity is:

Discussion

14.	explain oxidation reaction of alc9ohol with KmnO4 &H2crO4
Answer» explain oxidation reaction of alc9ohol with KmnO4 &H2crO4

Discussion

15.	10. A gauche interaction costs 3.8kj/mol, a hydrogen-hydrogen eclipsing interaction costs 4kj/mol, A hydrogen methyl eclipsing interaction costs 6kj/mol and a methyl- methyl eclipsing interaction costs 11kj/mol. What is the relative energy cost of the most stable comformers of 2,3-dimethylbutane ?
Answer» 10. A gauche interaction costs 3.8kj/mol, a hydrogen-hydrogen eclipsing interaction costs 4kj/mol, A hydrogen methyl eclipsing interaction costs 6kj/mol and a methyl- methyl eclipsing interaction costs 11kj/mol. What is the relative energy cost of the most stable comformers of 2,3-dimethylbutane ?

Discussion

16.	For the reaction, X(s)⇌Y(s)+Z(g), the plot of lnpzp0 versus 104T is given below (in solid line), where pz is the pressure (in bar ) of the gas Z at temperature T and p0=1 bar.(Given, d(ln K)d(1T)=−ΔH0R, where the equilibrium constant, K=pzp0 and the gas constant. R=8.314 JK−1 mol−1The value of standard enthalpy, ΔH0,(in kJ mol−1) for the given reaction is
Answer» For the reaction, $X (s) ⇌ Y (s) + Z (g)$ , the plot of $l n \frac{p_{z}}{p^{0}} versus \frac{10^{4}}{T}$ is given below (in solid line), where $p_{z}$ is the pressure (in $b a r$ ) of the gas $Z$ at temperature $T$ and $p^{0} = 1 b a r$ . (Given, $\frac{d (l n K)}{d (\frac{1}{T})} = - \frac{Δ H^{0}}{R}$ , where the equilibrium constant, $K = \frac{p_{z}}{p^{0}}$ and the gas constant. $R = 8.314 J K^{- 1} m o l^{- 1}$ The value of standard enthalpy, $Δ H^{0}, (i n k J m o l^{- 1})$ for the given reaction is

Discussion

17.	One mole of gas expand obeying ) p/v curve the max temp in this process is equal to
Answer» One mole of gas expand obeying ) p/v curve the max temp in this process is equal to

Discussion

18.	Which of the following statement(s) is/are correct?
Answer» Which of the following statement(s) is/are correct?

Discussion

19.	Which among the following is an endothermic process
Answer» Which among the following is an endothermic process

Discussion

20.	Which of them is the hardest among the following group of elements?
Answer» Which of them is the hardest among the following group of elements?

Discussion

21.	What is the increase in entropy when 11.2 L of Oare mixed with 11.2 L of H2 at STP?
Answer» What is the increase in entropy when 11.2 L of Oare mixed with 11.2 L of H2 at STP?

Discussion

22.	Which of the following gases will have a density of 1.9 g L−1 at 1520 torr pressure and 87 ∘C?
Answer» Which of the following gases will have a density of $1.9 {g L}^{- 1}$ at 1520 torr pressure and $87^{\circ} C$ ?

Discussion

23.	In which of the following entropy decreases ?
Answer» In which of the following entropy decreases ?

Discussion

24.	Hardness of water can be detected by using:
Answer» Hardness of water can be detected by using:

Discussion

25.	39. What will be the product formed when 3methyl butanol is treated with concentrated sulphuric acid?
Answer» 39. What will be the product formed when 3methyl butanol is treated with concentrated sulphuric acid?

Discussion

26.	Major product (A) of this reaction is:
Answer» Major product (A) of this reaction is:

Discussion

27.	Which of the following complexes are heteroleptic? (a)[Cr(NH3)6]3+ (b)[Fe(NH3)4Cl2]+ (c)[Mn(CN)6]4− (d)[Co(NH3)4Cl2]
Answer» Which of the following complexes are heteroleptic? (a) $[C r (N H_{3})_{6}]^{3 +}$ (b) $[F e (N H_{3})_{4} C l_{2}]^{+}$ (c) $[M n (C N)_{6}]^{4 -}$ (d) $[C o (N H_{3})_{4} C l_{2}]$

Discussion

28.	Some words related with silk are jumbled up. Write them in their correct form(a)TURECULRISE(b) WILSMORK(c) BELMURRY(d) RINGLEE
Answer» Some words related with silk are jumbled up. Write them in their correct form (a)TURECULRISE (b) WILSMORK (c) BELMURRY (d) RINGLEE

Discussion

29.	two liquids warm up whrn they are mixed. what deviation is showed by the ( use only clausius clapeyron equation)
Answer» two liquids warm up whrn they are mixed. what deviation is showed by the ( use only clausius clapeyron equation)

Discussion

30.	What is the differentiation of -cosx with respect to x equals to?
Answer» What is the differentiation of -cosx with respect to x equals to?

Discussion

31.	At stp some molecules of h2(g) occupy a volume of X litres . Under the same condition volume occupied by half the number of molecules of O3 ( ozone) gas is ?1. X L 2. X/2 L3. 2X L4. X/4
Answer» At stp some molecules of h2(g) occupy a volume of X litres . Under the same condition volume occupied by half the number of molecules of O3 ( ozone) gas is ? 1. X L 2. X/2 L 3. 2X L 4. X/4

Discussion

32.	Calculate the entropy change in surroundings when 1.00 mol of H2O(l) is formed under standard conditions. ΔfHθ=−286 kJ mol−1.
Answer» Calculate the entropy change in surroundings when 1.00 mol of $H_{2} O_{(l)}$ is formed under standard conditions. $Δ_{f} H^{θ} = - 286 k J m o l^{- 1}$ .

Discussion

33.	In order to stabilize the system shown in figure Ti should satisfy,
Answer» In order to stabilize the system shown in figure $T_{i}$ should satisfy,

Discussion

34.	The table shown below gives the bond dissociation energies (Edis) for single covalent bonds of carbon (C) atoms with element ′A′, ′B′, ′C′ and ′D′. Which element has the smallest size? BondEdis(kJ mol−1)C−A240C−B328C−C276C−D485
Answer» The table shown below gives the bond dissociation energies $(E_{d i s})$ for single covalent bonds of carbon $(C)$ atoms with element $^{'} A^{'},^{'} B^{'},^{'} C^{'}$ and $^{'} D^{'}$ . Which element has the smallest size? $\begin{matrix} Bond & E_{d i s} ({kJ mol}^{- 1}) C - A & 240 C - B & 328 C - C & 276 C - D & 485 \end{matrix}$

Discussion

35.	Does in both SN1 and SN2 reaction the order of reactivity of alkyl halides is same that is :- R-I > R-Br > R-Cl > R-F?
Answer» Does in both SN1 and SN2 reaction the order of reactivity of alkyl halides is same that is :- R-I > R-Br > R-Cl > R-F?

Discussion

36.	What is meant by &quotwith respect to " and " with reference to " which I have studied in refractive index
Answer» What is meant by "with respect to " and " with reference to " which I have studied in refractive index

Discussion

37.	what is a bonding of molecule
Answer» what is a bonding of molecule

Discussion

38.	The number of geometric isomers that can exist for square planar [Pt(Cl)(py)(NH3)(NH2OH)]⨁ is (py = pyridine) :
Answer» The number of geometric isomers that can exist for square planar $[P t (C l) (p y) (N H_{3}) (N H_{2} O H)]^{⨁}$ is (py = pyridine) :

Discussion

39.	The correct order of acidic strength of the following alcohols is
Answer» The correct order of acidic strength of the following alcohols is

Discussion

40.	The mole fraction of a solute in a solution is 0.1. At 298 K, molarity of this solution is the same as its molality. Density of this solution at 298 K is 2.0 g cm−3. The ratio of the molecular weights of the solute and solvent, (msolutemsolvent) is
Answer» The mole fraction of a solute in a solution is $0.1$ . At $298 K$ , molarity of this solution is the same as its molality. Density of this solution at $298 K$ is $2.0 {g cm}^{- 3}$ . The ratio of the molecular weights of the solute and solvent, $(\frac{m_{solute}}{m_{solvent}})$ is

Discussion

41.	What is positive and negative gain enthalpy? What is their perodic trend in the periodic table?
Answer» What is positive and negative gain enthalpy? What is their perodic trend in the periodic table?

Discussion

42.	The number of chiral carbons in Pyranose form of glucose is
Answer» The number of chiral carbons in Pyranose form of glucose is

Discussion

43.	If the wavelength of the n'th line of the Lyman series it's equal to the de broglie wavelength of the electron in the initial orbit of the hydrogen like element (Z=5) , find the value of n .
Answer» If the wavelength of the n'th line of the Lyman series it's equal to the de broglie wavelength of the electron in the initial orbit of the hydrogen like element (Z=5) , find the value of n .

Discussion

44.	which group of atoms have nearly same atomic radius 1.Na,K,Rb,Cs 2.Li,Be,B,C 3.Fe,Co,Ni 4.F,Cl,Br,
Answer» which group of atoms have nearly same atomic radius 1.Na,K,Rb,Cs 2.Li,Be,B,C 3.Fe,Co,Ni 4.F,Cl,Br,

Discussion

45.	Is combustion an oxidation or a reduction process?
Answer» Is combustion an oxidation or a reduction process?

Discussion

46.	Which of the following solutions will have pH close to 1.0?
Answer» Which of the following solutions will have pH close to 1.0?

Discussion

47.	Properties such as boiling point, freezing point and vapour pressure of a pure solvent change when solute molecules are added to get homogeneous solution. These are called colligative properties. Applications of colligative properties are very useful in day-to - day life. One of its examples is the use of ethylene glycol and water mixture as anti-freezing liquid in the radiator of automobiles. A solution M is prepared by mixing ethanol and water. The mole fraction of ethanol in the mixture is 0.9. Given, freezing point depression constant of water (Kwaterf)=1.86Kkg mol–1 Freezing point depression constant of ethanol (Kwaterb)=2.0Kkg mol–1 Boiling point elevation constant of water (Kwaterb)=0.52Kkg mol–1 Boiling point elevation constant of ethanol (Kethanolb)=1.2Kkg mol−1 Standard freezing point of water = 273 K Standard freezing point of ethanol = 155.7 K Standard boiling point of water = 373 K Standard boiling point of ethanol = 351.5K Vapour pressure of pure water = 32.8 mm Hg Vapour pressure of pure ethanol = 40 mm Hg Molecular weight of water =18g mol−1 Molecular weight of ethanol =46gmol−1 In answering the following questions, consider the solutions to be ideal dilute solutions and solutes to be non-volatile and non-dissociative. Water is added to the solution M such that the mole fraction of water in the solution becomes 0.9. The boiling point of this solution is -
Answer» Properties such as boiling point, freezing point and vapour pressure of a pure solvent change when solute molecules are added to get homogeneous solution. These are called colligative properties. Applications of colligative properties are very useful in day-to - day life. One of its examples is the use of ethylene glycol and water mixture as anti-freezing liquid in the radiator of automobiles. A solution M is prepared by mixing ethanol and water. The mole fraction of ethanol in the mixture is 0.9. Given, freezing point depression constant of water $(K_{f}^{w a t e r}) = 1.86 K k g m o l^{- 1}$ Freezing point depression constant of ethanol $(K_{b}^{w a t e r}) = 2.0 K k g m o l^{- 1}$ Boiling point elevation constant of water $(K_{b}^{w a t e r}) = 0.52 K k g m o l^{- 1}$ Boiling point elevation constant of ethanol $(K_{b}^{e t h a n o l}) = 1.2 K k g m o l^{- 1}$ Standard freezing point of water = 273 K Standard freezing point of ethanol = 155.7 K Standard boiling point of water = 373 K Standard boiling point of ethanol = 351.5K Vapour pressure of pure water = 32.8 mm Hg Vapour pressure of pure ethanol = 40 mm Hg Molecular weight of water $= 18 g m o l^{- 1}$ Molecular weight of ethanol $= 46 g m o l^{- 1}$ In answering the following questions, consider the solutions to be ideal dilute solutions and solutes to be non-volatile and non-dissociative. Water is added to the solution M such that the mole fraction of water in the solution becomes 0.9. The boiling point of this solution is -

47.

Properties such as boiling point, freezing point and vapour pressure of a pure solvent change when solute molecules are added to get homogeneous solution. These are called colligative properties. Applications of colligative properties are very useful in day-to - day life. One of its examples is the use of ethylene glycol and water mixture as anti-freezing liquid in the radiator of automobiles. A solution M is prepared by mixing ethanol and water. The mole fraction of ethanol in the mixture is 0.9. Given, freezing point depression constant of water (Kwaterf)=1.86Kkg mol–1 Freezing point depression constant of ethanol (Kwaterb)=2.0Kkg mol–1 Boiling point elevation constant of water (Kwaterb)=0.52Kkg mol–1 Boiling point elevation constant of ethanol (Kethanolb)=1.2Kkg mol−1 Standard freezing point of water = 273 K Standard freezing point of ethanol = 155.7 K Standard boiling point of water = 373 K Standard boiling point of ethanol = 351.5K Vapour pressure of pure water = 32.8 mm Hg Vapour pressure of pure ethanol = 40 mm Hg Molecular weight of water =18g mol−1 Molecular weight of ethanol =46gmol−1 In answering the following questions, consider the solutions to be ideal dilute solutions and solutes to be non-volatile and non-dissociative. Water is added to the solution M such that the mole fraction of water in the solution becomes 0.9. The boiling point of this solution is -

Answer»

Properties such as boiling point, freezing point and vapour pressure of a pure solvent change when solute molecules are added to get homogeneous solution. These are called colligative properties. Applications of colligative properties are very useful in day-to - day life.
One of its examples is the use of ethylene glycol and water mixture as anti-freezing liquid in the radiator of automobiles.
A solution M is prepared by mixing ethanol and water. The mole fraction of ethanol in the mixture is 0.9.
Given, freezing point depression constant of water
$(K_{f}^{w a t e r}) = 1.86 K k g m o l^{- 1}$
Freezing point depression constant of ethanol
$(K_{b}^{w a t e r}) = 2.0 K k g m o l^{- 1}$
Boiling point elevation constant of water
$(K_{b}^{w a t e r}) = 0.52 K k g m o l^{- 1}$
Boiling point elevation constant of ethanol
$(K_{b}^{e t h a n o l}) = 1.2 K k g m o l^{- 1}$
Standard freezing point of water = 273 K
Standard freezing point of ethanol = 155.7 K
Standard boiling point of water = 373 K
Standard boiling point of ethanol = 351.5K
Vapour pressure of pure water = 32.8 mm Hg
Vapour pressure of pure ethanol = 40 mm Hg
Molecular weight of water $= 18 g m o l^{- 1}$
Molecular weight of ethanol $= 46 g m o l^{- 1}$
In answering the following questions, consider the solutions to be ideal dilute solutions and solutes to be non-volatile and non-dissociative.

Water is added to the solution M such that the mole fraction of water in the solution becomes 0.9. The boiling point of this solution is -

Discussion

48.	Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Chemicat messenger gives message to the cell without entering the cell. Reason (R) Chemical messenger is received at the binding site of receptor proteins.
Answer» Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Chemicat messenger gives message to the cell without entering the cell. Reason (R) Chemical messenger is received at the binding site of receptor proteins.

48.

Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Chemicat messenger gives message to the cell without entering the cell. Reason (R) Chemical messenger is received at the binding site of receptor proteins.

Answer»

Assertion and Reason
In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice..
(a) Assertion and reason both are correct statements but reason does not explain assertion.
(b) Assertion and reason both are correct and reason explains asssWon.
(c) Both assertion and reason are Wrong statements.
(d) Assertion is correct statement reason is wrong statement.
(e) Assertion is wrong statement reason is correct statement.

Assertion (A) Chemicat messenger gives message to the cell without entering the cell.
Reason (R) Chemical messenger is received at the binding site of receptor proteins.

Discussion

49.	Which compound would give 5−keto−2−methyl hexanal upon ozonlysis?
Answer» Which compound would give $5 - k e t o - 2 - methyl hexanal$ upon ozonlysis?

Discussion

50.	What is chemical formula of slaked lime ?
Answer» What is chemical formula of slaked lime ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

does the moles of water and salt is same in a ny hydrated salt?for eg-Is it true to say that in BaCl2.2H20 no. of moles of water is equal to no.of moles of bacl2

Which of the following is aromatic in nature (Benzene)(Level V)

1is\vert8.In an atom, the total number of electrons having quantum numbers n4, Im, = 1 and ms

the gaseous mixture of H2 and CO2 gas contains 66 mass% of CO2 . find the vapour density of the mixture

Kc for the reaction 12N2(g)+12O2(g)+12Br2(g)⇌NOBr(g) the following information at 298 K2NO(g)⇌N2(g)+O2(g) K1=2.4×1030NO(g)+12Br2(g)⇌NOBr(g) K2=1.4(Given : √12.4=0.645)

A solution of pH 2 is more acidic than the solution of pH 6 by a factor of 1. 100 2. 1000 3. 4000 4. 10000

100 mL of 1.0 M solution of a monobasic acid (pKa=5) is titrated against Ca(OH)2 solution. At equivalence point the pH of solution is ?

why more than 6 orbitals can't be used by ligand to donate electron pair to central metal atom?

For BaCl3,AlCl3 and GaCl3 ionic character will be

which of the following set is not correct 1.SO3,O3,NH4+ all have co ordinate bonds2.H20,NO2,ClO2- all are V shaped molecules3.I3-,ICl2-,NO2+4.SF4,SiF4,XeF4 are tetrahedral in shape

Which of the following is correct order of bond length?

41. How many octahedral and tetrahedral voids are present in a single unit cell (closed packed)?

H3PO4(98g mol−1) is 98% by mass of solution, If the density is 1.8 g/mL, the molarity is:

explain oxidation reaction of alc9ohol with KmnO4 &H2crO4

10. A gauche interaction costs 3.8kj/mol, a hydrogen-hydrogen eclipsing interaction costs 4kj/mol, A hydrogen methyl eclipsing interaction costs 6kj/mol and a methyl- methyl eclipsing interaction costs 11kj/mol. What is the relative energy cost of the most stable comformers of 2,3-dimethylbutane ?

One mole of gas expand obeying ) p/v curve the max temp in this process is equal to

Which of the following statement(s) is/are correct?

Which among the following is an endothermic process

Which of them is the hardest among the following group of elements?

What is the increase in entropy when 11.2 L of Oare mixed with 11.2 L of H2 at STP?

Which of the following gases will have a density of 1.9 g L−1 at 1520 torr pressure and 87 ∘C?

In which of the following entropy decreases ?

Hardness of water can be detected by using:

39. What will be the product formed when 3methyl butanol is treated with concentrated sulphuric acid?

Major product (A) of this reaction is:

Which of the following complexes are heteroleptic? (a)[Cr(NH3)6]3+ (b)[Fe(NH3)4Cl2]+ (c)[Mn(CN)6]4− (d)[Co(NH3)4Cl2]

Some words related with silk are jumbled up. Write them in their correct form(a)TURECULRISE(b) WILSMORK(c) BELMURRY(d) RINGLEE

two liquids warm up whrn they are mixed. what deviation is showed by the ( use only clausius clapeyron equation)

What is the differentiation of -cosx with respect to x equals to?

At stp some molecules of h2(g) occupy a volume of X litres . Under the same condition volume occupied by half the number of molecules of O3 ( ozone) gas is ?1. X L 2. X/2 L3. 2X L4. X/4

Calculate the entropy change in surroundings when 1.00 mol of H2O(l) is formed under standard conditions. ΔfHθ=−286 kJ mol−1.

In order to stabilize the system shown in figure Ti should satisfy,

The table shown below gives the bond dissociation energies (Edis) for single covalent bonds of carbon (C) atoms with element ′A′, ′B′, ′C′ and ′D′. Which element has the smallest size? BondEdis(kJ mol−1)C−A240C−B328C−C276C−D485

Does in both SN1 and SN2 reaction the order of reactivity of alkyl halides is same that is :- R-I > R-Br > R-Cl > R-F?

What is meant by &quotwith respect to " and " with reference to " which I have studied in refractive index

what is a bonding of molecule

The number of geometric isomers that can exist for square planar [Pt(Cl)(py)(NH3)(NH2OH)]⨁ is (py = pyridine) :

The correct order of acidic strength of the following alcohols is

The mole fraction of a solute in a solution is 0.1. At 298 K, molarity of this solution is the same as its molality. Density of this solution at 298 K is 2.0 g cm−3. The ratio of the molecular weights of the solute and solvent, (msolutemsolvent) is

What is positive and negative gain enthalpy? What is their perodic trend in the periodic table?

The number of chiral carbons in Pyranose form of glucose is

If the wavelength of the n'th line of the Lyman series it's equal to the de broglie wavelength of the electron in the initial orbit of the hydrogen like element (Z=5) , find the value of n .

which group of atoms have nearly same atomic radius 1.Na,K,Rb,Cs 2.Li,Be,B,C 3.Fe,Co,Ni 4.F,Cl,Br,

Is combustion an oxidation or a reduction process?

Which of the following solutions will have pH close to 1.0?

Which compound would give 5−keto−2−methyl hexanal upon ozonlysis?

What is chemical formula of slaked lime ?