46295 + Interview Questions in Chemistry

1.	Calculate the standard cell potentials of galvanic cell in which the following reactions take place : (i) 2Cr(s)+3Cd2+(aq)→2Cr3+(aq)+3Cd (ii) Fe2+(aq)+Ag+(aq)→Fe3+(aq)+Ag(s) Calculate the ΔrG∘ and equilibrium constant for the reactions
Answer» Calculate the standard cell potentials of galvanic cell in which the following reactions take place : (i) $2 C r (s) + 3 C d^{2 +} (a q) \to 2 C r^{3 +} (a q) + 3 C d$ (ii) $F e^{2 +} (a q) + A g^{+} (a q) \to F e^{3 +} (a q) + A g (s)$ Calculate the $Δ_{r} G^{\circ}$ and equilibrium constant for the reactions

1.

Calculate the standard cell potentials of galvanic cell in which the following reactions take place : (i) 2Cr(s)+3Cd2+(aq)→2Cr3+(aq)+3Cd (ii) Fe2+(aq)+Ag+(aq)→Fe3+(aq)+Ag(s) Calculate the ΔrG∘ and equilibrium constant for the reactions

Answer»

Calculate the standard cell potentials of galvanic cell in which the following reactions take place :

(i) $2 C r (s) + 3 C d^{2 +} (a q) \to 2 C r^{3 +} (a q) + 3 C d$

(ii) $F e^{2 +} (a q) + A g^{+} (a q) \to F e^{3 +} (a q) + A g (s)$

Calculate the $Δ_{r} G^{\circ}$ and equilibrium constant for the reactions

2.	The RMS velocity of hydrogen is √7 times the RMS velocity of nitrogen. If T is the temperature of the gas, then:
Answer» The RMS velocity of hydrogen is $\sqrt{7}$ times the RMS velocity of nitrogen. If $T$ is the temperature of the gas, then:

Discussion

3.	A chloride of vanadium has a magnetic moment of 1.732 BM. It's formula could be:
Answer» A chloride of vanadium has a magnetic moment of 1.732 BM. It's formula could be:

Discussion

4.	Which of the following compounds has the most negative heat of hydrogenation?
Answer» Which of the following compounds has the most negative heat of hydrogenation?

Discussion

5.	Consider the following reaction and identify (B).
Answer» Consider the following reaction and identify (B).

Discussion

6.	Which of the following polymer can be formed by using the following monomer unit? (a) Nylon-6, 6 (b) Nylon-2-nylon-6 (c) Melamine polymer (d) Nylon - 6
Answer» Which of the following polymer can be formed by using the following monomer unit? (a) Nylon-6, 6 (b) Nylon-2-nylon-6 (c) Melamine polymer (d) Nylon - 6

6.

Which of the following polymer can be formed by using the following monomer unit? (a) Nylon-6, 6 (b) Nylon-2-nylon-6 (c) Melamine polymer (d) Nylon - 6

Answer»

Which of the following polymer can be formed by using the following monomer unit?

(a) Nylon-6, 6

(b) Nylon-2-nylon-6

(c) Melamine polymer

(d) Nylon - 6

Discussion

7.	Distinction between primary, secondary and tertiary alcohol is done by [MP PMT/PET 1988; RPMT 2000]
Answer» Distinction between primary, secondary and tertiary alcohol is done by [MP PMT/PET 1988; RPMT 2000]

Discussion

8.	A buffer solution of pH=4 is to be prepared, using CH3COOH and CH3COONa. The concentration of acetic acid and sodium acetate are 110 M and x M. How much will the pH be if 1.5 L of H2O is added to above buffer ? Ka(CH3COOH)=4.7447
Answer» A buffer solution of $p H = 4$ is to be prepared, using $C H_{3} C O O H$ and $C H_{3} C O O N a .$ The concentration of acetic acid and sodium acetate are $\frac{1}{10} M$ and $x M$ . How much will the $p H$ be if $1.5 L$ of $H_{2} O$ is added to above buffer ? $K_{a} (C H_{3} C O O H) = 4.7447$

Discussion

9.	A certain quantity of ideal gas takes up 56 J of heat in the process AB and 360 J in the process AC. Then the number of degrees of freedom of the gas are
Answer» A certain quantity of ideal gas takes up 56 J of heat in the process AB and 360 J in the process AC. Then the number of degrees of freedom of the gas are

Discussion

10.	An alloy of Cu, Ag and Au is found to have copper in a CCP lattice. If the silver atoms occupy the edge centre and gold is present at the body centre, the alloy has a formula:
Answer» An alloy of Cu, Ag and Au is found to have copper in a CCP lattice. If the silver atoms occupy the edge centre and gold is present at the body centre, the alloy has a formula:

Discussion

11.	What is the equivalent mass of H2SO4 for the given reaction? (Molar mass is given as ‘M’) H2SO4+NaOH→NaHSO4+H2O
Answer» What is the equivalent mass of $H_{2} S O_{4}$ for the given reaction? (Molar mass is given as ‘M’) $H_{2} S O_{4} + N a O H \to N a H S O_{4} + H_{2} O$

Discussion

12.	For a common emitter configuration, if α and have β their usual meanings, the incorrect relationship between α and β is:
Answer» For a common emitter configuration, if $α$ and have $β$ their usual meanings, the incorrect relationship between $α$ and $β$ is:

Discussion

13.	0.0833 mol of a carbohydrate of empirical formula CH2O contain 1 g of hydrogen. The molecular formula of the carbohydrate is:
Answer» 0.0833 mol of a carbohydrate of empirical formula $C H_{2} O$ contain $1 g$ of hydrogen. The molecular formula of the carbohydrate is:

Discussion

14.	Which among the given molecules can exhibit tautomerism?
Answer» Which among the given molecules can exhibit tautomerism?

Discussion

15.	Define the following terms with a suitable example in each : (i) Broad-spectrum antibiotics (ii) Disinfectants (iii) Cationic detergents
Answer» Define the following terms with a suitable example in each : (i) Broad-spectrum antibiotics (ii) Disinfectants (iii) Cationic detergents

Discussion

16.	An open vessel at 27oC is heated until 38th of the air in it has been expelled. Assuming that the volume remains constant, calculate the temperature to which the vessel was heated.
Answer» An open vessel at $27^{o} C$ is heated until ${\frac{3}{8}}^{t h}$ of the air in it has been expelled. Assuming that the volume remains constant, calculate the temperature to which the vessel was heated.

Discussion

17.	For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, △U and W correspond to
Answer» For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, $△ U$ and W correspond to

Discussion

18.	The acid having O - O linkage is
Answer» The acid having O - O linkage is

Discussion

19.	The magnitude of angular momentum, orbit radius and frequency of revolution of electron in hydrogen atom corresponding to quantum number n are L, r and f respectively. Then according to Bohr's theory of hydrogen atom,
Answer» The magnitude of angular momentum, orbit radius and frequency of revolution of electron in hydrogen atom corresponding to quantum number n are L, r and f respectively. Then according to Bohr's theory of hydrogen atom,

Discussion

20.	What is the value of Electron gain enthalpy of Na+, if IE1 of Na=5.1 eV .
Answer» What is the value of Electron gain enthalpy of $N a^{+}$ , if $I E_{1}$ of $N a = 5.1 e V$ .

Discussion

21.	An ion has electronic configuration [Kr]4d4 placed in group 6 in the modern periodic table. The ion is:
Answer» An ion has electronic configuration $[K r] 4 d^{4}$ placed in group 6 in the modern periodic table. The ion is:

Discussion

22.	A barometer is constructed with its tube having radius 1.0mm . Assume that the surface of mercury in the tube is spherical in shape. If the atmospheric pressure is equal to 76 cm mercury, what will be the height raised in the barometer tube ? The contact angle of mercury with glass = 135∘ and surface tension of mercury = 0.465Nm−1. Density of mercury = 13600 kg m ^{-3} \).
Answer» A barometer is constructed with its tube having radius 1.0mm . Assume that the surface of mercury in the tube is spherical in shape. If the atmospheric pressure is equal to 76 cm mercury, what will be the height raised in the barometer tube ? The contact angle of mercury with glass = $135^{\circ}$ and surface tension of mercury = $0.465 N m^{- 1}$ . Density of mercury = 13600 kg m ^{-3} \).

Discussion

23.	Find the number of waves made by a Bohr electron in one complete revolution in the 3rd orbit.
Answer» Find the number of waves made by a Bohr electron in one complete revolution in the $3^{r d}$ orbit.

Discussion

24.	What are biodegradable and non-biodegradable detergents? Give one example of each.
Answer» What are biodegradable and non-biodegradable detergents? Give one example of each.

Discussion

25.	Two electrons occupying the same orbital may be distinguished by:
Answer» Two electrons occupying the same orbital may be distinguished by:

Discussion

26.	Find the total number of stereoisomers of bisbutane-2,3-diammineplatinum(II) sulfate.
Answer» Find the total number of stereoisomers of bisbutane-2,3-diammineplatinum(II) sulfate.

Discussion

27.	During nuclear explosion one of the products is 90Sr with half-life of 28.1 yr. If 1 μg of 90Sr was absorbed in the bones of a newly born baby instead of calcium, how much of it will remain after 10 yr and 60 yr if it is not lost metabolically?
Answer» During nuclear explosion one of the products is $^{90} S r$ with half-life of 28.1 yr. If $1 μ g$ of $^{90} S r$ was absorbed in the bones of a newly born baby instead of calcium, how much of it will remain after 10 yr and 60 yr if it is not lost metabolically?

Discussion

28.	Solubility products of Al(OH)3 and Zn(OH)2 are 2.7×10−23 and 3.2×10−14 respectively. If to a solution of 0.1 M each of Al3+ and Zn2+ions,NH4OH is added in increasing amounts which of the following will be precipitated first ?
Answer» Solubility products of $A l (O H)_{3}$ and $Z n (O H)_{2}$ are $2.7 \times 10^{- 23} a n d 3.2 \times 10^{- 14}$ respectively. If to a solution of 0.1 M each of $A l^{3 +} a n d Z n^{2 +} i o n s, N H_{4} O H$ is added in increasing amounts which of the following will be precipitated first ?

Discussion

29.	Lithium borohydride crystallizes in an orthorhombic system with 4 molecules per unit cell. The unit cell dimensions are a = 6.8 ∘A , b = 4.4 ∘A and c = 7.2 ∘A. If the molar mass is 21.76 g, calculate density of the crystal.
Answer» Lithium borohydride crystallizes in an orthorhombic system with 4 molecules per unit cell. The unit cell dimensions are a = 6.8 $\circ A$ , b = 4.4 $\circ A$ and c = 7.2 $\circ A$ . If the molar mass is 21.76 g, calculate density of the crystal.

Discussion

30.	The vapour density of PCl5 is 104.25 but when heated to 230oC, its vapour density is reduced to 62. The decomposition reaction of PCl5 on heating is PCl5(g)⇌PCl3(g)+Cl2(g) Calculate the degree of dissociation of PCl5 at this temperature :
Answer» The vapour density of $P C l_{5}$ is $104.25$ but when heated to $230^{o} C,$ its vapour density is reduced to $62$ . The decomposition reaction of $P C l_{5}$ on heating is $P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)$ Calculate the degree of dissociation of $P C l_{5}$ at this temperature :

Discussion

31.	Which of the following trihalides is not hydrolysed by water?
Answer» Which of the following trihalides is not hydrolysed by water?

Discussion

32.	Nitric acid is the most important oxi-acid formed by nitrogen. It is one of the major industrial chemicals and is widely used. Nitric acid is manufactured by the catalytic oxidation of ammonia that is known as Ostwald Process which can be represented by sequence of reactions shown below 4NH3+5O2(g)Catalyst−−−−−→Pt/Rh4NO(g)+6H2O(g) ...(i) 2NO(g)+O2(g)1120 K−−−−→2NO2(g) ...(ii) 3NO2(g)+H2O(l)→2HNO3(aq)+NO(g) ...(iii) The aqueous nitric acid obtained by this method can be concenteated by distillation to 68.5% by weight. Further concentration to 98% acid can be achieved by dehydration with concentrated sulphuric acid. If 170 kg of NH3 is heated in excess of oxygen, then the volume of H2O(l) produced in 1st reaction at STP is (Given that density of water is 1gml)
Answer» Nitric acid is the most important oxi-acid formed by nitrogen. It is one of the major industrial chemicals and is widely used. Nitric acid is manufactured by the catalytic oxidation of ammonia that is known as Ostwald Process which can be represented by sequence of reactions shown below $4 N H_{3} + 5 O_{2} (g) C a t a l y s t - ---- \to P t / R h 4 N O (g) + 6 H_{2} O (g) . . . (i)$ $2 N O (g) + O_{2} (g) 1120 K - --- \to 2 N O_{2} (g) . . . (i i)$ $3 N O_{2} (g) + H_{2} O (l) \to 2 H N O_{3} (a q) + N O (g) . . . (i i i)$ The aqueous nitric acid obtained by this method can be concenteated by distillation to $68.5 %$ by weight. Further concentration to $98 %$ acid can be achieved by dehydration with concentrated sulphuric acid. If $170 k g$ of $N H_{3}$ is heated in excess of oxygen, then the volume of $H_{2} O (l)$ produced in $1^{s t}$ reaction at STP is (Given that density of water is $1 \frac{g}{m l}$ )

Discussion

33.	Calculate ΔH at 358 K for the reaction, Fe2O3(s)+3H2(g) → 2Fe(s)+3H2O(l) Given that , ΔH298=−33.29 kJ mol−1 and CP for Fe2O3(s), Fe(s), H2O(l) and H2(g) are 103.8, 25.1, 75.3, and 28.8 J/K mol.
Answer» Calculate $Δ H$ at $358 K$ for the reaction, $F e_{2} O_{3} (s) + 3 H_{2} (g) \to 2 F e (s) + 3 H_{2} O (l)$ Given that , $Δ H_{298} = - 33.29 k J m o l^{- 1}$ and $C_{P} f o r F e_{2} O_{3} (s), F e (s), H_{2} O (l)$ and $H_{2} (g)$ are $103.8, 25.1, 75.3, a n d 28.8 J / K m o l$ .

Discussion

34.	Which of these isoelectronic species has the smallest radius?
Answer» Which of these isoelectronic species has the smallest radius?

Discussion

35.	Name the macro-molecules that are chosen as drug targets.
Answer» Name the macro-molecules that are chosen as drug targets.

Discussion

36.	Sulphur reacts with chlorine in 1 : 2 ratio and forms X. Hydrolysis of X gives a sulphur compound Y. What is the hybridization state of central atom in the anion of Y?
Answer» Sulphur reacts with chlorine in 1 : 2 ratio and forms X. Hydrolysis of X gives a sulphur compound Y. What is the hybridization state of central atom in the anion of Y?

Discussion

37.	Which hydrocarbons will have the least dipole moment?
Answer» Which hydrocarbons will have the least dipole moment?

Discussion

38.	Why should we remove an electron from a gaseous atom?
Answer» Why should we remove an electron from a gaseous atom?

Discussion

39.	Which of the following will undergo a faster SN2?.
Answer» Which of the following will undergo a faster $S_{N} 2$ ?.

Discussion

40.	The heat of neutrailisation of NaOH and HCL is 57.3 KJ/mole.What will be the amount of heat evolved when 2mole of NaOH and HCL are reacted
Answer» The heat of neutrailisation of NaOH and HCL is 57.3 KJ/mole.What will be the amount of heat evolved when 2mole of NaOH and HCL are reacted

Discussion

41.	In the given reaction 5H2O2+xClO2+2OH−→yCl−+zO2+6H2O The values of x, y and z are:
Answer» In the given reaction $5 H_{2} O_{2} + x C l O_{2} + 2 O H^{-} \to y C l^{-} + z O_{2} + 6 H_{2} O$ The values of x, y and z are:

41.

In the given reaction 5H2O2+xClO2+2OH−→yCl−+zO2+6H2O The values of x, y and z are:

Answer»

In the given reaction

$5 H_{2} O_{2} + x C l O_{2} + 2 O H^{-} \to y C l^{-} + z O_{2} + 6 H_{2} O$

The values of x, y and z are:

Discussion

42.	Explain the uses of carboxylic acid.
Answer» Explain the uses of carboxylic acid.

Discussion

43.	Solutions of0.1 N NH4OH and 0.1N NH4Cl has pH 9.25. Then PKb of NH4OH is
Answer» Solutions of $0.1 N N H_{4} O H and 0.1 N N H_{4} C l$ has pH 9.25. Then $P K_{b} o f N H_{4} O H$ is

Discussion

44.	Which of the following diagrams is of impurity defect?
Answer» Which of the following diagrams is of impurity defect?

Discussion

45.	COF2(g) passed over catalyst at 1000 ∘C comes to equilibrium: 2COF2(g)⇌CO2(g)+CF4(g) Analysis of the equilibrium mixture (after quick cooling to freeze the equilibrium) show that 500 ml of the equilibrium mixture (STP) contain 300 ml (STP) of (COF2+CO2) taking the total pressure to be 10 atm. The value of Kp for the reaction is :
Answer» $C O F_{2} (g)$ passed over catalyst at $1000^{\circ} C$ comes to equilibrium: $2 C O F_{2} (g) ⇌ C O_{2} (g) + C F_{4} (g)$ Analysis of the equilibrium mixture (after quick cooling to freeze the equilibrium) show that $500 ml$ of the equilibrium mixture (STP) contain $300 ml$ (STP) of $(C O F_{2} + C O_{2})$ taking the total pressure to be $10$ atm. The value of $K_{p}$ for the reaction is :

Discussion

46.	name the metal of first row trasition series that has zero spin only magnetic moment in its +2 oxidation state
Answer» name the metal of first row trasition series that has zero spin only magnetic moment in its +2 oxidation state

Discussion

47.	20 g of Ba(OH)2 is dissolved in 500 mL of water. 25 mL of this is used to titrate a H2SO4 solution. On titration it gave a titre value of 35 mL. Calculate the molarity of H2SO4 solution. (Molar mass of Ba = 137 g/mol)
Answer» 20 g of $B a (O H)_{2}$ is dissolved in 500 mL of water. 25 mL of this is used to titrate a $H_{2} S O_{4}$ solution. On titration it gave a titre value of 35 mL. Calculate the molarity of $H_{2} S O_{4}$ solution. (Molar mass of Ba = 137 g/mol)

Discussion

48.	800000 how many significant figure.....
Answer» 800000 how many significant figure.....

Discussion

49.	Select the correct order of bond angle of the following species.ClO−3,BrO−3,IO−3
Answer» Select the correct order of bond angle of the following species. $C l O_{3}^{-}, B r O_{3}^{-}, I O_{3}^{-}$

Discussion

50.	The enthalpies for the following reactions at 25°C are given. 12 H2(g) + 12 O2(g)→OH(g); △H = 10.06 K cal H2(g)→2H(g); △H = 104.18 K cal O2(g)→2O(g); △H = 118.32 K cal Calculate the OH bond energy in the O - H group
Answer» The enthalpies for the following reactions at 25°C are given. $\frac{1}{2} H_{2} (g) + \frac{1}{2} O_{2} (g) \to O H (g); △ H = 10.06 K c a l$ $H_{2} (g) \to 2 H (g); △ H = 104.18 K c a l$ $O_{2} (g) \to 2 O (g); △ H = 118.32 K c a l$ Calculate the OH bond energy in the O - H group

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Calculate the standard cell potentials of galvanic cell in which the following reactions take place : (i) 2Cr(s)+3Cd2+(aq)→2Cr3+(aq)+3Cd (ii) Fe2+(aq)+Ag+(aq)→Fe3+(aq)+Ag(s) Calculate the ΔrG∘ and equilibrium constant for the reactions

The RMS velocity of hydrogen is √7 times the RMS velocity of nitrogen. If T is the temperature of the gas, then:

A chloride of vanadium has a magnetic moment of 1.732 BM. It's formula could be:

Which of the following compounds has the most negative heat of hydrogenation?

Consider the following reaction and identify (B).

Which of the following polymer can be formed by using the following monomer unit? (a) Nylon-6, 6 (b) Nylon-2-nylon-6 (c) Melamine polymer (d) Nylon - 6

Distinction between primary, secondary and tertiary alcohol is done by [MP PMT/PET 1988; RPMT 2000]

A buffer solution of pH=4 is to be prepared, using CH3COOH and CH3COONa. The concentration of acetic acid and sodium acetate are 110 M and x M. How much will the pH be if 1.5 L of H2O is added to above buffer ? Ka(CH3COOH)=4.7447

A certain quantity of ideal gas takes up 56 J of heat in the process AB and 360 J in the process AC. Then the number of degrees of freedom of the gas are

An alloy of Cu, Ag and Au is found to have copper in a CCP lattice. If the silver atoms occupy the edge centre and gold is present at the body centre, the alloy has a formula:

What is the equivalent mass of H2SO4 for the given reaction? (Molar mass is given as ‘M’) H2SO4+NaOH→NaHSO4+H2O

For a common emitter configuration, if α and have β their usual meanings, the incorrect relationship between α and β is:

0.0833 mol of a carbohydrate of empirical formula CH2O contain 1 g of hydrogen. The molecular formula of the carbohydrate is:

Which among the given molecules can exhibit tautomerism?

Define the following terms with a suitable example in each : (i) Broad-spectrum antibiotics (ii) Disinfectants (iii) Cationic detergents

An open vessel at 27oC is heated until 38th of the air in it has been expelled. Assuming that the volume remains constant, calculate the temperature to which the vessel was heated.

For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, △U and W correspond to

The acid having O - O linkage is

The magnitude of angular momentum, orbit radius and frequency of revolution of electron in hydrogen atom corresponding to quantum number n are L, r and f respectively. Then according to Bohr's theory of hydrogen atom,

What is the value of Electron gain enthalpy of Na+, if IE1 of Na=5.1 eV .

An ion has electronic configuration [Kr]4d4 placed in group 6 in the modern periodic table. The ion is:

Find the number of waves made by a Bohr electron in one complete revolution in the 3rd orbit.

What are biodegradable and non-biodegradable detergents? Give one example of each.

Two electrons occupying the same orbital may be distinguished by:

Find the total number of stereoisomers of bisbutane-2,3-diammineplatinum(II) sulfate.

During nuclear explosion one of the products is 90Sr with half-life of 28.1 yr. If 1 μg of 90Sr was absorbed in the bones of a newly born baby instead of calcium, how much of it will remain after 10 yr and 60 yr if it is not lost metabolically?

Solubility products of Al(OH)3 and Zn(OH)2 are 2.7×10−23 and 3.2×10−14 respectively. If to a solution of 0.1 M each of Al3+ and Zn2+ions,NH4OH is added in increasing amounts which of the following will be precipitated first ?

Lithium borohydride crystallizes in an orthorhombic system with 4 molecules per unit cell. The unit cell dimensions are a = 6.8 ∘A , b = 4.4 ∘A and c = 7.2 ∘A. If the molar mass is 21.76 g, calculate density of the crystal.

The vapour density of PCl5 is 104.25 but when heated to 230oC, its vapour density is reduced to 62. The decomposition reaction of PCl5 on heating is PCl5(g)⇌PCl3(g)+Cl2(g) Calculate the degree of dissociation of PCl5 at this temperature :

Which of the following trihalides is not hydrolysed by water?

Calculate ΔH at 358 K for the reaction, Fe2O3(s)+3H2(g) → 2Fe(s)+3H2O(l) Given that , ΔH298=−33.29 kJ mol−1 and CP for Fe2O3(s), Fe(s), H2O(l) and H2(g) are 103.8, 25.1, 75.3, and 28.8 J/K mol.

Which of these isoelectronic species has the smallest radius?

Name the macro-molecules that are chosen as drug targets.

Sulphur reacts with chlorine in 1 : 2 ratio and forms X. Hydrolysis of X gives a sulphur compound Y. What is the hybridization state of central atom in the anion of Y?

Which hydrocarbons will have the least dipole moment?

Why should we remove an electron from a gaseous atom?

Which of the following will undergo a faster SN2?.

The heat of neutrailisation of NaOH and HCL is 57.3 KJ/mole.What will be the amount of heat evolved when 2mole of NaOH and HCL are reacted

In the given reaction 5H2O2+xClO2+2OH−→yCl−+zO2+6H2O The values of x, y and z are:

Explain the uses of carboxylic acid.

Solutions of0.1 N NH4OH and 0.1N NH4Cl has pH 9.25. Then PKb of NH4OH is

Which of the following diagrams is of impurity defect?

name the metal of first row trasition series that has zero spin only magnetic moment in its +2 oxidation state

20 g of Ba(OH)2 is dissolved in 500 mL of water. 25 mL of this is used to titrate a H2SO4 solution. On titration it gave a titre value of 35 mL. Calculate the molarity of H2SO4 solution. (Molar mass of Ba = 137 g/mol)

800000 how many significant figure.....

Select the correct order of bond angle of the following species.ClO−3,BrO−3,IO−3

The enthalpies for the following reactions at 25°C are given. 12 H2(g) + 12 O2(g)→OH(g); △H = 10.06 K cal H2(g)→2H(g); △H = 104.18 K cal O2(g)→2O(g); △H = 118.32 K cal Calculate the OH bond energy in the O - H group