46295 + Interview Questions in Chemistry Page 56 InterviewSolution

2751.	Lithium borohydride crystallizes in an orthorhombic system with 4 molecules per unit cell. The unit cell dimensions are a = 6.8Å, b = 4.4Å and C = 7.2Å. If the molar mass is 21.76g. Density of crystal is (gm/cm3)
Answer» Lithium borohydride crystallizes in an orthorhombic system with 4 molecules per unit cell. The unit cell dimensions are a = 6.8Å, b = 4.4Å and C = 7.2Å. If the molar mass is 21.76g. Density of crystal is (gm/cm³)

Discussion

2752.	Which among MeX,RCH2X,R2CHX and R3CX is most reactive towards SN2 reaction?
Answer» Which among $M e X, R C H_{2} X, R_{2} C H X and R_{3} C X$ is most reactive towards $S_{N} 2$ reaction?

Discussion

2753.	Number of atoms present in 22g of CO2 is
Answer» Number of atoms present in 22g of CO2 is

Discussion

2754.	12 2electronegativity-ionisation enthalpy-elevtron affinity=0explain
Answer» 12 2electronegativity-ionisation enthalpy-elevtron affinity=0explain

Discussion

2755.	Choose the correct P and Q combination of the following reactions.
Answer» Choose the correct P and Q combination of the following reactions.

Discussion

2756.	The activity of a freshly prepared radioactive sample is 2×1015 disintegration per second. The mean life is 108 s. The mass of an atom of this radio isotope is 10−25 kg. The mass (in gram) of the radioactive sample is
Answer» The activity of a freshly prepared radioactive sample is $2 \times 10^{15}$ disintegration per second. The mean life is $10^{8} s .$ The mass of an atom of this radio isotope is $10^{- 25} k g$ . The mass (in gram) of the radioactive sample is

Discussion

2757.	How hydrogen gas prevent formation of ferric chloride?
Answer» How hydrogen gas prevent formation of ferric chloride?

Discussion

2758.	Assertion:-Tert. butyl alcohol on heating with conc. H2SO4 at 413 K gives 2-methyl propane as the main product and not di-tert. butyl ether. Reason:- All alcohols are readily dehydrated with conc. H2S04.
Answer» Assertion:-Tert. butyl alcohol on heating with conc. H2SO4 at 413 K gives 2-methyl propane as the main product and not di-tert. butyl ether. Reason:- All alcohols are readily dehydrated with conc. H2S04.

Discussion

2759.	6. 2g of NaOH per 250ml of solution is added is to a buffer solution of buffer capacity 0.2.Then the charge in pH is?
Answer» 6. 2g of NaOH per 250ml of solution is added is to a buffer solution of buffer capacity 0.2.Then the charge in pH is?

Discussion

2760.	a 5.25% solution of a subs†an ce is isotonic with 1.5% solution of urea in the same solvent. if the densities ofboth the solutions are assumed to be equal to 1g/cm3 molar mass of the subs†an ce
Answer» a 5.25% solution of a subs†an ce is isotonic with 1.5% solution of urea in the same solvent. if the densities ofboth the solutions are assumed to be equal to 1g/cm3 molar mass of the subs†an ce

Discussion

2761.	When benzladehyde is oxidized to give benzoic acid then the oxidation state of carbon of aldehydic group is changed from
Answer» When benzladehyde is oxidized to give benzoic acid then the oxidation state of carbon of aldehydic group is changed from

Discussion

2762.	26. Sodium carbonate contains 43.4% Na, 11.3% Cand 45.3% O. If the law of constant composition isvalid then weight of Na in 6 g of Na,COa obtainedfrom other source will be3(2) 3.5 g(1) 1.4 g(4) 1.8 g) 2.6 g
Answer» 26. Sodium carbonate contains 43.4% Na, 11.3% Cand 45.3% O. If the law of constant composition isvalid then weight of Na in 6 g of Na,COa obtainedfrom other source will be3(2) 3.5 g(1) 1.4 g(4) 1.8 g) 2.6 g

Discussion

2763.	What is the order of Reducing character of hydrides of halogen?
Answer» What is the order of Reducing character of hydrides of halogen?

Discussion

2764.	†ext { 1) is nucleas force repuisive?
Answer» †ext { 1) is nucleas force repuisive?

Discussion

2765.	25 mL of a solution of barium hydroxide on titration with a 0.1 M solution of HCl gave a titre value of 35 mL. The molarity of the barium hydroxide solution is:
Answer» $25 mL$ of a solution of barium hydroxide on titration with a $0.1 M$ solution of $H C l$ gave a titre value of $35 mL$ . The molarity of the barium hydroxide solution is:

Discussion

2766.	Among the following the most reactive towards alcoholic KOH is :
Answer» Among the following the most reactive towards alcoholic KOH is :

Discussion

2767.	Amongst the elements with following electronic configurations, which one may have the highest ionisation energy? [CBSE AIPMT 2009]
Answer» Amongst the elements with following electronic configurations, which one may have the highest ionisation energy? [CBSE AIPMT 2009]

Discussion

2768.	12.6g of impure Na2CO3 is treated with 500ml of 0.5m HCL for complete reaction .the remaining HCL is back titrated by adding 100ml of 0.5 M NaOH .calculate the percentage purity of Na2CO3
Answer» 12.6g of impure Na2CO3 is treated with 500ml of 0.5m HCL for complete reaction .the remaining HCL is back titrated by adding 100ml of 0.5 M NaOH .calculate the percentage purity of Na2CO3

Discussion

2769.	Why square planar complexes do not show optical activity?
Answer» Why square planar complexes do not show optical activity?

Discussion

2770.	what is soddy-fajan and russel or group displacement law.
Answer» what is soddy-fajan and russel or group displacement law.

Discussion

2771.	In the above reaction Y is:
Answer» In the above reaction Y is:

Discussion

2772.	Let's take a Rubik's cube.We know that a Rubik's cube is made up of 27 identical smaller cubes which make up one large cube as seen in the picture above. Let us assume that the one of the small cubes is missing. What will be the packing fraction in this case?
Answer» Let's take a Rubik's cube. We know that a Rubik's cube is made up of 27 identical smaller cubes which make up one large cube as seen in the picture above. Let us assume that the one of the small cubes is missing. What will be the packing fraction in this case?

2772.

Let's take a Rubik's cube.We know that a Rubik's cube is made up of 27 identical smaller cubes which make up one large cube as seen in the picture above. Let us assume that the one of the small cubes is missing. What will be the packing fraction in this case?

Answer»

Let's take a Rubik's cube.

We know that a Rubik's cube is made up of 27 identical smaller cubes which make up one large cube as seen in the picture above.

Let us assume that the one of the small cubes is missing. What will be the packing fraction in this case?

Discussion

2773.	A carbonyl compound P ( from above given i-iii), which gives positive iodoform test, undergoes reaction woth MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S.Pi. MeMgBr−−−−−−−→ii. H+,H2O H2SO4−−−−→ΔQ i. O3−−−−−−−→ii.Zn−H2OR OH−−−−→ΔSThe structure of Q and R are respectively:
Answer» A carbonyl compound P ( from above given i-iii), which gives positive iodoform test, undergoes reaction woth $M e M g B r$ followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S. $P i . M e M g B r - ------ \to i i . H^{+}, H_{2} O H_{2} S O_{4} - --- \to Δ Q i . O_{3} - ------ \to i i . Z n - H_{2} O R O H^{-} - -- \to Δ S$ The structure of Q and R are respectively:

Discussion

2774.	A+dil.HNO3→B+NO+S+H20BΔ−→C+NH4OHexcess→Deep blue solution;Identify 'B'.
Answer» $A + d i l . H N O_{3} \to B + N O + S + H_{2} 0$ $B Δ - \to C + N H_{4} O H e x c e s s \to Deep blue solution$ ; Identify 'B'.

Discussion

2775.	On treatment of 100 mL of 0.1 M solution of CoCl3.6H2O with excess AgNO3;1.2×1022 ions are precipitated. The complex is:
Answer» On treatment of 100 mL of 0.1 M solution of $C o C l_{3} .6 H_{2} O$ with excess $A g N O_{3}; 1.2 \times 10^{22}$ ions are precipitated. The complex is:

Discussion

2776.	The solubility of BaSO4 in water is 2.42×10−3 g L−1 at 298 K. The value of its solubility product (Ksp) will be:(Given molar mass of BaSO4=233 g mol−1)
Answer» The solubility of $B a S O_{4}$ in water is $2.42 \times 10^{- 3} g L^{- 1}$ at $298 K$ . The value of its solubility product $(K_{s p})$ will be: (Given molar mass of $B a S O_{4} = 233 g m o l^{- 1}$ )

Discussion

2777.	Why Magnesium has least melting amd boiling point among group 2 elements?And why calcium has least density?
Answer» Why Magnesium has least melting amd boiling point among group 2 elements? And why calcium has least density?

Discussion

2778.	Acetyl bromide reacts with excess of CH3MgI followed by treatment with a saturated solution of NH4Cl gives
Answer» Acetyl bromide reacts with excess of $C H_{3} M g I$ followed by treatment with a saturated solution of $N H_{4} C l$ gives

Discussion

2779.	A current passing through a resistance R decreases uniformly to zero in a time interval T and a total charge q passes through the resistance. Find the total heat produced in resistance in this process.
Answer» A current passing through a resistance $R$ decreases uniformly to zero in a time interval $T$ and a total charge $q$ passes through the resistance. Find the total heat produced in resistance in this process.

Discussion

2780.	93. How to convert benzene to para Chloro benzoic acid
Answer» 93. How to convert benzene to para Chloro benzoic acid

Discussion

2781.	Isopropyl alcohol is obtained by reacting which of the following alkenes with water in the presence of acid as catalyst?
Answer» Isopropyl alcohol is obtained by reacting which of the following alkenes with water in the presence of acid as catalyst?

Discussion

2782.	Of the following reactions(i) A ⇌ B ΔD G0 = 250 kJ mol−1(ii) D ⇌ E Δ D G0 = -100 kJ mol−1(iii) F ⇌ G Δ D G0 = -150 kJ mol−1(iv) M ⇌ N Δ D G0 = 150 kJ mol−1the reaction with the largest equilibrium constant is
Answer» Of the following reactions (i) A $⇌$ B $Δ$ D G $^{0}$ = 250 kJ mol $^{- 1}$ (ii) D $⇌$ E $Δ$ D G $^{0}$ = -100 kJ mol $^{- 1}$ (iii) F $⇌$ G $Δ$ D G $^{0}$ = -150 kJ mol $^{- 1}$ (iv) M $⇌$ N $Δ$ D G $^{0}$ = 150 kJ mol $^{- 1}$ the reaction with the largest equilibrium constant is

2782.

Of the following reactions(i) A ⇌ B ΔD G0 = 250 kJ mol−1(ii) D ⇌ E Δ D G0 = -100 kJ mol−1(iii) F ⇌ G Δ D G0 = -150 kJ mol−1(iv) M ⇌ N Δ D G0 = 150 kJ mol−1the reaction with the largest equilibrium constant is

Answer»

Of the following reactions

(i) A $⇌$ B $Δ$ D G $^{0}$ = 250 kJ mol $^{- 1}$

(ii) D $⇌$ E $Δ$ D G $^{0}$ = -100 kJ mol $^{- 1}$

(iii) F $⇌$ G $Δ$ D G $^{0}$ = -150 kJ mol $^{- 1}$

(iv) M $⇌$ N $Δ$ D G $^{0}$ = 150 kJ mol $^{- 1}$

the reaction with the largest equilibrium constant is

Discussion

2783.	what is the no of nodal planes in pi2Pxy sigma1s orbital
Answer» what is the no of nodal planes in pi2Pxy sigma1s orbital

Discussion

2784.	The formula of Blue Vitrol is :
Answer» The formula of Blue Vitrol is :

Discussion

2785.	18.Select the endothermic reaction 1)2h2+o2 gives 2h2o 2)n2+o2 give 2no 3)2naoh+h2so4 gives na2so4+2h2o 4)3 o2+c2h5oh gives 2co2 +3h2o
Answer» 18.Select the endothermic reaction 1)2h2+o2 gives 2h2o 2)n2+o2 give 2no 3)2naoh+h2so4 gives na2so4+2h2o 4)3 o2+c2h5oh gives 2co2 +3h2o

Discussion

2786.	Question 18 Out of the following pairs of electrons, identify the pairs of electrons present in degenerate orbitals. (a) (i) n=3,l=2,ml=−2,ms=−12 (ii) n=3,l=2,ml=−1,ms=−12 (b) (i) n=3,l=1,ml=1,ms=+12 (ii) n=3,l=2,ml=−1,ms=+12 (c) (i) n=4,l=1,ml=1,ms=+12 (ii) n=3,l=2,ml=1,ms=+12 (d) (i) n=3,l=2,ml=+2,ms=−12 (ii) n=3,l=2,ml=+2,ms=+12
Answer» Question 18 Out of the following pairs of electrons, identify the pairs of electrons present in degenerate orbitals. (a) (i) $n = 3, l = 2, m_{l} = - 2, m_{s} = - \frac{1}{2}$ (ii) $n = 3, l = 2, m_{l} = - 1, m_{s} = - \frac{1}{2}$ (b) (i) $n = 3, l = 1, m_{l} = 1, m_{s} = + \frac{1}{2}$ (ii) $n = 3, l = 2, m_{l} = - 1, m_{s} = + \frac{1}{2}$ (c) (i) $n = 4, l = 1, m_{l} = 1, m_{s} = + \frac{1}{2}$ (ii) $n = 3, l = 2, m_{l} = 1, m_{s} = + \frac{1}{2}$ (d) (i) $n = 3, l = 2, m_{l} = + 2, m_{s} = - \frac{1}{2}$ (ii) $n = 3, l = 2, m_{l} = + 2, m_{s} = + \frac{1}{2}$

2786.

Question 18 Out of the following pairs of electrons, identify the pairs of electrons present in degenerate orbitals. (a) (i) n=3,l=2,ml=−2,ms=−12 (ii) n=3,l=2,ml=−1,ms=−12 (b) (i) n=3,l=1,ml=1,ms=+12 (ii) n=3,l=2,ml=−1,ms=+12 (c) (i) n=4,l=1,ml=1,ms=+12 (ii) n=3,l=2,ml=1,ms=+12 (d) (i) n=3,l=2,ml=+2,ms=−12 (ii) n=3,l=2,ml=+2,ms=+12

Answer»

Question 18

Out of the following pairs of electrons, identify the pairs of electrons present in degenerate orbitals.

(a) (i) $n = 3, l = 2, m_{l} = - 2, m_{s} = - \frac{1}{2}$ (ii) $n = 3, l = 2, m_{l} = - 1, m_{s} = - \frac{1}{2}$

(b) (i) $n = 3, l = 1, m_{l} = 1, m_{s} = + \frac{1}{2}$ (ii) $n = 3, l = 2, m_{l} = - 1, m_{s} = + \frac{1}{2}$

(c) (i) $n = 4, l = 1, m_{l} = 1, m_{s} = + \frac{1}{2}$ (ii) $n = 3, l = 2, m_{l} = 1, m_{s} = + \frac{1}{2}$

(d) (i) $n = 3, l = 2, m_{l} = + 2, m_{s} = - \frac{1}{2}$ (ii) $n = 3, l = 2, m_{l} = + 2, m_{s} = + \frac{1}{2}$

Discussion

2787.	If the weight of metal chloride is x gram containing y gram of metal, the equivalent weight of metal willbe
Answer» If the weight of metal chloride is x gram containing y gram of metal, the equivalent weight of metal willbe

Discussion

2788.	In hydrogen atom the kinetic energy of electron in an orbit of radius r is given by
Answer» In hydrogen atom the kinetic energy of electron in an orbit of radius r is given by

Discussion

2789.	Two metallic oxides contain 27.6 % and 30.0 % oxygen respectively. If the formula of the first oxide is M3O4, then that of the second will be
Answer» Two metallic oxides contain $27.6$ % and $30.0$ % oxygen respectively. If the formula of the first oxide is $M_{3} O_{4}$ , then that of the second will be

Discussion

2790.	For the reaction CO(g)+(1/2)O2(g)⇌CO2(g),Kp/Kc is
Answer» For the reaction $C O (g) + (1 / 2) O_{2} (g) ⇌ C O_{2} (g), K_{p} / K_{c}$ is

Discussion

2791.	Calculate the hydrolysis constant (Kh) of the salt containing NO2. Given the Ka for HNO2 = 4.5 × 10−10
Answer» Calculate the hydrolysis constant $(K_{h})$ of the salt containing $N O_{2}$ . Given the $K_{a}$ for $H N O_{2}$ = $4.5 \times 10^{- 10}$

2791.

Calculate the hydrolysis constant (Kh) of the salt containing NO2. Given the Ka for HNO2 = 4.5 × 10−10

Answer»

Calculate the hydrolysis constant $(K_{h})$ of the salt containing $N O_{2}$ . Given the

$K_{a}$ for $H N O_{2}$ = $4.5 \times 10^{- 10}$

Discussion

2792.	15.Value of van't hoff factor for H3PO3 & H3PO4
Answer» 15.Value of van't hoff factor for H3PO3 & H3PO4

Discussion

2793.

The work function (ϕ) of some metals is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metal is:___ Metal Li Na K Mg Cu Ag Fe Pt W ϕ (eV) 2.4 2.3 2.2 3.7 4.8 4.3 4.7 6.3 4.75

Answer» The work function

(ϕ)

of some metals is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metal is:___

Metal	Li	Na	K	Mg	Cu	Ag	Fe	Pt	W
$ϕ$ (eV)	2.4	2.3	2.2	3.7	4.8	4.3	4.7	6.3	4.75

Discussion

2794.	On dissolving 2.0g of metal in sulphuricacid, 4.51g of the metal sulphate was formed. The specific heat of the metal is0.057cal/g. What is themolecular formula of metal sulphate?
Answer» On dissolving 2.0g of metal in sulphuricacid, 4.51g of the metal sulphate was formed. The specific heat of the metal is0.057cal/g. What is themolecular formula of metal sulphate?

Discussion

2795.	A sea water sample contains 8×10−3 g of dissolved oxygen per kilogram. What is the concentration of oxygen in parts per billion?
Answer» A sea water sample contains $8 \times 10^{- 3}$ g of dissolved oxygen per kilogram. What is the concentration of oxygen in parts per billion?

Discussion

2796.	1Q)In 9.8% solution of H2SO4 in water, density is 1.2 g/mL. Find the mass of 1 L solution.2Q)In 9.8% solution of H2SO4 in water, density is 1.2 g/mL. Find mass of solute i.e. H2SO4 in 1 L solution.3QIn 9.8% by mass aqueous H2SO4 solution, density was found 1.2 g/mL. The molarity of solution will be
Answer» 1Q)In 9.8% solution of H2SO4 in water, density is 1.2 g/mL. Find the mass of 1 L solution. 2Q)In 9.8% solution of H2SO4 in water, density is 1.2 g/mL. Find mass of solute i.e. H2SO4 in 1 L solution. 3QIn 9.8% by mass aqueous H2SO4 solution, density was found 1.2 g/mL. The molarity of solution will be

Discussion

2797.	Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 g mL−1. Volume of acid required to make 1 litre of 0.1 M H2SO4 solution is :
Answer» Concentrated aqueous sulphuric acid is $98 %$ $H_{2} S O_{4}$ by mass and has a density of $1.80 g m L^{- 1} .$ Volume of acid required to make $1$ litre of $0.1 M H_{2} S O_{4}$ solution is :

Discussion

2798.	Explain the characteristics of carbon that enable it to form a large number of compounds.
Answer» Explain the characteristics of carbon that enable it to form a large number of compounds.

Discussion

2799.	What is the oxidation number of Mn in KMnO4 and of S in Na2S2O3 ?
Answer» What is the oxidation number of $M n$ in $K M n O_{4}$ and of $S$ in $N a_{2} S_{2} O_{3}$ ?

Discussion

2800.

An aqueous solution of a weak monobasic acid containing 0.1 g in 21.7g of water freezes at 272.813 K. If the value of Kf for water is 1.86 K/m, what is the molecular mass of the monobasic acid?

Answer»

An aqueous solution of a weak monobasic acid containing 0.1 g in 21.7g of water freezes at 272.813 K. If the value of K_f for water is 1.86 K/m, what is the molecular mass of the monobasic acid?

Discussion

Explore topic-wise InterviewSolutions in .

Lithium borohydride crystallizes in an orthorhombic system with 4 molecules per unit cell. The unit cell dimensions are a = 6.8Å, b = 4.4Å and C = 7.2Å. If the molar mass is 21.76g. Density of crystal is (gm/cm3)

Which among MeX,RCH2X,R2CHX and R3CX is most reactive towards SN2 reaction?

Number of atoms present in 22g of CO2 is

12 2electronegativity-ionisation enthalpy-elevtron affinity=0explain

Choose the correct P and Q combination of the following reactions.

The activity of a freshly prepared radioactive sample is 2×1015 disintegration per second. The mean life is 108 s. The mass of an atom of this radio isotope is 10−25 kg. The mass (in gram) of the radioactive sample is

How hydrogen gas prevent formation of ferric chloride?

Assertion:-Tert. butyl alcohol on heating with conc. H2SO4 at 413 K gives 2-methyl propane as the main product and not di-tert. butyl ether. Reason:- All alcohols are readily dehydrated with conc. H2S04.

6. 2g of NaOH per 250ml of solution is added is to a buffer solution of buffer capacity 0.2.Then the charge in pH is?

a 5.25% solution of a subs†an ce is isotonic with 1.5% solution of urea in the same solvent. if the densities ofboth the solutions are assumed to be equal to 1g/cm3 molar mass of the subs†an ce

When benzladehyde is oxidized to give benzoic acid then the oxidation state of carbon of aldehydic group is changed from

26. Sodium carbonate contains 43.4% Na, 11.3% Cand 45.3% O. If the law of constant composition isvalid then weight of Na in 6 g of Na,COa obtainedfrom other source will be3(2) 3.5 g(1) 1.4 g(4) 1.8 g) 2.6 g

What is the order of Reducing character of hydrides of halogen?

†ext { 1) is nucleas force repuisive?

25 mL of a solution of barium hydroxide on titration with a 0.1 M solution of HCl gave a titre value of 35 mL. The molarity of the barium hydroxide solution is:

Among the following the most reactive towards alcoholic KOH is :

Amongst the elements with following electronic configurations, which one may have the highest ionisation energy? [CBSE AIPMT 2009]

12.6g of impure Na2CO3 is treated with 500ml of 0.5m HCL for complete reaction .the remaining HCL is back titrated by adding 100ml of 0.5 M NaOH .calculate the percentage purity of Na2CO3

Why square planar complexes do not show optical activity?

what is soddy-fajan and russel or group displacement law.

In the above reaction Y is:

Let's take a Rubik's cube.We know that a Rubik's cube is made up of 27 identical smaller cubes which make up one large cube as seen in the picture above. Let us assume that the one of the small cubes is missing. What will be the packing fraction in this case?

A+dil.HNO3→B+NO+S+H20BΔ−→C+NH4OHexcess→Deep blue solution;Identify 'B'.

On treatment of 100 mL of 0.1 M solution of CoCl3.6H2O with excess AgNO3;1.2×1022 ions are precipitated. The complex is:

The solubility of BaSO4 in water is 2.42×10−3 g L−1 at 298 K. The value of its solubility product (Ksp) will be:(Given molar mass of BaSO4=233 g mol−1)

Why Magnesium has least melting amd boiling point among group 2 elements?And why calcium has least density?

Acetyl bromide reacts with excess of CH3MgI followed by treatment with a saturated solution of NH4Cl gives

A current passing through a resistance R decreases uniformly to zero in a time interval T and a total charge q passes through the resistance. Find the total heat produced in resistance in this process.

93. How to convert benzene to para Chloro benzoic acid

Isopropyl alcohol is obtained by reacting which of the following alkenes with water in the presence of acid as catalyst?

Of the following reactions(i) A ⇌ B ΔD G0 = 250 kJ mol−1(ii) D ⇌ E Δ D G0 = -100 kJ mol−1(iii) F ⇌ G Δ D G0 = -150 kJ mol−1(iv) M ⇌ N Δ D G0 = 150 kJ mol−1the reaction with the largest equilibrium constant is

what is the no of nodal planes in pi*2Pxy sigma*1s orbital

The formula of Blue Vitrol is :

18.Select the endothermic reaction 1)2h2+o2 gives 2h2o 2)n2+o2 give 2no 3)2naoh+h2so4 gives na2so4+2h2o 4)3 o2+c2h5oh gives 2co2 +3h2o

If the weight of metal chloride is x gram containing y gram of metal, the equivalent weight of metal willbe

In hydrogen atom the kinetic energy of electron in an orbit of radius r is given by

Two metallic oxides contain 27.6 % and 30.0 % oxygen respectively. If the formula of the first oxide is M3O4, then that of the second will be

For the reaction CO(g)+(1/2)O2(g)⇌CO2(g),Kp/Kc is

Calculate the hydrolysis constant (Kh) of the salt containing NO2. Given the Ka for HNO2 = 4.5 × 10−10

15.Value of van't hoff factor for H3PO3 & H3PO4

The work function (ϕ) of some metals is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metal is:___ Metal Li Na K Mg Cu Ag Fe Pt W ϕ (eV) 2.4 2.3 2.2 3.7 4.8 4.3 4.7 6.3 4.75

On dissolving 2.0g of metal in sulphuricacid, 4.51g of the metal sulphate was formed. The specific heat of the metal is0.057cal/g. What is themolecular formula of metal sulphate?

A sea water sample contains 8×10−3 g of dissolved oxygen per kilogram. What is the concentration of oxygen in parts per billion?

1Q)In 9.8% solution of H2SO4 in water, density is 1.2 g/mL. Find the mass of 1 L solution.2Q)In 9.8% solution of H2SO4 in water, density is 1.2 g/mL. Find mass of solute i.e. H2SO4 in 1 L solution.3QIn 9.8% by mass aqueous H2SO4 solution, density was found 1.2 g/mL. The molarity of solution will be

Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 g mL−1. Volume of acid required to make 1 litre of 0.1 M H2SO4 solution is :

Explain the characteristics of carbon that enable it to form a large number of compounds.

What is the oxidation number of Mn in KMnO4 and of S in Na2S2O3 ?

An aqueous solution of a weak monobasic acid containing 0.1 g in 21.7g of water freezes at 272.813 K. If the value of Kf for water is 1.86 K/m, what is the molecular mass of the monobasic acid?

what is the no of nodal planes in pi2Pxy sigma1s orbital