46295 + Interview Questions in Chemistry

1.	y=n²eⁿ Find dy/dn
Answer» y=n²eⁿ Find dy/dn

Discussion

2.	m‑chlorobenzaldehyde on reaction with conc. KOH at room temperature gives:
Answer» m‑chlorobenzaldehyde on reaction with conc. KOH at room temperature gives:

Discussion

3.	what is centripetal accerlatio
Answer» what is centripetal accerlatio

Discussion

4.	What is the difference between usingNabh4 as the reagentAnd using nabh4 with methanol or any other alcohol
Answer» What is the difference between using Nabh4 as the reagent And using nabh4 with methanol or any other alcohol

Discussion

5.	RMS speed of molecules of gas A at temperature T1 is v and that of molecules of gas B at temperature T2 is 2v. Then which of the following is necessarily true?Options: 1)T2 = 2T1 2)T2 < T1 3)T2 > T1 4)None of these
Answer» RMS speed of molecules of gas A at temperature T1 is v and that of molecules of gas B at temperature T2 is 2v. Then which of the following is necessarily true? Options: 1)T2 = 2T1 2)T2 < T1 3)T2 > T1 4)None of these

Discussion

6.	17. IE 1 and IE2 of Mg are 740, 1540kj/mol. calculate percentage of Mg+ and Mg2+, if 1g of Mg absorbs 50.0 KJ of energy?
Answer» 17. IE 1 and IE2 of Mg are 740, 1540kj/mol. calculate percentage of Mg+ and Mg2+, if 1g of Mg absorbs 50.0 KJ of energy?

Discussion

7.	Is average atomic mass and atomic mass and relative atomic mass the same
Answer» Is average atomic mass and atomic mass and relative atomic mass the same

Discussion

8.	In 1 g of solid, there are 5 × 1021 atoms. Ifone electron is removed from every one of0.01% of atoms of the solid the chargegained by the solid is:(A) 0.08 C1.(B) +0.8 C(D)-0.8 C(C)-0.08 C
Answer» In 1 g of solid, there are 5 × 1021 atoms. Ifone electron is removed from every one of0.01% of atoms of the solid the chargegained by the solid is:(A) 0.08 C1.(B) +0.8 C(D)-0.8 C(C)-0.08 C

Discussion

9.	A catalyst is a substance [IIT 1983]
Answer» A catalyst is a substance [IIT 1983]

Discussion

10.	On the basis of information available from the reaction:43Al+O2→23Al2O3ΔG=−827 KJ/mol of O2. The minimum e.m.f. required to carry outelectrolysis of Al2O3 is
Answer» On the basis of information available from the reaction: $\frac{4}{3} A l + O_{2} \to \frac{2}{3} A l_{2} O_{3} Δ G = - 827 K J / m o l$ of $O_{2}$ . The minimum e.m.f. required to carry out electrolysis of $A l_{2} O_{3}$ is

Discussion

11.	Are gram atomic mass and gram molecular mass equal to the molar mass.
Answer» Are gram atomic mass and gram molecular mass equal to the molar mass.

Discussion

12.	An excited state of H atom emits a photon of wavelength λ and returns in the ground state, the principal quantum number of excited state is given by:
Answer» An excited state of $H$ atom emits a photon of wavelength $λ$ and returns in the ground state, the principal quantum number of excited state is given by:

Discussion

13.	5. Mole fraction of benzene in the vapours over a solution of benzene and toluene is 0.4. If the original vapour pressure of benzene is 150 mm Hg and toluene is 50 mm Hg, the mole fraction of benzene in the solution is? (Step by step) A)0.4 B)0.75 C)0.25 D)0.18
Answer» 5. Mole fraction of benzene in the vapours over a solution of benzene and toluene is 0.4. If the original vapour pressure of benzene is 150 mm Hg and toluene is 50 mm Hg, the mole fraction of benzene in the solution is? (Step by step) A)0.4 B)0.75 C)0.25 D)0.18

Discussion

14.	99.The potential of a hydrogen electrode at ph=1 is
Answer» 99.The potential of a hydrogen electrode at ph=1 is

Discussion

15.	Writethe isomers of the compound having formula C4H9Br.
Answer» Write the isomers of the compound having formula C₄H₉Br.

Discussion

16.	Chlorine is used as disinfectant in a municipal water treatment plant. It acheives 60% percent of disinfection efficiency measured in terms of killing the indicator microorganisms.(E-Coli) in 4 minutes. The minimum time required to acheive 99.9% disinfection efficiency would be____hrs0.5
Answer» Chlorine is used as disinfectant in a municipal water treatment plant. It acheives 60% percent of disinfection efficiency measured in terms of killing the indicator microorganisms.(E-Coli) in 4 minutes. The minimum time required to acheive 99.9% disinfection efficiency would be____hrs 0.5

Discussion

17.	IfB–Cl bond has a dipole moment, explain why BCl3molecule has zero dipole moment.
Answer» If B–Cl bond has a dipole moment, explain why BCl₃ molecule has zero dipole moment.

Discussion

18.	A compound whose molecule is superimposable on its mirror image despite containing chiral carbon atoms is called:
Answer» A compound whose molecule is superimposable on its mirror image despite containing chiral carbon atoms is called:

Discussion

19.	23.The no. of faraday required to deposit 1g equivelent of Cu from a solution of CuCl2 is
Answer» 23.The no. of faraday required to deposit 1g equivelent of Cu from a solution of CuCl2 is

Discussion

20.	In the following reaction CH3CH2OHAnhydrous CrO3−−−−−−−−−−→XX is:
Answer» In the following reaction $C H_{3} C H_{2} O H A n h y d r o u s C r O_{3} - --------- \to X$ X is:

Discussion

21.	Enthalpy of chemisorption is in the order of?
Answer» Enthalpy of chemisorption is in the order of?

Discussion

22.	The element with lowest boiling point among the following is:
Answer» The element with lowest boiling point among the following is:

Discussion

23.	The decomposition of A into product has value of k as 4.5 ×103 s−1 at 10°C and energy ofactivation 60 kJ mol−1. At what temperature would kbe 1.5 × 104 s−1?
Answer» The decomposition of A into product has value of k as 4.5 × 10³ s⁻¹ at 10°C and energy of activation 60 kJ mol⁻¹. At what temperature would k be 1.5 × 10⁴ s⁻¹?

Discussion

24.	A compound is formed by two elements X and Y . Atoms of the element Y (as anions ) make ccp and those of the element X (as cations) occupy all the octahedral voids. Wha is the formula of the compound ?
Answer» A compound is formed by two elements X and Y . Atoms of the element Y (as anions ) make ccp and those of the element X (as cations) occupy all the octahedral voids. Wha is the formula of the compound ?

Discussion

25.	Please help me with all the Formulas that will be used in Mole Concept that we also used in class 9 but not to a great extent. Please help me with all of the formulas of Mole Concept! ASAP😇😇
Answer» Please help me with all the Formulas that will be used in Mole Concept that we also used in class 9 but not to a great extent. Please help me with all of the formulas of Mole Concept! ASAP😇😇

Discussion

26.	which of the following sequence Is wrong for dipole moment? (1) CH2Cl2>CHCl3 (2) chlorobenzene>fluorobenzene (3) H2O2>H2O>HF (4) N2O4>N2O5>N2
Answer» which of the following sequence Is wrong for dipole moment? (1) CH2Cl2>CHCl3 (2) chlorobenzene>fluorobenzene (3) H2O2>H2O>HF (4) N2O4>N2O5>N2

Discussion

27.	Findthe value of x,y, and zfrom the following equation:(i) (ii) (iii)
Answer» Find the value of x, y, and z from the following equation: (i) (ii) (iii)

27.

Findthe value of x,y, and zfrom the following equation:(i) (ii) (iii)

Answer»

Find
the value of x,
y, and z
from the following equation:

(i) (ii)

(iii)

Discussion

28.	Calculate the molality of the solution and mole fraction of solute and solvent in 25%w/w AQ. Solution of KOH.
Answer» Calculate the molality of the solution and mole fraction of solute and solvent in 25%w/w AQ. Solution of KOH.

Discussion

29.	68. Two strings of length l=0.5m each are connected to a block of mass m=2 kg at one end and their ends are attached to the point A and B 0.5 m apart on a vertical pole which rotates with a constant angular velocity w=7rad/s .find the ratio T1/T2 of tension in the upper string (T1) and the lower string(T2).(Use g=9.8m/s2
Answer» 68. Two strings of length l=0.5m each are connected to a block of mass m=2 kg at one end and their ends are attached to the point A and B 0.5 m apart on a vertical pole which rotates with a constant angular velocity w=7rad/s .find the ratio T1/T2 of tension in the upper string (T1) and the lower string(T2).(Use g=9.8m/s2

Discussion

30.	57Co decays to 57Fe by β+ emission. The resulting 57Fe is in its excited state and comes to the ground state by emitting γ−rays. The half-life of β+ is 270 days and that of the γ− emission is 10−8 s. A sample of 57Co gives 5.0×109 gamma rays per second. How much time will elapse before the emission rate of gamma rays drops to 2.5×109 per second?
Answer» $^{57} Co$ decays to $^{57} Fe by β^{+}$ emission. The resulting $^{57} Fe$ is in its excited state and comes to the ground state by emitting $γ - rays$ . The half-life of $β^{+}$ is $270 days$ and that of the $γ -$ emission is $10^{- 8} s$ . A sample of $^{57} Co$ gives $5.0 \times 10^{9}$ gamma rays per second. How much time will elapse before the emission rate of gamma rays drops to $2.5 \times 10^{9}$ per second?

Discussion

31.	The rate of a first order reaction R→Pis 7.5×10−4molL−1s−1 when the concentration of R is 0.5 mol L−1.The rate constant is
Answer» The rate of a first order reaction $R \to P$ is $7.5 \times 10^{- 4} m o l L^{- 1} s^{- 1}$ when the concentration of R is 0.5 mol $L^{- 1}$ . The rate constant is

Discussion

32.	A soft silver-white metal 'A' burns with a golden-yellow flame to give a yellow power 'B,' which on treatment with water gives a clear solution 'C'. The solution placed on Al attacks this metal, liberating a gas 'D' forming a water-soluble compound 'E'. The metal 'A' dissolves in liquid NH3 to form a deep-blue solution which is a good conductor and an excellent reducing agent. Identify 'C':
Answer» A soft silver-white metal 'A' burns with a golden-yellow flame to give a yellow power 'B,' which on treatment with water gives a clear solution 'C'. The solution placed on $A l$ attacks this metal, liberating a gas 'D' forming a water-soluble compound 'E'. The metal 'A' dissolves in liquid $N H_{3}$ to form a deep-blue solution which is a good conductor and an excellent reducing agent. Identify 'C':

Discussion

33.	ntIf the reactants are CH4 + 2O2 and we need to count number of moles of reactants , will it be 1mole of methane+ 2 moles of oxygen = 3 moles of reactantsn ntOr do we have to calculate individually for carbon , oxygen and hydrogen?n
Answer» ntIf the reactants are CH4 + 2O2 and we need to count number of moles of reactants , will it be 1mole of methane+ 2 moles of oxygen = 3 moles of reactantsn ntOr do we have to calculate individually for carbon , oxygen and hydrogen?n

Discussion

34.	Question 46(a) In this crossword puzzle (Fig 3.2), names of 11 elements are hidden Symbols of these are given below. Complete the puzzle1. CI 7. He2. H 8. F 3. Ar 9. Kr4. O 10. Rn5. Xe 11. Ne6. N(b) Identify the total number of inert gases, their names and symbols from this crossword puzzle
Answer» Question 46 (a) In this crossword puzzle (Fig 3.2), names of 11 elements are hidden Symbols of these are given below. Complete the puzzle 1. CI 7. He 2. H 8. F 3. Ar 9. Kr 4. O 10. Rn 5. Xe 11. Ne 6. N (b) Identify the total number of inert gases, their names and symbols from this crossword puzzle

34.

Question 46(a) In this crossword puzzle (Fig 3.2), names of 11 elements are hidden Symbols of these are given below. Complete the puzzle1. CI 7. He2. H 8. F 3. Ar 9. Kr4. O 10. Rn5. Xe 11. Ne6. N(b) Identify the total number of inert gases, their names and symbols from this crossword puzzle

Answer»

Question 46

(a) In this crossword puzzle (Fig 3.2), names of 11 elements are hidden Symbols of these are given below. Complete the puzzle

1. CI 7. He

2. H 8. F

3. Ar 9. Kr

4. O 10. Rn

5. Xe 11. Ne

6. N

(b) Identify the total number of inert gases, their names and symbols from this crossword puzzle

Discussion

35.	The heat of neutralisation of a strong acid and a strong alkali is −57.0 kJ mol−1. The heat released when 0.5 mole of HNO3 solution is mixed with 0.2 mole of KOH is:
Answer» The heat of neutralisation of a strong acid and a strong alkali is $- 57.0 k J m o l^{- 1} .$ The heat released when $0.5 m o l e$ of $H N O_{3}$ solution is mixed with $0.2 m o l e$ of $K O H$ is:

Discussion

36.	The products (A) and (B) are:
Answer» The products (A) and (B) are:

Discussion

37.	Consider (1) Zn(OH)2 (2) Cr(OH)3 (3) Mg(OH)2 (4) Al(OH)3 which hydroxide is precipitated by NH4OH containing NH4Cl- (a) 1,2 (b) 2,4 (c) Only 4 (4) 1,2,3&4
Answer» Consider (1) Zn(OH)2 (2) Cr(OH)3 (3) Mg(OH)2 (4) Al(OH)3 which hydroxide is precipitated by NH4OH containing NH4Cl- (a) 1,2 (b) 2,4 (c) Only 4 (4) 1,2,3&4

Discussion

38.	The body centered cubic cell of chromium has a length of 0.228nm .Calculate the density of chromium (atomic weight:Cr=52.0)
Answer» The body centered cubic cell of chromium has a length of 0.228nm .Calculate the density of chromium (atomic weight:Cr=52.0)

Discussion

39.	One of the reactions that takes place in producing steel from iron ore is the reduction of iron (II) oxide by carbon monoxide to give iron metal and CO2.FeO (s) + CO (g) Fe (s) + CO2 (g); Kp= 0.265 at 1050 K.What are the equilibrium partial pressures of CO and CO2 at 1050 K if the initial partial pressures are: pCO = 1.4 atm and = 0.80 atm?
Answer» One of the reactions that takes place in producing steel from iron ore is the reduction of iron (II) oxide by carbon monoxide to give iron metal and CO₂. FeO (s) + CO (g) Fe (s) + CO₂ (g); K_p= 0.265 at 1050 K. What are the equilibrium partial pressures of CO and CO₂ at 1050 K if the initial partial pressures are: p_CO = 1.4 atm and = 0.80 atm?

39.

One of the reactions that takes place in producing steel from iron ore is the reduction of iron (II) oxide by carbon monoxide to give iron metal and CO2.FeO (s) + CO (g) Fe (s) + CO2 (g); Kp= 0.265 at 1050 K.What are the equilibrium partial pressures of CO and CO2 at 1050 K if the initial partial pressures are: pCO = 1.4 atm and = 0.80 atm?

Answer»

One of the reactions that takes place in producing steel from iron ore is the reduction of iron (II) oxide by carbon monoxide to give iron metal and CO₂.

FeO (s) + CO (g) Fe (s) + CO₂ (g); K_p= 0.265 at 1050 K.

What are the equilibrium partial pressures of CO and CO₂ at 1050 K if the initial partial pressures are: p_CO = 1.4 atm and = 0.80 atm?

Discussion

40.	In oxidation of alkenes with KMnO4 hot and concentrated we get carboxylic acids why with cold KMnO4 we get 1,2 diolIn oxidation of alkynes with KMnO4 neutral and cold we get Alpha diketone while with warm or basic we get Carboxylic acidsAre the above two statements correct
Answer» In oxidation of alkenes with KMnO4 hot and concentrated we get carboxylic acids why with cold KMnO4 we get 1,2 diol In oxidation of alkynes with KMnO4 neutral and cold we get Alpha diketone while with warm or basic we get Carboxylic acids Are the above two statements correct

Discussion

41.	50. If 60% of a first order reaction was completed in 60 minutes,then 50% of the same reaction would be completed in (1)45.3 min (2)62.2 min (3)52.1 min (4)60 min
Answer» 50. If 60% of a first order reaction was completed in 60 minutes,then 50% of the same reaction would be completed in (1)45.3 min (2)62.2 min (3)52.1 min (4)60 min

Discussion

42.	For the equilibrium SrCl2. 6H2O(s) ⇋ SrCl2.2H2O(s) + 4H2O(g) the equilibrium constant Kp = 16 × 10−12atm4 at 1∘C. If one litre of air saturated with water vapour at 1∘C is exposed to a large quantity of SrCl22H2O(s), what weight of water vapour will be absorbed ? Saturated vapour pressure of water at 1∘C = 7.6 torr.
Answer» For the equilibrium $S r C l_{2}$ . 6 $H_{2} O$ (s) $⇋$ $S r C l_{2}$ . $2 H_{2} O$ (s) + 4 $H_{2} O$ (g) the equilibrium constant $K_{p}$ = 16 $\times$ $10^{- 12}$ atm⁴ at $1^{\circ}$ C. If one litre of air saturated with water vapour at $1^{\circ}$ C is exposed to a large quantity of $S r C l_{2}$ $2 H_{2} O$ (s), what weight of water vapour will be absorbed ? Saturated vapour pressure of water at $1^{\circ}$ C = 7.6 torr.

42.

For the equilibrium SrCl2. 6H2O(s) ⇋ SrCl2.2H2O(s) + 4H2O(g) the equilibrium constant Kp = 16 × 10−12atm4 at 1∘C. If one litre of air saturated with water vapour at 1∘C is exposed to a large quantity of SrCl22H2O(s), what weight of water vapour will be absorbed ? Saturated vapour pressure of water at 1∘C = 7.6 torr.

Answer»

For the equilibrium $S r C l_{2}$ . 6 $H_{2} O$ (s) $⇋$ $S r C l_{2}$ . $2 H_{2} O$ (s) + 4 $H_{2} O$ (g)

the equilibrium constant $K_{p}$ = 16 $\times$ $10^{- 12}$ atm⁴ at $1^{\circ}$ C. If one litre of air saturated with water vapour at $1^{\circ}$ C is exposed to a large quantity of $S r C l_{2}$ $2 H_{2} O$ (s), what weight of water vapour will be absorbed ? Saturated vapour pressure of water at $1^{\circ}$ C = 7.6 torr.

Discussion

43.	Comparison of Aliphatic amines on the basis of non polar solvent ?
Answer» Comparison of Aliphatic amines on the basis of non polar solvent ?

Discussion

44.	How to calculate the hybridization state in the given formula of compund. Ex:-The hybridization of BeCl2 in solid state and above 1200K is respectively(1) sp3, sp3(2) sp3, sp2(3) sp2, sp2(4) sp3, sp
Answer» How to calculate the hybridization state in the given formula of compund. Ex:- The hybridization of BeCl2 in solid state and above 1200K is respectively (1) sp3, sp3 (2) sp3, sp2 (3) sp2, sp2 (4) sp3, sp

Discussion

45.	Correct order of boiling point is:[0.77 Mark]
Answer» Correct order of boiling point is: [0.77 Mark]

Discussion

46.	In the following sequence of reactions, ZPCl5−−−→XAlc. KOH−−−−−−→Y(i) conc. H2SO4−−−−−−−−−→(ii) H2O, boilZ Z is:
Answer» In the following sequence of reactions, $Z P C l_{5} - -- \to X Alc. KOH - ----- \to Y (i) conc. H_{2} S O_{4} - -------- \to (i i) H_{2} O, boil Z$ $Z$ is:

Discussion

47.	97.What is thermodynamics process
Answer» 97.What is thermodynamics process

Discussion

48.	Ferrous oxide has a cubic structure and each edge of the unit cell is 5.0 Å. Assuming density of the oxide as , then the number of ions present in each unit cell will be [MP PET 2000]
Answer» Ferrous oxide has a cubic structure and each edge of the unit cell is 5.0 Å. Assuming density of the oxide as , then the number of ions present in each unit cell will be [MP PET 2000]

48.

Ferrous oxide has a cubic structure and each edge of the unit cell is 5.0 Å. Assuming density of the oxide as , then the number of ions present in each unit cell will be [MP PET 2000]

Answer»

Ferrous oxide has a cubic structure and each edge of the unit cell is 5.0 Å.

Assuming density of the oxide as , then the number of

ions present in each unit cell will be

[MP PET 2000]

Discussion

49.	Whatis the relationship between normality and mass percent
Answer» Whatis the relationship between normality and mass percent

Discussion

50.	In extraction of copper ,the flux used is:
Answer» In extraction of copper ,the flux used is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

y=n²eⁿ Find dy/dn

m‑chlorobenzaldehyde on reaction with conc. KOH at room temperature gives:

what is centripetal accerlatio

What is the difference between usingNabh4 as the reagentAnd using nabh4 with methanol or any other alcohol

RMS speed of molecules of gas A at temperature T1 is v and that of molecules of gas B at temperature T2 is 2v. Then which of the following is necessarily true?Options: 1)T2 = 2T1 2)T2 < T1 3)T2 > T1 4)None of these

17. IE 1 and IE2 of Mg are 740, 1540kj/mol. calculate percentage of Mg+ and Mg2+, if 1g of Mg absorbs 50.0 KJ of energy?

Is average atomic mass and atomic mass and relative atomic mass the same

In 1 g of solid, there are 5 × 1021 atoms. Ifone electron is removed from every one of0.01% of atoms of the solid the chargegained by the solid is:(A) 0.08 C1.(B) +0.8 C(D)-0.8 C(C)-0.08 C

A catalyst is a substance [IIT 1983]

On the basis of information available from the reaction:43Al+O2→23Al2O3ΔG=−827 KJ/mol of O2. The minimum e.m.f. required to carry outelectrolysis of Al2O3 is

Are gram atomic mass and gram molecular mass equal to the molar mass.

An excited state of H atom emits a photon of wavelength λ and returns in the ground state, the principal quantum number of excited state is given by:

5. Mole fraction of benzene in the vapours over a solution of benzene and toluene is 0.4. If the original vapour pressure of benzene is 150 mm Hg and toluene is 50 mm Hg, the mole fraction of benzene in the solution is? (Step by step) A)0.4 B)0.75 C)0.25 D)0.18

99.The potential of a hydrogen electrode at ph=1 is

Writethe isomers of the compound having formula C4H9Br.

Chlorine is used as disinfectant in a municipal water treatment plant. It acheives 60% percent of disinfection efficiency measured in terms of killing the indicator microorganisms.(E-Coli) in 4 minutes. The minimum time required to acheive 99.9% disinfection efficiency would be____hrs0.5

IfB–Cl bond has a dipole moment, explain why BCl3molecule has zero dipole moment.

A compound whose molecule is superimposable on its mirror image despite containing chiral carbon atoms is called:

23.The no. of faraday required to deposit 1g equivelent of Cu from a solution of CuCl2 is

In the following reaction CH3CH2OHAnhydrous CrO3−−−−−−−−−−→XX is:

Enthalpy of chemisorption is in the order of?

The element with lowest boiling point among the following is:

The decomposition of A into product has value of k as 4.5 ×103 s−1 at 10°C and energy ofactivation 60 kJ mol−1. At what temperature would kbe 1.5 × 104 s−1?

A compound is formed by two elements X and Y . Atoms of the element Y (as anions ) make ccp and those of the element X (as cations) occupy all the octahedral voids. Wha is the formula of the compound ?

Please help me with all the Formulas that will be used in Mole Concept that we also used in class 9 but not to a great extent. Please help me with all of the formulas of Mole Concept! ASAP😇😇

which of the following sequence Is wrong for dipole moment? (1) CH2Cl2>CHCl3 (2) chlorobenzene>fluorobenzene (3) H2O2>H2O>HF (4) N2O4>N2O5>N2

Findthe value of x,y, and zfrom the following equation:(i) (ii) (iii)

Calculate the molality of the solution and mole fraction of solute and solvent in 25%w/w AQ. Solution of KOH.

The rate of a first order reaction R→Pis 7.5×10−4molL−1s−1 when the concentration of R is 0.5 mol L−1.The rate constant is

ntIf the reactants are CH4 + 2O2 and we need to count number of moles of reactants , will it be 1mole of methane+ 2 moles of oxygen = 3 moles of reactantsn ntOr do we have to calculate individually for carbon , oxygen and hydrogen?n

Question 46(a) In this crossword puzzle (Fig 3.2), names of 11 elements are hidden Symbols of these are given below. Complete the puzzle1. CI 7. He2. H 8. F 3. Ar 9. Kr4. O 10. Rn5. Xe 11. Ne6. N(b) Identify the total number of inert gases, their names and symbols from this crossword puzzle

The heat of neutralisation of a strong acid and a strong alkali is −57.0 kJ mol−1. The heat released when 0.5 mole of HNO3 solution is mixed with 0.2 mole of KOH is:

The products (A) and (B) are:

Consider (1) Zn(OH)2 (2) Cr(OH)3 (3) Mg(OH)2 (4) Al(OH)3 which hydroxide is precipitated by NH4OH containing NH4Cl- (a) 1,2 (b) 2,4 (c) Only 4 (4) 1,2,3&4

The body centered cubic cell of chromium has a length of 0.228nm .Calculate the density of chromium (atomic weight:Cr=52.0)

In oxidation of alkenes with KMnO4 hot and concentrated we get carboxylic acids why with cold KMnO4 we get 1,2 diolIn oxidation of alkynes with KMnO4 neutral and cold we get Alpha diketone while with warm or basic we get Carboxylic acidsAre the above two statements correct

50. If 60% of a first order reaction was completed in 60 minutes,then 50% of the same reaction would be completed in (1)45.3 min (2)62.2 min (3)52.1 min (4)60 min

Comparison of Aliphatic amines on the basis of non polar solvent ?

How to calculate the hybridization state in the given formula of compund. Ex:-The hybridization of BeCl2 in solid state and above 1200K is respectively(1) sp3, sp3(2) sp3, sp2(3) sp2, sp2(4) sp3, sp

Correct order of boiling point is:[0.77 Mark]

In the following sequence of reactions, ZPCl5−−−→XAlc. KOH−−−−−−→Y(i) conc. H2SO4−−−−−−−−−→(ii) H2O, boilZ Z is:

97.What is thermodynamics process

Ferrous oxide has a cubic structure and each edge of the unit cell is 5.0 Å. Assuming density of the oxide as , then the number of ions present in each unit cell will be [MP PET 2000]

Whatis the relationship between normality and mass percent

In extraction of copper ,the flux used is: