52671 + Interview Questions in Chemistry in Class 11

1.	Heat of neutralisation of CH_3COOH_((aq)) with NaOH_((aq)) is - 55.2kJ. What is heat of ionisation of CH_3COOH ?
Answer» ANSWER :`+2.1KJ MOL^(-1)`

Discussion

2.	Heat of neutralisation of a strong acid is ____ than that of a weak acid.
Answer» SOLUTION :`DeltaH_("ionisation")^(sigma)=+"42.77 KJ MOL"^(-1)`.

Discussion

3.	Heat of neutralisation of a weak acid HA by NaOH is -"12.13 kJ mol"^(-1). Calculate the enthalpy of ionization of HA.
Answer» SOLUTION :`DeltaH_("ionisation")^(SIGMA)=+"42.77 kJ mol"^(-1)`.

Discussion

4.	Heat of neutralisation of a polybasic acid by strong base is -54.8 kcal mol^(-1). What is basicity of the acid?
Answer» SOLUTION :`-54.8= -13.7 X RARR x= 4`

Discussion

5.	Heat of neutralisation for the reaction NaOH + HCl rarr NaCl + H_(2)O " is " -57.1 kJ "mole"^(-1). The heat relased when 0.25 moles of NaOH is treated with 0.25 moles of HCl is
Answer» 22.5 K.J/mole 57.1 K.J/mole 14.3 K.J/mole 28.6 K.J/mole ANSWER :C

Discussion

6.	Heat of Hydration of Na^(+) (size 102 Pm) = - 397J Kj mol^(-1) whereas Ca^(2+) (size 100 Pm) = - 1650 kJ mol^(-1). Explain the difference.
Answer» Solution :`Ca^(2+)` is smaller in size then `Na^(+)` and ALSO it has HIGHER charge therefore, its HYDRATION ENERGY is more than that of `Na^(+)`

Discussion

7.	Heat of formation of water and heats of combustion of ethylene and acetylene are respectively 286, -1410 and -1299 kJ mol^(-1), Calculate the heat of the reaction, C_2H_(2(g)) + H_(2(g)) to C_(2)H_(4(g)).
Answer» ANSWER :`-175 KJ MOL^(-1)`

Discussion

8.	The reaction which shows standard heat of formation of water correctly is
Answer» `-251.9KJ` `241.9KJ` `-241.9KJ` `301.9KJ` ANSWER :C

Discussion

9.	Heat of formation of CO and CO_2 are -26.4, -94.0 kcal/mole respectively. What is the heat of combustion of CO in kcals?
Answer» `+26.4` `120.6` `-67.6` `135.2` ANSWER :C

Discussion

10.	Heat of formation of 2 moles of NH_(3)(g) " is" -90 kJl bond energies of H-H and N-H bonds are 435 kJ and 390 kJ mol^(-1) respectively. The value of the bond energy of N -= N is (1000- (x^(2) + x +25)) kJ/mol What is x ?
Answer» Solution :From the data we can say that heat if formation of `NH_(3)` is -45 kJ So, `(1)/(2) N_(2(G)) + (3)/(2) H_(2(g)) rarr NH_(2(g)), Delta H = - 45kJ` So, `-45 = (3)/(2) (H - H) + (1)/(2) (N -= N) - 3 (N - H)` `(3)/(2) (435) + (1)/(2) (N -= N) - 3(390)` `N -= N = 945` From the given CONDITION `945 = 1000 - (x^(2) + x + 25)` So, `x^(2) - x + 25= 55`, On solving x = 6S

Discussion

11.	Heat of dissociationof aceticacidis 0.30 kcalmol^(-1) . Hence,enthalpy change when 1 molofCa(OH)_(2) is completelyneutralized by aceticacid would be
Answer» `-13.4 kcal` `-27.1 kcal` `-26.8 kcal` `-27.4 kcal` Solution :`Ca(OH)_(2) rarr Ca^(2+) + 2OH^(-) , i.e., 1` MOLE of`Ca(OH)_(2)` gives two moles of `OH^(-)` ions. HENCE, when `Ca(OH)_(2)` is COMPLETELY neutralized,heat produced `= 2 xx 13.7 kcal = 27.4 kcal` 2 moles of `OH^(-)` ions require 2 moles of `H^(+)` ions for complete neutralization. Heat of dissociation of acetic acidto produce 2 moles of`H^(+)` ions `= 2 xx 0.30 kcal = 0.6 kcal`. Hence, net heat produced `=27.4 - 0.6 =26.8 kcal, i.e., DeltaH =- 26.8 kcal`

Discussion

12.	Heat of combustion of methane is ……….. KJ/ mol .
Answer» `-87.78` `+87.78` `-394.55` `+394.55` ANSWER :A

Discussion

13.	Heat of combustion of carbon is -96 k, cals. When some quantity of carbon is burnt in oxygen, 48 k.cals of heat is liberated. What is the volume (in lits) of O_2 at STP reacted with this carbon
Answer» 48 22.4 11.2 1 ANSWER :C

Discussion

14.	Heat of combustion of C_(2)H_(4) is -337 kCal. If 5.6 lit O_(2) is used at STP, in the combustion heat liberated is _____ kCal
Answer» 28.08 14.04 42.06 56.16 ANSWER :A

Discussion

15.	Heat of combustion of benzoic acid (C_6H_5COOH) at constant volume at 25^@C is -3233KJ//"mole". When 0.5g of benzoic acid is burnt in bomb calorimeter, the temperature of calorimeter increased by 0.53^@C. Now in the same bomb calorimeter 1g of C_2H_6 burnt then temperature increased by 2.04^@C. DeltaHfor combustion of C_2H_6is
Answer» `-1530KJ//"MOLE"` `-1536.2KJ//"mole"` `-1522.8KJ//"mole"` `+1536.2KJ//"mole"`. ANSWER :B

Discussion

16.	Heat of combustion of A(s) is -10 k"cal" mol^(-1) and that of B(s) is -15 Kcal mol^(-1). Mixture containing 3 moles A(s) and x moles B(s) on combustion released 105 kcal of heat. What is the value of x?
Answer» SOLUTION :`A+ O_(2) RARR Delta H_(1) = -10` Kcal `B + O_(2) rarr Delta H_(2) = -15` Kcal `3A xx xB = 10^(5)` `rArr 3(10) + x (15) = 10^(5) rARr x = 5`

Discussion

17.	Heats of combustion of benzene, carbon and hydrogen are - 782, -94, -68 kcal mol^(-1) respectively. Calculate heat of formation of benzene.
Answer» Solution :`C_(6)H_((s))+O_(2)(g)to 6CO_(2)(g)+3H_(2)O_((l)),DeltaH_(1)=-782k.cal` `C_((s))+O_(2)(g)to CO_(2)(g),DeltaH_(2)=-94Kcal` `H_(2)(g)+1/2O_(2)(g)to H_(2)O_((l)),DELTAH=-68Kcal ` The required EQUATION is `6C_((s))+3H_(2)(g)to C_(6)H_(6)(l),DeltaH=?` Heat of formation of benzene =`DeltaH=-DeltaH_(1)+6DeltaH_(2)+3DeltaH_(2)=+14Kcal`.

Discussion

18.	Heat of combustion is always
Answer» positive negative ZERO either positive or negative ANSWER :B

Discussion

19.	Heat of combustion is always ………….. .
Answer» POSITIVE Negative Zero Either positive or negative Answer :B

Discussion

20.	Heat of combustion is always ____
Answer» POSITIVE NEGATIVE zero either positive or negative ANSWER :B

Discussion

21.	Heats of atmoisation of ozone and oxygen are 25 units and 30 units respectively. What is the heat of ozonisation of one mole of oxygen is the same units?
Answer» Solution :`O_(3) rarr 30, Delta H_(1) = 25` `O_(2) rarr 20, Delta H_(2) = 30` `O_(2) rarr (2)/(3) O_(3), Delta H` `Delta H = +30 - (2)/(3) xx 25 = (15)/(3) = 5`

Discussion

22.	Heat liberated when 100 ml of 1N NaOH is neutralized by 300 ml of 1N HCl ____
Answer» SOLUTION :BASE =`V_1`= 100 ml `N_1=1N` Acid = `N_2`=300 ml `N_2`=1N Enthalpy of neutralization of 1000 ml =57.3 KJ `therefore` Enthalpy of neutralization of 100 ml =`(57.3 kJ)/1000xx100`= 5.73 kJ

Discussion

23.	Heat liberated in the neutralisation of 500 ml of 1N HCl and 500ml of 1N NH_(4)OH is -1.36 K.Cals. The heat of ionisation of NH_(4)OH is
Answer» `10.98`K.Cals `-12.34` K.Cals `-10.98`K.Cals `12.34` K.Cals ANSWER :A

Discussion

24.	Heat is considered as a path function, but in an endothermic process , the heat absorbed by the system undercertain specific conditions is independent of path. What are those conditions ?
Answer» Solution :Heat BECOME INDEPENDENT of the path , at constant volume and constant pressure. (i) At constant Volume : By I law of THERMODYNAMICS, `DeltaU=Q+w` or `q = DeltaU-W`. Sine `W=-PDeltaV` therefore , `q=DeltaU+PDeltaV` . But as volume remains constant, `DeltaV=0` `:.qv=DeltaU` Since `DeltaU` is a state FUNCTION , therefore qv is also state function. (ii) At constant pressure : `qp=DeltaU+PDeltaV` But `DeltaM=DeltaU+PDeltaV` `DeltaU=DeltaH-PDeltaV` `q_(p)=DeltaH-PcancelDeltaV+PcancelDeltaV` `:'qv=DeltaU` since `DeltaH` is a state function , therefore `q_(p)` is a state function.

Discussion

25.	Heat has randomisin influence on a system and temperature is the measure of average chaotic motion of particles in the system . Write the mathematical relation which relates these three parameters.
Answer» SOLUTION : `DELTAS =( Q"REV")/( T)`

Discussion

26.	Heat has randomising influence on a system and temperature is the measure of average chaotic motion of particles in the system. Write the mathematical relation which relates these three parameters.
Answer» Solution :Heat has randomising influence on a system and TEMPERATURE is the measure of average chaotic motion of particles in the system. The mathematical relation which relates these three PARAMETERS is `Delta S = (q_("rev") )/( T)` Here, `Delta S= ` Change in ENTROPY `q_("rev") =` Heat of reversible REACTION T = Temperature

Discussion

27.	Heat capacity (C_(p)) is an extensive property but specific heat (c) is intensive property. What will be the relation between C_(p) " and " c for 1 mole of water ?
Answer» Solution :For water, molar heat CAPACITY, `C_(P) = 18 xx` SPECIFIC heat, C `C_(P) = 18 xx c` Specific heat `c = 4.18 Jg^(-1) K^(-1)` Heat capacity, `C_(P) = 18 xx 4.18 JK^(-1) MOL^(-1)` `= 753 JK^(-1) mol^(-1)`

Discussion

28.	Molar heat capacity (C_(p)) of water of constant pressure is 75JK^(-1) mol^(-4). The increase in temperature (in K)of 100g of water when I kJof heat is supplied to it is
Answer» `1.8 xx 10^(-3) MOL` `3.6 xx 10 ^(-5)` mol `0.0288 G` `0.288mg ` ANSWER :D

Discussion

29.	The specific heat capacity of ___ is maximum.
Answer» SOLUTION :`(DQ)/(DT)`

Discussion

30.	Heat capacity (C_(p)) in an extensive propertybut specificheat (c )is an intensive property . What will be the relationbetween C_(p)and c for 1 mol of water ?
Answer» Solution :For water, molarheat CAPACITY `(C_(p)) = 18 xx `specific heat `:.C_(p)= 18 xx c` But specificheat of water , `c=4.18 J G^(-1) K^(-1)` `:. `HEATCAPACITY , `C_(p) =18 xx 4.18 JK^(-1) MOL^(-1) = 75.3 JK^(-1) mol^(-1)`

Discussion

31.	Heat capacity (C_p) is an extensive property but specific heat (c) is an intensive property. What will be the relation between C_p and c for 1 mol of water?
Answer» Solution :Molar heat capacity for water, `C_p= 18 XX` SPECIFIC heat, c `C_p= 18 xx` Specific heat `c= 4.18 "J" g^(-1) "K"^(-1)` (for water) Heat capacity, `C_(p) = 18 xx 4.18 "JK"^(-1) "MOL"^(-1)` `= 753 "JK"^(-1) "mol"^(-1)`

Discussion

32.	Temperature of 1 mole of an ideal gas is increased from 300 K to 310 K under isochoric process. Heat supplied to the gas in this process is Q = 25 R, where R = universal gas constant. What amount of work has to be done by the gas if temperature of the gas decreases from 310 K to 300 K adiabatically?
Answer» 16X `6.25X` 32X `12.5X` ANSWER :D

Discussion

33.	Heat balance on earth surface is maintained by circulation of air in
Answer» TROPOSPHERE HYDROSPHERE LITHOSPHERE BIOSPHERE ANSWER :A

Discussion

34.	He_2 cannot exist as stable molecule. Justify this statement on the basis of bond order.
Answer» Solution :The electronic configuration of `He_2` is `sigma_(1s)^2 sigma^*_1s^2` BOND order = `1/2(N_b-N_a)` = 1/2(2-2) = 0, hence cannot EXIST

Discussion

35.	He_(2) does not exist. Explain in terms of LCAO.
Answer» SOLUTION :the COMBINING CAPACITY is ZERO

Discussion

36.	The size of a microscopic particle is 1 micron and its mass is 6 xx 10^(-13)g. If its position may be measured to within 0.1% of its size, the uncertainity in velocity (in cm^(-1)) is approximately
Answer» `(10^(-7))/(4PI)` `(10^(-5))/(4pi)` `10^(-5)` `10^(-8)` Solution :`Delta X = (0.1)/(100) = 10^(-4) cm , Delta x . M Delta v ge (h)/(4pi)` `Delta V = h/(4pim) xx1/(Deltax) = (10^(-7))/(4pi)`

Discussion

37.	The ratio of the wavelength of the last line of Balmer series and the last line of Lyman series is :
Answer» `2.5 :1` `3.5 :1` `4.5 :1` `5.5 :1` SOLUTION :`bar(upsilon) = R [1/(1^2) -1/(n^2)]` n=2 for `16(ST)` line , n = 3 for `2^(nd)` line n = 4 for `3^(rd)` line , on SOLVING ratio is `2.5:1`

Discussion

38.	he product obtained as a result of a reaction of nitrogen with CaC_2 is ........
Answer» `CA(CN)_3` `CaN_2` `Ca(CN)_2` `Ca_3N_2` Solution :`Ca(CN)_2` `CaC_2 +N_2 overset(300- 350^@ C)to UNDERSET("Calcium cyanide")(Ca(CN)_2)`

Discussion

39.	Order of intemolecular attractive forces
Answer» WATER `LT` ALCOHOL `lt` Ether Ether `lt` Alcohol `lt` Water Alcohol`lt `Water`lt`Ether Ether`lt` Water`lt` Alcohol Answer :B

Discussion

40.	he figure indicates the energy level diagram of an atom and the origin of six spectral lines in emission (e.g. line no. 5 arises from the transition from level B to A). Which of the following spectral lines will also occur in the absorption spectrum ?
Answer» 4,5,6 1,2,3,4,5,6 1,4,6 1,2,3 Solution :SIMILAR TRANSITIONS CN be CAUSED by similar PHOTONS

Discussion

41.	He atom can be excited to 1s^(1) 2p^(1) by lambda=58.44nm. If lowest excited state for He lies 4857cm^(-1) below the above. Calculate the energy for the lower excitation state.
Answer» ANSWER :`3.3xx10^(-18)J`

Discussion

42.	HCOOH reacts with conc. H_(2)SO_(4) to produce
Answer» CO `CO_(2)` `NO` `NO_(2)` SOLUTION :`HCOOH underset("DEHYDRATION")overset("conc."H_(2)SO_(4))RARR CO + H_(2)O`

Discussion

43.	HCOOH reacts with conc. H_(2)SO_(4) to give :
Answer» `CO_(2)` `CO` OXALIC acid acetic acid Solution :See FORMIC acid

Discussion

44.	HCN_((aq))+NaOH_((aq))to NaCN_((aq)) + H_(2)O_((1)), Delta H=-12.13 KJ Calculate heat of ionisation of HCN .
Answer» Solution :`H_((aq))^(+)+OH_((aq))^(-) to H_(2)O_((1)),DeltaH=-57.3KJ` ……(1) `HCN_((aq))+OH_((aq))^(-)to H_(2)O_((1))`,…….(2) EQUATION (2) -equation (1) GIVES, `HCN_((aq))to H_((aq))^(-) + CN_((aq))^(-),Delta H=+45.17KJ` HeatOf ionisation of `HCN=+45.17KJmol^(-1)`.

Discussion

45.	HCN_((aq)) + NaOH_((aq)) to NaCN_((aq)) + H_2O_((l)) , DetlaH = -12.13 kJ. Calculate heat of ionisation of HCN.
Answer» SOLUTION :`H_((aq))^(+) + OH_((aq))^(-) to H_2O_((l)) , Delta H = -57.3 KJ` ……(1) `HCN_((aq)) + OH_((aq))^(-) to H_2O_((l)) + CN_((aq))^(-)`, `DELTAH = -12.13 kJ`.....(2) Equation (2) – equation (1) gives , `HCN_((aq0) to H_((aq))^(-) + CN_((aq))^(-) , DeltaH = +45.17 kJ` Heat of ionisation of `HCN = +45.17 kJ mol^(-1)`.

Discussion

46.	HCN _((aq)) + NaOH _((aq)) to NaCN _((aq)) + H _(2) O_((l)) , Delta H =-12.13 KJ.Calculate heat of ionisation of HCN.
Answer» SOLUTION :`H _((aq)) ^(+) + OH _((aq) ) ^(-) to H _(2) O _((l)) ,DELTA H =-57.3KJ…..(1)` `HCN_((aq)) + OH _((aq))^(+) to H _(2) O _((l )) + CN _((aq)), ^(-),Delta H =-12.13 KJ…..(2)` Equation (2) - equation (1) GIVES, `HCN _((aq)) to H _((aq)) ^(-) + CN _((aq)) ^(-) , Delta H = + 45.17KJ` Heat of ionisation of `HCN = + 45.17kJ mol ^(-1).`

Discussion

47.	HClO_4 is a poor conductor in
Answer» Water `dil. NH_3` Acetic ACID NAOH SOLUTION Solution :In acetic acid it is a weakelectrolyte

Discussion

48.	HCl is produced in the stomach which can be neutralised by Mg(OH)_2 in the form of milk of magnesia. How much Mg(OH)_2 is required to neutralise one mole of stomach acid?
Answer» 29.16 g 34.3 g 58.33 g 68.66g Solution :`Mg(OH)_2+2HCl to MgCl_2 + 2H_2O` No. of moles of `Mg(OH)_2` REQUIRED for 2 moles of HCL = 1 No. of moles of `Mg(OH)_2` required for 1 mole of HCl = 0.5 MASS of 0.5 mol of `Mg(OH)_2=58.33xx0.5=29.16g`

Discussion

49.	_______HCl is bad conductor of electricity but _______ HCl is good conductor
Answer» Soild, AQUEOUS Aqueous, Solid Anhydrous, Solid Anhydrous, aqueous SOLUTION :HCl IONISES only in squeous solution

Discussion

50.	HCl gas is covalent and NaCl is an ionic compound. This is because
Answer» sodium is highly electropositive HYDROGEN is a non metal HCl isa gas ELECTRONEGATIVITY difference H and CL is less than 2.1 . Solution :A COMPOUND is SAID to be covalent if the electronegativity difference between the combining atoms is less than 2:1.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Heat of neutralisation of CH_3COOH_((aq)) with NaOH_((aq)) is - 55.2kJ. What is heat of ionisation of CH_3COOH ?

Heat of neutralisation of a strong acid is ____ than that of a weak acid.

Heat of neutralisation of a weak acid HA by NaOH is -"12.13 kJ mol"^(-1). Calculate the enthalpy of ionization of HA.

Heat of neutralisation of a polybasic acid by strong base is -54.8 kcal mol^(-1). What is basicity of the acid?

Heat of neutralisation for the reaction NaOH + HCl rarr NaCl + H_(2)O " is " -57.1 kJ "mole"^(-1). The heat relased when 0.25 moles of NaOH is treated with 0.25 moles of HCl is

Heat of Hydration of Na^(+) (size 102 Pm) = - 397J Kj mol^(-1) whereas Ca^(2+) (size 100 Pm) = - 1650 kJ mol^(-1). Explain the difference.

Heat of formation of water and heats of combustion of ethylene and acetylene are respectively 286, -1410 and -1299 kJ mol^(-1), Calculate the heat of the reaction, C_2H_(2(g)) + H_(2(g)) to C_(2)H_(4(g)).

The reaction which shows standard heat of formation of water correctly is

Heat of formation of CO and CO_2 are -26.4, -94.0 kcal/mole respectively. What is the heat of combustion of CO in kcals?

Heat of formation of 2 moles of NH_(3)(g) " is" -90 kJl bond energies of H-H and N-H bonds are 435 kJ and 390 kJ mol^(-1) respectively. The value of the bond energy of N -= N is (1000- (x^(2) + x +25)) kJ/mol What is x ?

Heat of dissociationof aceticacidis 0.30 kcalmol^(-1) . Hence,enthalpy change when 1 molofCa(OH)_(2) is completelyneutralized by aceticacid would be

Heat of combustion of methane is ……….. KJ/ mol .

Heat of combustion of carbon is -96 k, cals. When some quantity of carbon is burnt in oxygen, 48 k.cals of heat is liberated. What is the volume (in lits) of O_2 at STP reacted with this carbon

Heat of combustion of C_(2)H_(4) is -337 kCal. If 5.6 lit O_(2) is used at STP, in the combustion heat liberated is _____ kCal

Heat of combustion of A(s) is -10 k"cal" mol^(-1) and that of B(s) is -15 Kcal mol^(-1). Mixture containing 3 moles A(s) and x moles B(s) on combustion released 105 kcal of heat. What is the value of x?

Heats of combustion of benzene, carbon and hydrogen are - 782, -94, -68 kcal mol^(-1) respectively. Calculate heat of formation of benzene.

Heat of combustion is always

Heat of combustion is always ………….. .

Heat of combustion is always ____

Heats of atmoisation of ozone and oxygen are 25 units and 30 units respectively. What is the heat of ozonisation of one mole of oxygen is the same units?

Heat liberated when 100 ml of 1N NaOH is neutralized by 300 ml of 1N HCl ____

Heat liberated in the neutralisation of 500 ml of 1N HCl and 500ml of 1N NH_(4)OH is -1.36 K.Cals. The heat of ionisation of NH_(4)OH is

Heat is considered as a path function, but in an endothermic process , the heat absorbed by the system undercertain specific conditions is independent of path. What are those conditions ?

Heat has randomisin influence on a system and temperature is the measure of average chaotic motion of particles in the system . Write the mathematical relation which relates these three parameters.

Heat has randomising influence on a system and temperature is the measure of average chaotic motion of particles in the system. Write the mathematical relation which relates these three parameters.

Heat capacity (C_(p)) is an extensive property but specific heat (c) is intensive property. What will be the relation between C_(p) " and " c for 1 mole of water ?

Molar heat capacity (C_(p)) of water of constant pressure is 75JK^(-1) mol^(-4). The increase in temperature (in K)of 100g of water when I kJof heat is supplied to it is

The specific heat capacity of ___ is maximum.

Heat capacity (C_(p)) in an extensive propertybut specificheat (c )is an intensive property . What will be the relationbetween C_(p)and c for 1 mol of water ?

Heat capacity (C_p) is an extensive property but specific heat (c) is an intensive property. What will be the relation between C_p and c for 1 mol of water?

Heat balance on earth surface is maintained by circulation of air in

He_2 cannot exist as stable molecule. Justify this statement on the basis of bond order.

He_(2) does not exist. Explain in terms of LCAO.

The size of a microscopic particle is 1 micron and its mass is 6 xx 10^(-13)g. If its position may be measured to within 0.1% of its size, the uncertainity in velocity (in cm^(-1)) is approximately

The ratio of the wavelength of the last line of Balmer series and the last line of Lyman series is :

he product obtained as a result of a reaction of nitrogen with CaC_2 is ........

Order of intemolecular attractive forces

he figure indicates the energy level diagram of an atom and the origin of six spectral lines in emission (e.g. line no. 5 arises from the transition from level B to A). Which of the following spectral lines will also occur in the absorption spectrum ?

He atom can be excited to 1s^(1) 2p^(1) by lambda=58.44nm. If lowest excited state for He lies 4857cm^(-1) below the above. Calculate the energy for the lower excitation state.

HCOOH reacts with conc. H_(2)SO_(4) to produce

HCOOH reacts with conc. H_(2)SO_(4) to give :

HCN_((aq))+NaOH_((aq))to NaCN_((aq)) + H_(2)O_((1)), Delta H=-12.13 KJ Calculate heat of ionisation of HCN .

HCN_((aq)) + NaOH_((aq)) to NaCN_((aq)) + H_2O_((l)) , DetlaH = -12.13 kJ. Calculate heat of ionisation of HCN.

HCN _((aq)) + NaOH _((aq)) to NaCN _((aq)) + H _(2) O_((l)) , Delta H =-12.13 KJ.Calculate heat of ionisation of HCN.

HClO_4 is a poor conductor in

HCl is produced in the stomach which can be neutralised by Mg(OH)_2 in the form of milk of magnesia. How much Mg(OH)_2 is required to neutralise one mole of stomach acid?

_______HCl is bad conductor of electricity but _______ HCl is good conductor

HCl gas is covalent and NaCl is an ionic compound. This is because

_HCl is bad conductor of electricity but _ HCl is good conductor