Description : Forward reaction will be favoured for the exothermic reaction, represented by CO + H2O ⇌ CO2 + H2, by (A) Low temperature and high pressure (B) Low temperature and low pressure (C) High temperature and high pressure (D) High temperature and low pressure
Last Answer : (A) Low temperature and high pressure
Description : What Mass Of Calcium Carbonate Is Needed For Complete Reaction With The HCl In 2HCl(aq) plus CaCO 3 (s) CaCl 2 (aq) plus H 2 O(l) plus CO 2 (g)?
Last Answer : Need answer
Description : For the equilibrium Cl2(g) + 2NO(g) ⇌ 2NOCl(g) the concentration of NOCl will increase if the equilibrium is disturbed by ………..
Last Answer : For the equilibrium Cl2(g) + 2NO(g) ⇌ 2NOCl(g) the concentration of NOCl will increase if the equilibrium ... NO c. adding NOCl d. removal of Cl2
Description : If in the gaseous phase reaction, N2O4 ⇌ 2NO2 , x is the part of N2O4 which dissociates, then the number of molecules at equilibrium will be (A) (1 + x) (B) (1 - x) (C) (1 + x) 2 (D) (1 - x)
Last Answer : (A) (1 + x)
Description : The effect of increasing pressure on the gaseous equilibrium of the reaction2X + 3Y ⇌ 3X + 2Y indicates that (A) Pressure has no effect (B) Backward reaction is favoured (C) Forward reaction is favoured (D) None of the
Last Answer : (A) Pressure has no effect
Description : In the gaseous phase ammonia formation reaction (N2 + 3H2 ⇌ 2NH3 ), the value of the equilibrium constant depends on the (A) Total pressure of the system (B) Volume of the reactor (C) Temperature (D) Initial concentration of N2 and H2
Last Answer : (C) Temperature
Description : The irreversible reaction, X → Y, is the special case of the reversible reaction, X ⇌ Y, in which the (A) Equilibrium constant is infinite (B) Fractional conversion of 'A' at equilibrium is unity (C) Concentration of 'A' at equilibrium is zero (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : For the reversible reaction A ⇌ 2B, if the equilibrium constant K is 0.05 mole/litre; starting from initially 2 moles of A and zero moles of B, how many moles will be formed at equilibrium? (A) 0.253 (B) 0.338 (C) 0.152 (D) 0.637
Last Answer : (B) 0.338
Description : In which of the following gaseous phase reactions, the equilibrium of the reaction remains unaffected by pressure changes? (A) 2O3 ⇌ 3O2 (B) N2 + O2 ⇌ 2NO (C) 2NO2 ⇌ N2O4 (D) 2SO2 + O2 ⇌ 2SO3
Last Answer : (B) N2 + O2 ⇌ 2NO
Description : On application of pressure to the equilibrium system, ice ⇌ water; which of the following phenomenon will occur? (A) Water will evaporate (B) Equilibrium will not be attained (C) More ice will be formed (D) More water will be formed
Last Answer : (D) More water will be formed
Description : In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 ⇌ 2SO3 ), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to ... some quantity of SO3 during intermediate stage (D) Maintaining low temperature & pressure in the converter
Last Answer : (C) Removing some quantity of SO3 during intermediate stage
Description : In the reaction, H2 +I2 ⇌ 2HI, addition of an inert gas will (A) Increase the partial pressure of H2 (B) Increase the partial pressure of I2 (C) Increase the total pressure and hence shift the equilibrium towards the right (D) Not affect the equilibrium conditions
Last Answer : (D) Not affect the equilibrium conditions Share
Description : For the reversible exothermic reaction, N2 + 3H2 ⇌ 2NH3, increase of pressure would (A) Shift the equilibrium towards right (B) Give higher yield of NH3 (C) Both (B) and (C) (D) Neither (A) nor (B)
Last Answer : (C) Both (B) and (C)
Description : In which of the following reaction equilibrium, the value of equilibrium constant Kp will be more than is Kc? (A) 2HI ⇌ H2 + I2 (B) N2O4 ⇌ 2NO2 (C) 2SO2 + O2 ⇌ 2SO3 (D) None of these
Last Answer : (B) N2O4 ⇌ 2NO2
Description : In case of the decomposition of hydroiodic acid (2HI ⇌ H2 + I2), addition of H2(at equilibrium condition) will (A) Increase the partial pressure of I2 (B) Decrease the partial pressure of HI (C) Diminish the degree of dissociation of HI (D) None of these
Last Answer : (C) Diminish the degree of dissociation of HI
Description : In the reaction; N2 + O2 ⇌ 2NO, increasing the pressure will result in (A) Shifting the equilibrium towards right (B) Shifting the equilibrium towards left (C) No change in equilibrium condition (D) None of these
Last Answer : (C) No change in equilibrium condition
Description : `0.01` M HA (aq.) is `2%` dissociated, `[OH^(-)]` of solution is :
Last Answer : `0.01` M HA (aq.) is `2%` dissociated, `[OH^(-)]` of solution is : A. `2xx10^(-4)` B. `10^(-8)` C. `5xx10^(-11)` D. `2xx10^(-12)`
Description : `Co^(2+)(aq.)+SCN^(-) (aq.) to "Complex"(X)` `Ni^(2+)(aq.) +"Dimethylglyoxime" overset(NH_(4)OH) to "Complex"(Y)` The coordination number of cobalt an
Last Answer : `Co^(2+)(aq.)+SCN^(-) (aq.) to "Complex"(X)` `Ni^(2+)(aq.) +"Dimethylglyoxime" overset(NH_ ... (Y) is diamagnetic D. (X) and (Y) both are diamagnetic.
Last Answer : `Co^(2+)(aq.)+SCN^(-) (aq.) to "Complex"(X)` `Ni^(2+)(aq.) +" ... both tetrahedral C. square planar and tetrahedral D. both square planar.
Last Answer : `Co^(2+)(aq.)+SCN^(-) (aq.) to "Complex"(X)` `Ni^(2+)(aq.) +" ... . tetrathiocyanoato-S-cobaltate(III) and bis(dimethylglyoximato) nickel (II).
Description : Determine the values of equilibrium constant (Kc) and ΔG° for the following reaction : Ni(s) + 2Ag+ (aq) → Ni2+ (aq) + 2Ag(s), E° = 1.05 V (1F = 96500 C mol-1 -Chemistry
Last Answer : According to the formula ΔG° = -nFE° = – 2 × 96500 ×1.05 or ΔG° = -202650 J mol-1 = -202.65 KJ mol-1 Now ΔG° ⇒ -202650 J Mol-1 R = 8.314 J/Mol/K, T = 298 K
Description : An isothermal aqueous phase reversible reaction, P ⇌ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3 .h is given by, r = 0.5CP - 0.125CR. A stream containing only P enters the reactor. The ... (in hours) for 40% conversion of P is (A) 0.80 (B) 1.33 (C) 1.60 (D) 2.67
Last Answer : (C) 1.60
Description : In glucose the orientation of the —H and —OH groups around the carbon atom 5 adjacent to the terminal primary alcohol carbon determines (A) D or L series (B) Dextro or levorotatory (C) α and β anomers (D) Epimers
Last Answer : A
Description : In glucose the orientation of the —H and —OH groups around the carbon atom 5 adjacent to the terminal primary alcohol carbon determines (A) D or L series (B) Dextro or levorotatory (C) and anomers (D) Epimers
Last Answer : (A) D or L series
Description : Identify the type of reaction(s) in the following equations. (i)CH4 + 2O2 CO2 + 2 H2O (ii) Pb(NO3)2 + 2KI ——–>Pbl2 + 2KNOs (iii) CaO + H2O ——–> Ca(OH)2 (iv) CuSO4 + Zn ——–> ZnSO4 + Cu -Chemistry
Last Answer : Answer. (i) Combustion reaction and oxidation reaction. (ii)Double displacement reaction and precipitation reaction. (iii) Combination reaction. (iv) Displacement reaction.
Description : Pick out the exothermic reaction out of the following: (A) C + H2O = CO + H2 (B) CaC2 + H2O = Ca(OH)2 + C2H2 (C) MgCO3 = MgO + CO2 (D) All (A), (B) and (C)
Last Answer : (B) CaC2 + H2O = Ca(OH)2 + C2H2
Description : Which of the following pairs of substances illustrate the law of multiple proportions? [CPMT 1972, 78] (A) CO and CO2 (B) H2O and D2O (C) NaCl and NaBr (D) MgO and Mg(OH)2
Last Answer : (A) CO and CO2
Description : What is Ka for H3BO3(aq) = H+(aq)+H2BO3 -(aq)?
Last Answer : Ka= [H+] [H2BO3-] / [h3BO3] (Apex)
Description : `4M(s)+overset(Ө)(C)N(aq.)+2H_(2)O(aq.)+O_(2)(g)` `" " to 4[M(CN)_(2)]^(Ө)(aq.)+4overset(Ө)(O)H(aq.)
Last Answer : `4M(s)+overset(Ө)(C)N(aq.)+2H_(2)O(aq.)+O_(2)(g)` `" " to 4[M(CN)_(2)]^(Ө)(aq.)+4overset(Ө)(O)H(aq.) A ... 2)` D. `[Ag(CN)_(2)]^(-),[Zn(CN)_(4)]^(-2)`
Description : What is Ka for H 3 PO 4 (aq) rightleftharpoons H^ (aq) H 2 PO 4 (aq) )?
Last Answer : not sure
Description : The absolute enthalpy of neutralization of the reaction, `MgO(s)+2HCl(aq.)+H_(2)O(l)` will be
Last Answer : The absolute enthalpy of neutralization of the reaction, `MgO(s)+2HCl(aq.)+H_(2)O(l)` will be A. `57.33" kj ... )` D. Less than `=57.33" kj mol"^(-1)`
Description : `5H_(2)C_(2)O_(4)(aq)+2MnO_(4)(aq)+6H^(+)(aq) to 2Mn^(2+)(aq)+10CO_(2)(g)+8H_(2)O(l)` Oxalic acid, `H_(2)C_(2)O_(2)` , reacts with permanganate ion ac
Last Answer : `5H_(2)C_(2)O_(4)(aq)+2MnO_(4)(aq)+6H^(+)(aq) to 2Mn^(2+)(aq)+10CO_(2)(g)+8H_(2)O(l)` Oxalic acid, `H_ ... A. 13.5 mL B. 18.5 mL C. 33.8 mL D. 84.4 mL
Description : In the reaction 2Li(s)+2H2O(l) âž 2LiOH(aq)+H2(g), which compound is in the gaseous state?
Last Answer : H2
Description : Sodium reacts with water to form sodium hydroxide and hydrogen gas. The balanced equation which represents the above reaction is (a) Na(s) + 2H20(l) → 2NaOH(aq) + 2H2(g) (b) 2Na(s) + 2H2O(l) → 2NaOH(aq) +H2(g) (c) 2Na(s) + 2H20(l) → NaOH(aq) + 2H2(g) (d) 2Na(s) + H20(l) - 2NaOH(aq) + 2H2(g)
Last Answer : Answer: (b)
Description : When volume of the equilibrium reaction C(s) + H2O(g) ⇌ CO(g) + H2(g) is increased at constant temperature the equilibrium will :
Last Answer : When volume of the equilibrium reaction C(s) + H2O(g) ⇌ CO(g) + H2(g) is increased at constant ... left c. be unaltered d. can not be predicted
Description : For the gaseous phase chemical reaction, C2H4(g) + H2O(g) ↔ C2H5OH(g), the equilibrium conversion does not depend on the (A) Steam to ethylene ratio (B) Temperature (C) Pressure (D) None of these
Last Answer : (D) None of these
Description : In the reaction of ethylene with H2O in the presence of sulfuric acid, which one adds across the double bond first? (a) H+ (b) H. (c) HO– (d) sulfate ion
Last Answer : H+
Description : Identify the substances that are oxidised and the substances which are reduced in the following reactions. (i) 4Na(s) + O2(g) → 2Na2O(s) (ii) CuO (s) + H2(g) → Cu (s) + H2O(l) -Chemistry-10
Last Answer : (i) Substances oxidised is Na as it gains oxygen and oxygen is reduced. (ii) Substances reduced is Cu as hydrogen is oxidised as it gains oxygen.
Description : Which of the following expression is not applicable on the hydrolysis equilibrium : `CN^(-)H_(2)OrArrHCN+OH^(-)`
Last Answer : Which of the following expression is not applicable on the hydrolysis equilibrium : `CN^(-)H_(2)OrArrHCN+OH^(-)` A. ... H+] =sqrt((K_(w).K_(a))/(C))`
Description : The enthalpy changes at 298 K in successive breaking of `O-H` bonds of water, are `H_(2)O(g) rarr H(g)+OH(g),DeltaH=498kJ mol^(-1)` `OH(g) rarr H(g)+O
Last Answer : The enthalpy changes at 298 K in successive breaking of `O-H` bonds of water, are `H_(2)O(g) rarr H(g)+OH(g), ... KJ mol"^(-1)` D. `463 "KJ mol"^(-1)`
Description : If water is formed from `H^(+)` ions and `OH^(-)` the heat of formation of water is :
Last Answer : If water is formed from `H^(+)` ions and `OH^(-)` the heat of formation of water is : A. `-13.7` ... . 13.7 Kcal C. `-63.4` Kcal D. More data required
Description : If `H^(+)+OH^(-)rarrH_(2)O+13.7Kcal` , the heat of neutralisation for complete neutralisation of 1 mole of `H_(2)SO_(4)` by base will be
Last Answer : If `H^(+)+OH^(-)rarrH_(2)O+13.7Kcal` , the heat of neutralisation for complete neutralisation of 1 mole of ... . 27.4 Kcal C. 6.85 Kcal D. 3.425 Kcal
Description : Correct options for the given below reaction: `Ph-OH overset((i) CHCl_(3)+OH^(-))underset((ii) H^(+)) to` Products
Last Answer : Correct options for the given below reaction: `Ph-OH overset((i) CHCl_(3)+OH^(-))underset((ii) H^(+)) to` Products A. B. C. D.
Description : Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history of stereochemistry. Two naturally occuring forms of tartaric acid ar
Last Answer : Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history ... . D. Optically inactive due to intramoleuclar hydrogen bonding.
Last Answer : Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history of stereochemistry. Two ... form Q is A. B. C. D. none of these
Description : Total number of stereoisomers of compound is: `CH_(3)-underset(overset(|)(OH))(C)H-underset(overset(|)(Br))(C)H-CH_(3)`
Last Answer : Total number of stereoisomers of compound is: `CH_(3)-underset(overset(|)(OH))(C)H-underset(overset(|)(Br))(C)H-CH_(3)` A. 2 B. 4 C. 6 D. 8
Description : Number of chiral carbon persent in the following compound: `CH_(3)-underset(overset(|)(OH))(C)H-CH_(2)-underset(overset(|)(Br))(C)H-underset(overset(|
Last Answer : Number of chiral carbon persent in the following compound: `CH_(3)-underset(overset(|)(OH))(C)H-CH_(2)-underset(overset( ... (3)` A. 2 B. 3 C. 4 D. 5
Description : (A) Cation carriers, e.g., `H-Br,Cl-OH` and `Br-Br` and oxidising agents such as `O_(3)` and `R-O-O-R`, etc. act as electrophilic reagents. (R) Electr
Last Answer : (A) Cation carriers, e.g., `H-Br,Cl-OH` and `Br-Br` and oxidising agents such as `O_(3)` and ... incorrect. D. IF (A) is incorrect but (R) is correct.