Description : A 0.22 M solution of lactic acid (pKa 3.9) was found to contain 0.20 M in the dissociated form and 0.02 M undissociated form, the pH of the solution is (A) 2.9 (B) 3.3 (C) 4.9 (D) 5.4
Last Answer : Answer : C
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 : The equilibrium, H2O(l) ⇌ H^+(aq) + OH^-(aq) is :
Last Answer : The equilibrium, H2O(l) ⇌ H+(aq) + OH-(aq) is : a. dynamic b. static c. physical d. mechanical
Description : The percentage degree of hydrolysis of a salt of weak acid (HA) and weak base (BOH) in its 0.1 M solution is found to be `10%.` If the molarity of the
Last Answer : The percentage degree of hydrolysis of a salt of weak acid (HA) and weak base (BOH) in its 0.1 M solution is ... A. `5%` B. `10%` C. `20%` D. none
Description : The rate of interest in RD account opened before 01 Dec 11 and on or after 01 Dec 2011 and up to 31 Mar 12 is a) 6.5%, 7% b) 7.5%, 8% c) 8%, 8.5% d) 8%, 8.2%
Last Answer : b) 7.5%, 8%
Description : 25 mL of a solution of `Fe^(2+)` ions was titrated with a solution of the oxidizing agent `Cr_(2)O_(7)^(2-)` . 50 mL of 0.01 M `K_(2)Cr_(2)O_(7)` solu
Last Answer : 25 mL of a solution of `Fe^(2+)` ions was titrated with a solution of the oxidizing agent `Cr_(2)O_ ... is the molarity of the `Fe^(2+)` solution ?
Description : Which of the following cannot dissociated as `PX_(5) hArr PX_(3) + X_(2)`
Last Answer : Which of the following cannot dissociated as `PX_(5) hArr PX_(3) + X_(2)` A. `PF_(5)` B. `PCl_(5)` C. `PBr_(5)` D. `PI_(5)`
Description : Calcination reaction of limestone (CaCO3 → CaO + CO2 ) goes to completion in the rotary kiln, because (A) CaO is not dissociated (B) CO2 escapes continuously (C) Of high calcination temperature (D) CaO is more stable than CaCO3
Last Answer : (B) CO2 escapes continuously
Description : What volume of 0.05 M `Ca(OH)_(2)` solution is needed for complete conversion of 10mL of 0.1 M `H_(3)PO_(4)` into `Ca(H_(2)PO_(4))_(2)` ?
Last Answer : What volume of 0.05 M `Ca(OH)_(2)` solution is needed for complete conversion of 10mL of 0.1 M `H_(3)PO_(4)` into `Ca(H_(2)PO_(4))_(2)` ?
Description : Oxygen and hydrogen gases are produced at the anode and cathod erespectively during electrolysis of dilute aq. Solution of
Last Answer : Oxygen and hydrogen gases are produced at the anode and cathod erespectively during electrolysis of dilute aq. Solution ... (3)` C. HCl D. `CuSO_(4)`
Description : Which one of the following does not give tetrathionate as the product, when treated with an aq solution of hypo?
Last Answer : Which one of the following does not give tetrathionate as the product, when treated with an aq solution of hypo? A. ... )` C. `CuC1_(2)` D. `FeC1_(3)`
Description : Assertion: A white precipitate is obtained when an aq solution of sodium thiosuphate is treated with `AgNO_(3)` solution and if the precipitate is hea
Last Answer : Assertion: A white precipitate is obtained when an aq solution of sodium thiosuphate is treated with ... I is not correct and Statement-II is correct
Description : Assertion : A white turbidity is obtained by passing `H_(2)S` through aq solution of `SO_(2)` Reason: Aq solution of `SO_(2)` and `H_(2)S` undergoes r
Last Answer : Assertion : A white turbidity is obtained by passing `H_(2)S` through aq solution of `SO_(2 ... Statement-I is not correct and Statement-II is correct
Description : How many tablets ,each containing 8.75 grains of mercuric chloride will be required to make one pint of 0.2% solution?
Last Answer : 4.375 gr. in 1 fl ounce = 1% w/v solution 4.375 gr X 0.2 = 0.875 gr required to get 1 fl.oz 0.2% 0.875 gr x 20 = 17.5 gr required to get 20 fl.oz 0.2 % 17.5 gr/8.75 gr = 2 tablets
Description : The volume of 3 M `Ba(OH)^(2)` solution required to neutralize completely 120 mL of 1.5M `H_(3)PO_(4)` solution is :
Last Answer : The volume of 3 M `Ba(OH)^(2)` solution required to neutralize completely 120 mL of 1.5M `H_(3)PO_(4)` solution is :
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 : The total length of a valley formed by two gradients - 3% and + 2% curve between the two tangent points to provide a rate of change of centrifugal acceleration 0.6 m/sec2 , for a design speed 100 kmph, is (A) 16.0 m (B) 42.3 m (C) 84.6 m (D) None of these
Last Answer : Answer: Option C
Description : in titration of 25 mL of the solution containing Cu2+ with the concentration of 0.01 molar , with SCN – (0.01 Molar) , if we use the indicator that changed its color in PSCN= 9. Calculate the error of titration PKSP(CuSCN) =13.4?
Last Answer : just the color change from the indicator. Thus, a careful selection of the indicator will reduce the indicator error. For example, if the equivalence point is at a pH of 8.4, then the ... are in the range of aqueous pH changes are of little use. Instead, the titrant and indicator used
Description : If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is A. 200 ppm B. 225 ppm C. 250 ppm D. None of these
Last Answer : ANS: C
Description : If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is A. 100 mg/l B. 200 mg/l C. 300 mg/l D. 400 mg/l
Last Answer : ANS: D
Description : How many angles letter M ha?
Last Answer : It has 3 interior angles
Description : In Indo-gangatic plains, rice-wheat cropping system covers about (A) 5 m ha (B) 10 m ha (C) 15 m ha (D) 20 m ha
Last Answer : (B) 10 m ha
Description : The volume of `0.1 N` dibasic acid sufficient to neutralize 1g of a base that furnishes `0.04` mole of `OH^-` in aqueous solution is :
Last Answer : The volume of `0.1 N` dibasic acid sufficient to neutralize 1g of a base that furnishes `0.04` mole of `OH^-` ... 400 mL B. 600 mL C. 200 mL D. 80 mL
Description : Two half-reactions of an electrochemical cell are given below : MnO-4 (aq) + 8H+ (aq) + 5e- → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + 2e- ... the redox equation from the standard potential of the cell and predict if the reaction is reactant favoured or product favoured. -Chemistry
Last Answer : The reactions can be represented at anode and at cathode in the following ways : At anode (oxidation) : Sn2+ → = Sn4+ (aq) + 2e- ] 5 E° = + 0.15 V At cathode (reduction) : MnO-4(aq) + 8H+ ... = E°cathode - E°anode = 1.51 - 0.15 = + 1.36 V ∴ Positive value of E°cell favours formation of product.
Description : Two half-reactions of an electrochemical cell are given below : MnO-4 (aq) + 8H+ (aq) + 5e- → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + ... -reactions and calculate the cell potential from the standard potentials and predict if the reaction is reactant or product favoured. -Chemistry
Last Answer : The reactions can be represented at anode and at cathode in the following ways : At anode (oxidation) : Sn2+ → Sn4+ (aq) + 2e- ] 5 E° = + 0.15 V Af cathode (reduction) : MnO-4(aq) + 8H+ ( ... = E°cathode - E°anode = 1.51 - 0.15 = + 1.36 V ∴ Positive value of E°cell favours formation of product.
Description : The force between two long parallel wires A and B carrying current is `0.004 Nm^(-1)`. The conductors are 0.01 m apart. If the current in conductor A
Last Answer : The force between two long parallel wires A and B carrying current is `0.004 Nm^(-1)`. The conductors are 0.01 m ... . `50 A ` C. `10 A` D. `100 A`
Description : What is the typical separation between the two conductors in a parallel wire line? A. 0.001 to 0.01 m B. 200 to 500 mm C. 0.635 to 15.24 cm D. 2.5 to 5 in.
Last Answer : C. 0.635 to 15.24 cm
Description : Out of (a) 0.01 M KNO3 , (b) 0.01 M Na2 SO4 which aqueous soln. will exhibit high B. P.?
Last Answer : (a) 0.01 M Na2 SO4
Description : A metal wire of 0.01 m dia and thermal conductivity 200 W/m.K is exposed to a fluid stream with a convective heat transfer coefficient of 100 W/m2 .K. The Biot number is (A) 5.6 (B) 0.025 (C) 3.5 (D) 0.0035
Last Answer : (B) 0.025
Description : What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water interface? The balloon is of radius 0.1 m and is filled with air. (A) 4πg/3 (B) 0.01 πgH/4 (C) 0.01 πgH/8 (D) 0.04 πgH/3
Last Answer : (A) 4πg/3
Description : To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length of the ... the water horse power of the pump is (A) 400 (B) 450 (C) 500 (D) 600
Last Answer : (D) 600
Description : Measuring with a 30 m chain, 0.01 m too short, introduces (A) Positive compensating error (B) Negative compensating error (C) Positive cumulative error (D) Negative cumulative error
Last Answer : (C) Positive cumulative error
Description : A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of ... and thickness __________ metre. (A) 0.01 (B) 0.1 (C) 0.25 (D) 0.5
Last Answer : (B) 0.1
Description : When a constant discharge 2.91 litres/sec. was obtained in a pumping test, the draw downs in the test wells at 3 m and 6.184 m were 2.6 m and 0.3 m respectively. If over-all depth of the pumping well was 16 m, the ... (A) 0.0005 cm/sec (B) 0.001 cm/sec (C) 0.002 cm/sec (D) 0.01 cm/sec
Last Answer : Answer: Option B
Description : Pick up the incorrect statement from the following: (A) Dimensions are measured to the nearest 0.01 m (B) Areas are measured to the nearest 0.01 sq.m (C) Cubic contents are measured to the nearest 0.1 cum (D) Weights are measured to the nearest 0.001 tonnes
Last Answer : (D) Weights are measured to the nearest 0.001 tonnes
Description : While preparing a detailed estimate (A) Dimension should be measured correct to 0.01 m (B) Area should be measured correct to 0.01 sqm (C) Volume should be measured correct to 0.01 cum (D) All the above
Last Answer : (D) All the above
Description : The carbohydrate content of Ig M is about (A) 2.8% (B) 6.4% (C) 8.0% (D) 10.2%
Last Answer : Answer : D
Description : The average heat transfer co-efficient over the entire length of the plate (ha ) and the local heat transfer co-efficient (hL ), in case of heat transfer over a flat plate in laminar zone is related as (A) ha = 0.8hL (B) ha = 2hL (C) ha = hL (D) ha = 5hL
Last Answer : (B) ha = 2hL
Description : The average agricultural production from irrigated area is: (a) 1/8 tonnes/ha (b) 2.0 tonnes/ha(c) 2.4 tonnes/ha (d) 2-8 tonnes/ha
Last Answer : (c) 2.4 tonnes/ha
Description : What is the field capacity of an Indigenous Plough? [a] 0.4 ha per day of 8 hours [b] 0.6 ha per day of 8 hours [c] 0.8 ha per day of 8 hours [d] 0.2 ha per day of 8 hours
Last Answer : [a] 0.4 ha per day of 8 hours
Description : Nursery area required for seedling of rice of 1 ha field is — a. 0.10 ha b. 0.20 ha c. 0.30 ha d. 0.50 ha
Last Answer : a. 0.10 ha
Description : Sweep and Junior hoe weeder have coverage capacity of a. 1 ha per day. b. 0.5 ha per day. c. 0.75 ha per day. d. None of above
Last Answer : Ans- c. 0.75 ha per day.
Description : Engine operated weeder has capacity of a. 1 ha per day b. 0.75 ha per day c. 0.5 ha per day d. None of above
Last Answer : Ans- b. 0.75 ha per day.
Description : The coverage of is dry land weeder is 0.05 ha/day. a. Peg c. 0.05 ha/day.d. None of the above.
Last Answer : Ans - b. star
Description : Unit power available for crop production is about 0.54hp/ha whereas desirable level is about ……. b. 2hp/ha c. 3hp/ha d. 2.5 hp/ha
Last Answer : Ans- a. 1hp/ha
Description : Area that one man can spray in a day is: A. 0.1 ha B. 0.2 ha C. 0.3 ha. D. 9.4 ha
Last Answer : 9.4 ha
Description : is the range of capacity of Vertical Conveyer reaper a) 0.1- 0.5 ha/h b) 0.4-0.6 ha/h c) 10-15 ha/h d) None of the above
Last Answer : 0.4-0.6 ha/h