Description : What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell? (A) Cl2 & Na (B) Cl2 & H2 (C) O2 & H2 (D) Cl2 , H2 & NaOH solution
Last Answer : (D) Cl2 , H2 & NaOH solution
Description : Good quality of edible salt is obtained from brine by the process of (A) Solar evaporation (B) Vacuum evaporation (C) Freeze drying (D) Electrolysis
Last Answer : (B) Vacuum evaporation
Description : Wet chlorine gas produced during electrolysis of brine is dehydrated by (A) Spraying 66° Be H2SO4 counter current to the flow of the gas (B) Passing it through a bed of diatomaceous earth (C) Passing it through a bed of silica gel (D) None of these
Last Answer : (A) Spraying 66° Be H2SO4 counter current to the flow of the gas
Description : Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction? (A) Oxidation of Na + ions (B) Oxidation of Cl - ions (C) Reduction of Na + ions (D) Reduction of Cl - ions
Last Answer : (B) Oxidation of Cl - ions
Description : `Cl_2 + NH_3` (excess) `to A+B`
Last Answer : `Cl_2 + NH_3` (excess) `to A+B` A. (A) One of the product Is also obtained by decomposition ... is used instead of `Cl_2`, one of product remain same
Description : Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine? (A) Na2CO3 (B) NaHCO3 (C) H2 (D) None of these
Last Answer : (C) H2
Description : Brine is electrolysed by using inert electrodes. The reaction at anode is_______
Last Answer : Brine is electrolysed by using inert electrodes. The reaction at anode is_______ A. `Cl^(-)(aq.)rarr(1)/(2)Cl_(2) ... )H_(2)(g),E_("cell")^(o.)=0.00V`
Last Answer : Brine is electrolysed by using inert electrodes. The reaction at anode is_______ A. `Cl^(-)(aq)to(1)/(2)Cl_(2 ... 2)H_(2)(g), E_(Cell)^(otimes)=0.00V`
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 : Electrolysis of aqueous solution of Brine (NaCI) gives
Last Answer : Electrolysis of aqueous solution of Brine (NaCI) gives A. (A)`Cl_2` B. (B) `H_2` C. (C) NaHO D. (D) all of these
Description : Which of the following prtoducts is not formed at the anode in the hall -Heroult electrolysis process?
Last Answer : Which of the following prtoducts is not formed at the anode in the hall -Heroult electrolysis process? A. `CO_(2)` B. `O_(2)` C. `Cl_(2)` D. `F_(2)`
Description : (3) made cathode and a pure nickel red, the anode Explanation: Electroplating is the deposition by electrolysis of a coating of metal upon a conducting surface. The simplest system makes the object to be ... on the spoon is called reduction and, therefore, the spoon is also referred to as a cathode.
Last Answer : Which of the following is not a method of preparing oxygen? (1) Electrolysis of water (2) Fractional distillation of liquid air (3) Decomposition of potassium permanganate (4) Decomposition of manganese dioxide
Description : Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives (1) Copper at eathode and oxygen at anode. (2) Copper at anode and oxygen at cathode. (3) Copper at cathode and anodes dissolve to give copper. (4) Hydrogen at cathode and oxygen at anode.
Last Answer : (1) Copper at eathode and oxygen at anode. Explanation: Copper is deposited at the cathode and is dissolved at the anode. Consequently the concentration of copper ions in solution remains constant. This can be used as a method of purification of copper as only pure copper is deposited at the cathode
Description : In electrolysis, what process always occurs at the anode?
Last Answer : ANSWER: OXIDATION
Description : Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives (1) Copper at cathode and oxygen at anode. (2) Copper at anode and oxygen at cathode. (3) Copper at cathode and anodes dissolve to give copper. (4) Hydrogen at cathode and oxygen at anode.
Last Answer : Copper at cathode and oxygen at anode.
Description : The product obtained when 4-hydroxybenzene sulphonic acid is treated with an excess of bromine water is
Last Answer : The product obtained when 4-hydroxybenzene sulphonic acid is treated with an excess of bromine water ... sulphonic acid D. 2,4,6-tribromophenol
Description : Brine solution is stored/treated in __________ lined vessels/pipes. (A) Rubber (B) Lead (C) Glass (D) Nickel
Last Answer : (D) Nickel
Description : An organic acid (A) reacts with concentrated oxide (C) and a diatomic oxide (D). When D reacts with chlorine gas a poisonous gas (E) is evolve. This g
Last Answer : An organic acid (A) reacts with concentrated oxide (C) and a diatomic oxide (D). When D reacts ... hybridization D. The compound `F=NH_(2)CONH_(2)`
Description : What are the oxidation states of the atoms in diatomic gas?
Last Answer : the oxidation states are always 0 for both atoms
Description : When benzene sulphonic acid and P-nitrophenol are treated with `NaHCO_3`, the gases released, respectively, are :
Last Answer : When benzene sulphonic acid and P-nitrophenol are treated with `NaHCO_3`, the gases released, respectively, are : A. ` ... CO_(2)` D. `CO_(2), CO_(2)`
Description : __________ is obtained as a by-product in the manufacture of sodium hydroxide using brine. (A) Chlorine (B) Ammonium chloride (C) Sodium carbonate (D) Sodium bi-carbonate
Last Answer : (A) Chlorine
Description : Statement-1: Sodium chloride is added during electrolysis of fused anhdrous magnesium chloride. Statement-2: Anhydous magnesium chloride is obtained b
Last Answer : Statement-1: Sodium chloride is added during electrolysis of fused anhdrous magnesium chloride. Statement-2: ... -1 is false but Statement -2 is true
Description : The number of cornpounds.’elements oxidised by `XeF_2` among following is: HF, HBr, HCl, HI, `NH_3, CrF_2`, Pt, `S_8`
Last Answer : The number of cornpounds.’elements oxidised by `XeF_2` among following is: HF, HBr, HCl, HI, `NH_3, CrF_2`, Pt, `S_8`
Description : Ammonia forms the complex `[Cu(NH_3)_4]^(2+)` with copper ions in alkaline solution but not in acid solution. The reasons for it is:
Last Answer : Ammonia forms the complex `[Cu(NH_3)_4]^(2+)` with copper ions in alkaline solution but not in ... ` ions and `NH_(3)` molecules are not available.
Description : One mole of complex compound `Co(NH_3)_5Cl_3` gives 3 moles of ions on dissolution in water. One mole of same complex reacts with two moles of `AgNO_3
Last Answer : One mole of complex compound `Co(NH_3)_5Cl_3` gives 3 moles of ions on dissolution in water. One mole of same ... [Co(NH_(3))_(3)Cl_(3)].2NH_(3)`
Description : The metal A is prepared by the electrolysis of fused chloride. It reacts with hydrogen to form a colourless solid from which hydrogen is released on t
Last Answer : The metal A is prepared by the electrolysis of fused chloride. It reacts with hydrogen to form a colourless solid from ... is A. Al B. Ca C. Cu D. Zn
Description : Pick up the correct statement from the following: A. Hydrogen sulphide gas in excess, may cause corrosion of concrete sewers B. 4 ppm of Dissolved Oxygen (D.O.) is ensured before discharging the treated ... river C. Solubility of oxygen in sewage is 95% of that of distilled water D. All the above
Last Answer : ANS: D
Description : The reaction of compounf P with `CH_(3)MgBr` (excess) in `(C_(2)H_(5)_(2)O` followed by addition of `H_(2)O` give Q the compound Q on treatment with `
Last Answer : The reaction of compounf P with `CH_(3)MgBr` (excess) in `(C_(2)H_(5)_(2) ... and Friedel-Crafts acylation D. Dehydration and Friedel-Crafts acylation
Last Answer : The reaction of compounf P with `CH_(3)MgBr` (excess) in `(C_(2)H_(5)_(2)O` followed by addition of `H_ ... product S is The product S is A. B. C. D.
Description : A block P released from the top of a smooth inclined plane slides down the plane. Another block Q is dropped from the same point and falls vertically downwards. Which one of the following statements will be ... with the same speed (d) Block Q will reach the ground with a higher speed than block P
Last Answer : Ans:(c)
Description : The metal which cannot be obtained by electrolysis of aqueous solution of its salts is
Last Answer : The metal which cannot be obtained by electrolysis of aqueous solution of its salts is A. Ag B. Mg C. Cu D. Al
Description : Aluminium is obtained by the electrolysis of pure of `Al_(2)O_(3)` dissolved in
Last Answer : Aluminium is obtained by the electrolysis of pure of `Al_(2)O_(3)` dissolved in A. Alumina B. Bauxite C. Cryolite D. Felspar
Description : The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by (A) Electrolysis (B) Electrolytic reduction (C) Electrolytic oxidation (D) None of these
Last Answer : (B) Electrolytic reduction
Description : Which of the following metals can be obtained from its ore only by electrolysis of a molten salt ? w) cobalt x) chromium y) copper z) sodium
Last Answer : ANSWER: Z -- SODIUM
Description : Which of the following hormones is released in excess quantity during excitement’? (1) Cortisone (2) Serotonin (3) Adrenaline (4) Oestrogen
Last Answer : (3) Adrenaline Explanation: Adrenaline is a hormone produced by the adrenal glands during high stress or exciting situations. This powerful hormone is part of the human body's acute stress ... largely refers to this hormone as epinephrine, although the two terms may be used interchangeably.
Description : Which of the following hormone is released in excess quantity during excitement? (1) Cortisone (2) Serotonin (3) Adrenaline (4) Oestrogen
Last Answer : (3) Adrenaline Explanation: Adrenaline is a hormone produced by the adrenal glands during high stress or exciting situations. This powerful hormone is part of the human body's acute stress response system, ... , all of which work to increase blood flow to the muscles and oxygen to the lungs.
Description : Which of the following hormones is released in excess quantity during excitement ? (1) Cortisone (2) Serotonin (3) Adrenaline (4) Oestrogen
Last Answer : Adrenaline
Description : Which of the following hormone is released in excess quantity during excitement ? (1) Cortisone (2) Serotonin (3) Adrenaline (4) Oestrogen
Last Answer : Oestrogen
Description : If a hydrocarbon reacts with a diatomic molecule of oxygen would it be a combustion, synthesis, or single or double replacement reaction?
Last Answer : answer:Say the two are isolated in a certain area and it’s hot enough to get them to collide. I think you’d get HCO2. So synthesis. And I’ve read that HCO2 has to do with, “The Lewis Structure.” I’d try e-mailing a chemistry, physics or an astronomy professor if I were you.
Description : Nitrogen exists as diatomic molecule and phosphorus as `P_(4)`. Why ?
Last Answer : Nitrogen exists as diatomic molecule and phosphorus as `P_(4)`. Why ? A. `N_(2)` has ... P has preference to adapt structures with small bond angles
Description : A 500 mL glass flask is filled at 298 K and 1 atm, pressure with three diatomic gases, X, Y and Z . The initial volume ratio of the gases before mixin
Last Answer : A 500 mL glass flask is filled at 298 K and 1 atm, pressure with three diatomic gases, X, Y and Z . The ... . `H_2 , F_2 , O_2` D. `O_2,H_2 , F_2`
Description : What do diatomic molecules form from?
Last Answer : Diatomic molecules are formed from two atoms, different or identical.
Description : Which is not a formula for a diatomic molecule?
Last Answer : He
Description : The characteristic equation of gases pv = mRT holds good for (a) mono atomic gases (b) diatomic gases (c)real gases (d) ideal gases
Last Answer : Ans: c
Description : Which of the following elements does not normally occur as a diatomic molecule? w) hydrogen x) chlorine y) argon z) oxygen
Last Answer : ANSWER: Y -- ARGON
Description : The existence of an element in two or more forms i the same physical phase is known as: w) allotropy x) diphasisty y) polyformation z) diatomic existence
Last Answer : ANSWER: W -- ALLOTROPY
Description : Reddis-brown gas is obtained when the following are treated with conc. `H_(2)SO_(4)` ?
Last Answer : Reddis-brown gas is obtained when the following are treated with conc. `H_(2)SO_(4)` ? A. `Br^(-)` B. `NO_(2)^(-)` C. `NO_(3)^(-)` D. `SO_(3)^(2-)`
Description : A certain hypohalite on treating with hot and conc. NaOH forms anions P and Q. More stable anion among P and Q can be obtained by neutralizing Its con
Last Answer : A certain hypohalite on treating with hot and conc. NaOH forms anions P and Q. More stable ... produces a gas which Is used in fire extinguisher.
Description : Which of the following has the highest value of refractive index? (A) Brine (sea water) (B) Diamond (C) Distilled water (D) Glass
Last Answer : (B) Diamond