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 : During nitric acid manufacture, catalytic oxidation of ammonia at 800°C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH3 to NO is about __________ percent. (A) 38 (B) 68 (C) 82 (D) 98
Last Answer : (D) 98
Description : Which of the following molecules or ions involved in the Nitrogen Cycle do not contain oxygen atom? (1) Nitrite (2) Ammonia (3) Nitrate (4) Laughing gas
Last Answer : (2) Ammonia
Description : Which of the following terms denotes the polar molecules or negative ions clustered about a central positive ion? w) ligands x) isomers y) complex ions z) dipoles
Last Answer : ANSWER: W -- LIGAND
Description : In a body-centered structure for cesium chloride how many nearest neighbor chloride ions surround a cesium ion?
Last Answer : ANSWER: 8
Description : A solution containing 2.675 g of `CoCl_(3).6NH_(3)` (molar mass `= 267.5 g mol^(-1)`) is passed through a cation exchanger. The chloride ions obtained
Last Answer : A solution containing 2.675 g of `CoCl_(3).6NH_(3)` (molar mass `= 267.5 g mol^(-1)`) is passed through a ... _(3)]` D. `[CoCl(NH_(3))_(5)]Cl_(2)`
Description : The volume (in `mL`) of `0.1M Ag NO_(3)` required for complete precipitation of chloride ions present in `30 mL` of `0.01M` solution of `[Cr(H_(2)O)_(
Last Answer : The volume (in `mL`) of `0.1M Ag NO_(3)` required for complete precipitation of chloride ions present ... Cl]Cl_(2)`, as silver chloride is close to:
Description : A striking feature of living cells is a marked difference between the composition of the cytosol and the extracellular milieu. Which of the following statement(s) concerning the mechanisms of maintenance ... d. The selectivity of cell membranes relates only to ions and not organic compounds
Last Answer : Answer: a The survival of the cell requires that cytosolic composition be maintained within narrow limits, despite the constant influx of nutrients and the simultaneous outflow of waste. A ... be altered drastically as a result of regulatory or signaling processes that occur within the cell
Description : At neutral pH, a mixture of amino acids in solution would be predominantly: (A) Dipolar ions (B) Nonpolar molecules (C) Positive and monovalent (D) Hydrophobic
Last Answer : Answer : A
Last Answer : (A) Dipolar ions
Description : On treatment of 100mL of 0.1 M solution of `CoCl_(3).6H_(2)O` with excess `AgNO_(3),1.2xx10^(22)` ions are precipitated. The complex is :
Last Answer : On treatment of 100mL of 0.1 M solution of `CoCl_(3).6H_(2)O` with excess `AgNO_(3),1.2xx10^(22)` ions are ... `[Co(H_(2)O)_(4)Cl_(2)]Cl.2H_(2)O`
Description : An acid is a substance that produces hydrogen ions in water solution?
Last Answer : Yes, an acid is the answerTRUE
Description : Addition of excess aqueous ammonia to a pink coloured aqueous solution of `MCl_(2).6H_(2)O(X)` and `NH_(4)Cl` gives an octahedral complex Y in the pre
Last Answer : Addition of excess aqueous ammonia to a pink coloured aqueous solution of `MCl_(2).6H_(2)O(X)` ... solution is pink D. Z is a tetrahedral complex.
Description : Average concentration of chloride ions in cerebrospinal fluid per 100 ml is (A) 40 mg (B) 440 mg (C) 160 mg (D) 365 mg
Last Answer : Answer : B
Description : When ammonia is oxidsed by oxygen in the presence of platinum at `800^(@)C`, the gas obtained is :
Last Answer : When ammonia is oxidsed by oxygen in the presence of platinum at `800^(@)C`, the gas obtained is : A. `N_(2)O` B. NO C. `NO_(2)` D. `N_(2)O_(5)`
Description : Catalyst used in the oxidation of ammonia is (A) Platinum-beryllium (B) Platinum-rhodium (C) Cobalt-molybdenum (D) Platinum-molybdenum
Last Answer : (B) Platinum-rhodium
Description : Which of the following statement describes plasmids? A- Another name for a protoplast B- A complex membrane structure that covers the chromosome of bacteria Small, circular DNA molecules that can exist independently of chromosomes commonly C- found in bacteria D- None of the above
Last Answer : found in bacteria
Description : Digestion of protein-is necessary because (a)It not absorbed as such (b)Proteins are large molecules. (c) Proteins have complex structure. (d) Proteins are made of amino acids
Last Answer : (a)It not absorbed as such
Description : the variations are...................in nature a. Random b. Consistent c. Complex d. Compound
Last Answer : a. Random
Description : Which of the following might be considered a "red flag" indicating possible fraud in a large manufacturing company with several subsidiaries? a. A consistent record of above average ... payrolls by each subsidiary d. Complex sales-transactions and transfers of funds between affiliated companies
Last Answer : Complex sales-transactions and transfers of funds between affiliated companies
Description : A computer has very low failure rate because it uses electronic components. It produces very consistent results. This is highlighted by which of the feature of computer? A) Accuracy B) Reliability C) Versatility D) Automatic
Description : Which of the following substances undergoes chemical change on heating? (1) Sodium chloride (2) Silica (3) Lead nitrate (4) Platinum wire
Last Answer : (3) Lead nitrate Explanation: Lead nitrate on heating decomposes to lead monoxide, nitrogen dioxide and oxygen. NO2 is liberated, along with oxygen, as a reddish brown gas.
Description : Catalyst used in catalytic reforming is (A) Platinum on alumina (B) Nickel (C) Iron (D) Aluminium chloride
Last Answer : (A) Platinum on alumina
Description : Which of the following agents is used in order to make benzene react with acetyl chloride to give acetophenone? (a) Ultraviolet light (b) AlCl3 catalyst (c) Platinum catalyst (d) Al2O3 catalyst
Last Answer : AlCl3 catalyst
Description : Assertion `:-` In fish ammonia is excreted by diffusion through gill surface as ammonium ions. Reason `:-` Some amount of urea may be retained in the
Last Answer : Assertion `:-` In fish ammonia is excreted by diffusion through gill surface as ammonium ions. Reason ` ... . D. If both Assertion & Reason are false.
Description : During compensation of respiratory alkalosis, all the following changes occur except (A) Decreased secretion of hydrogen ions by renal tubules (B) Increased excretion of sodium in urine (C) Increased excretion of bicarbonate in urine (D) Increased excretion of ammonia in urine
Last Answer : Answer : D
Description : The pH value of water is kept slightly less than 7 so that hydrochloride ions may combine with ammonia ions to form (A) Mono-chloramine (NHCl) (B) Di-chloramine (NH2Cl) (C) Nitrogen tri-chloramine (NCl3) (D) All the above
Last Answer : (D) All the above
Description : Ammonia can be considered a Lewis base because it can donate: w) electrons x) protons y) hydronium ions z) hydroxide ions
Last Answer : ANSWER: A -- ELECTRONS
Description : The pulmonary ventilation frequency (number of inhalations per time unit) rises or lowers the carbon dioxide concentration in blood. If it is intense the gas is more eliminated to the exterior and if it ... carbon dioxide and also of more hydrogen ions spending and the pH of the solution is raised.
Last Answer : What are acidosis and alkalosis?
Description : P,Q, R and S are four metals whose typical reaction are given below (I) (II) When Q is added to a solution containing the ions of the other metals, me
Last Answer : P,Q, R and S are four metals whose typical reaction are given below (I) (II) When Q is added to a solution ... P lt S` D. `Q lt P lt S lt R`
Description : Which is not consistent with double helical structure of DNA? (a) A = T, C = G (b) Density of DNA decreases on heating. (c) A + T/C + G is not constant. (d) Both (a) and (b)
Last Answer : (c) A + T/C + G is not constant
Description : Assertion (A):A pair of linear equations has no solution (s) if it represented by intersecting lines graphically. Reason (R) : If the pair of lines are intersecting, then the pair has unique solution and is called ... of A. (c) A is correct; R is incorrect. (d) R is correct; A is incorrect.
Last Answer : (d) R is correct; A is incorrect.
Description : Reabsorption of chloride ions from glomerular filtrate in kidney tubule occurs by
Last Answer : Reabsorption of chloride ions from glomerular filtrate in kidney tubule occurs by A. Active transport B. Diffusion C. Osmosis D. Brownian movement
Description : Assertion `:-` The blood transports carbondioxide comparatively easily. Reason `:-` During `CO_(2)` transport chloride ions diffuse from plasma into t
Last Answer : Assertion `:-` The blood transports carbondioxide comparatively easily. Reason `:-` During `CO_(2)` ... D. If both Assertion & Reason are false.
Description : To balance the bicarbonate ion loss in RBC the chloride ions move into RBC, it is known as :-
Last Answer : To balance the bicarbonate ion loss in RBC the chloride ions move into RBC, it is known as :- A. Chloride ... C. Bohr effect D. Both (1) and (2)
Description : In the electrolysis of silver chloride, a charge of `4xx10^(5)` C is flowing through the electrolyte. Calculate the number of silver `(Ag^(+))` ions f
Last Answer : In the electrolysis of silver chloride, a charge of `4xx10^(5)` C is flowing through the electrolyte. ... silver `(Ag^(+))` ions flowing through it.
Description : Why silver nitrate reacts with chloride ions before chromate ions in Mohr's method?
Last Answer : Feel Free to Answer
Description : How many chloride ions are in calcium chloride?
Last Answer : The formula unit for calcium chloride is CaCl2. There are two chloride ions in one formula unit of calcium chloride. We can also say that there are two moles chloride ions in one mole of CaCl2.
Description : All the following statements about renal tubular acidosis are correct except (A) Renal tubules may be unable to reabsorb bicarbonate (B) Renal tubules may be unable to secrete hydrogen ions (C) Plasma chloride is elevated (D) Anion gap is decreased
Description : Chloride shift is (A) H ions leaving the RBC in exchange of Cl- (B) Cl– leaving the RBC in exchange of bicarbonate (C) Bicarbonate ion returns to plasma and exchanged with chloride which shifts into the cell (D) Carbonic acid to the plasma
Last Answer : Answer : C
Description : Catalytic activity of salivary amylase requires the presence of (A) Chloride ions (B) Bromide ions (C) Iodide ions (D) All of these
Last Answer : A
Description : Chlorine atom and chloride ions - (1) Have an equal number of protons (2) Have an equal number of electrons (3) Unequal number neutrons (4) reacts spontaneously with water
Last Answer : (1) Have an equal number of protons
Description : If there is one million Mg2+ ions in MgCl2, how many chloride ions are there? (1) Two million (2) One million (3) Half a million (4) Ten million
Last Answer : (1) Two million
Description : If Mg Cl2 contains one Millions of Mg2+ Ions, then how many Chloride Ions are present in it?
Last Answer : Two million
Description : Chloride ions activate which enzyme?
Last Answer : Amylase.
Description : During the nerve impulse transmission, following ion or ions may play significant roles D A. Sodium B. Potassium C. Chloride D. All of these
Last Answer : All of these