Description : Which one of the following statements about buffers is false? a. They work inside cells. b. They consist of a weak acid and weak base. c. They prevent pH shifts. d. They enhance chemical reactions.
Last Answer : d. They enhance chemical reactions.
Description : What is the pH value limit ?
Last Answer : pH ranges from 0 to 14 .
Description : What is the pH limit of fertile soil ?
Last Answer : : The pH range of fertile soil is 6.0 to 8.0 .
Description : Out of HCI and CH3COOH, which one is a weak acid and why? Describe an activity to support your answer. -Chemistry
Last Answer : Acetic acid ( CH3COOH) is a weaker acid because it does not dissociate completely into its ions in aqueous solution. Activity: Add zinc metal in HCI and CH3COOH respectively. The hydrogen gas will be evolved ... and light red in CH3COOH which shows HCI is a strong acid and CH3COOH is a weak acid.
Description : What is the color of weak acid ?
Last Answer : The color of weak acid is yellow.
Description : What is weak acid ? What is weak acid ?
Last Answer : Acids that are not completely dissolved in water but are partially decomposed, that is, all the acid molecules that do not produce hydrogen ions ( H +) are called weak acids.
Description : Which of the following plots will obtained for a conductomeric titration of strong acid against a weak base?
Last Answer : Which of the following plots will obtained for a conductomeric titration of strong acid against a weak base? A. B. C. D.
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 : Is apple a strong or a weak acid?
Last Answer : Need answer
Description : How do Ka values of weak acid and a strong acid compare?
Description : Which of the following statements about nucleic acid is most correct? (A) Both pentose nucleic acid and deoxypentose nucleic acid contain the same pyrimidines (B) Both pentose nucleic acid and deoxypentose ... (C) RNA contains cytosine and thymine (D) DNA and RNA are hydrolysed by weak alkali
Last Answer : Answer : B
Description : When the electrolyte level of a lead-acid storage battery has decreased due to normal evaporation, the level should be reestablished by adding _____________. A. distilled water only B. sulfuric acid ... of sulfuric acid and distilled water D. a strong solution of sulfuric acid and distilled water
Last Answer : Answer: A
Description : When troubleshooting a lead-acid storage battery, a weak or dead cell is best detected by _________________. A. measuring and comparing all cells' specific gravity B. taking an open circuit ... electrolyte levels of each cell D. taking each cell's temperature with a calibrated mercury thermometer
Description : An indicator is one kind of the following compound (a) Reducing agent. (b) Salt (c) Base (d) Weak base or acid only
Last Answer : (d) Weak base or acid only
Description : Antacid contain a) Weak acid b) Weak base c) Strong acid d) Strong base
Last Answer : b) Weak base
Description : Electric process as compared to wet process (for the manufacture of phosphoric acid) (A) Can use only high grade phosphate rock (B) Is used less frequently (C) Produces a valuable by-product called gypsum (D) Is weak acid process
Last Answer : (B) Is used less frequently
Description : Which of the following statements is correct about aniline? (a) is weak acid. (b) diazotizes to benzenediazonium chloride when treated with ice-cold nitrous acid. (c) can be nitrated with ... p-nitroaniline. (d) gives an intense green color with a suspension of bleaching powder in water
Last Answer : diazotizes to benzenediazonium chloride when treated with ice-cold nitrous acid.
Description : Which of the following statements is false about aniline? (a) It is a primary aromatic amine. (b) It is a weak base which forms salts with acids. (c) It liberates nitrogen on treatment with ice-cold nitrous acid. (d) It can be prepared by the reduction of nitrobenzene with tin and HCl
Last Answer : It liberates nitrogen on treatment with ice-cold nitrous acid
Description : The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong (A) Base and strong acid (B) Base and weak acid (C) Acid and weak base (D) None of these
Last Answer : Option A
Description : A buffer consists of a weak acid and is salt.
Last Answer : (i) CH3COOH + CH3COONa (ii) C6H5COOH + C6H5COONa (iii) H2CO3 + NaHCO3 (iv) H3PO3 + NaH2PO4
Description : Which remedy has vomiting, bilious with anxiety and weak pulse, every month after mensturation, cannot lie on right side or back without instantly producing dark green vomiting. Options: 1) Argentum nitricum 2) Antimonium tart. 3) Crotalus horridus 4) Carbolic acid
Last Answer : Correct Answer: 3) Crotalus horridus
Description : Before filling a class V abrasion cavity with GIC you should(+adc March07) A. Clean with pumice, rubber cup, water and weak acid B. Dry the cavity thoroughly before doing anything C. Acid itch cavity then dry thoroughly
Last Answer : A. Clean with pumice, rubber cup, water and weak acid
Description : The following is true of aluminium hydroxide gel except: A. It is a weak and slowly reacting antacid B. Its acid neutralizing capacity decreases on storage C. It interferes with absorption of phosphate in the intestine D. It causes loose motions as a side effect
Last Answer : D. It causes loose motions as a side effec