Last seen: Sep 10, 2021
Phenolphthalein. Base.
(a) Yellow. (b) Blue. (c) Green.
Uses of Baking Soda: It is used: as an antacid to neutralise excess acidity in the stomach. as an ingredient in certain food stuffs such as bread...
Neutralisation reaction is the reaction between an acid and a base dissolved in aqueous solution to form salt and water. Acid + Base ➝ Salt + Water ...
In the presence of moisture, Plaster of Paris gets hydrated and changes to gypsum which is a hard mass. CaSO4.1/2H2O + H2O → CaSO4.2H2O It can no ...
(a) Fresh milk is slightly acidic due to the presence of lactic acid. The presence of bacteria decreases the pH of milk and makes it sour. To prevent ...
When milk changes into curd, the pH decreases. Lactose (carbohydrate) present in milk gets converted into lactic acid. As more acid is formed, pH of t...
Fizzing in the reaction is due to the evolution of hydrogen gas by the action of metal on the acid. Mg(s) + 2HCl(aq) ➝ MgCl2(aq) + H2(g) (A) Mg(s)...
(a) Neutral: D with pH = 7 (b) Strongly alkaline: C with pH = 11 (c) Strongly acidic: B with pH = 1 (d) Weakly alkaline: E with pH = 9 (e) Wea...
The acidic behaviour of a substance is due to the presence of H+(aq) ions. As acids do not dissociate to produce H+(aq) ions in the absence of water s...
Pure or distilled water has no ions as it is a very weak electrolyte. So, no conduction of electricity takes place but rain water contains dissolved a...
Compounds such as alcohol and glucose also contain hydrogen but do not behave like an acid. Both are organic compounds with the formulae C2H5OH and C6...
(a) Word equation: Zinc + Sulphuric add ➝ Zinc sulphate + Hydrogen Balanced equation: Zn(s) + H2SO4(dil.) ➝ ZnSO4(aq) + H2(g) (b) Word equatio...
Correct answer: (c) Antacid
Correct answer: (d) 16 mL Explanation: Since 10 ml of NaOH requires 8 mL of HCl. 20 ml of NaOH require ............ HCl. Let X be the amount o...
Correct answer: (b) HCl
Correct answer: (d) 10