Last seen: Sep 10, 2021
Sulphuric acid < car battery acid < washing up liquid < milk of magnesia < metal polish < oven cleaner since: Red : pH = 1 Pink : p...
(a) Potatoes grow better in acidic soil having pH = 5.5 (b) Broccoli grows better in alkaline soil since adding a lot of lime to acidic soil will ma...
Weakly alkaline: D (pH = 11) Neutral : C (pH = 7) Strongly acidic: A (pH = 1) Strongly alkaline: E (pH = 13) Weakly acidic : B (pH = 5)
Carbon and Sulphur being non-metals form acidic oxides.
(a) Milk is made slightly alkaline so that it may not become sour easily due to the formation of lactic acid in it. (b) The alkaline milk takes a lo...
Correct answer: (d) All the molecules move in straight line between collision and with same velocity. Explanation: Molecules move very fast in all...
Correct answer: (b) Particles of a gas are always in constant and random motion. Explanation: Particles of a gas are always in constant and random...
Correct answer: (a) 1.750 L Explanation: According to Boyle’s law = ; = = 1750 mL = 1.750 L
Correct answer: (c) At high pressure and low temperature Explanation: At high pressure and low temperature, gaseous atoms or molecules get closer ...
Correct answer: (a) 1 : 3 Explanation: From ideal gas equation, PV = nRT PV = ()RT or M = m Let the molecular wt. of A and B be MA and MB resp...
Correct answer: (d) Gases will form homogenous mixture Explanation: All the gases occupy the available volume and will form homogeneous mixture.
Correct answer: (d) 24 mm Hg Explanation: Volume of 0.0168 moles at STP = 0.0168 × 22400 = 376.3mL = or = or P2 = 730 mm Pressure of...
Correct answer: (a) 150 mm of Hg Explanation: Given initial volume (V1) = 600 c.c.; Initial pressure (P1) = 750 mm of Hg and final volume (V2) = 5...
Correct answer: (b) 3.375 Explanation: = = 75 cm3 mol-1 b = = 25 cm3 mol-1 = 0.25 L mol-1 ∴ Tc = = = = 5.76 gL-1 ⇒ a = 3.375
Correct answer: (c) 1 mole NH3 at 300 K and 1 atm occupies volume 22.4 L Explanation: For ideal gas PV = nRT Volume of 1 mole gas at 1 atm pres...
Correct answer: (c) Explanation: = at const. pressure ⇒ = , = 30.6 litre
Correct answer: (a) 1:1 Explanation: P ∝ d and T, = = x ⇒ P1 : P2 = 1:1
(a) As the concentration of hydrogen ions increases, the solution becomes more acidic. (b) As the concentration of hydroxide ions increases, the sol...
(a) When zinc granules are heated with sodium hydroxide solution, then sodium zincate salt and hydrogen gas are formed. 2NaOH(aq) + Zn(s) + Heat → N...
(a) Acids are those chemical substances which have a sour taste. Example: Acetic acid and citric acid. Base is a chemical substance which has a b...