Last seen: Mar 10, 2022
No, the meaning of above statements is different (a) In this statement farmer gives information of only the quantity of the wheat but area and time...
The decomposition of detritus is due to activities of micro-organisms. The rate of growth of microbes is affected by temperature. The pH of substratum...
Humification leads to accumulation of a dark coloured amorphous substance called humus that is highly resistant to microbial action and undergoes deco...
The ecological pyramid assumes a simple food chain and does not accommodate food webs. Thereby, it does not take to account the fact that species may ...
It is known that, t = log = log = log 16 = 4.6 x 10-2 (approximately) Hence, the required time is 4.6 x 10-2s.
k = Here, = years-1 It is know that t = log = log = 1845 years (approximately) Hence, the age of the sample is 1845 years.
(i) Half life, t1/2 = = = 3.47 ×10-3 s (approximately) (ii) Half life, t1/2 = = = 0.35 min (approximately) (iii) Half life, t1/2 = ...
The given reaction is of the first order with respect to A and of zero order with respect to B. Therefore, the rate of the reaction is given by, R...
Let the order of the reaction with respect to A be x and with respect to B be y. Therefore, rate of the reaction is given by, Rate = k[A]x [B]y ...
Correct answer: (d) 2, 3-dimethyl-2-pentene Explanation: = O + O = 2,3-Dimethyl-2-pentene
Correct answer: (c) 3 Explanation: Molecular formula figure.png ⇒ DBE of (A) = 3
Correct answer: (a) RCOOK Explanation: (a) RCOOK 2RCOO- + 2K+ At anode 2RCOO- → 2RCOO + 2e- 2RCOO → R - R + 2CO2 At cathode 2K+ + 2e- → 2K...
Correct answer: (d) (V) and (VI) Explanation: For a compound to be aromatic it must have (4n + 2) πe– and system should be planar where n is an in...
Correct answer: (c) Butanoyl chloride + AlCl3 then Zn, HCl Explanation: The Friedal-crafts acylation reaction will give propyl phenyl ketone which...
Correct answer: (1) Lactose Explanation: In Lactose it is β-C1 -C4 glycosidic linkage. In Maltose, Amylose α-C1 -C4 glycosidic linkage is prese...
Correct answer: (2) non-linear symmetrical Cr–O–Cr bond. Explanation: figure.png dichromate ion contain non-linear symmetrical Cr–O–Cr Bond.
Correct answer: (2) tricalcium silicate Explanation: Major component of portland cement is "Tricalcium silicate (51%, 3CaO.SiO2)
Correct answer: (4) Explanation: On Increasing temperature decreases. ∵ adsorption is generally exothermic figure.png
Correct answer: (1) Explanation: As it is example of SN1. so carbocation stability↑, reaction↑ figure.png
An ecosystem is a functional unit with biotic and abiotic factors interacting with one another resulting in a physical structure. Absence of any compo...