Ncert Solutions Chemistry Class 11th

Using the rules for significant figures, the correct answer for the expression $\frac{0.02858\times 0.112}{0.5702}$ $\frac{}{}$ will be

50 mL of 0.1 M CH₃COOH is being titrated against 0.1 M NaOH. When 25 mL of NaOH has been added, the pH of the solution will be_________× 10^-2. (Nearest integer)

(Given : pKa (CH₃-COOH) = 4.76)

log 2 = 0.30

log 3 = 0.48

log 5 = 0.69

log 7 = 0.84

log 11 = 1.04

13.26. Assertion: Out of staggered and the eclipsed conformations of ethane, staggered conformation is more stable. 

Reason: Hydrogen atoms are farthest apart in staggered conformation.

13.20. How would you convert the following compounds into benzene?
(i) Ethyne (ii) Ethene (iii) Hexane.
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13.4. Write IUPAC names of the products obtained by the ozonolysis of the following compounds:
(i) Pent-2-ene (ii) 3, 4-Dimethylhept-3-ene (iii) 2-Ethylbut-l-ene (iv) 1-Phenylbut-l-ene.
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14.3. Ozone depletion is mainly due to
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14.2. BOD is a measure of

14.1. Which acid is most abundant in acid rain?
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14.5 Assertion: It is important to maintain the ozone shield ozone (O₃).

Reason: O₃ protects us from the harmful ultraviolet (UV) radiations coming from the sun.