IUPAC Rules for Naming Organic Compounds Containing One or More Functional Groups

Posted on 04/01/201706/04/2017 by myrank

The rules are summarized as follows: 1. Select the longest continuous chain containing the carbon atom having functional group(s). 2. The numbering of atoms in the parent chain is done in such a way that carbon atom bearing the functional group gets the lowest number. 3. It two or more same functional groups are present, Read more about IUPAC Rules for Naming Organic Compounds Containing One or More Functional Groups[…]

Brain Teaser 3 (With Answers)

Posted on 04/01/201707/05/2017 by myrank

Teaser 1: Feed me and I live, yet give me a drink and I die. Answer: Fire Teaser 2: Forward I am heavy, but backward I am not. What am I? Answer: Forward I am ton, backward I am not Teaser 3: He has married many women, but has never been married. Who is he? Answer: Priest Teaser 4: Take off my Read more about Brain Teaser 3 (With Answers)[…]

Order of Magnitude Calculations

Posted on 03/01/201718/05/2017 by myrank

In order to express quantitative magnitudes only approximately, the concept of order-of-magnitude is often employed. For example, the height of a small insect, say an ant, might be 8 x 10¯⁴ m ≈ 10¯³. We would say that the order of magnitude of the height of an ant is 10¯³m. Similarly, though the height Read more about Order of Magnitude Calculations[…]

Brain Teaser 3

Posted on 03/01/201707/05/2017 by myrank

Teaser 1: Feed me and I live, yet give me a drink and I die. Teaser 2: Forward I am heavy, but backward I am not. What am I? Teaser 3: He has married many women, but has never been married. Who is he? Teaser 4: Take off my skin – I won’t cry, but you will! What am Read more about Brain Teaser 3[…]

JEE Mains Application Last Date Extended to 16.01.2017

Posted on 02/01/201710/05/2017 by myrank

In view of requests from various candidates/parents as well as schools, the date of online submission of application form of JEE (Main) – 2017 has been extended up to 16.01.2017 (11.59 PM). The fee may be paid by the candidates up to 17.01.2017 (11.59 PM). It is further informed that the other terms and conditions Read more about JEE Mains Application Last Date Extended to 16.01.2017[…]

Distance of point from plane

Posted on 02/01/201708/08/2017 by myrank

Let the equation of a plane be ax + by + cz + d = 0 When P and Q are on the same side of the plane ⇒ ⇒ ⇒ ax1 + by1 + cz1 + d and ax2 +by2 + cz2 + d are of the same sign. When P and Q are Read more about Distance of point from plane[…]

Clock Puzzles 1 [With Answers]

Posted on 02/01/201707/05/2017 by myrank

Puzzle – 1: What time should the last watch show? Answer: 7:05 Explanation: As you move from left to right, the time shown on each watch decreases by 12 minutes, then 24, 36 and 48. Puzzle – 2: Where should the hour hand point to on the bottom clock?Answer: Hour hand points to 8 Explanation: Starting with the top clock face, Read more about Clock Puzzles 1 [With Answers][…]

Clock Puzzles 1

Posted on 31/12/201607/05/2017 by myrank

Puzzle – 1: What time should the last watch show?Puzzle – 2: Where should the hour hand point to on the bottom clock?Puzzle – 3: Where should the missing hour hand point to?Puzzle – 4: Where should the minute hand point to on the bottom clock?Puzzle – 5: Where should the minute hand point to on the bottom clock? Share Read more about Clock Puzzles 1[…]

Nomenclature of organic compounds: Naming Alkanes

Posted on 31/12/201606/04/2017 by myrank

These are saturated hydrocarbons i.e., contain all single C – C bonds and only C and H atoms. 1. Naming straight chain hydrocarbons: Prefix: indicates the number of carbons Suffix: ‘-ane’ 2. Branched chain alkanes: Identify the longest carbon chain Number the carbons in the parent carbon chain such that the substituents get minimum numbers If two Read more about Nomenclature of organic compounds: Naming Alkanes[…]

Combination or Propagation of Errors

Posted on 30/12/201620/05/2017 by myrank

Generally, the result of an experiment is obtained by doing mathematical operations on several measurements. Obviously, the final error depends not only upon the errors in individual measurements but also on the nature of mathematical operations. Following are the rules for combination of errors. (a) Errors in a Sum or Difference: Let there be two Read more about Combination or Propagation of Errors[…]