One of the main reasons why chromate and dichromate anions are coloured is because of the presence of the transition ions (chromium (vi) ions).... View Article
Copper (II) nitrate is blue in colour mainly because this chemical compound tends to absorb a particular colour when light passes through it... View Article
When aniline is treated with aqueous bromine the bromine water gets decolourized. There is a formation of white precipitate. 2,4,6-tribromo... View Article
Transition elements have a high enthalpy of hydration because of the presence of strong metallic bonds which is a result of the unpaired electron... View Article
An electrolytic cell typically consists of two electronic or metallic conductors known as electrodes which are usually kept at a distance from... View Article
Diazotization is usually carried out at low temperatures between 0 – 5 °C. We have to maintain low temperatures because if the temperature is... View Article
The weakest force in chemistry is the London dispersion force. It is a temporary attractive force that is produced when electrons in two... View Article
Mercuric chloride also known as Mercury(II) chloride is a very poisonous form of mercury. It is a type of mercury salt or a chemical compound of... View Article
If we look at the simple way to name amides then we can refer to them as derivatives of carboxylic acids. So here, we can take the -ic (acid)... View Article
Amides are used widely in many instances. Some of them are as follows; It is used in the formation of resilient materials such as nylon or... View Article
Amide which is also referred to as carboxamide is an organic compound with the common formula RC(=O)NR′R″. Here, the R, R', and R″ denotes... View Article
Solution: Option (B) 4/9 Total number of possible ways = 9C5 = 126 Case 1: Couples serve committee =7C3 = 35 Case 2: Couple does not serve... View Article
Solution: option (4) 1/126 Total number of ways = 10! Total number of favourable ways = 2x 5!x 5! Hene, required probability = (2x 5!x 5!)/10!... View Article
Solution: Option (4) None of these. There are a total of 40 consecutive integers. Out of which 20 are even integers and 20 are odd integers... View Article
Solution: Option (3) ⅕ Total number of persons = 15 = n(E∪H) Number of persons who speak Hindi, n(H) = 10 Number of persons who speak English,... View Article
Solution: Option (3) 1/9 Total number of houses = 3 = Number of favourable cases Total number of ways = 3x 3x 3 = 27 (as each person can apply... View Article
Solution: Option (2) 52/77 Odds in favour = 2:5 Probability of happening = 2/7 Probability of not happening = 1-(2/7) = 5/7 Odd in favour of... View Article
Solution: Option (2) â…š The total number of ways that three letters are placed in three envelopes are 3! The probability of placing all the... View Article
A box contains 9 tickets numbered 1 to 9 inclusive. If 3 tickets are drawn from the box without replacement, the probability that they are... View Article
