Class 12 Amines

Class 12 chapter vector algebra topic dot or scalar product

Assertion : The order of basicity of amines in the gaseous phase follows the order : 3^(@) amine gt 2^(@) amine gt 1^(@) amine gt NH_(3) Reason : Amines have an unshared pair of electrons on nitrogen atom due to which they behave as Lewis base .

While calculating mode the following observation are found. Lower limit of modal class =40, frequency of modal class =20, frequency of previous class =12 , frequency of preceding class =11 and width of the class =10, find mode .

In a frequency distribution, the mid-value of a class is 15 and the class intervals is 4. The lower limit of the class is 10 (b) 12 (c) 13 (d) 14

If r% of students scored less than 33 marks, then find r, given N=50 , class size= 10 , frequency of the rth. Percentile class =12 and cumulative frequency of the rth percentile class =22 , lower limit of rth percentile class =30

Find the mean of the following frequency distributions: Class interval: 0-6 6-12 12-18 18-24 24-30 Frequency: 7 5 10 12 6

The source of nitrogen in Gabriel syntheisis of amine is..

The source of nitrogen in Gabriel syntheisis of amine is..