The number of times a particular item occurs in a given data is called its variation                           (b)  frequency      (d)  class-size

The number of atoms touching a particular atom in a crystal is called its ……….

The number of individuals of a species in a particular ecosystem at a given time remains constant due to:

Write the number of terms in given polynomial : 23 + a xx b div 2

Systematic enumeration of plant species occurring in a given region is called : (a) flora (b) fauna (c) monograph (d) manual

Systematic enumeration of animal species occurring in a given region is called : (a) flora (b) fauna (c) monograph (d) manual

The number of permutations of n things taken r at a time if 3 particular things always occur is

The difference between the upper and the lower class limits is called mid-points (a)group (b) class size frequency (c)Class size (d) mean

Exmine the given graph carefully. In the graph show above represents the number of girls in a particular class and represents the number of boys in the same class. Read and answer the following questions. (i) Which class has the least number of students ? (ii) Which class has maximum number of students ? (iii) What is the ratio between the number of girls and the number of boys of class V.

Which of the following statements is correct regarding redox reactions ? (A)An increase in oxidation number of an element is called reduction (B)A decrease in oxidation number of an element is called oxidation. (C)A reagent which lowers the oxidation number of an element in a given substance is reductant. (D)A reagent which increases the oxidation number of an element in a given substance is reductant

Fill in the blanks. b. The number of times an object looks exactly as it looked before the rotation started in one complete rotation is called ________.