Class 6 Factor & Multiples basic introduction

Which of the following factors may result in introduction of new variations ?

Number System- Introduction

Statement-1: In Friedel-Craft's acylation reaction multiple acyclation product is obtained and Statement-2 Introduction of alkyl group activates benzene ring.

Arithmetic progression class 10 || Basic introduction

Acid Base and Salt Introduction

Explain briefly the plant introduction.

Which of the following factors help in evolution but is considerd the basic factor for evolution :

Every counting number has an infinite number of (a)factors (b) multiples prime factors (d) none of these

The order of basic strength of the given basic nitrogen atoms is :