To add validations to your Angular Reactive Form in a modal, you can use the built-in Validators class provided by Angular. Here's how you can implement validations in your code:

1. Import the necessary modules and classes:

   import { FormGroup, FormControl, Validators } from '@angular/forms';
   

2. Create a form group and define form controls with their respective validators:

   form = new FormGroup({
     empName: new FormControl('', [Validators.required, Validators.minLength(3), Validators.maxLength(50)]),
     empContactNo: new FormControl('', [Validators.required, Validators.minLength(3), Validators.maxLength(50)]),
     email: new FormControl('', [Validators.required, Validators.email]),
     addressLine1: new FormControl('', [Validators.required, Validators.minLength(3), Validators.maxLength(50)]),
     addressLine2: new FormControl('', [Validators.required, Validators.minLength(3), Validators.maxLength(50)]),
     pinCode: new FormControl('', [Validators.required, Validators.minLength(3), Validators.maxLength(50)]),
     city: new FormControl('', [Validators.required, Validators.minLength(3), Validators.maxLength(50)]),
     state: new FormControl('', [Validators.required, Validators.minLength(3), Validators.maxLength(50)])
   });
   

3. In your HTML template, bind the form controls to the respective input fields using the formControlName directive:

   
   
   
     
   Name is required.
     
   Name should be at least 3 characters.
     
   Name should not exceed 50 characters.
   
   

4. Repeat step 3 for each input field, replacing empName with the respective form control name.

5. In your component class, you can access the form controls and their validation status using the form.controls property:

   get f() {
     return this.form.controls;
   }
   

Now, when a user interacts with the form, the validations will be triggered and the corresponding error messages will be displayed if the input is invalid.

Remember to import the necessary modules and classes, and make sure to include the ReactiveFormsModule in your app module.