DESGRAÇA

  <div formArrayName="questions">
          <div *ngFor="let q of questionsArray.controls; let i = index;" [formGroupName]="i">
            <div id="question-modal" class="modal"  >
                <div class="modal-content" >
                    <h4>Criar questão</h4>
                        <div class="row" >
                          <div class="col s12">
                            <div class="input-field col s6">
                              <input id="question-title" type="text" class="validate" formControlName="title">
                              <label for="question-title" required="">Título da questão</label>
                            </div>
                            <div class="input-field col s6">
                                <select id="select_type" formControlName="type" (change)="changeQuestionType(i)">
                                  <option value="" >Escolher tipo</option>
                                  <option value="objetiva">Objetiva</option>
                                  <option value="subjetiva">Subjetiva</option>
                                </select>
                                <label>Tipo da questão</label>
                            </div>
                          </div>
                      </div>

                      <div *ngIf="isObjective" style="padding-left: 1.5%">
                          <a (click)="getData()" class="waves-effect waves-light btn"><i class="material-icons left">add</i>Adicionar alternativa</a>
                      </div>
                </div>
                <div class="modal-footer">
                 <a (click)="addQuestion()" class="modal-close waves-effect waves-green btn-flat">Salvar</a>
                </div>
            </div>
          </div>
        </div>