Submit custom form using Popup modal in Magento 2

try this one for ajax request on modal popup window.

html Code

<div style="margin-top: 15px;">
    <button type="button" id="openModel" class="custom_model_popup">Questions?</button>
    <div id="myModel">
        <form action="<?php  echo $baseURL . 'pq/';?>" method="post" id="form-validate" enctype="multipart/form-data" autocomplete="off" data-mage-init='{"validation":{}}' data-hasrequired="<?php /* @escapeNotVerified */ echo __('* Required Fields') ?>">
            //fields
        </form>

    </div>
    <span id='ajax_loader1' style='display:none'>
            <img src="<?php echo $baseURL; ?>pub/media/home/loader-2.gif" style="height: 150px;width: 150px">
    </span>
</div>

JS Code

<script>

    require(
        [
            'jquery',
            'Magento_Ui/js/modal/modal'
        ],
        function($,modal) {
            var options = {
                type: 'popup',
                responsive: true,
                innerScroll: true,
                title: 'Product Question',
                closeText: 'Close',
                buttons: [{
                    text: $.mage.__('Submit'),
                    class: '',
                    click: function (data) {

                        var form_data = jQuery("#form-validate").serialize();

                        jQuery('#ajax_loader1').show();

                        //alert(form_data);
                        jQuery.ajax({
                            url: "<?php  echo $block->getBaseUrl() . 'pq/';?>",
                            type: 'POST',
                            data : form_data,
                            success: function(data){
                                jQuery('#ajax_loader1').hide();
                                console.log(data);
                            },
                            error: function(result){
                                console.log('no response !');
                            }
                        });

                        this.closeModal();

                    }
                }],
                /**
                 * Escape key press handler,
                 * close modal window
                 */
                escapeKey: function () {
                    if (this.options.isOpen && this.modal.find(document.activeElement).length ||
                        this.options.isOpen && this.modal[0] === document.activeElement) {
                        this.closeModal();
                    }
                }
            };
            var popup = modal(options, $('#myModel'));
            $("#openModel").on("click",function(){
                $('#myModel').modal('openModal');
            });



        }
    );



</script>