If you want to get an alarm in next 5 minutes, 10 minutes and so, you can directly setup google timer directly as shown in below image. For an example, just type six minute timer and click on Start. Now count down will start and you will get an alert once it comes to 0 second.
Ctrl+N = Open a new window Ctrl+Shift+N = Open a new window in incognito mode Ctrl+T = Open a new tab Ctrl+O = Open a file in the browser Ctrl+Shift+Q (twice) = Sign out of your Google Account on Chrome OS Ctrl+W = Close the current tab Ctrl+Shift+W = Close the current window Ctrl+Shift+T = “Reopen the last tab you’ve closed. Google Chrome remembers the last 10 tabs you’ve closed. Ctrl+1 through Ctrl+8 = Go to the tab at the specified position in the window. Ctrl+9 = Go to the last tab in the window.
Search+1 through Search+= Use F1 to F12 Alt+9 = Go to the last window open Ctrl+Tab = Go to the next tab in the window Ctrl+Shift+Tab = Go to the previous tab in the window Alt+Tab = Go to the next window you have opened. Alt+Shift+Tab = Go to the previous window you have opened Click and hold the Back or Forward arrow in the browser toolbar = See your browsing history for the tab
Backspace, or press Alt and the left arrow = Go to previous page in your browsing history.
Shift+Backspace, or press Alt and the right arrow = Go to the next page in your browsing history.
Press Ctrl and click a link = Open the link in a new tab in the background
Press Ctrl+Shift and click a link = Open the link in a new tab and switch to the newly opened tab
Press Shift and click a link = Open the link in a new window
Drag a link to a tab = Open the link in the tab
Drag a link to a blank area on the tab strip = Open the link in a new tab
Type a URL in the address bar, then press Alt+Enter = Open the URL in a new tab
Press Esc key while dragging a tab = Return the tab to its original position