My iPad apps are not getting updated. It is not getting connected to iTunes Store. It is workin g very slow. Kindly advise me

Try a forced restart. Hold down on the sleep and home buttons for about 10 seconds until the Apple logo appears on the screen. No data is lost. It's like rebooting your computer.

If the steps suggested by Demodon't help, try to reset your device. This won't delete your data stored on the phone.

• Press and hold the Sleep/Wake button
• Press and hold on the Home button
• Keep holding both buttons until the display turns off and back on with Apple logo on it.

Alternatively, you may go to Settings - General - Reset - Reset All Settings

https://support.apple.com/en-us/HT201559

If this does not help, restore your device to factory settings. Note that this will erase the data from your device.

Take a look this Apple Support article: Use iTunes to restore your iPhone, iPad, or iPod to factory settings - Apple Support.