Questions

Permanent hardness of water may be removed by the addition of Sodium Carbonate.

The Deputy Chairman of the Rajya Sabha presides over the proceedings of the Rajya Sabha in the absence of the Chairman of the Rajya Sabha. The Deputy Chairman is elected internally by the Rajya Sabha.

NDA's Harivansh Narayan Singh becomes Rajya Sabha Deputy Chairperson on the opponent Hari Prasad.

All of the factors that contribute to global winds are 

1) Uneven warming of the earth by the sun
2) Coriolis Effect
3) Convection Cells

Process by which sediment is removed from its source is called Erosion.

Dantiwada Dam is located in Gujarat.

All statements are based on demonetization, while sentence E talks about Greece’s Perpetual Crisis.

There are two IP address assigned to each device on a Wi-Fi network.

An Internal (Private) and an External (Public) IP address.

Internal IP address is used for communication between Your computer and a smartphone or whatever devices that are connected to that Wifi network. This is unique for each. If they are same the system cannot differentiate between each device.

While, the External IP address is that visible to the the internet - the websites, the internet connected Apps so on. By default, Routers with NAT (all routers today have it) assign same Public IP address to all devices under its network.