By how much does the speed of sound increase with rise of temperature ?

Why does the rate of a reaction increase with rise in temperature?

 Why does the rate of a reaction increase with rise in temperature?

By how much the wave velocity increases for 1^(@)C rise of temperature ?

The rate of reaction becomes 2 times for every 10^@C rise in temperature. By how much will the rate of reaction increase when temperature is increased from 30^@C to 80^@C ?

Statement 1: A tuning fork of constant frequency sends sound waves in air. If temperature of the air increases, then the wavelength of sound wave in air decreases. Statement 2: Speed of sound in air increases with increases in temperature of air