List of top Chemistry Questions on Units and measurement asked in BITSAT

Given the numbers : 161 cm, 0.161 cm, 0.0161 cm. The number of significant figures for the three numbers are
Given that A + B = R and A² + B² = R². The angle between A and B is:
In the relation P = (α Z)/(β) e⁻ᵏθ, P is pressure, Z is distance, k is Boltzmann constant and θ is the temperature. The dimensional formula of β will be: