ANS:D - Kangaroo

Explanation: All except Kangaroo have thick hair or fur on their skin.

ANS:B - protons

Because of the sharing process of electrons, a number of electrons is not equal to no. Of protons. It is true only neutral.

ANS:D - greater than 0.1 mm.

Hazen's formula, also known as Hazen-Williams formula, is not used for calculating the settling velocity of particles. Instead, it is a hydraulic formula commonly used to calculate the flow rate of water in pressurized pipes, such as those used in water distribution systems. For calculating the settling velocity of particles, Stokes' law is typically used. Stokes' law applies to particles in a fluid medium, and it calculates the settling velocity based on the particle size, density, fluid viscosity, and gravitational acceleration. However, if we were to discuss particle sizes in the context of sedimentation or settling processes, particles with diameters less than 0.01 mm (millimeters) are typically classified as clay-sized particles. These particles are very fine and can remain suspended in water for extended periods. Therefore, if we were to relate Hazen's formula to particle sizes, it would not be appropriate to specify a particle diameter.

ANS:B - False

111 + 111 = 1110.

ANS:B - free expansion of an ideal gas.

The thermodynamic law 𝑃𝑉𝑦=constantPVy=constant represents a polytropic process, where 𝑃P is pressure, 𝑉V is volume, and 𝑦y is a constant exponent. Let's analyze each scenario:

1. Ideal compression of air: In this scenario, the compression process could be approximated by a polytropic process, so the law could be applicable.
2. Free expansion of an ideal gas: During free expansion, the gas undergoes an irreversible process with no work done. Since there's no defined pressure or volume relationship during free expansion, the polytropic law does not apply here.
3. Adiabatic expansion of steam in a turbine: Adiabatic expansion involves the expansion of a fluid without heat exchange with the surroundings. In the case of steam, it could be better described by the ideal gas law or the steam tables, but not necessarily by a polytropic process.
4. Adiabatic compression of a perfect gas: Adiabatic compression is a process where a gas is compressed without heat exchange with the surroundings. This process is typically described by the polytropic equation, making the law applicable.

ANS:A - Rabi Sankar

The government has granted a one-year extension to T. Rabi Sankar as Deputy Governor of the Reserve Bank of India (RBI). Sankar, a seasoned central banker, has been overseeing crucial departments within the RBI since his initial appointment in 2021. His re-appointment underscores the continuity of leadership and his significant role in managing key aspects of India's financial system.

ANS:A - Rani Rampal

Indian hockey player Rani Rampal became the first woman in the sport to have a stadium named after her.