Daily NEET MCQ- April 12, 2022 - NEET MCQ

Right-hand thumb rule can be used to find the direction of the magnetic field at a point near a current-carrying conductor. Right hand rule states that, if the thumb of the right hand is in the direction of the current flow then, the curl fingers show the direction of the magnetic field.

Actinoids show variable oxidation states because of the smaller energy gap between 5f, 6d and 7s orbitals. Though 3+ is the most stable oxidation state, other oxidation states are possible because of the good shielding of f-electrons.

Actinoids are highly reactive metals especially in the finely divided state. All these metals are attacked by hydrochloric acid but the effect of nitric acid is very small due to the formation of a protective oxide layer on their surface.

Thorium (atomic no.90, symbol-Th) is used in atomic reactors and in the treatment of cancer. Its salts are used in making incandescent gas mantles. Thorium is formed by the radioactive of uranium and is used to treat tumours.

The emission or transmission of small particles in the form of waves or particles given off by nuclear waste during any nuclear reaction is known as nuclear radiation. If given in high dose these radiations are harmful and can be lethal.

The nuclear waste during any nuclear reaction emits or transmits off particles and photons in the form of waves or particles known as radiations. If exposed to the low amount they lead to various disorders (especially cancer).

The pollutants of nuclear waste are potent and strong that is can cause severe damage even in low doses. The hazardous waste containing radioactive material is nuclear waste.

Nuclear radiation is the emission or transmission of particles and photons in the form of waves or particles given off by nuclear waste during any nuclear reaction. This waste is usually disposed of in the deep pits dug in desert areas or in the sea bottom.

The most hazardous element among the following is uranium. It is a silvery-grey metal and its isotopes are highly unstable and radioactive. This is extremely harmful to humans and creates various disorders and can be fatal.

The axonal membrane of the neuron or nerve cell is semi-permeable in nature. At resting membrane potential, the membrane is permeable to potassium ions but nearly impermeable to sodium ions.