Explanation

In the modern periodic table, there are 18 groups (vertical columns) and 7 periods (horizontal rows).

Explanation

Cholesteryl benzoate is an example of a liquid crystal.

Explanation

The discomfort of breathing in an unpressurized cabin is due to a Low pressure of O2.

Explanation

Benzene is the archetypical aromatic compound.

It is planar, bond angles=120º, all carbon atoms in the ring are sp2 hybridized, and the pi-orbitals are occupied by 6 electrons.

Explanation

The material used for bleaching paper pulp is sodium hypochlorite.

It acts as an effective bleaching agent.

It helping to remove color and impurities from the pulp.

Explanation

In voltammetry, diffusion current is measured as a function of scanning potential difference.

Explanation

The value of absolute zero is -273°C.

It is the theoretical temperature where all molecular motion stops.

It is equivalent to 0 Kelvin in the Kelvin temperature scale.

Explanation

• A chemical change, also known as a chemical reaction.
• It is a process that alters the composition of one or more substances, resulting in the formation of new substances with different properties.

Explanation

Blood has a pH level of around 7.3, which is closest to neutral (pH 7).

Explanation

• Gallium-67 is commonly used for the detection of prolonged infection and cancer cells.
• Gallium-67 citrate scans are frequently employed in nuclear medicine to locate inflammatory processes and malignant tumors.