Mole | MCQs

Explanation

The smallest particle of a compound is called a molecule.

Molecules are formed when atoms of the same or different elements combine. 

while

The matter is made up of the smallest particles called atoms

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ND20.1.2023

Explanation

Molecular crystals are generally soft and stable.

They are composed of molecules held together by relatively weak intermolecular forces, which results in them being easily deformed and having low melting points.

While they are generally stable under normal conditions, they can become unstable under extreme temperatures or pressures.

Explanation

In 1-butyne, the hydrogen is attached to a carbon with a triple bond (sp hybridization), which makes it more acidic because the carbon can better stabilize the negative charge formed after losing the hydrogen ion.

Explanation

The empirical formula of glucose is CH2O.

This represents the simplest whole-number ratio of the elements in glucose.

It has a molecular formula of C6H12O6.

Explanation

The average translational kinetic energy of a molecule in an ideal gas is given by the formula:

E=3/2​kT

Where:

• $k = 1.38 times 10^{-23} , text{J/K}$ (Boltzmann constant)

• T=27∘C=300K (since 27°C + 273 = 300 K)

Now calculate:

E=3​/2×1.38×10^−23×300
E=3/2​×4.14×10^−21

6.21×10^−21 J

Explanation

HIV is a retrovirus, meaning that it carries single-stranded RNA as a genetic material rather than the double-stranded DNA carried by human cells.

Aids way to spread is Touch

AIDS stands for Acquired Immunodeficiency Syndrome.

HIV stands for Human Immunodeficiency Virus.

HIV attacks the immune system of the body 

AIDS virus has single-stranded RNA

AIDS is not a genetic disorder

Explanation

Helium hydride (HeH+) was the first molecule discovered in space, identified in 2019 by astronomers.

It was found in a planetary nebula, marking a significant discovery in molecular chemistry in space.

Explanation

Explanation

Diffusion refers to the process by which molecules intermingle as a result of their kinetic energy of random motion.

It is the net movement of molecules or atoms from a region of high concentration to a region of low concentration.

This is also referred to as the movement of a substance down a concentration gradient.

Explanation

A heterocyclic compound is a ring structure that contains at least one atom other than carbon in the ring.

Pyridine has a nitrogen atom in its ring structure, making it a heterocyclic compound.