Test: Polyhalogen Compounds - NEET MCQ

The correct answer is Option C.

Its use in the home as a spot remover should be avoided because of its poisonous nature.
Because it's vapours (incombustible vapours) are denser than air which leads to a smoother flame.

The correct answer is Option D.

Methylene chloride (Dichloromethane) Dichloromethane, also known as methylene chloride, is one of the polyhalogen compounds present in the form of solvent. Low levels of methylene chloride exposure in the air can cause slight hearing and vision impairment.
 

Chloroform, or trichloromethane, is an organic compound with formula CHCl3. It is a colorless, strong-smelling, dense liquid that is produced on a large scale as a precursor to PTFE. It is also a precursor to various refrigerants.

The correct answer is Option C.
Freon (Eg: CFCl3 – Freon11) does initiate radical chain reactions in the stratosphere, which can upset the ozone layer.

Iodoform liberates I₂, when it comes in contact with skin Antiseptic property of iodine is due to the liberation of I2, not because of iodoform itself.

The correct answer is Option C.
The chemical formula of Dichloromethane or methylene dichloride is CH2Cl2.
There are four electron domains around the carbon atom, and the electron geometry is tetrahedral.

The hybridization that corresponds to a tetrahedral geometry is sp³

The correct answer is option A
Chloroform, or trichloromethane, is an organic compound with formula CHCl3. It is a colorless, sweet-smelling, dense liquid that is produced on a large scale as a precursor to PTFE. It is also a precursor to various refrigerants. It is one of the four chloromethanes and a trihalomethane. It is a powerful anesthetic, euphoriant, anxiolytic and sedative when inhaled or ingested.

The correct answer is Option A.
Paul Hermann Muller, Swiss chemist who received the Nobel Prize for Physiology or Medicine in 1948 for discovering the potent toxic effects on insects of DDT. With its chemical derivatives, DDT became the most widely used insecticide for more than 20 years and was a major factor in increased world food production and the suppression of insect-borne diseases.

The correct answer is Option B
Ozone layer depletion increases the amount of UVB that reaches the Earth's surface. Because all sunlight contains some UVB, even with normal stratospheric ozone levels, it is always important to protect your skin and eyes from the sun.

The correct answer is option A