NEET Practice Questions (MCQs) with Answers & Solutions

(d)

All are fuels.

Most liquid chemical rockets use two separate propellants: a fuel and an oxidizer. Typical fuels include kerosene, alcohol, hydrazine and its derivatives, and liquid hydrogen. Many others have been tested and used. Oxidizers include nitric acid, nitrogen tetroxide, liquid oxygen, and liquid fluorine.

(c)

An analgesic drug is one which relieves or decreases the pain, e.g., analgin, aspirin (belongs to non-narcotics class) and morphine, codeine, heroin (belongs to narcotics class).

(c)

Tranquillizers reduce anxiety and tension. They are also called psychotropic drugs. These are of two types: (a) Sedative: The drugs used for violent and mentally agitated patients e.g., equanil and diazepam. (b) Antidepressant: The drugs are used to patients who are highly depressed and lose self confidence e.g., tofranil, vitalin, amphetamines, etc.

 Methyl salicylate also known as oil of winter green is used as medicine iodex in treatment of rheumatic pains and remedy for aches, sprains and bruises.

(c) A psychedelic drug produce visual and auditory hallucinations, e.g., lysergic acid diethyl amide (LSD) 

lysergic acid, which is found in ergot, a fungus that grows on rye and other grains. It is so potent its doses tend to be in the microgram (mcg) 

LSD causes it's characteristic hallucinogenic effects via interaction with the serotonin receptors in the brain. Serotonin is a neurotransmitter that helps control your behavior and mood, governs your senses, and moderates your thoughts.

(d) Yellow fever was the first viral disease detected in human being.

(b)

Interferons are a group of signaling proteins made and released by host cells in response to the presence of several viruses

(b) It is a fact.

Measles is an acute systemic viral infection with fever, respiratory involvement and symptoms, and a rash. Measles can cause serious complications and even fatalities. Infection confers lifelong immunity. Measles is highly contagious and vaccine-preventable. 

(d) Biliquid propellant A double base propellant is a high strength, high modulus gel of cellulose nitrate (gun cotton) in glyceryl trinitrate or a similar solvent.