Science GK Quiz for SSC Exams

The extent to which something is poisonous or harmful.

Expert-Verified AnswerNitrogen hydroxide is not used as an alkali as it is an acid. The other name of Nitrogen hydroxide is Nitric acid.

Detergent can be defined as a surfactant or a mixture of surfactants with cleansing properties when in dilute solutions. However, conventionally, detergent is used to mean synthetic cleaning compounds as opposed to soap (a salt of the natural fatty acid), even though soap is also a detergent in the true sense.

Soaps are defined as salts of fatty acids, which are prepared by neutralizing the corresponding fatty acid or oil with a base, such as sodium hydroxide, potassium hydroxide, ammonium hydroxide or triethylamine.

The biochemical compound is any compound that contains carbon and is found in living things. It is involved in every process of life i.e growth of the human body, digestion of food, respiration, etc. Bio-chemical compounds are used in skin treatments, food preservatives, and cooking oils.

Sleeping under a tree is not advisable at night, since photosynthesis does not occur, oxygen is not being produced by the trees. In addition to this, the trees continue respiring thereby causing the amount of carbon dioxide to be increased and the amount of oxygen to be reduced.

A normal resting heart rate for adults ranges from 60 to 100 beats per minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness.

The normal range for 24-hour urine volume is 800 to 2,000 milliliters per day (with a normal fluid intake of about 2 liters per day). The examples above are common measurements for results of these tests. Normal value ranges may vary slightly among different laboratories.

Eye color is directly related to the amount of melanin in the front layers of the iris. People with brown eyes have a large amount of melanin in the iris, while people with blue eyes have much less of this pigment.

Oxytocin is an oligopeptide hormone secreted by pars nervosa of pituitary glands of birds and mammals and is involved in contraction of alveoli of mammary glands during release of milk.