General Knowledge Quiz

Cyanide poisoning causes death in seconds because

• It denatures enzymes of the heart/muscle

• It breaks the electron transport chain

• It causes Lys is of red blood cells.

• It causes cardiac arrest

Answer explanation

Cyanide poisoning leads to rapid cardiac arrest by inhibiting cellular respiration, preventing the heart from receiving oxygen, which is crucial for its function. This results in death within seconds.

Which of the following can be found as pollutants in the drinking water in some parts of India? Select the correct answer using the code given below.

• Arsenic, Sorbitol, Fluoride, Formaldehyde, Uranium

• A, B, C, D and E

• A, C and E

• A and C

Answer explanation

In some parts of India, Arsenic, Fluoride, and Uranium are known pollutants in drinking water. Sorbitol and Formaldehyde are not typically found as pollutants in this context, making A, C, and E the correct choice.

Ice is packed in sawdust because

• saw dust will not get melted easily.

• saw dust is poor conductor of heat.

• saw dust is a good conductor of heat.

• saw dust does not stick to the ice.

Answer explanation

Ice is packed in sawdust because sawdust is a poor conductor of heat, which helps to insulate the ice and prevent it from melting quickly.

The term ‘brown air’ is used for

• Acid fumes

• Photochemical smog

• Sulphurous smog

• Industrial smog

Answer explanation

The term 'brown air' refers to photochemical smog, which is a type of air pollution caused by the reaction of sunlight with pollutants like nitrogen oxides and volatile organic compounds, leading to a brownish haze.

Tachycardia is a condition characterized by

• heart-rate decreases from the normal

• heart- rate increases from the normal

• heartbeat stops

• heart fails to pump

Answer explanation

Tachycardia is defined as an increased heart rate above the normal range. Therefore, the correct choice is 'heart-rate increases from the normal', as it accurately describes this condition.

In which of the following water bodies can one float without even trying to swim?

• Caspian Sea

• Red Sea

• Dead Sea

• Sea of Japan

Answer explanation

The Dead Sea is known for its high salinity, which allows people to float effortlessly without swimming. In contrast, the other water bodies do not have the same buoyancy properties.

Gestation period in human is around …. days

• 30

• 120

• 270

• 360

Answer explanation

The average gestation period in humans is approximately 270 days, making it the correct choice among the options provided. This duration is essential for fetal development.

The process of making soap is called

• Saponification

• Condensation

• Water Electrolysis

• Vaporisation

Answer explanation

The process of making soap is called saponification, which involves the reaction of fats or oils with an alkali to produce soap and glycerin. Other options like condensation and electrolysis do not relate to soap making.

The lightest gas in the atmosphere is

• Hydrogen

• Nitrogen

• Oxygen

• None of these

Answer explanation

Hydrogen is the lightest gas in the atmosphere, being the smallest and least dense element. Nitrogen and oxygen are heavier, making hydrogen the correct choice.

Which law of physics makes a perpetual motion machine impossible?

• first law of thermodynamics

• second law of thermodynamics

• third law of thermodynamics

• first and second laws of thermodynamics

Answer explanation

The first law of thermodynamics states that energy cannot be created or destroyed, while the second law states that entropy in a closed system always increases. Together, they make perpetual motion machines impossible.