DHS 2020 Dresser, Storekeeper, Field Worker, Social Worker, Field Evaluation Worker

*Man-Eaters of Kumaon* was written by Jim Corbett.

Norwegian explorer Roald Amundsen reached the South Pole on 14 December 1911.

The Panama Canal connects the Atlantic and Pacific oceans across Central America.

Egypt is called the Gift of the Nile because the river supports agriculture and settlement in its otherwise arid landscape.

Paris is situated on the Seine River in France.

Mercury is the smallest of the eight recognized planets. Pluto is classified as a dwarf planet.

The blue whale is the largest known living animal.

The capital of Syria is Damascus.

The currency of Bangladesh is the taka (BDT).

The Sahara is the world’s largest hot desert. Antarctica is the largest desert overall.

The right side of the heart pumps deoxygenated blood to the lungs; the left side pumps oxygenated blood to the body.

Gastric glands in the stomach secrete hydrochloric acid (HCl), which creates an acidic medium and helps activate pepsin.

The gallbladder stores and concentrates bile, produced by the liver.

Haemoglobin contains iron in its haem groups, enabling reversible oxygen binding.

Polio is caused by the poliovirus, an enterovirus.

A voltmeter measures potential difference (voltage) between two points in a circuit.

The SI unit of force is the newton (N); 1 N = 1 kg·m/s².

Bleaching powder is commonly represented as calcium oxychloride (CaOCl₂); calcium hypochlorite is the closest option given in this question.

The chemical symbol for gold is Au, from the Latin *aurum*.

Sound generally travels fastest in solids because their particles are closely spaced; it cannot travel through a vacuum.