HSSC PATWARI EXAM

41. Diego armando Maradona is a famous player associated with

(1) Football
(2) Kabaddi
(3) Hockey
(4) Golf

Correct Answer: (1) Football

Solution:Diego armando Maradona km² is an argentine retired professional footballer. He is widely regarded as one of the greatest football players of all time. He was one of the two joint winners of the fifa player of the 20th century award.

42. The term "butterfly stroke' is associated with

(1) Kabaddi
(2) Weightlifting
(3) Boxing
(4) Swimming

Correct Answer: (4) Swimming

Solution:The butterfly is a swimming stroke swum on the chest, with both arms moving symmetrically, accompanied by the butterfly kick (also known as the "dolphin kick").

43. Which one of the following metals does not react with water to produce hydrogen?

(1) Potassium
(2) Cadmium
(3) Sodium
(4) Lithium

Correct Answer: (2) Cadmium

Solution:Most alkali metals and alkaline earth metals react with water to produce hydrogen.... Cadmiun however, does not react with water, and francium is much too rare and unstable to be relevant to this. question. When mixed with water, the alkaline earth metals generally produce a weaker reaction than the alkali metals.

44. From which of the following trees quinine is obtained ?

(1) Eucalyptus
(2) Rauwolfia serpentina
(3) Walnut
(4) Cinchona

Correct Answer: (4) Cinchona

Solution:Quinine was first isolated in 1820 from the bark of a cinchona tree. Bark extracts have been used to treat malaria since at least 1632.

45. The hardest part of human body is

(1) Bone
(2) Nail
(3) Dentine
(4) Enamel

Correct Answer: (4) Enamel

Solution:Tooth enamel is the hardest and most highly mineralized, substance in the human body. It is a tissue and not a bone. This tissue has high mineral content which makes it hardest substance. Femur and temporal bone of the skull are the hardest bones of the human body.

46. Dry ice is

(1) Ice which never melts
(2) Frozen heavy water
(3) Solid carbon dioxide
(4) solid nitrogen

Correct Answer: (3) Solid carbon dioxide

Solution:Dry Ice is the common name for solid carbon dioxide (CO2). It gets this name because it does not melt into a liquid when heated; instead, it changes directly into a gas (this process is known as sublimation).

47. The image formed by a pin hole camera is

(1) Real and erect
(2) Virtual and erect
(3) Real and inverted
(4) Virtual and inverted

Correct Answer: (3) Real and inverted

Solution:A pinhole camera is a simple camera without a lens but with a tiny apreture, a pinhole - effectively a light-proof box with a small hole in one side. Light from a scene passes through the apreture and projects an inverted image on the opposite side of the box. which is known as the camera obscura effect.

48. Which of the following liquids has the least density?

(1) Fresh water
(2) Salt water
(3) Petrol
(4) Mercury

Correct Answer: (3) Petrol

Solution:Petrol liquids has the least density.

49. The material used in the manufacture of lead pencil is

(1) Graphite
(2) lead
(3) Carbon
(4) Mica

Correct Answer: (1) Graphite

Solution:The most important ingredient in a pencil is the graph- ite, which most people continue to call lead. Conté's method of combining graphite with clay is stillused, and wax or other chemicals are some. times added as well. Virtually. All graphite used today is a manufactured mixture of natural graphite and chemicals.

50. The number of chambers in the human heart is

(1) 2
(2) 3
(3) 4
(4) 5

Correct Answer: (3) 4

Solution:In humans, other mammals, and birds, the heart is divided into four chambers: Upper left and right atria; and lower left and right ventricles. Commonly the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart.