HSSC TGT Science Exam

41. German Silver is the alloy of which of the following?

(1) Silver & Copper
(2) Silver & Aluminium
(3) Copper, Zinc, & Nickle
(4) Nickle & Aluminium

Correct Answer: (3) Copper, Zinc, & Nickle

Solution:German Silver is alloy of copper (Cu). Zinc (Zn) and Nickle (Ni).

42. What happens to a person who receives the wrong type of blood?

(1) All the arteries constructed
(2) All the arteries dialated
(3) The RBC's agglutinate
(4) Problem in spleen & lym- phonoids

Correct Answer: (3) The RBC's agglutinate

Solution:If wrong blood is received by a person his RBC's will aglutinate and his life will end.

43. A piece of ice floating in a glasss of water. What change will be in the level of water if the ice melts completely. When it melts completely, what will happen to the level of water?

(1) Will rise
(2) Will lower down
(3) Will be the same
(iv) Cannot be determined

Correct Answer: (3) Will be the same

Solution:If ice is floating on a glass water melting the level of wa- ter of glass will be same.

44. Which of following is called "digestive bag" in the cell?

(1) Golgi body
(2) Mitochondria
(3). Ribosomes
(4) Lysosome

Correct Answer: (4) Lysosome

Solution:lysosome is called suicidal bag of cell. D Duve discovered it. It is also called digestive bag of the cell.

45. Who discovered the Solar Sys- tem?

(1) Newton
(2) John Hardly
(3) Copernicus
(4) Galileo

Correct Answer: (3) Copernicus

Solution:Copernicus discovered the soler system. He informed for the first time that the sun not the earth is the centre of the universe. He wrote the book the 'revolution bus'.

46. The phenomenon of light as- sociated with the appearance of the blue colour of light is

(1) Interference
(2) Reflection
(3) Refraction
(4) Scattering

Correct Answer: (4) Scattering

Solution:Blue colour of sky is due to scattering of light.

47. Find the correct spelt word.

Indispensable
(2) Indispansible
(3) Indespensable
(Indispenseble

Correct Answer: Indispensable

Solution:Indispensable is the correct spelt word.

48. Choose the most suitable 'one word' for the following phrase / expression.

(1) Puritan
(2) Samaritan
(3) pedant
(4) Teetotaller

Correct Answer: (4) Teetotaller

Solution:The most suitable word for the given phrase is Teetotaller.

49. Choose the one which best expresses the meaning of the given idiom/proverb.

A Snake in the grass.

(1) (Secret or hidden enemy
(2) Unforeseen happening
(3) Unrecognisable danger
(4) Irreliable person

Correct Answer: (1) (Secret or hidden enemy

Solution:The one which best expresses the meaning of the given idiom is secret or hidden enemy.

50. We are justified in accusing him the theft. (Fill in the blanks)

(4) of
(1) for
(2) with
(3) due to

Correct Answer: (4) of

Solution:we are justified in accusing him of theft.