Q51) In the Atmosphere ultraviolet rays are observed by:
A) Oxygen
B) Nitrogen
C) Ozone
D) Hellium

Q52) Who is known as the father of Immunology:
A) Louis Pasteur
B) Robert Koch
C) Landsteiner
D) Edward Jenner

Q53) Velocity of Light is maximum in which of the following:
A) Diamond
B) Water
C) Vacuum
D) Hydrogen

Q54) The presence if which of the following prevents coagulation of blood inside the human body:
A) Fibrin
B) Haemoglobin
C) Heparin
D) Thromboplastin

Q55) Acid rain is caused by the pollution of the environment by:
A) Carbon Dioxide and Nitrogen
B) Carbon Dioxide and Carbon Monoxide
C) Ozone and Carbon Dioxide
D) Nitrous Oxide and Sulphur Dioxide
Q56) Which one of the following element is used in solar cells:
A) Silicon
B) Cerium
C) Astatine
D) Vanadium

Q57) Which one of the following is an example of natural acid-base indicator:
A) Methyl Orange
B) Phenolphthalein
C) Turmeric
D) All of the Above

Q58) Which of the following is a female sex hormone:
A) Androgen
B) Estrogen
C) Oxytocin
D) Insulin

Q59) Golden rice is a rich source of:
A) Vitamin A
B) Vitamin B
C) Vitamin C
D) Vitamin K

Q60) Which one of the following metal is called the Metal of Future:
A) Copper
B) Iron
C) Aluminium
D) Titanium