1. : The coldest region among all the regions in the atmosphere is?
(A) Stratosphere
(B) Tropopause
(C) Mesopause
(D) Stratopause
2. : NH₃ is?
(A) Base
(B) Neutral
(C) Salts
(D) Acid
3. : The freezing point of water is how much in Celsius?
(A) 3
(B) 6
(C) 0
(D) 2
4. : The salts are?
(A) Alkalies
(B) Neutral
(C) Base
(D) Both A and C
5. : The total volume of water present on earth’s surface is?
(A) 1.386 Billion KM³
(B) 1.7 KM³
(C) 1.3 Trillion KM³
(D) 1.33 Million KM³
6. : The organic compounds are originated from?
(A) Rocks
(B) Living organisms
(C) Air
(D) Sky
7. : The vital function of protoplasm is due to the presence of?
(A) Calcium
(B) Minerals
(C) Water
(D) Fats
8. : Which of the following are insoluble in water?
(A) Starch
(B) Salts
(C) Sugars
(D) Alkanes
9. : The quantity of fresh water present on Earth is only about?
(A) 3.1%
(B) 3.6%
(C) 2.5%
(D) 0.09%
10. : Polyhydroxy compounds of aldehydes and ketones are called?
(A) Vitamin
(B) Carbohydrates
(C) Protein
(D) Lipids