1) Which acid is produced when milk gets sour?
A. Tartaric acid
B. Butyric acid
C. Lactic acid
D. Acetic acid
Answer : C.
2) Which of the following is a water -borne diseases?
A. Viral hepatitis B
B. Cholera
C. Dengu
D. Influenza
Answer : B.
3) Which of the following crops is of Kharif season?
A. Soyabean
B. Linseed
C. Lentil
D. Mustard
Answer : A.
4) When an ant bites a person, which irritating chemical it (ant) injects into his (person) body?
A. Acetic acid
B. Citric acid
C. Tartaric acid
D. Formic acid
Answer : D.
5) When 1 litre of water freezes, the volume of ice formed will be
A. 0.9 litre
B. 1.0 litre
C. 1.11 litre
D. 1.5 litre
Answer : C.
6) What would be the best choice for window material to keep the outside heat away?
A. Single-pane glass
B. Double-pane glass without a gap in between
C. Double-pane glass with water filled in between
D. Double-pane glass with air in between
Answer : D.
7) Water boils at a lower temperature on the hills because
A. It is cold on the hills
B. There is less carbon dioxide on the hills
C. There is a decrease in air pressure on the hills
D. there is less oxygen
Answer : C.
8) Washing soda is the common name for
A. Calcium carbonate
B. Calcium bicarbonate
C. Sodium carbonate
D. Sodium bicarbonate
Answer : C.
9) The most abundant organic molecule on the surface of the Earth is
A. cellulose
B. chitin
C. DNA
D. hemoglobin
Answer : A.
10) The persons working in textile factories such as carpet weavers are exposed to which of the following occupational disease?
A. Asbestosis
B. Asthma and Tuberculosis
C. Silicosis
D. Siderosis
Answer : B.
