A. CaO
B. CaCO₃
C. CO₂
D. None of these
Everyday Science
Which of the following elements is not essential for plants?
A. Potassium
B. Iron
C. Iodine
D. Zinc
Malaria is a disease caused by a parasite which effects the — ?
A. Lungs
B. Spleen
C. Heart
D. Liver
The most abundant gas in the atmosphere is:
A. Oxygen
B. Nitrogen
C. Hydrogen
D. None of these
Muscular and nervous disorders are due to deficiency of:
A. Vitamin w
B. Vitamin Q
C. Vitamin O
D. Vitamin E
The heating element of an electric heater is made up of:
A. Chromium
B. Nichrome
C. Graphite
D. None of these
“Leukemia” is a disease of:
A. Skin
B. Throat
C. None of these
D. Blood
Which vitamin plays important role in blood clotting:
A. Vitamin C
B. Vitamin K
C. Vitamin E
D. Vitamin A
Thermometer was invented by:
A. Volta
B. Daniel Fahrenheit
C. Torricalli
D. George Bell
The gas predominantly responsible for global warming is:
A. Nitrogen peroxide
B. Carbon dioxide
C. Carbon monoxide
D. Nitrogen
