Which metal pollute the air of a big city?
Which metal pollute the air of a big city?
A. Copper
B. Chromium
C. Lead
D. Cadmium
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For about how many hours food remains in small intestine?A. 2 to 6 hours
B. 12 to 25 hours
C. 7 to 11 hours
D. 24 to 48 hoursDengue Fever is also called___________?
Dengue Fever is also called___________?
A. Black Fever
B. Breakbone Fever
C. Plasmodium Fever
D. Remittent FeverSodium Carbonate is commonly called ________?
Sodium Carbonate is commonly called ________?A. Plaster of Paris
B. Washing Soda
C. Common Salt
D. None of theseSummer solstice means__________?
Summer solstice means__________?A. longest day
B. longest night
C. smallest day
D. none of theseA device which converts chemical energy into electrical energy is called __________?
A device which converts chemical energy into electrical energy is called __________?
A. motor
B. generator
C. moving-coil meter
D. batteryBatteries are devices that convert stored chemical energy into useful electrical energy. It consists of a number of voltaic cells connected in series by a conductive electrolyte containing anions and cations. A battery may be thought of as a clever variant of a standard exothermic chemical reactor that yields chemical products with lower energy content than the chemical reactants.
Also read about A device that converts mechanical energy into electric energy is called_______?Nitrogen occurs in plant and animals in the form of ___________?
Nitrogen occurs in plant and animals in the form of ___________?A. Minerals
B. Fats
C. Carbohydrates
D. Proteins