General Science The percentage of oxygen present in air is approximately- 0.4 0.23 0.21 0.44 0.4 0.23 0.21 0.44 ANSWER DOWNLOAD EXAMIANS APP
General Science In fireworks, the green flame is produced because of Potassium Mercury Sodium Barium Potassium Mercury Sodium Barium ANSWER DOWNLOAD EXAMIANS APP
General Science Tetraethyl lead is used as Pain Killer Mosquito Repellent Petrol Additive Fire Extinguisher Pain Killer Mosquito Repellent Petrol Additive Fire Extinguisher ANSWER DOWNLOAD EXAMIANS APP
General Science The wavelength of X-rays is of the order of 1 cm 1 angstrom 10 micron 1 m 1 cm 1 angstrom 10 micron 1 m ANSWER DOWNLOAD EXAMIANS APP
General Science In an atomic nucleus, neutrons and protons are held together by: Coulombic forces Gravitational forces Magnetic forces Exchange forces Coulombic forces Gravitational forces Magnetic forces Exchange forces ANSWER DOWNLOAD EXAMIANS APP
General Science Gypsum is added to cement clinker to Decrease the rate of setting of cement Increase the tensile strength of cement Facilitate the formation of colloidal gel Bind the particles of calcium silicate Decrease the rate of setting of cement Increase the tensile strength of cement Facilitate the formation of colloidal gel Bind the particles of calcium silicate ANSWER DOWNLOAD EXAMIANS APP
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