Which one of the following is not a semiconductor ?
Which one of the following is not a semiconductor ?
A. Si
B. Ge
C. Se
D. Sn
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A solid may be made up of_________________?
A solid may be made up of_________________?A. Atoms
B. Ions
C. Molecules
D. A, B, and CThe PH of the 1.3 × 10-4 NH4Cl is__________?
The PH of the 1.3 × 10-4 NH4Cl is__________?A. 1.3
B. 4.0
C. 2.886
D. 3.886The bond angle between hybrid orbitals in methane CH3 is___________?
The bond angle between hybrid orbitals in methane CH3 is___________?A. 115.5°
B. 109.5°
C. 105. 7°
D. 180°In which of the following pairs are elements belonging to the same group ?
In which of the following pairs are elements belonging to the same group ?A. Boron & Beryllium
B. Nitrogen & Phosphorous
C. Magnesium & Aluminium
D. Gallium & HeliumThe important function of burning zone in the rotary kilm is __________________?
The important function of burning zone in the rotary kilm is __________________?A. to dry the moisture of slurry
B. to decompose lime stone to unslaked lime
C. combination of different oxides like CaO SiO2 Fe2O3 and Al2O3
D. to reduce the impuritiesAt constant temperature the pressure of an ideal gas is doubled its density becomes_______________?
At constant temperature the pressure of an ideal gas is doubled its density becomes_______________?A. Half
B. Double
C. Same
D. None