Basicity of orthophosphoric acid is________?
Basicity of orthophosphoric acid is________?
A. 2
B. 3
C. 4
D. 5
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Crystals of Na2CO3. 10H2O when exposed to air_________________?
Crystals of Na2CO3. 10H2O when exposed to air_________________?A. Lose water and remain solid
B. Gain water and remain solid
C. Gain water and become liquid
D. Remains unchangedThe value of e/m ratio of electron is________________?
The value of e/m ratio of electron is________________?A. 6.02 x 1023 C/kg
B. 1.7588 x 1020 C/kg
C. 9.1095 x 10-31 C/kg
D. 1.7588 x 1011 C/kgAbsolute alcohol is obtained when rectified spirit is treated with__________________?
Absolute alcohol is obtained when rectified spirit is treated with__________________?A. Ca(OH)2
B. CaCO3
C. CaCl2
D. CaOmoles of each aluminium and oxygen react with each other to produce aluminium oxide. The amount of product formed is______________________?
moles of each aluminium and oxygen react with each other to produce aluminium oxide. The amount of product formed is______________________?A. 0.18 mole
B. 0.27 mole
C. 0.24 mole
D. 0.09 moleWhich one of the following is not a periodic property ?
Which one of the following is not a periodic property ?A. Melting point of elements
B. Boiling point of elements
C. Ionization energy of elements
D. Coordination number of ionsThe distinction test for primary secondary and tertiary alcohol required to react each of them is_________________?
The distinction test for primary secondary and tertiary alcohol required to react each of them is_________________?A. Cone. HCI and anhydrous SOCl2
B. Cone. HCI and anhydrous CaCl2
C. Cone. HCI and anhydrous PCl2
D. Cone. HCI and anhydrous ZnCl2