Which one of the following gives white precipitate with aqueous solution of BaCl2?
A. NaHCO3 B. NaNO3 C. Na2CO3 D. Na2CrO4
Chemistry MCQs
The deliquescence is a property in which a solid____________________?
A. Absorbs moisture and remains solid B. Absorbs moisture and turns to liquid form C. Loses water of crystallization D. Increases the number of water of crystallization
In diaphragm cell level of brine in anode compartment is kept slightly higher which prevents_______________?
A. Hydroxide ions to reach anode B. Chlorine gas to mix C. Cathode to decay D. All of the above
Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?
A. Smaller electronegativity of alkali metals B. Smaller ionic radius of these metals C. De-excitation of electrons from higher energy levels to low energy level D. Excitation of electrons from low energy levels to higher energy levels
First ionization potential of alkaline earth metal is greater than alkali metals because___________________?
A. They are more reactive B. They have greater atomic radii C. They have smaller atomic sizes D. All
NaOH is named as caustic soda because________________?
A. It corrodes the organic tissues B. It is used in soda water C. It reacts with chlorine gas D. It reacts with fats to form soap
Carnalite has chemical formula__________________?
A. KCI B. KCI.MgCl2.6H2O C. Na2B4O7.10H2O D. CaCO3.MgCO3
Electrolysis of dilute solution of NaCl results at the anode_______________?
A. sodium B. hydrogen C. chlorine D. oxygen
Which ion will have maximum value of heat of hydration ?
A. A1+3 B. Cs+ C. Ba+ D. Mg+2
Which one is natron ?
A. Na2CO3 B. Na2CO3.10H2O C. Na2CO3.H2O D. NaHCO3