Everyday Science MCQs

A. A1+3
B. Cs+
C. Ba+
D. Mg+2

A. Na2co3
B. Na2co3.10h2o
C. Na2co3.h2o
D. Nahco3

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

A. Lose water and remain solid
B. Gain water and remain solid
C. Gain water and become liquid
D. Remains unchanged

A. Nahco3
B. Nano3
C. Na2co3
D. Na2cro4

A. Absorbs mositure and remains solid
B. Absorbs mositure and turns to liquid form
C. Loses water of crystallization
D. Increases the number of water of crystallization

A. Hydroxide ions to reach anode
B. Chlorine gas to mix
C. Cathode to decay
D. All of the above

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

A. They are more reactive
B. They have greater atomic radii
C. They have smaller atomic sizes
D. All

A. Their oxides are basic
B. Their oxide and hydroxides are water soluble
C. Both a & b
D. They are found in earth