134 questions · 0 answers
For a weak diprotic acid, H2A, for which Ka1 = 2.1 x 10-7 and Ka2 = 4.3 x 10-13 the A2- ion concentration at equilibrium will be:
(a) approximately equal to the initial concentration of H2A.
(b) roughly equal to Ka2.
(c) roughly equal to the HA- concentration.
(d) much larger than the HA- concentration.
(e) approximately equal to the H3O+ concentration
H2Gly is an acid and Na2Gly is a base. On the basis of the values of Ka1 and Ka2 for H2Gly and the values of Kb1 and Kb2 for Na2Gly, would an 0.10 M NaHGly solution be acidic, basic, or neutral? (H2Gly: Ka1 = 4.5 x 10-3, Ka2 = 2.5 x 10-10)
(a) slightly acidic
(b) slightly basic
(c) neutral (pH = 7)
(d) there is no way to predict whether NaHGly is an acid or base.
The data that is produced as a result of processing by theCPU is known as: (AIIMS Nagpur NO 2018)a. Scanning
b. Output
c. Input
d. None of these
The small graphical buttons in Windows, which representfolders, data files, program files, etc. a. Programs b. Orientationc. Presentation d. Icons
One or more users simultaneously on two or more processors are known as: (AIIMS Nagpur NO 2018)a. Time sharing b. Multiprogrammingc. Multitasking d. Multiprocessing
Slides can have: a. Title, text, graphsb. Drawn objects, shapesc. Clipart, drawn art, visuald. All of the above
To Boot/Boot up a computer means:a. Start the computer b. Install a programc. Shut Down the computer d. Restart the computer
The ______ option is used to reverse the lastaction performed on the document.a. Cut b. Closec. Save d. Undo
A class of computer that operates on discrete discontinuousnumerical digits using the binary numbering system:a. Analog b. Digitalc. Hybrid d. None of these
Modem is short form of: a. Modulating and demodulating deviceb. Model and demodeling devicec. Modulating and decoding deviced. None of the above
41 - 50 of 134
