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TLS Online TPP Program

#Question id: 7455

At what time after 4 O’ clock, the hour and time minute hands will Lie opposite to each other ?

#General Aptitude
  1. 4-50’-31” 
  2. 4-52’-51”
  3. 4-53’-23” 
  4. 4-54’-33”
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TLS Online TPP Program

#Question id: 377

#XL - S Microbiology

The aqueous solution with the highest pH is:
TLS Online TPP Program

#Question id: 378

#XL - S Microbiology

Which of the following statements about buffers is true?
TLS Online TPP Program

#Question id: 379

#XL - S Microbiology

A compound has a pKa of 7.4. To 100 mL of a 1.0 M solution of this compound at pH 8.0 is added 30 mL of 1.0 M hydrochloric acid. The resulting solution is pH:
TLS Online TPP Program

#Question id: 380

#XL - S Microbiology

The Henderson-Hasselbalch equation:
TLS Online TPP Program

#Question id: 381

#XL - S Microbiology

Consider an acetate buffer, initially at the same pH as its pKa (4.76). When sodium hydroxide (NaOH) is mixed with this buffer, the:
TLS Online TPP Program

#Question id: 382

#XL - S Microbiology

The molar ratio of sodium acetate to acetic acid in a buffer solution with a pH OF 5.76 is 10:1. Assuming the total buffer concentration is 2.2 X 10-2 mol/L, how many grams of sodium acetate (m.w. 82) and how many grams of acetic acid (m.w. 60) should be used in preparing a litre of the solution?