100 ml of N/5 NaOH will neutralize:
Correct answer: C. 1.2368g of H3BO3
- A. 0.0618g of H3BO3
- B. 0.1855g of H3BO3
- C. 1.2368g of H3BO3
- D. 0.03092g of H3BO3
Explanation
The correct answer is 1.2368g of H3BO3. The reaction between NaOH and H3BO3 is a neutralization reaction, where the base (NaOH) reacts with the acid (H3BO3) to form water and a salt. Using the normality of NaOH (N/5 or 0.2N) and the volume (100 ml or 0.1 L), we calculate the equivalent moles of NaOH, which is 0.02 equivalents. H3BO3 has a molar mass of 61.83 g/mol, and since it provides one equivalent per mole in the reaction, the equivalent weight is the same as its molar mass. Thus, 0.02 equivalents of H3BO3 corresponds to 0.02 x 61.83 = 1.2368 g, which can be neutralized by 100 ml of N/5 NaOH. The other options do not align with this stoichiometric requirement.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
Practise Acids, Bases and Salts
314 free Acids, Bases and Salts MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Acids, Bases and Salts questions
100 ml of each of 0.5 N NaOH, N/5 HCl and N/10 H2SO4 are mixed together. The resulting solution will be:
If x gm is the mass of NaHC2O4 required to neutralize 100 ml of 0.2 (M) NaOH and y gm that is required to reduce 100 ml of 0.02 (M) KMnO4 in acidic medium, then:
The strength of a mixture of HCl & H2SO4 is 0.1 N. On treatment with an excess of AgNO3 solution, 20 ml of this acid mixture gives 0.1435 gm of AgCl. The strength of the H2SO4 is:
Which of the following is/are soft bases?H2O, H-, CO,CO2, C2H4, CN-
Which of the following constitutes a set amphiprotic species?
Which of the following order represent the order for the strength of base?