WBJEE · Chemistry · Some Basic Concepts of Chemistry
Which of the following will decrease the \(\mathrm{pH}\) of a \(50 \mathrm{ml}\) solution of \(0.01 \mathrm{M} \mathrm{HCl}\) ?
- A addition of \(5 \mathrm{ml}\) of \(1 \mathrm{M} \mathrm{HCl}\)
- B addition of \(50 \mathrm{ml}\) of \(0.01 \mathrm{M} \mathrm{HCl}\)
- C addition of \(50 \mathrm{ml}\) of \(0.002 \mathrm{M} \mathrm{HCl}\)
- D addition of Mg
Answer & Solution
Correct Answer
(A) addition of \(5 \mathrm{ml}\) of \(1 \mathrm{M} \mathrm{HCl}\)
Step-by-step Solution
Detailed explanation
\(50 \mathrm{ml} 0.01 \mathrm{M} \equiv 50 \times 0.01=0.5\) millimole \(\quad 5 \mathrm{ml} 1(\mathrm{M}) \equiv 5 \times 1=5\) millimole \(\quad\) Total millimoles \(=5.5\) millimole Total volume \(=55 \mathrm{ml}\). Molarity…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- Of the following molecules, which have shape similar to \(\mathrm{CO}_{2} ?\)WBJEE 2016 Medium
- The orange solid on heating gives a colourless gas and a green solid which can be reduced to metal by aluminium powder. The orange and the green solids are, respectivelyWBJEE 2013 Easy
- The difference between orbital angular momentum of an electron in a 4 f orbital and another electron in a 4 s orbital isWBJEE 2020 Medium
- The number of unpaired electrons in Ni (atomic number \(=28\) ) areWBJEE 2018 Easy
- The well known compounds, \((+)-\) lactic acid and \((-)-\) lactic acid, have the same molecular formula, \(\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}_{3}\). The correct relationship between them isWBJEE 2012 Medium
- During a reversible adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio \(\frac{C_{p}}{C_{V}}\) for the gas isWBJEE 2018 Hard
More PYQs from WBJEE
- If \(|z-25 i| \leq 15\), then Maximum \(\arg (z)-\) Minimum \(\arg (z)\) is equal toWBJEE 2022 Medium
- The values of \(a, b, c\) for which the function \(f(x)=\left\{\begin{array}{l}\frac{\sin (a+1) x+\sin x}{x}, x < 0 \\ c, x=0 \\ \frac{\left(x+b x^2\right)^{1 / 2}-\sqrt{x}}{b x^{1 / 2}}, x>0\end{array}\right.\) is continuous at \(x=0\), areWBJEE 2022 Medium
- The correct statement(s) about \(\mathrm{B}_2 \mathrm{H}_6\) is / are :WBJEE 2022 Easy
- The domain of definition of the function \(f(x)=\sqrt{1+\log _{\mathrm{e}}(1-x)}\) isWBJEE 2009 Easy
- The expression \(\cos ^2 \phi+\cos ^2(\theta+\phi)-2 \cos \theta \cos \phi \cos (\theta+\phi)\) isWBJEE 2024 Easy
- Let \([x]\) denote the greatest integer less than or equal to \(x\), then the value of the integral \(\int_{-1}^{1}(|x|-2[x]) d x\) is equal toWBJEE 2012 Medium