AP EAMCET · Chemistry · General Principles and Processes of Isolation of Metals
Which of the following statements is not correct?
(i) Froth-floatation is used for removing gangue from sulphide ore.
(ii) Cresols are used to stabilise the froth.
(iii) Sodium cyanide can be used as depressant for preferential separation.
(iv) Aniline can be used as froth enhancer.
- A (i)
- B (ii)
- C (iii)
- D (iv)
Answer & Solution
Correct Answer
(D) (iv)
Step-by-step Solution
Detailed explanation
Froth-flotation is a process for selectively separating hydrophobic materials from hydrophilic. This is used in mineral processing, paper recycling and waste water. Aniline or cresols are added to stabilise the froth, not for froth enhancer. Hence, the correct option is (4).
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
- Which of the following is not a RNA?AP EAMCET 2022 Easy
- The two reactions involved in the conversion of benzene diazonium chloride to diphenyl are respectivelyAP EAMCET 2024 Hard
- Shape of \(\mathrm{XeF}_4\) molecule isAP EAMCET 2021 Easy
- Which complex among the following has the highest value of spin only magnetic moment?
\(\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-},\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-},\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}\), \(\left[\mathrm{NiCl}_4\right]^{2-}\)AP EAMCET 2020 Medium - Which one of the following statement is not correct?AP EAMCET 2018 Medium
- The ratio of rates of diffusion of helium (He) to hydrogen \(\left(\mathrm{H}_2\right)\).AP EAMCET 2022 Easy
More PYQs from AP EAMCET
- The general solution of \(4 \cos 2 x-4 \sqrt{3} \sin 2 x+\cos 3 x-\) \(\sqrt{\sin 3 x+\cos x-\sqrt{3} \sin x}=0\)AP EAMCET 2024 Medium
- Statement (A) For an ideal liquid, the bulk modulus is infinite and the shear modulus is zero.
Statement (B) The volume contraction of a metal cube of bulk modulus \(140 \mathrm{GPa} .10 \mathrm{~cm}\) on a edge, when subjected to a hydraulic pressure of \(7 \times 10^6 \mathrm{~Pa}\) is \(-0.05 \mathrm{~m}^3\).
Statement (C) A spiral spring is stretched by a weight attached to it. The strain is tensile.AP EAMCET 2022 Medium - If , thenAP EAMCET 2021 Easy
- The arithmetic mean and standard deviation of a data of nine numbers are 13 and 5 respectively. If 3 is included as the 10th item of the data, then the variance of the data of ten number isAP EAMCET 2018 Medium
- The correct order of reactivity of hydrogen halides with ethyl alcohol isAP EAMCET 2008 Easy
- The number of elements in the set \(S=\{x \in \mathbb{Z}\) : \(x^2-7 x+6 \leq 0\) and \(\left.x^2-3 x>0\right\}\) isAP EAMCET 2023 Medium