AP EAMCET201822 Apr 2018Evening ShiftChemistryHydrogenActual
Identify the correct statements from the following. (i) Zn reacts with dilute HCl and aqueous NaOH solution separately and liberates hydrogen. (ii) Ti and Zr form interstitial hydrides. iii) The viscosity of H ₂ O is more than the viscosity of D ₂ O .
Options
- A(i), (ii), (iii)
- B(i), (iii)
- C(i), (ii)
- D(ii), (iii)
Correct answer
C. (i), (ii)
Step-by-step solution
aligned & (i) Zn (s)+2 HCl (a q) & Zn ²⁺(a q)+2 Cl ⁻(a q)+ H ₂(g) & aligned Zn comes into contact with HCl acid. It replaces the hydrogen from HCl molecule. Zn ( s )+2 HCl ZnCl ₂+ H ₂ (ii) Hydrides are classified into three categories, according to the nature of their bonding. Saline hydrides have a covalent bond, interstitial hydrides have a metallic bond and d -block elements make interstitial hydrides. (iii) Viscosity of H ₂ O is more than the viscosity of D ₂ O . This statement is wrong.