LIST-I | LIST-II | ||
---|---|---|---|
I | \(\text{H}_2\text{O}_2\) | P | \(\text{Mg(HCO}_3\text{)}_2 + \text{Ca(OH)}_2 \rightarrow \) |
II | \(\mathrm{Mg(OH)_2}\) | Q | \(\text{BaO}_2 + \text{H}_2\text{SO}_4 \rightarrow \) |
III | \(\text{BaCl}_2\) | R | \(\text{Ca(OH)}_2 + \text{MgCl}_2 \) |
IV | \(\text{CaCO}_3\) | S | \(\text{BaO}_2 + 2\text{HCl} \rightarrow\) |
T | \(\text{Ca(HCO}_3\text{)}_2 + 2\text{Ca(OH)}_2 \rightarrow \) |
I → Q; II → P; III → S; IV → R
I → T; II → P; III → Q; IV → R
I → T; II → R; III → Q; IV → P
I → Q; II → R; III → S; IV → P
The formation of hydrogen peroxide (\( \text{H}_2\text{O}_2 \)) happens by the reaction between \( \text{BaO}_2 \) and \( \text{H}_2\text{SO}_4 \).
This corresponds to reaction Q.
The formation of magnesium hydroxide (\( \text{Mg(OH)}_2 \)) occurs when \( \text{Ca(OH)}_2 \) reacts with \( \text{MgCl}_2 \).
This corresponds to reaction R.
Barium chloride (\( \text{BaCl}_2 \)) reacts with hydrochloric acid to form barium peroxide (\( \text{BaO}_2 \)), which corresponds to reaction S.
Calcium carbonate (\( \text{CaCO}_3 \)) is formed when \( \text{Mg(HCO}_3\text{)}_2 \) reacts with \( \text{Ca(OH)}_2 \), corresponding to reaction P.
The correct matches are:
The correct option is A: I → Q; II → R; III → S; IV → P.
A current of 2 A is passed through molten CaCl\(_2\) for 1930 seconds. What is the mass of calcium deposited at the cathode? (Ca molar mass = 40 g/mol, valency = 2, Faraday's constant = 96500 C/mol)
Two identical concave mirrors each of focal length $ f $ are facing each other as shown. A glass slab of thickness $ t $ and refractive index $ n_0 $ is placed equidistant from both mirrors on the principal axis. A monochromatic point source $ S $ is placed at the center of the slab. For the image to be formed on $ S $ itself, which of the following distances between the two mirrors is/are correct: