Q. No.a. \(\mathrm{CaF}_2+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{CaSO}_4+2 \mathrm{HF}
\)
b. \(2 \mathrm{HI}+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{I}_2+\mathrm{SO}_2+2 \mathrm{H}_2 \mathrm{O}
\)
c. \(\mathrm{Cu}+2 \mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{CuSO}_4+\mathrm{SO}_2+2 \mathrm{H}_2 \mathrm{O}
\)
d. \(\mathrm{NaCl}+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{NaHSO}_4+\mathrm{HCl}\)
In which of the above-mentioned reactions does conc. \(\mathrm{H}_2 \mathrm{SO}_4\) act as an oxidising reagent?
1.
a and b
2.
b and c
3.
c and d
4.
a and d
b. \(2 \mathrm{HI}+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{I}_2+\mathrm{SO}_2+2 \mathrm{H}_2 \mathrm{O} \)
c. \(\mathrm{Cu}+2 \mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{CuSO}_4+\mathrm{SO}_2+2 \mathrm{H}_2 \mathrm{O} \)
d. \(\mathrm{NaCl}+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{NaHSO}_4+\mathrm{HCl}\)
In which of the above-mentioned reactions does conc. \(\mathrm{H}_2 \mathrm{SO}_4\) act as an oxidising reagent?
Which of the following statements is correct?
| 1. | Only type of interactions between particles of noble gases are due to weak dispersion forces. |
| 2. | Ionisation enthalpy of molecular oxygen is very high as compared to xenon. |
| 3. | Hydrolysis of XeF6 is a redox reaction. |
| 4. | Xenon fluorides are not reactive. |
Match the formulas of oxides given in Column I with the type of oxide given in Column II and mark the correct option.
| Column I | Column II |
| A. Pb3O4 | 1. Neutral oxide |
| B. N2O | 2. Acidic oxide |
| C. Mn2O7 | 3. Basic oxide |
| D. Bi2O3 | 4. Mixed oxide |
Codes
| A | B | C | D | |
| 1. | 1 | 2 | 3 | 4 |
| 2. | 4 | 1 | 2 | 3 |
| 3. | 3 | 2 | 4 | 1 |
| 4. | 4 | 3 | 1 | 2 |
Match the species given in Column I with the shape given in Column II and mark the correct option.
| Column I | Column II | ||
| A | Its partial hydrolysis does not change oxidation state of central atom. | 1 | He |
| B | It is used in modern diving apparatus. | 2 | XeF6 |
| C | It is used to provide inert atmosphere for filling electrical bulbs. | 3 | XeF4 |
| D | It's central atom is in sp3d2 hybridisation. | 4 | Ar |
Codes
| A | B | C | D | |
| 1. | 1 | 4 | 2 | 3 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 2 | 1 | 4 | 3 |
| 4. | 1 | 3 | 2 | 4 |
The bonding present in nitrogen molecules is:
1. \(p\pi-p\pi\)
2. \(p\pi-d\pi\)
3. \(d\pi-d\pi\)
4. Only sigma bond
Which of the following is true about reactivity of group 15 elements?
1. Stability of their hydrides increases down the group.
2. Higher oxides are acidic in nature.
3. All elements form pentahalides.
4. They do not react with metals.
The condition that does not exist in the Haber process
for the manufacturing of ammonia is:
1. Pressure (around 200 ×105 Pa)
2. Temperature (700 K)
3. Catalyst such as iron oxide.
4. Presence of inert gases.
Number of moles of copper used when
(i) Copper reacts with dilute nitric acid
(ii) Copper reacts with concentrated nitric acid
are respectively:-
1. 1,1
2. 1,3
3. 3,1
4. 3,3
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