JEE MAIN, AIPMT, Chemistry Question Papers – MCQs Test 25
Sr. No. |
Question |
Answer |
|
1. |
When KBr is dissolved in water, K+ ions are (A) oxidised (B) reduced (C) hydrolysed (D) hydrated |
Answer: (D) |
|
2. |
When sulphur dioxide is passed in an acidified K2Cr2 O7 solution, the oxidation state of sulphur is changed from (A) + 4 to 0 (B) + 4 to + 2 (C) + 4 to + 6 (D) + 6 to + 4 |
Answer: (C) |
|
3. |
When the azimuthal quantum number has the value of 2, the number of orbitals possible are (A) 7 (B) 5 (C) 3 (D) O |
Answer: (B) |
|
4. |
Which complex can not ionise in solution? (A) [Pt(NH3)6] Cl4 (B) K2[pt(F6)] (C) K4[Fe(CN)6] (D) [CoCl3(NH3)3] |
Answer: (D) |
|
5. |
Which is the most easily liquifiable rare gas? (A) Xe (B) Kr (C) Ar (D) Ne |
Answer: (A) |
|
6. |
Which metal has a greater tendency to form metal oxide? (A) Cr (B) Fe (C) Al (D) Ca |
Answer: (D) |
|
7. |
Which of the following can be measured by the Ostwald-Walker dynamic method (A) Relative lowering of vapour pressure (B) Lowering of vapour pressure (C) Vapour pressure of the solvent (D) all of these |
Answer: (A) |
|
8. |
Which of the following compounds has the lowest melting point? (A) CaF2 (B) CaCl2 (C) CaBr2 (D) CaI2 |
Answer: (D) |
|
9. |
Which of the following electrolytic solutions has the least specific conductance? (A) 0.02 N (B) 0.2 N (C) 2 N (D) 0.002 N |
Answer: (D) |
|
10. |
Which of the following elements is present as the impurity to the maximum extent in the pig iron? (A) Phosphorus (B) Manganese (C) Carbon (D) Silicon |
Answer: (C) |