MCQOPTIONS
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MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A solution of 10 ml \[\frac{M}{10}FeS{{O}_{4}}\]was titrated with \[KMn{{O}_{4}}\]solution in acidic medium. The amount of \[KMn{{O}_{4}}\]used will be [CPMT 1984] |
| A. | 5 ml of 0.1 M |
| B. | 10 ml of 1.1 M |
| C. | 10 ml of 0.5 M |
| D. | 10 ml of 0.02 M |
| Answer» E. | |
| 2. |
A compound possesses 8% sulphur by mass. The least molecular mass is [AIIMS 2002] |
| A. | 200 |
| B. | 400 |
| C. | 155 |
| D. | 355 |
| Answer» C. 155 | |
| 3. |
Mixture of sand and sulphur may best be separated by [Kerala CET2001] |
| A. | Fractional crystallisation from aqueous solution |
| B. | Magnetic method |
| C. | Fractional distillation |
| D. | Dissolving in \[C{{S}_{2}}\] and filtering |
| Answer» E. | |
| 4. |
The ratio of the molar amounts of \[{{H}_{2}}S\] needed to precipitate the metal ions from \[20mL\] each of \[1M\ Cd{{(N{{O}_{3}})}_{2}}\] and \[0.5M\ CuS{{O}_{4}}\] is [CPMT 1997] |
| A. | 0.042361111111111 |
| B. | 0.084027777777778 |
| C. | 0.043055555555556 |
| D. | Indefinite |
| Answer» C. 0.043055555555556 | |
| 5. |
Haemoglobin contains 0.33% of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (At. wt. of Fe = 56) present in one molecule of haemoglobin is [CBSE PMT 1998] |
| A. | 6 |
| B. | 1 |
| C. | 4 |
| D. | 2 |
| Answer» D. 2 | |
| 6. |
On electrical decomposition of 150 ml dry and pure \[{{O}_{2}}\], 10% of \[{{O}_{2}}\]gets changed to O, then the volume of gaseous mixture after reaction and volume of remaining gas left after passing in turpentine oil will be |
| A. | 145 ml |
| B. | 149 ml |
| C. | 128 ml |
| D. | 125 ml |
| Answer» B. 149 ml | |
| 7. |
An electric discharge is passed through a mixture containing 50 c.c. of \[{{O}_{2}}\]and 50 c.c. of \[{{H}_{2}}\]. The volume of the gases formed (i) at room temperature and (ii) at 1100C will be |
| A. | (i) 25 c.c. (ii) 50 c.c. |
| B. | (i) 50 c.c. (ii) 75 c.c. |
| C. | (i) 25 c.c. (ii) 75 c.c. |
| D. | (i) 75 c.c. (ii) 75 c.c. |
| Answer» D. (i) 75 c.c. (ii) 75 c.c. | |
| 8. |
Which of the following cannot give iodometric titrations [AIIMS 1997] |
| A. | \[F{{e}^{3+}}\] |
| B. | \[C{{u}^{2+}}\] |
| C. | \[P{{b}^{2+}}\] |
| D. | \[A{{g}^{+}}\] |
| Answer» D. \[A{{g}^{+}}\] | |
| 9. |
When 100 ml of 1\[M\,NaOH\]solution and 10 ml of 10\[N\,{{H}_{2}}S{{O}_{4}}\]solution are mixed together, the resulting solution will be [DPMT 1982] |
| A. | Alkaline |
| B. | Acidic |
| C. | Strongly acidic |
| D. | Neutral |
| Answer» E. | |
| 10. |
Equivalent weight of a bivalent metal is 37.2. The molecular weight of its chloride is [MH CET 2003] |
| A. | 412.2 |
| B. | 216 |
| C. | 145.4 |
| D. | 108.2 |
| Answer» D. 108.2 | |
| 11. |
The number of molecules in \[8.96\ L\] of a gas at \[{{0}^{o}}C\] and 1 atmosphere pressure is approximately [BHU 1993] |
| A. | \[6.02\times {{10}^{23}}\] |
| B. | \[12.04\times {{10}^{23}}\] |
| C. | \[18.06\times {{10}^{23}}\] |
| D. | \[24.08\times {{10}^{22}}\] |
| Answer» E. | |
| 12. |
Which of the following has least mass [Pb. PET1985] |
| A. | \[2\ g\] atom of nitrogen |
| B. | \[3\times {{10}^{23}}\] atoms of \[C\] |
| C. | 1 mole of \[S\] |
| D. | \[7.0\ g\] of \[Ag\] |
| Answer» C. 1 mole of \[S\] | |
| 13. |
The element whose a atom has mass of \[10.86\times {{10}^{-26}}\]kg is |
| A. | Boron |
| B. | Calcium |
| C. | Silver |
| D. | Zinc |
| Answer» E. | |
| 14. |
What is the weight of oxygen required for the complete combustion of 2.8 kg of ethylene[CBSE PMT 1989] |
| A. | 2.8 kg |
| B. | 6.4 kg |
| C. | 9.6 kg |
| D. | 96 kg |
| Answer» C. 9.6 kg | |
| 15. |
The number of molecule at NTP in 1 ml of an ideal gas will be |
| A. | \[6\times {{10}^{23}}\] |
| B. | \[2.69\times {{10}^{19}}\] |
| C. | \[2.69\times {{10}^{23}}\] |
| D. | None of these |
| Answer» C. \[2.69\times {{10}^{23}}\] | |
| 16. |
1.520 g of the hydroxide of a metal on ignition gave0.995 gm of oxide. The equivalent weight of metal is [DPMT 1984] |
| A. | 1.52 |
| B. | 0.995 |
| C. | 19 |
| D. | 9 |
| Answer» E. | |