MCQOPTIONS
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MCQOPTIONS
This section includes 1262 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 301. |
First organic compound synthesized in laboratory was _________________? |
| A. | tartaric acid |
| B. | ethyl alcohol |
| C. | methanol |
| D. | urea |
| Answer» E. | |
| 302. |
Isomerism which is present only in alkene is__________________? |
| A. | structural isomerism |
| B. | metamerism |
| C. | cis-trans isomerism |
| D. | both b and c |
| Answer» D. both b and c | |
| 303. |
Which one of the following is not a good leaving group ? |
| A. | HSO4- |
| B. | Cl- |
| C. | OH- |
| D. | Br- |
| Answer» D. Br- | |
| 304. |
Compound containing benzene ring in their structure are __________________? |
| A. | aliphatic |
| B. | aromatic |
| C. | carboxylic acid |
| D. | carbohydrates |
| Answer» C. carboxylic acid | |
| 305. |
A double bond consists of __________________? |
| A. | Two sigma bonds |
| B. | Two Pi bonds |
| C. | One sigma and one Pi bonds |
| D. | One sigma and two Pi bonds |
| Answer» D. One sigma and two Pi bonds | |
| 306. |
Octane number 2 2 4-trimethyl pentane is__________________? |
| A. | 100 |
| B. | 90 |
| C. | 80 |
| D. | 70 |
| Answer» B. 90 | |
| 307. |
In the complex [Cr(OH)3(H2O)3] the coordination number is __________________? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» E. | |
| 308. |
The process of fermentation involves all the enzymes except__________________? |
| A. | Diastase |
| B. | Invertase |
| C. | Zymase |
| D. | Sucrase |
| Answer» E. | |
| 309. |
Geometric isomerism is usually found in___________________? |
| A. | Alkanes |
| B. | Alkenes |
| C. | Alkynes |
| D. | Esters |
| Answer» C. Alkynes | |
| 310. |
According to vital force theory_______________? |
| A. | organic compounds can be synthesized from inorganic compounds |
| B. | organic compounds cannot be synthesized from inorganic compounds |
| C. | organic compounds can be synthesized by animals |
| D. | organic compounds can be synthesized by plants |
| Answer» C. organic compounds can be synthesized by animals | |
| 311. |
Organic compounds that are essentially nonpolar and exhibit weak intermolecular forces have________________? |
| A. | Low melting points |
| B. | Low vapour pressure |
| C. | High boiling points |
| D. | High electrical conductivity |
| Answer» B. Low vapour pressure | |
| 312. |
Which is true about Zn-Cu galvanic cell ? |
| A. | Reduction occurs at anode |
| B. | K+ ion transfer from salt bridge to left beaker of ZnSO4 |
| C. | Oxidation occurs at cathode |
| D. | Anode is negatively charged |
| Answer» E. | |
| 313. |
Vinyl acetylene combines with hydrochloric acid produces___________________? |
| A. | Diviny1 acetylene |
| B. | Ethylidine dichloride |
| C. | Chloroprene |
| D. | 1 – 3 – 3 – trichloro butane |
| Answer» D. 1 – 3 – 3 – trichloro butane | |
| 314. |
Nitrates of which pair gives different products on thermal decomposition___________________? |
| A. | Na K |
| B. | Mg Ca |
| C. | Li Na |
| D. | Li Ca |
| Answer» D. Li Ca | |
| 315. |
When toluene reacts with chlorine in sunlight the first major product is__________________? |
| A. | Benzy1 chloride |
| B. | Benzal dichloride |
| C. | O-chlorotoluene |
| D. | O-chlorotoluene and P-chlorotoluene |
| Answer» B. Benzal dichloride | |
| 316. |
The number of atoms in a molecule determines________________? |
| A. | macromolecule |
| B. | macromolecule |
| C. | molecularity |
| D. | atomicity |
| Answer» E. | |
| 317. |
A safe and more reliable method for drying the crystal is__________________? |
| A. | Hot air currents |
| B. | folds of filter paper |
| C. | oven |
| D. | Vacuum desiccator |
| Answer» E. | |
| 318. |
Which of the following can be used in laptops ? |
| A. | Silver oxide battery |
| B. | Fuel cell |
| C. | Nickel cadmium cell |
| D. | Lead accumulator |
| Answer» D. Lead accumulator | |
| 319. |
Chlorination of water may be harmful if the water contains_________________? |
| A. | Ammonia |
| B. | Dissolved oxygen |
| C. | Carbon dioxide |
| D. | All |
| Answer» D. All | |
| 320. |
When benzene is heated in air with V2O5 at 450°C yields_________________? |
| A. | Phenol |
| B. | Maleic anhydride |
| C. | Glyoxal |
| D. | Benzoic acid |
| Answer» C. Glyoxal | |
| 321. |
Which one of the following looks odd__________________? |
| A. | H2SO4 |
| B. | KMnO4 |
| C. | H2S |
| D. | K2CrO4 |
| Answer» D. K2CrO4 | |
| 322. |
A limiting reactant is one which________________? |
| A. | is taken in lesser quantity in grams as compared to other reactants |
| B. | is taken in lesser quantity in volume as compared to other reactants |
| C. | gives the maximum amount of the product which is required |
| D. | gives the minimum amount of the product under consideration |
| Answer» E. | |
| 323. |
When CO2 is made to react with ethy1 magnesium iodide in dry ether followed by acid hydrolysis yields______________? |
| A. | Carboxylic acid |
| B. | Ethanoic acid |
| C. | Propanoic acid |
| D. | Butanoic acid |
| Answer» D. Butanoic acid | |
| 324. |
For a given process the heat changes at constant pressure (qp) and at constant volume (qv) are related to each other as___________________? |
| A. | qp = qv |
| B. | qp < qv |
| C. | qp > qv |
| D. | qp = qv / 2 |
| Answer» D. qp = qv / 2 | |
| 325. |
Solubility product of AgCl is 2.0 x 10-10 mol2 dm-6. Maximum Concentration of Ag+1 ions in the solution is__________________? |
| A. | 2.0 x 10-10 mol dm-3 |
| B. | 1.414 x 10-5 mol dm-3 |
| C. | 1.0 x 10-10 mol dm-3 |
| D. | 1.0 x 10-5 mol dm-3 |
| Answer» C. 1.0 x 10-10 mol dm-3 | |
| 326. |
Isotopes differs in______________________? |
| A. | arrangement of electrons in orbitals |
| B. | position in the periodic table |
| C. | properties depend upon mass |
| D. | chemical properties |
| Answer» E. | |
| 327. |
Which one of the following will be sulphonated readily ? |
| A. | Chlorobenzene |
| B. | Toluene |
| C. | Nitrobenzene |
| D. | Benzene |
| Answer» C. Nitrobenzene | |
| 328. |
Which of the following solution has the highest boiling point ? |
| A. | 5.85% NaCl Solution |
| B. | 18.0 % glucose solution |
| C. | 6.0 % urea solution |
| D. | All have same boiling point |
| Answer» B. 18.0 % glucose solution | |
| 329. |
The type of filtering media used for filtration depending upon____________________? |
| A. | Nature of reactants |
| B. | Nature of crucible |
| C. | Nature of product |
| D. | Nature of precipitate |
| Answer» E. | |
| 330. |
Which of the following elements react with steam to produce H2 gas? |
| A. | Pd |
| B. | Ni |
| C. | Sn |
| D. | All of the above |
| Answer» E. | |
| 331. |
Incomplete oxidation of methane in the limited supply of air forms ? |
| A. | CO2 and H2O |
| B. | CH3OH |
| C. | CO + H2 + C |
| D. | CO + H2O + C |
| Answer» C. CO + H2 + C | |
| 332. |
Which of the following set has all species isoelectronic__________________? |
| A. | F – Cl – Br |
| B. | Li+1 – Na+1 – K+1 |
| C. | F – Ne – Na+ |
| D. | H+ – H- – H |
| Answer» D. H+ – H- – H | |
| 333. |
Regular coiling or zigzagging of polypeptide through hydrogen bonding is its___________________? |
| A. | Quantum structure |
| B. | Secondary structure |
| C. | Tertiary structure |
| D. | Primary structure |
| Answer» C. Tertiary structure | |
| 334. |
The volume occupied by 1.4g CO at S.T.P is___________________? |
| A. | 22.4 dm³ |
| B. | 2.24 dm³ |
| C. | 1.12 cm³ |
| D. | 1.12 dm³ |
| Answer» E. | |
| 335. |
Water absorber used in combustion analysis is___________________? |
| A. | 50% KOH |
| B. | Lime water |
| C. | CaCl2 |
| D. | Mg (CIO4)2 |
| Answer» E. | |
| 336. |
All the transition elements show_________________? |
| A. | Similar physical properties |
| B. | Similar chemical properties |
| C. | Both A and b |
| D. | None |
| Answer» E. | |
| 337. |
The nucleus of an atom of every element will always contain____________________? |
| A. | neutrons |
| B. | protons and electrons |
| C. | protons |
| D. | protons and neutrons |
| Answer» D. protons and neutrons | |
| 338. |
A method of separation of components from its solution using Distribution law is ___________________? |
| A. | Sublimation |
| B. | Crystallisation |
| C. | Solvent extraction |
| D. | Distillation |
| Answer» D. Distillation | |
| 339. |
In solids the temperature is the measure of__________________? |
| A. | Average kinetic energy of molecules |
| B. | Vibrational kinetic energy |
| C. | Translational kinetic energy |
| D. | None of the above |
| Answer» C. Translational kinetic energy | |
| 340. |
When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show ? |
| A. | phenol is unsaturated |
| B. | 2-bromophenol is insoluble in water |
| C. | a hydroxy group makes the benzene ring more susceptible to electrophilic attack |
| D. | acid-base reaction |
| Answer» D. acid-base reaction | |
| 341. |
Consider the following redox reaction. Zn+dil HNO3? Zn (NO3)2 + N2O + H2O The coefficient number of HNO3 in the equation is__________________? |
| A. | 6 |
| B. | 8 |
| C. | 10 |
| D. | 4 |
| Answer» D. 4 | |
| 342. |
If a graph is plotted between temperature on x-axis and volume on y-axis for 1 mole of gas then we get straight line which cuts the temperature exis at________________? |
| A. | 0?C |
| B. | 273.16K |
| C. | ?273.16 K |
| D. | ?273.16?C |
| Answer» E. | |
| 343. |
Which of the following element doesnot show allotropy_________________? |
| A. | Carbon |
| B. | Arsenic |
| C. | Nitrogen |
| D. | Sulphur |
| Answer» D. Sulphur | |
| 344. |
Distance at which attractive forces of hydrogen overcome repulsive forces is __________ ? |
| A. | 75.2pm |
| B. | 75.3pm |
| C. | 75.5pm |
| D. | 75.4pm |
| Answer» E. | |
| 345. |
Fruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal ? |
| A. | aluminium can be recycled |
| B. | aluminium has very low density |
| C. | aluminium is the most abundant metal in the earth crust |
| D. | aluminium is resistant to corrosion by organic acids |
| Answer» E. | |
| 346. |
On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________? |
| A. | pink |
| B. | black |
| C. | yellow |
| D. | brick red |
| Answer» E. | |
| 347. |
Which of the following theories is superior to others__________________? |
| A. | VSEPR |
| B. | VBT |
| C. | MOT |
| D. | none of the above |
| Answer» D. none of the above | |
| 348. |
Avogadros number may represent_________________? |
| A. | volume of particles |
| B. | number of particles |
| C. | mass of particles |
| D. | All of the above |
| Answer» E. | |
| 349. |
The hardest of the following solids is__________________? |
| A. | sodium |
| B. | diamond |
| C. | graphite |
| D. | magnesium |
| Answer» C. graphite | |
| 350. |
Metallic crystals are soluble in________________? |
| A. | Polar solvent |
| B. | Non polar solvent |
| C. | Fused metal |
| D. | None |
| Answer» D. None | |