MCQOPTIONS
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MCQOPTIONS
This section includes 200950 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 2351. |
The radius of an atomic nucleus is of the order of? |
| A. | 10-10cm |
| B. | 10-8cm |
| C. | 10-13cm |
| D. | 10-15cm |
| Answer» D. 10-15cm | |
| 2352. |
The radiation from a naturally occurring radioactive substance, as seen after deflection by a magnetic field in one direction, are: |
| A. | definitely alpha rays |
| B. | definitely beta rays |
| C. | both alpha and beta rays |
| D. | either alpha or beta rays |
| Answer» E. | |
| 2353. |
Rutherford’s scattering experiment is related to the size of the? |
| A. | Atom |
| B. | Nucleus |
| C. | Electron |
| D. | Neutron |
| Answer» C. Electron | |
| 2354. |
a catalyst is a substance which_______. |
| A. | increases the equilibrium concentration of the product |
| B. | increases the equilibrium constant of the reaction |
| C. | supplies energy to the reaction |
| D. | shortens the time to reach equilibrium |
| Answer» E. | |
| 2355. |
The pair of compounds which cannot exist together in solution is? |
| A. | NaHCO3 and NaOH |
| B. | Na2CO3 and NaHCO3 |
| C. | Na2CO3 and NaOH |
| D. | NaHCO3 and NaCl |
| Answer» B. Na2CO3 and NaHCO3 | |
| 2356. |
One molal solution is one that contains one mole of a solute in? |
| A. | 1000 g of the solvent |
| B. | One litre of solvent |
| C. | One litre of the solution |
| D. | 22.4 litres of the solution |
| Answer» B. One litre of solvent | |
| 2357. |
The rate constant of a first order reaction depends on the? |
| A. | Temperature |
| B. | Time |
| C. | Concentration of the reactant |
| D. | Concentration of the product |
| Answer» B. Time | |
| 2358. |
For a dilute solution, Raoult’s law states that? |
| A. | The lowering of vapour pressure is equal to the mole fraction of solute |
| B. | The relative lowering of vapour pressure is equal to the mole fraction of solute |
| C. | The relative lowering of vapour pressure is proportional amount of solute in the solution. |
| D. | The vapour pressure of the solution is equal to the mole fraction of solvent |
| Answer» C. The relative lowering of vapour pressure is proportional amount of solute in the solution. | |
| 2359. |
A solution containing one mole for litre each of Cu(NO3)2, AgNO3, Hg2(NO3)2 and Mg(NO3)2 is electrolysed using inert electrodes.Standard electrode potentials in volts (reduction potentials) are:Ag | Ag = 0.80Hg22 |Hg = 0.79Cu2 |Cu = 0.34nMg2 |Mg = -2.37 |
| A. | Ag,Hg,Cu, Mg |
| B. | Mg,Cu,Hg,Ag |
| C. | Ag,Hg, Cu |
| D. | Cu,Hg, Ag |
| Answer» D. Cu,Hg, Ag | |
| 2360. |
The electric charge or electrode deposition of one gram equivalent of a substance is? |
| A. | One ampere for one second |
| B. | 96,500 coulombs per second |
| C. | One ampere for one hour |
| D. | Charge on one mole of electrons |
| Answer» E. | |
| 2361. |
The reaction ½ H2(g) AgCl(s) = H (aq) Cl-(aq) Ag(s) occurs in the galvanic cell? |
| A. | Ag|AgCl(s) |KCl(soln) |AgNO3(soln) |Ag |
| B. | Pt|H2(g) |HCl(soln) |AgNO3(soln) |Ag |
| C. | Pt|H2(g) |HCl(soln) |AgCl(s) |Ag |
| D. | Pt|H2(g) |KCl(soln) |AgCl(s) |Ag |
| Answer» D. Pt|H2(g) |KCl(soln) |AgCl(s) |Ag | |
| 2362. |
Faraday’s laws of electrolysis are related to the? |
| A. | Atomic number of the cation. |
| B. | Atomic number of the anion |
| C. | Equivalent weight of the electrolyte |
| D. | Speed of the cation |
| Answer» D. Speed of the cation | |
| 2363. |
A certain buffer solution contains equal concentration of X- and HX. The Kb for X- is 10-10. The pH of the buffer is? |
| A. | 4 |
| B. | 7 |
| C. | 10 |
| D. | 14 |
| Answer» B. 7 | |
| 2364. |
The bonds present in N2O5 are ______ |
| A. | Only ionic |
| B. | Covalent and coordinate |
| C. | Only covalent |
| D. | Covalent and ionic |
| Answer» C. Only covalent | |
| 2365. |
The bond between two identical non-metal atoms has a pair of electrons? |
| A. | Unequally shared between the two. |
| B. | Transferred fully from one atom to another |
| C. | With identical spins |
| D. | Equally shared between them |
| Answer» E. | |
| 2366. |
carbon tetrachloride has no net dipole moment because of? |
| A. | Its planar structure |
| B. | Its regular tetrahedral structure |
| C. | Similar sizes of carbon and chlorine atoms |
| D. | Similar electron affinities of carbon and chlorine |
| Answer» C. Similar sizes of carbon and chlorine atoms | |
| 2367. |
The principal quantum number of an atom is related to the? |
| A. | Size of the orbital |
| B. | Spin angular momentum |
| C. | Orbital angular momentum |
| D. | Orientation of the orbital in space |
| Answer» B. Spin angular momentum | |
| 2368. |
The element with the highest first ionization potential is? |
| A. | Boron |
| B. | Carbon |
| C. | Nitrogen |
| D. | Oxygen |
| Answer» D. Oxygen | |
| 2369. |
Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is? |
| A. | Same as that of a hydrogen molecule |
| B. | Two times that of a hydrogen molecule |
| C. | Four times that of a hydrogen molecule |
| D. | Half that of a hydrogen molecule |
| Answer» B. Two times that of a hydrogen molecule | |
| 2370. |
Rate of diffusion of a gas is? |
| A. | Directly proportional to its density |
| B. | Directly proportional t its molecular weight |
| C. | Directly proportional to the square root of its molecular weight |
| D. | Indirectly proportional to the square root of its molecular weight |
| Answer» E. | |
| 2371. |
The average velocity of an ideal gas molecule at 27°C is 0.3 m/s. The average speed at 927°C will be: |
| A. | 0.6 m/s |
| B. | 0.3 m/s |
| C. | 0.9 m/s |
| D. | 3.0 m/s |
| Answer» B. 0.3 m/s | |
| 2372. |
Among the following, the molecule that is linear is? |
| A. | CO2 |
| B. | NO2 |
| C. | SO2 |
| D. | ClO2 |
| Answer» B. NO2 | |
| 2373. |
A liquid is in equilibrium with its vapour at its boiling point. On average, the molecules in the two phases have equal? |
| A. | Inter-molecular forces |
| B. | Potential energy |
| C. | Kinetic energy |
| D. | Temperature |
| Answer» E. | |
| 2374. |
Any p-orbital can accommodate up to? |
| A. | Four electrons |
| B. | Two electrons in parallel groups |
| C. | Six electrons |
| D. | Two electrons with opposite spins |
| Answer» E. | |
| 2375. |
The oxidation number of carbon in CH2O is? |
| A. | -2 |
| B. | +2 |
| C. | 0 |
| D. | +4 |
| Answer» D. +4 | |
| 2376. |
The compound that is not a Lewis acid is? |
| A. | BF3 |
| B. | AlCl3 |
| C. | BeCl2 |
| D. | SnCl4 |
| Answer» D. SnCl4 | |
| 2377. |
The compound whose 0.1 M solution is basic is? |
| A. | Ammonium acetate |
| B. | Ammonium chloride |
| C. | Ammonium sulphate |
| D. | Sodium acetate |
| Answer» E. | |
| 2378. |
A certain weak acid has a dissociation constant of 1.0*10-4. The equilibrium constant for its reaction with a strong base is? |
| A. | 1.0*10-4 |
| B. | 1.0*10-10 |
| C. | 1.0*1010 |
| D. | 1.0*1014 |
| Answer» D. 1.0*1014 | |
| 2379. |
The conjugate acid of NH2- is? |
| A. | NH3 |
| B. | NH4OH |
| C. | NH4+ |
| D. | N2H4 |
| Answer» B. NH4OH | |
| 2380. |
A certain buffer solution contains equal concentration of X- and HX. The Kb for X- a 4 b 7 c 10 d 14 4 |
| A. | 4 |
| B. | 7 |
| C. | 10 |
| D. | 14 |
| Answer» B. 7 | |
| 2381. |
For the reactionPCl5 (g) ↔ PCl3 (g) Cl2 (g) |
| A. | introducing an inert gas at constant volume. |
| B. | introducing chlorine gas at constant volume |
| C. | introducing an inert gas at constant pressure. |
| D. | introducing PCl5 at constant volume. |
| Answer» E. | |
| 2382. |
The bonds present in N2O5 are ______. |
| A. | only ionic |
| B. | covalent and coordinate |
| C. | only covalent |
| D. | covalent and ionic |
| Answer» C. only covalent | |
| 2383. |
When NaNO3 is heated in a closed vessel, oxygen is liberated and NaNO2 is left behind. At equilibrium______. |
| A. | addition of NaNO2 favours reverse reaction. |
| B. | addition of NaNO3 favours forward reaction. |
| C. | increasing temperature favours forward reaction. |
| D. | increasing temperature favours reverse reaction. |
| Answer» D. increasing temperature favours reverse reaction. | |
| 2384. |
The ion that cannot be precipitated by both HCl and H2S is? |
| A. | Pb2+ |
| B. | Ag+ |
| C. | Cu+ |
| D. | Sn2+ |
| Answer» E. | |
| 2385. |
The molecule having one unpaired electron is? |
| A. | NO |
| B. | CO |
| C. | CN- |
| D. | O2 |
| Answer» B. CO | |
| 2386. |
On hybridization of one s and one p orbitals we get? |
| A. | Two mutually perpendicular orbitals |
| B. | Two orbital at 180° |
| C. | Four orbitals directed tetrahedrally |
| D. | Three orbital in a plane |
| Answer» C. Four orbitals directed tetrahedrally | |
| 2387. |
The hybridization of sulphur dioxide is? |
| A. | sp |
| B. | sp² |
| C. | dsp² |
| D. | sp³ |
| Answer» C. dsp² | |
| 2388. |
The bond between two identical non-metal atoms has a pair of electrons____. |
| A. | unequally shared between the two. |
| B. | transferred fully from one atom to another |
| C. | with identical spins |
| D. | equally shared between them |
| Answer» E. | |
| 2389. |
The types of bonds present in CuSO4.5H2O are only_____. |
| A. | electrovalent and covalent |
| B. | electrovalent and coordinate covalent |
| C. | electrovalent, covalent and coordinate covalent |
| D. | covalent and coordinate covalent |
| Answer» D. covalent and coordinate covalent | |
| 2390. |
The hydrogen bond is strongest in? |
| A. | O-H…S |
| B. | S-H…O |
| C. | F-H…S |
| D. | . F-H...O |
| Answer» D. . F-H...O | |
| 2391. |
carbon tetrachloride has no net dipole moment because of____. |
| A. | its planar structure |
| B. | its regular tetrahedral structure |
| C. | similar sizes of carbon and chlorine atoms |
| D. | similar electron affinities of carbon and chlorine |
| Answer» C. similar sizes of carbon and chlorine atoms | |
| 2392. |
The ion that isoelectronic with CO is? |
| A. | CN- |
| B. | O2+ |
| C. | O2- |
| D. | N2+ |
| Answer» B. O2+ | |
| 2393. |
A mixture of benzaldehyde and formaldehyde on heating with acqueous NaOH solution gives_____. |
| A. | benzyl alcohol and sodium formate |
| B. | sodium benzoate and methyl alcohol |
| C. | sodium benzoate and sodium formate |
| D. | benzyl alcohol and methyl alcohol |
| Answer» B. sodium benzoate and methyl alcohol | |
| 2394. |
Bohr model can explain? |
| A. | The spectrum of hydrogen atom only |
| B. | Spectrum of an atom or ion containing one electron only. |
| C. | The spectrum o hydrogen molecule |
| D. | The solar spectrum |
| Answer» C. The spectrum o hydrogen molecule | |
| 2395. |
6 4 × 4? |
| A. | 18 |
| B. | 24 |
| C. | 20 |
| D. | 22 |
| Answer» E. | |
| 2396. |
Simplify 1+(2+5)2=? |
| A. | 50 |
| B. | 25 |
| C. | 60 |
| D. | 31 |
| Answer» B. 25 | |
| 2397. |
Correct set of four quantum numbers for the valence (outmost) electron of rubidium 9Z = 37) is: |
| A. | 5,0,0,+1/2 |
| B. | 5,1,0, +1/2 |
| C. | 5,1,1,+1/2 |
| D. | 6,0,0,+1/2 |
| Answer» B. 5,1,0, +1/2 | |
| 2398. |
The principal quantum number of an atom is related to the_____. |
| A. | size of the orbital |
| B. | spin angular momentum |
| C. | orbital angular momentum |
| D. | orientation of the orbital in space |
| Answer» B. spin angular momentum | |
| 2399. |
Any p-orbital can accommodate up to______. |
| A. | Four electrons |
| B. | Two electrons in parallel groups |
| C. | Six electrons |
| D. | Two electrons with opposite spins |
| Answer» D. Two electrons with opposite spins | |
| 2400. |
The molecular formula of phosphorous is? |
| A. | P1 |
| B. | P2 |
| C. | P3 |
| D. | P4 |
| Answer» E. | |