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MCQOPTIONS
This section includes 11242 Mcqs, each offering curated multiple-choice questions to sharpen your Joint Entrance Exam - Main (JEE Main) knowledge and support exam preparation. Choose a topic below to get started.
| 6451. |
Which of the following is a basic dyes [Pb. PMT 1998; AFMC 2004] |
| A. | Congo Red |
| B. | Aniline Yellow |
| C. | Alizarin |
| D. | Indigo |
| Answer» C. Alizarin | |
| 6452. |
An example of anthraquinone dye is [Haryana CEET 1999] |
| A. | Alizarin |
| B. | Basic acid |
| C. | Methylene blue |
| D. | Phenolphthalein |
| Answer» B. Basic acid | |
| 6453. |
Which of the following is an azo dye [Delhi CEE 1996] |
| A. | Orange-I |
| B. | Phenolphthalein |
| C. | Malachite green |
| D. | Methylene blue |
| Answer» B. Phenolphthalein | |
| 6454. |
A dye imparts red colour on fabric. What colour of light was absorbed by the dye |
| A. | Blue |
| B. | Red |
| C. | Green |
| D. | Orange |
| Answer» D. Orange | |
| 6455. |
Methyl orange is an indicator in acid-alkali titration. It gives |
| A. | Yellow colour in alkaline medium |
| B. | Red colour in acid medium |
| C. | Yellow colour in acid medium |
| D. | Yellow colour in alkaline medium and red colour in acid medium |
| Answer» E. | |
| 6456. |
Identify the wrong statement regarding alizarin |
| A. | Alizarin was extracted from the roots of the madder plant |
| B. | It's chemical name is 1, 2-dihydroxy anthraquinone |
| C. | It is fixed to fabrics by using mordants like aluminium sulphate giving fast red colour |
| D. | It has red crystal soluble in alkalies and the solution imparts red colour to fabrics |
| Answer» E. | |
| 6457. |
Which of the following structures represents a colourless substance |
| A. | \[{{C}_{6}}{{H}_{5}}-N=\underset{\underset{O}{\mathop{|}}\,}{\mathop{N}}\,-{{C}_{6}}{{H}_{5}}\] |
| B. | \[{{C}_{6}}{{H}_{5}}-N=N-{{C}_{6}}{{H}_{5}}\] |
| C. | \[{{C}_{6}}{{H}_{5}}-NH-NH-{{C}_{6}}{{H}_{5}}\] |
| D. | None of these |
| Answer» D. None of these | |
| 6458. |
Red ink is prepared from |
| A. | Phenol |
| B. | Aniline |
| C. | Congo red |
| D. | Eosin |
| Answer» E. | |
| 6459. |
Indigo shows cis-trans isomerism. Which is the stable form of Indigo |
| A. | Cis |
| B. | Trans |
| C. | Either cis or trans |
| D. | Both of the above |
| Answer» C. Either cis or trans | |
| 6460. |
Fluorescin, a well known dye is obtained by the reactions of |
| A. | Phthalic anhydride and phenol |
| B. | Phthalic anhydride and resorcinol |
| C. | Succinic acid and resorcinol |
| D. | Phthalic anhydride and catechol |
| Answer» C. Succinic acid and resorcinol | |
| 6461. |
Malachite green is a direct dye for silk and wool. It is prepared by condensing |
| A. | Benzaldehyde and dimethyl aniline |
| B. | Carbonyl chloride and dimethyl aniline |
| C. | Benzene diazonium chloride with dimethyl aniline |
| D. | None of the above |
| Answer» B. Carbonyl chloride and dimethyl aniline | |
| 6462. |
Which one is disperse dye |
| A. | Congo red |
| B. | Alizarin |
| C. | Celliton |
| D. | None of these |
| Answer» D. None of these | |
| 6463. |
The compounds used to fix a dye to the fabric is known as |
| A. | Mordant |
| B. | Azeotrope |
| C. | Bleaching agents |
| D. | Lake |
| Answer» B. Azeotrope | |
| 6464. |
Which of the following is not a chromophore |
| A. | \[-N=N-\] |
| B. | \[-NO\] |
| C. | \[-N{{O}_{2}}\] |
| D. | \[-N{{H}_{2}}\] |
| Answer» E. | |
| 6465. |
Which of the following is a vat dye and often used in dyeing jeans |
| A. | Indigo |
| B. | Alizarin |
| C. | Picric acid |
| D. | Crystal violet |
| Answer» B. Alizarin | |
| 6466. |
Which of the following is an example of basic dye |
| A. | Alizarin |
| B. | Malachite green |
| C. | Indigo |
| D. | Orange I |
| Answer» C. Indigo | |
| 6467. |
Which of the following is dye |
| A. | Methyl orange |
| B. | Orange I |
| C. | Aniline yellow |
| D. | All of these |
| Answer» E. | |
| 6468. |
The rose odour from an ester is formed by the action of HCOOH on |
| A. | Pine oil |
| B. | Olive oil |
| C. | Geraniol |
| D. | Turpentine oil |
| Answer» D. Turpentine oil | |
| 6469. |
An azo dye is fixed on fabrics by the process applicable in |
| A. | Vat dyes |
| B. | Mordant dyes |
| C. | Developed dyes |
| D. | Substantive dyes |
| Answer» D. Substantive dyes | |
| 6470. |
Minimum de-Broglie wavelength is associated with [RPMT 1999] |
| A. | Electron |
| B. | Proton |
| C. | \[C{{O}_{2}}\] molecule |
| D. | \[S{{O}_{2}}\] molecule |
| Answer» E. | |
| 6471. |
The de-Broglie wavelength of a particle with mass \[1gm\] and velocity \[100m/\sec \] is [CBSE PMT 1999; EAMCET 1997; AFMC 1999; AIIMS 2000] |
| A. | \[6.63\times {{10}^{-33}}m\] |
| B. | \[6.63\times {{10}^{-34}}m\] |
| C. | \[6.63\times {{10}^{-35}}m\] |
| D. | \[6.65\times {{10}^{-35}}m\] |
| Answer» B. \[6.63\times {{10}^{-34}}m\] | |
| 6472. |
de-Broglie equation is [MP PMT 1999; CET Pune 1998] |
| A. | \[n\lambda =2d\sin \theta \] |
| B. | \[E=hv\] |
| C. | \[E=m{{c}^{2}}\] |
| D. | \[\lambda =\frac{h}{mv}\] |
| Answer» E. | |
| 6473. |
Which of the following expressions gives the de-Broglie relationship [MP PMT 1996, 2004; MP PET/PMT 1998] |
| A. | \[h=\frac{\lambda }{mv}\] |
| B. | \[\lambda =\frac{h}{mv}\] |
| C. | \[\lambda =\frac{m}{hv}\] |
| D. | \[\lambda =\frac{v}{mh}\] |
| Answer» C. \[\lambda =\frac{m}{hv}\] | |
| 6474. |
In which one of the following pairs of experimental observations and phenomenon does the experimental observation correctly account for phenomenon [AIIMS 1983] |
| A. | Experimental observation -\[X\]-ray spectra Phenomenon-Charge on the nucleus |
| B. | Experimental observation -\[\alpha \]-particle scattering Phenomenon-Quantized electron orbit |
| C. | Experimental observation -Emission spectra Phenomenon-The quantization of energy |
| D. | Experimental observation -The photoelectric effect Phenomenon-The nuclear atom |
| Answer» D. Experimental observation -The photoelectric effect Phenomenon-The nuclear atom | |
| 6475. |
Which one of the following explains light both as a stream of particles and as wave motion [AIIMS 1983; IIT 1992; UPSEAT 2003] |
| A. | Diffraction |
| B. | \[\lambda =h/p\] |
| C. | Interference |
| D. | Photoelectric effect |
| Answer» C. Interference | |
| 6476. |
Among the following for which one mathematical expression \[\lambda =\frac{h}{p}\] stands |
| A. | De Broglie equation |
| B. | Einstein equation |
| C. | Uncertainty equation |
| D. | Bohr equation |
| Answer» B. Einstein equation | |
| 6477. |
The de-Broglie equation applies [MP PMT 2004] |
| A. | To electrons only |
| B. | To neutrons only |
| C. | To protons only |
| D. | All the material object in motion |
| Answer» E. | |
| 6478. |
The wave nature of an electron was first given by [CMC Vellore 1991; Pb. PMT 1998; CPMT 2004] |
| A. | De-Broglie |
| B. | Heisenberg |
| C. | Mosley |
| D. | Sommerfield |
| Answer» B. Heisenberg | |
| 6479. |
Calculate de-Broglie wavelength of an electron travelling at 1% of the speed of light [DPMT 2004] |
| A. | \[2.73\times {{10}^{-24}}\] |
| B. | \[2.42\times {{10}^{-10}}\] |
| C. | \[242.2\times {{10}^{10}}\] |
| D. | None of these |
| Answer» C. \[242.2\times {{10}^{10}}\] | |
| 6480. |
Dual nature of particles was proposed by [DCE 2004] |
| A. | Heisenberg |
| B. | Lowry |
| C. | de-Broglie |
| D. | Schrodinger |
| Answer» D. Schrodinger | |
| 6481. |
A cricket ball of \[0.5\,kg\] is moving with a velocity of \[100\,m/\sec \]. The wavelength associated with its motion is [DCE 2004] |
| A. | \[1/100cm\] |
| B. | \[6.6\times {{10}^{-34}}m\] |
| C. | \[1.32\times {{10}^{-35}}m\] |
| D. | \[6.6\times {{10}^{-28}}m\] |
| Answer» D. \[6.6\times {{10}^{-28}}m\] | |
| 6482. |
A 200g golf ball is moving with a speed of 5 m per hour. The associated wave length is \[(h=6.625\times {{10}^{-34}}J\text{-}sec)\] [MP PET 2003] |
| A. | \[{{10}^{-10}}\,m\] |
| B. | \[{{10}^{-20}}\,m\] |
| C. | \[{{10}^{-30}}\,m\] |
| D. | \[{{10}^{-40}}\,m\] |
| Answer» D. \[{{10}^{-40}}\,m\] | |
| 6483. |
If the velocity of hydrogen molecule is \[5\times {{10}^{4}}cm\,se{{c}^{-1}}\], then its de-Broglie wavelength is [MP PMT 2003] |
| A. | \[2\text{ }{AA}\] |
| B. | \[4{AA}\] |
| C. | \[8{AA}~\] |
| D. | \[100\text{ }{AA}\] |
| Answer» C. \[8{AA}~\] | |
| 6484. |
What is the de-Broglie wavelength associated with the hydrogen electron in its third orbit [AMU (Engg.) 2002] |
| A. | \[9.96\times {{10}^{-10}}cm\] |
| B. | \[9.96\times {{10}^{-8}}cm\] |
| C. | \[9.96\times {{10}^{4}}cm\] |
| D. | \[9.96\times {{10}^{8}}cm\] |
| Answer» C. \[9.96\times {{10}^{4}}cm\] | |
| 6485. |
The de-Broglie wavelength associated with a particle of mass \[{{10}^{-6}}kg\] moving with a velocity of \[10\,\,m{{s}^{-1}}\], is [AIIMS 2001] |
| A. | \[6.63\times {{10}^{-22}}m\] |
| B. | \[6.63\times {{10}^{-29}}\,m\] |
| C. | \[6.63\times {{10}^{-31}}\,m\] |
| D. | \[6.63\times {{10}^{-34}}\,m\] |
| Answer» C. \[6.63\times {{10}^{-31}}\,m\] | |
| 6486. |
An electron has kinetic energy \[2.8\times {{10}^{-23}}J\]. de-Broglie wavelength will be nearly \[({{m}_{e}}=9.1\times {{10}^{-31}}kg)\] [MP PET 2000] |
| A. | \[9.28\times {{10}^{-4}}\,m\] |
| B. | \[9.28\times {{10}^{-7}}\,m\] |
| C. | \[9.28\times {{10}^{-8}}\,m\] |
| D. | \[9.28\times {{10}^{-10}}\,m\] |
| Answer» D. \[9.28\times {{10}^{-10}}\,m\] | |
| 6487. |
The de-Broglie wavelength associated with a material particle is [JIPMER 2000] |
| A. | Directly proportional to its energy |
| B. | Directly proportional to momentum |
| C. | Inversely proportional to its energy |
| D. | Inversely proportional to momentum |
| Answer» E. | |
| 6488. |
De broglie equation describes the relationship of wavelength associated with the motion of an electron and its [MP PMT 1986] |
| A. | Mass |
| B. | Energy |
| C. | Momentum |
| D. | Charge |
| Answer» D. Charge | |
| 6489. |
Which of the following drugs is an analgesic |
| A. | Sulphaguanidine |
| B. | Paludrin |
| C. | Analgin |
| D. | Iodex |
| Answer» D. Iodex | |
| 6490. |
Antiseptic chloroxylenol is [KCET 2005] |
| A. | 4-chloro-3, 5-dimethylphenol |
| B. | 3-chloro-4, 5-dimethylphenol |
| C. | 4-chloro-2, 5-dimethylphenol |
| D. | 5-chloro-3, 4-dimethylphenol |
| Answer» B. 3-chloro-4, 5-dimethylphenol | |
| 6491. |
Which of the following is not an antibiotic [BVP 2004] |
| A. | Penicillin |
| B. | Sulphaguanidine |
| C. | Chloramphenical |
| D. | None of these |
| Answer» C. Chloramphenical | |
| 6492. |
When salicyclic acid is treated with acetic anhydride we get [DCE 2002] |
| A. | Aspirin |
| B. | Paracetamol |
| C. | Salol |
| D. | None of these |
| Answer» B. Paracetamol | |
| 6493. |
Which of the following is used as an antibiotic [Pb. CET 2002] |
| A. | Ciprofloxacin |
| B. | Paracetamol |
| C. | Ibuprofen |
| D. | Tocopherol |
| Answer» B. Paracetamol | |
| 6494. |
2-Acetoxy benzoic acid is used as an [KCET 2004] |
| A. | Antimalarial |
| B. | Antidepressant |
| C. | Antiseptic |
| D. | Antipyretic |
| Answer» E. | |
| 6495. |
Which one is an antibiotic |
| A. | Aspirin |
| B. | Chloromycetin |
| C. | Chloroquin |
| D. | Madribon |
| Answer» C. Chloroquin | |
| 6496. |
Which of the following is an antidiabatic drug [KCET 1998] |
| A. | Insulin |
| B. | Penicillin |
| C. | Chloroquine |
| D. | Aspirin |
| Answer» B. Penicillin | |
| 6497. |
Which of these is a hypnotic [AFMC 2001, 05] |
| A. | Metaldehyde |
| B. | Acetaldehyde |
| C. | Paraldehyde |
| D. | None of these |
| Answer» D. None of these | |
| 6498. |
Amoxillin is semi-synthetic modification of [Pb. PMT 1998] |
| A. | Penicillin |
| B. | Streptomycin |
| C. | Tetracycline |
| D. | Chloroampheniol |
| Answer» B. Streptomycin | |
| 6499. |
Acetoxy benzoic acid is [Kurukshetra CET 1998] |
| A. | Antiseptic |
| B. | Aspirin |
| C. | Antibiotic |
| D. | Mordant dye |
| Answer» C. Antibiotic | |
| 6500. |
Which of the following acts as an antioxidant in edible oils |
| A. | Vitamin B |
| B. | Vitamin C |
| C. | Vitamin D |
| D. | Vitamin E |
| Answer» E. | |