Guinness World Records (General Knowledge - Page

501

If in solution some bacteria infected by a certain phages had somehow developed the ability to make a particular amino acid that was not in their genes before. What would be the possible explanation to his new ability?

A. Induction B. Transformation C. Transduction D. Conjugation

502

Identify in which of the following the genetic information is catalyzed using reverse transcription:

A. Protein→DNA B. RNA →DNA C. DNA→RNA D. RNA Protein

503

The sound waves of frequency more than 20 kHz are termed as:

A. Supersonic B. Audible C. Infrasonic D. Ultrasonic

504

"He is busy. Would you like to leave a message?" Said the assistant.

A. The assistant told that he is busy and asked me to leave a message. B. The assistant told that he is busy and ask me to leave a message C. The assistant told that he was busy and asked me to leave a message D. The assistant told that he was busy and asked me to leave a message.

505

The less energetic and more stable compound among the following is:

A. Cyclobutane B. Hex-1-ene C. Cyclopropane D. Propene

506

Amorphous solids are made by fusing silicates with:

A. Boric acid B. Aluminum oxide C. Phosphorus pent oxide D. All of the above

507

What is the product when chlorine gas is passed over element silicon in powdered state and heated it produce colorless liquid having formula?

A. SiCl₂ B. SiCl₄ C. Si₂Cl₃ D. SiCl

508

Compound resistant to thermal decomposition is:

A. Li₂CO₃ B. NaNO₃ C. Ba(NO₃)₂ D. Na₂CO₃

509

If x-component of a vector is √3 and y-component is 1, then the angle made by the vector along x-axis is:

A. 30° B. 45° C. 60° D. 90°

510

Which of the locomotor organ would likely be the shortest?

A. A flagellum B. A cilium C. An extended pseudopod D. A pellicle

511

In Young double slit experiment with sodium light, the slit are 0.589m apart. What is the angular width of the third maximum given λ=589nm?

A. sin⁻¹(3×10⁻⁶) B. sin⁻¹(3×10⁻⁸) C. sin⁻¹(3×10⁶) D. sin⁻¹(3×10⁸)

512

When a ray of light enters a glass slit from air:

A. Its wavelength decreases B. Its wavelength increases C. Its frequency increases D. Its frequency decreases

513

Choose the antonym of the word "UNTENABLE".

A. Tender B. Sheepish C. Supportable D. Tremulous

514

Kolbe's electrolysis of sodium butyrate CH₃CH₂CH₂COONa gives:

A. C₆H₁₂ B. C₆H₁₄ C. C₅H₁₀ D. C₅H₁₂

515

Standing waves are produced in 10 m long stretched string. If the string vibrates in 5 segments and wave velocity is 20 ms⁻¹, its frequency is:

A. 2 Hz B. 4 Hz C. 5 Hz D. 10 Hz

516

Ka values of some compound are given below, select the correct order of acidic strength:i.H₂O = H⁺ + OH⁻ Ka=1x10⁻¹⁴ii.ROH = RO⁻ + H⁺ Ka=1x10⁻¹⁸iii.RCOOH = RCOO⁻ + H⁺ Ka=1x10⁻⁵ iv.C₆H₅OH = C₆H₅O⁻ + H⁺ Ka=1x10⁻¹⁰

A. ROH > H₂O > C₆H₅OH > RCOOH B. C₆H₅OH > H₂O > ROH > RCOOH C. RCOOH > C₆H₅OH > H₂O > ROH D. RCOOH > ROH > C₆H₅OH > H₂O

517

The compound which cannot be hydrolyzed by water is:

A. CH₃-CH₂-C(O)-Br B. CH₃-C(O)-O-C(O)-CH₃ C. CH₃-CH₂-C(O)-NH₂ D. None of the above

518

Phosphorus (white) catches fire in air and burns with the formation of white smoke the product formed is:

A. Phosphorus (iii) oxide B. Phosphorus (v) oxide C. Phosphorus (ii) oxide D. Both (A) & (B)

519

What type of hybridization is/are present in Hex-4-ene-1-yne:

A. Sp² B. Sp C. Sp and Sp² D. Sp, Sp², Sp³

520

In Saturated fatty acids more hydrogen are not accommodated because of:

A. Presence of single bonds between carbon atoms. B. Presence of Double bonds between carbon atoms. C. Absence of bond between carbon atoms. D. All of these

Guinness World Records (General Knowledge Focus) MCQs with Answers & Explanations (Page 26)

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