Guinness MCQs for Khuddam-ul-Hujjaj/ Nazims

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10583 Questions

1661

Bakelite is formed upon polymerization of:

A. Phenol + HCHO (dil. base) B. Phenol + NaOH + H₂O C. Phenol + H₂SO₄ + H₂O D. Phenol + CH₃COCl + H₂SO₄

1662

The increasing order of reactivity of alcohols towards nucleophile is:

A. 2-methyl-2-pentanol < 3-methyl-2-pentanol < 2-methyl-1-pentanol B. 2-methyl-2-pentanol > 3-methyl-2-pentanol > 2-methyl-1-pentanol C. 2-methyl-1-pentanol < 3-methyl-2-pentanol < 2-methyl-2-pentanol D. 2-methyl-1-pentanol > 3-methyl-2-pentanol > 2-methyl-2-pentanol

1663

Select the alkane showing geometrical isomerism:

A. 3-methyl-1-butene B. Methyl cyclopentane C. 2,3-dimethyl-2-butene D. 3-methyl-2-pentene

1664

When a metal carbonate is heated at 100°C, which of the following compound will readily decompose?

A. BaCO₃ B. MgCO₃ C. BeCO₃ D. SrCO₃

1665

What is the power of electric motor when it performs work of 64 x 10⁶ J in 8 seconds?

A. 8 Kilowatts B. 7 Kilowatts C. 8 Megawatts D. 7 Megawatts

1666

The relation between K.E and momentum P is given by:

A. K.E=½P/M B. K.E=½P/M² C. K.E=½P²/M² D. K.E=½P²/M

1667

The velocity of an object moving in a circle is:

A. Constant B. Variable C. Zero D. Negative

1668

In projectile motion for which angle maximum height is half of its range?

A. 73° B. 65° C. 68° D. 63°

1669

Sara goes around a circular track that has diameter of 20m. If she runs around the entire track for a distance of 180m, What is her angular displacement?

A. 16 radians B. 18 radians C. 8 radians D. 50 radians

1670

Angle swept by minute hand in one minute is:

A. 6° B. 8° C. 20° D. 36°

1671

To find the direction of angular displacement:

A. Grasp the axis of rotation in right hand B. Grasp the axis of rotation in left hand C. Put the thumb of left hand in the direction of circular motion D. Put the thumb of right hand in the direction of circular motion

1672

A particle moves in a circle of radius 200 cm with a linear speed of 20 m/s. Find the angular velocity:

A. 2 rad·s⁻¹ B. 200 rad·s⁻¹ C. 20 rad·s⁻¹ D. 10 rad·s⁻¹

1673

For anti-clock wise rotation the angular displacement is:

A. Negative B. Positive C. Null D. Zero

1674

Speed of sound in solid is greater than speed of sound in air because ratio:

A. (√E/ρ) solid < (√E/ρ) air B. (√E/ρ) solid > (√E/ρ) air C. (√E/ρ) solid = (√E/ρ) air D. (√E/ρ) solid ≤ (√E/ρ) air

1675

A body of mass 10 kg is connected to a spring and it is oscillating on a horizontal frictionless surface. If the maximum displacement of body is 20cm and spring constant is 20Nm⁻¹, What is the acceleration of the body?

A. 4 ms⁻² B. 2.2 ms⁻² C. 2 ms⁻² D. 0.4 ms⁻²

1676

A normal person can hear sound waves ranging in frequency from 20Hz to 20KHz. The maximum wavelength is:

A. 17m B. 17mm C. 17cm D. 17km

1677

The electric field at distance of 10cm from a 2µC point charge is:

A. 1.8 C B. 180 C C. 18 C D. 1800 C

1678

At midpoint P between two +4q charges:

A. V = 0, E = 0 B. V = 0, E ≠ 0 C. V ≠ 0, E ≠ 0 D. V ≠ 0, E = 0

1679

The phase shift between voltage and current when AC flows through capacitor is:

A. 1/2 B. π C. 2π D. π/4

1680

The horizontal range of projectile will be maximum when?

A. Sin θ = 1 B. Sin 2θ = 1 C. Sin β = 0 D. Sin 2β = 0

Guinness World Records (General Knowledge Focus) MCQs with Answers & Explanations (Page 84)

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