Guinness MCQs for Khuddam-ul-Hujjaj/ Nazims

1161

Potassium ferrocyanide is which type of salt?

A. Complex B. Double C. Mixed D. Normal

1162

Pyridine belongs to which class of organic compounds?

A. Alicyclic B. Heterocyclic C. Homocyclic D. Hydrocarbon

1163

Which of the following elements cannot be detected directly in a given organic compound?

A. Chlorine B. Nitrogen C. Oxygen D. Phosphorous

1164

Addition of HBr to isobutylene mainly gives?

A. isobutyl bromide B. n-butyl bromide C. sec-butyl bromide D. tert-butyl bromide

1165

Dehydrohalogenation of alkylhalide is carried out in presence of:

A. Alcoholic KOH B. Aqueous KOH C. Conc. H₂SO₄ D. Zn dust

1166

The pK₆ of n-propyl amine is:

A. 3.24 B. 3.28 C. 3.32 D. 3.35

1167

Oxidation of secondary alcohol gives?

A. Carboxylic acid B. Ether C. Ketone D. Phenol

1168

Which aldehyde is more reactive towards nucleophilic addition?

A. Acetaldehyde B. Butyraldehyde C. Propionaldehyde D. Formaldehyde

1169

In competitive inhibition, the inhibitor:

A. Binds with substrate B. Competes with enzyme C. Competes with substrate D. Irreversibly binds with enzyme

1170

How many moles are there in 60g of sodium hydroxide (NaOH)?

A. 2 B. 4 C. 6 D. 8

1171

Heating 24.8g of copper carbonate (CuCO₃) in a crucible produced only 13.9g of copper oxide (CuO). What is the percentage yield of copper oxide?

A. 81.79% B. 83.98% C. 86.87% D. 89.68%

1172

Which of the following sub-shell does not exist?

A. 1p B. 1s C. 5d D. 6f

1173

Which element has the electronic configuration of noble-gas notation [Kr], 5S², 4d²?

A. Mo B. Se C. Sr D. Zr

1174

What is the mass of 1 mole of calcium carbonate (CaCO₃)?

A. 50g B. 75g C. 100g D. 125g

1175

For rigid body that rotates about a fixed axis, the angle swept out by a line passing through any point on the body and intersecting the axis of rotation perpendicularly is called?

A. Angular acceleration B. Angular displacement C. Angular velocity D. Angular momentum

1176

What happens when two waves of the same frequency and amplitude meet in phase?

A. They produce a wave with the same amplitude as the individual waves B. They combine to form a wave double the amplitude, resulting in constructive interference C. They produce a wave with zero amplitude D. They cancel each other out resulting in a destructive interference

1177

For longitudinal waves:

A. The particles of the medium remain stationary as the wave passes through B. The particles of the medium oscillate perpendicular to the wave's propagation C. The particles of the medium oscillate along the direction of the wave's propagation D. Their velocity is enhanced when they travel through vacuum

1178

According to the principle of superimposition, when 2 or more waves overlap at a point in space, the amplitude of the resultant wave at that point is?

A. Always zero B. The product of the individual wave amplitude C. The product of the frequencies of the individual waves D. The sum of the amplitudes of the individual waves

1179

If the dielectric material between the plates of the capacitor is removed, what happens to the electric field between the plates?

A. The electric field becomes zero B. The electric field decreases C. The electric field increases D. The electric field remains the same

1180

The I-V Graph for a non-Ohmic material is always:

A. Curved B. Horizontal C. Linear D. Perpendicular

Guinness World Records (General Knowledge Focus) MCQs with Answers & Explanations (Page 59)

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