Guinness MCQs for Khuddam-ul-Hujjaj/ Nazims

2901

The same moles of H₂, N₂ and O₂ are present in 0.1 cc volume at STP. Which one has greatest number of molecules:

A. N₂ B. H₂ C. O₂ D. Number of molecules are equal

2902

Which oxyacid of halogen is strong oxidizing agent?

A. HClO₄ B. HClO₃ C. HClO D. HClO₂

2903

Propanone can be prepared from propyne by:

A. Passing a mixture of propyne and ethanol over a catalyst, zinc chromate B. Passing a mixture of propyne and steam over a catalyst, magnesium at 420°C C. Boiling propyne with water in the presence of HgSO₄ and H₂SO₄ D. Treating propyne with iodine and NAOH

2904

Mr. Khan mix acetic acid with thionyl chloride. Which product is obtained?

A. CH₃COCl + SO₂ + HCl B. CH₃Cl + CH₃COCl C. CH₃Cl + SO₂+HCl D. CH₃COOCH₃ + SO₂

2905

After the digestion & before absorption the product of the protein is:

A. Amino Acid and small polypeptide B. Only Amino Acid C. Only ammonia D. Only small polypeptide

2906

Dehydration of alcohol gives which of the following product in the presence of H₂SO₄ at 140°?

A. Acetaldehyde B. Diethyl ether C. Ethyl acetate D. Ethyl chloride

2907

Complete oxidation of alcohol gives which of the following?

A. Aldehyde B. Alkane C. Carboxylic acid D. Ketone

2908

What are vinyl alcohol and acetaldehyde?

A. Position Isomers B. Chain Isomers C. Metamers D. Tautomers

2909

Select the metal which is extracted from bauxite?

A. Al B. Ca C. Mg D. Cu

2910

All alkali metals react with chlorine gas to form white metal chlorides salt. The metal chlorides salt formed is:

A. Insoluble B. Soluble in water to give neutral solution of ph 7 C. Soluble in water to give acidic solution of ph 1 D. Soluble in water to give alkaline solution of ph 14

2911

Which one of them is amphoteric in nature?

A. Lithium oxide B. Beryllium oxide C. Calcium oxide D. Potassium oxide

2912

What is the molecular formula of pyridine molecule?

A. C₆H₅N B. C₅H₅N C. C₅H₅NH D. C₆H₆N

2913

Identify which method is used to prepare Alkynes?

A. Dehalogenation of Vicinal Dihalides in the presence of methanol. B. Dehydration of Alcohols in the presence of Al₂O₃ at 340-450-degree centigrade. C. Dehalogenation of Vicinal Dihalides in the presence of strong base. D. Electrolysis of di carboxylic acid salts.

2914

To store the electric charge the ultra-capacitors use ______ effect.

A. Single layer B. Double layer C. Triple layer D. Quadruple layer

2915

Gauss law cannot be used to find which of the following quantity?

A. Electric field intensity B. Electric flux density C. Charge D. Permittivity

2916

Electric field intensity inside a hollow charged sphere is:

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

2917

For an ideal gas equation PV= nRT, the dimensions of Real Gas Constant R are:

A. [M¹ L² T⁻² K⁻¹] B. [M¹ L⁻³ T⁻¹ K⁻¹] C. [M¹ L⁻² T⁻¹ K⁻¹] D. [M¹ L⁻³ T⁻² K⁻¹]

2918

A distant star is receding from the Earth with a speed of 1.40 × 10⁷ m/s. It emits light of frequency 4.57 × 10¹⁴ Hz. The speed of light is 3.0 × 10⁸ m/s. The Doppler effect formula can be used with light waves. What will be the frequency of this light when detected on Earth?

A. 2.04 × 10¹³ Hz B. 4.37 × 10¹⁴ Hz C. 4.57 × 10¹⁴ Hz D. 4.79 × 10¹⁴ Hz

2919

If transverse waves are passing through medium, then particle of medium:

A. Remain stationary B. Move away C. Move toward D. Move in Simple Harmonic Motion

2920

In principle, the transformer consists of two coils of copper, electrically insulated from each other, wound on the same?

A. Iron core B. Copper core C. Gold core D. Steel core

Guinness World Records (General Knowledge Focus) MCQs with Answers & Explanations (Page 146)

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