Guinness MCQs for Khuddam-ul-Hujjaj/ Nazims

2081

An orthopedic specialist observed the X-ray of the joint of a patient and detected hardening of the cartilage due to excess calcium deposit. Consequently, the joint was very stiff and crippled the patient. What was the patient suffering from?

A. Disc slip B. Spondylosis C. Arthritis D. Sciatica

2082

Dry distillation of which of the following can be done to produce acetone?

A. Calcium acetate B. Calcium formate C. Ethyl acetate D. Acetic acid

2083

The elimination between alkyl halides and a strong base takes place by two mechanisms-E1 and E2. How many steps are involved in each one of these?

A. E1 elimination is two steps & E2 is one step B. E1 & E2 both take place in one step C. E1 & E2 both take place in two steps D. E1 elimination is one step & E2 is two steps

2084

Which of the following is an example of a tertiary alkyl halide?

A. 2-chlorobutane B. 1-chloromethyl pentane C. 2-bromo-3-methyl butane D. 2-bromo-2-methyl butane

2085

The radius of the first orbit of hydrogen is 0.53 Å. Which orbit has a radius of 4.77 Å?

A. First B. Second C. Third D. Fourth

2086

Which of the following has only one orientation in space in the magnetic field?

A. p orbital B. s orbital C. d orbital D. f orbital

2087

What's the mass of one proton?

A. Equal to 1836 electrons B. Equal to a positron C. Equal to an electron D. Equal to 1836 neutrons

2088

Which of the following is different in Na+ (Z=11), Mg^+2 (Z=12) and Al^+3 (Z=13)?

A. Number of shells B. Number of electrons C. Electronic configuration D. Number of protons

2089

What volume of oxygen at S.T.P is required to burn 500 dm³ of ethene?

A. 500 dm³ B. 1000 dm³ C. 1500 dm³ D. 2000 dm³

2090

Ca (Z=20) forms an ionic bond with Cl (Z=17). What is the chemical formula of calcium chloride?

A. CaCl B. CaCl₂ C. Ca₂Cl₂ D. Ca₂Cl

2091

What hybridization is present on carbon atoms in Ethyne (C₂H₂)?

A. sp² B. sp³ C. sp D. dsp²

2092

Isopropyl chloride is an example of:

A. Primary alkyl halide B. Secondary alkyl halide C. Tertiary alkyl halide D. Quaternary alkyl halide

2093

What is the IUPAC name of chloroform?

A. Dichloromethane B. Chloromethane C. Tetrachloromethane D. Trichloromethane

2094

Which of the following produces Maleic anhydride on oxidation?

A. Acetylene B. Phenol C. Toluene D. Benzene

2095

What is the oxidation number of Mn in K₂MnO₄?

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

2096

In the electrochemical series, what is the electrode potential of all metals above Hydrogen?

A. Zero B. Negative C. Positive D. Greater than zero

2097

Organic compounds are classified into: A. Carbon compounds and non-carbon compounds

A. Carbon compounds and non-carbon compounds B. Open chain and closed chain compounds C. Homocyclic and heterocyclic compounds D. Aromatic and cyclic compounds

2098

Which of the following are the three isomers of Pentane?

A. n-pentane, 2-methylbutane, 2,2-dimethylpropane B. n-pentane, 2-methylbutane, 2,2-dimethylbutane C. n-pentane, 3-methylbutane, 2,2-dimethylpentane D. n-pentane, 2-methylpentane, 2,2-dimethylpropane

2099

An organic compound has C=40%, H=6.67%, and O=53.3%. What is the empirical formula of the compound?

A. CH₃O B. C₂H₃O C. CH₂O D. C₂H₂O

2100

6 grams of CS₂ is reacted with 12.8g of O₂, CS₂ + 3O₂ → CO₂ + 2SO₂. The limiting reactant is:

A. CS₂ B. O₂ C. CO₂ D. SO₂

Guinness World Records (General Knowledge Focus) MCQs with Answers & Explanations (Page 105)

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