Chemistry

Which of the following compounds is the best possible anti-knock agent for petrol?

A. (CH3)2CH - CH(CH3)CH2CH3 B. CH3CH2(CH3)CHCH2CH2CH3 C. CH3CH2(CH3)CHCH2CH2CH3 D. (CH3)3C - CH2CH2CH3 Correct Answer: Option A - (CH3)2CH - CH(CH3)CH2CH3

4 years ago

In the reaction below; the cyanide is?

CH3CH2Cl + KCN → CH3CH2CN + KCl A. hydrophobic B. hydrophilic C. nucleophilic D. electrophilic Correct Answer: Option C -…

4 years ago

Which of the following represents an aromatic compound?

A. C6H5OH B. C6H12 C. C6H9OH D. C6H8   Correct Answer: Option A - C6H5OH

4 years ago

A mixture of petrol and water can be separated through?

A. centrifugation B. distillation C. the use of separating funnel D. the use of filter paper Correct Answer: Option C…

4 years ago

A metal X forms two bromides with the formulae XBr2 and XBr3. What type of bonding exists between X and bromine in the bromide?

A. Ionic bonding B. Metallic bonding C. Dative bonding D. Covalent bonding Correct Answer: Option A - Ionic bonding

4 years ago

The elements that belong to the third period of the periodic table are?

A. Li, Be, Al and P B. Na, P, O and Cl C. B, C, N and O D. Nz,…

4 years ago

Which of the following decrease when a given mass of gas is compressed to half its initial volume?

A. Atomic radius of each B. Average intermolecular distance C. Frequency of collisions D. Number of molecules presents Correct Answer:…

4 years ago

What is the volume of oxygen required to burn complete 45 cm³ of methane at s.t.p?

A. 135.0 cm³ B. 180.0 cm³ C. 45.0 cm³ D. 90.0 cm³ Correct Answer: Option D - 90.0 cm³ Explanation…

4 years ago

Which experiment led to the measurement of the charge on an electron?

A. Mass spectrometric experiment B. Oil-drop experiment C. Scattering α - particles D. Discharge-tube experiment Correct Answer: Option B -…

4 years ago