Chemistry MCQs

A. 1s2,2s2,2p6 B. 1s2,2s2,2p6,3s2 C. 1s2,2s2,2p6,3s1 D. None of these

A. Compound B. Element C. Electrolyte D. Mixture In chemistry, a solution is a homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent. Air is an example of gas solution as it is an homogeneous mixture of several gases.

A. Iron B. Calcium C. Mercury D. Chromium

A. 456kJ/mol B. 562kJ/mol C. 281kJ/mol D. None

A. Addition reaction B. Substitution reactions C. Halogenation D. All of these enzene is much more stable than expected. The extra stability means that benzene will less readily undergo addition reactions. In benzene, the π-electrons are delocalised and makes the structure more stable. Thus, benzene does not give addition reactions because of resonance stabilisation. The … Read more

A. Si2O3 B. SiO2 C. Al2O3 D. Sr2O The chemical compound silicon dioxide, also known as silica (from the Latin silex), is an oxide of silicon with a chemical formula of SiO2 and has been known for its hardness since antiquity. Silica is most commonly found in nature as sand or quartz, as well as … Read more

A. Sand and Iron Filing B. Sand and Naphthalene C. Both A & B D. None

A. To check its Acidity and Basicity B. To Check temperature C. To check its Purity and nature D. None of These

A. Due to Hydrogen bonding B. Due to high molecular weight C. Due to its Acidic nature D. Due to its Low molecular weight

A. 78°C B. 58°C C. 73°C D. 56°C