Chemistry MCQ Set 2

Question : The rate law for a chemical reaction N₂S₅ → 2NO₂ + ½ O₂ Is shown as Rate = K|N₂S₅| Identify the order of the reaction.

1. First order
2. Second order
3. Third order
4. Zero order

Question : The rate law for chemical reaction 2NO_2(g) → 2NO_(g) + O2_(g) Is represented by the expression Rate = K|NO₂|² The order of reaction is

1. First order
2. Second order
3. Third order
4. Zero order

Question : The rate of reaction is defined as

1. dc/dt
2. dt/dc
3. dc.dt
4. (dc)²/(dt)²

Question : The elements of the first group belong to

1. s-block
2. p-block
3. d-block
4. f-block

Question : Mendaleef formed a rule for periodic classification of elements on the basis that

1. Physical and chemical properties of elements are periodic function of their atomic numbers.
2. Physical and chemical properties of elements are periodic function of their atomic weight.
3. Chemical properties of elements are periodic function of their atomic weight.
4. Physical properties of elements are periodic function of their atomic numbers.

Question : The elements of the first group are also called

1. Alkali metals
2. Alkaline earth metals
3. Halogens
4. Noble elements