Chemistry Question Bank

Along the group in alkali metals the density

Which of the following elements(s) form stable superoxide?

…A…is used in the manufacturing of soft soap. Here, A refer to

Alkali metals have …X… size in a particular period. Here, X refer to

Monovalent ions are …A…than parent atom. Here, A refers to

All alkaline metals have …A… valence electrons(s). Here, A refer to

Atomic and ionic radii of alkali metals …X… on moving down the group. Here, X refer to

Which of the following shows diagonal relationship?

The diagonal relationship of elements arises due to the similarity in

Alkali metals show regular trend in their physical and chemical properties with the

The ionization enthalpies of alkali metals are considerably

Among the alkali metals …A and …B… are relatively more abundant in nature. Here A and B refer to

Which of the following does not belong to alkaline earth metal?

…X and …Y…Shown diagonal similarity. Here, X and Y refer to

The correct decreasing order of ionization enthalpy in alkali metals is

Lithium and magnesium oxides and hydroxides are …X… soluble in water. Here, X refers to

Sodium …X… is widely used as a/an …Y…. Here, X and Y refer to

The correct trend of melting point and boiling point of alkali metal halides

Low solubility of LiF in water is due to …A… Here, A refer to

aK Cr O bKCl cH SO → xCrO Cl yKHSO zH O The above equation balances when

In the chemical reaction, K₂Cr₂O₇ + XH₂SO₄ + YSO₂ → K₂SO₄ + Cr₂(SO₄)₃ + ZH₂O, X, Y and Z are

For the redox reaction MnO₄– + C₂O₄₂– + H⁺ → Mn²⁺ + CO₂ + H₂O, The correct stoichiometric coefficients of MnO₄– , C₂O₄₂– and H⁺ are respectively:

Which of the following reaction is balanced? (a) AsO MnO AsO MnO 2H O → (b) MnO C O Mn CO → (c) 3 2 Cu 4HNO Cu(NO ) 2NO 2H O → (d) H S HNO H O NO S → Ans (c) Sol. In option (a), 2- - 3- AsO +MnO AsO +MnO +2H O → The n…

What is the stoichiometric coefficient of Ca in the reaction? Ca Al Ca Al →

The ratio of stoichiometric coefficient of Fe²⁺ and MnO