Arrange the following in the decreasing order of their covalent character : (A) LiCl (B) NaCl (C) KCl (D) CsCl Choose the most appropriate answer from the options given below :

Match List-I with List-II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-baqh{text-align:center;vertical-align:top} .tg .tg-0lax{text-align:left;vertical-align:top} List-I (Metal) List-II (Emitted light wavelength (nm)) (A) Li (I) 670.8 (B) Na (II) 589.2 (C) Rb (III) 780.0 (D) Cs (IV) 455.5 Choose the most appropriate answer from the options given below :

Amongst baking soda, caustic soda and washing soda, carbonate anion is present in :

Addition of H2SO4 to BaO2 produces :

BeCl2 reacts with LiAlH4 to give :

The correct order of melting point is :

s-block element which cannot be qualitatively confirmed by the flame test is :

Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution?

In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?

Which one of the following compounds is used as a chemical in certain type of fire extinguishers?

Which of the following statements are correct? (A) Both LiCl and MgCl2 are soluble in ethanol. (B) The oxides Li2O and MgO combine with excess of oxygen to give superoxide. (C) LiF is less soluble in water than other alkali metal fluorides. (D) Li2O is more soluble in water than other alkali metal oxides. Choose the most appropriate answer from the options given below :

Match List - I with List - II : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-1wig{font-weight:bold;text-align:left;vertical-align:top} .tg .tg-0lax{text-align:left;vertical-align:top} List-I List-II (a) Sodium hydride (i) Lewis acid (b) Silane (ii) Saline hydride (c) Vanadium hydride (iii) Molecular hydride (d) Aluminium hydride (iv) Non-stoichiometric hydride Correct answer is :

Correct statement about alkali metal oxides is :

Choose the correct order of density of the alkali metals :

The correct order of density is :

Reaction of $${\mathrm{BeCl}}_2$$ with $${\mathrm{LiAlH}}_4$$ gives : (A) $${\mathrm{AlCl}}_3$$ (B) $${\mathrm{BeH}}_2$$ (C) $$\mathrm{LiH}$$ (D) $$\mathrm{LiCl}$$ (E) $${\mathrm{BeAlH}}_4$$ Choose the correct answer from options given below :

The metal that has very low melting point and its periodic position is closer to a metalloid is :

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: $$\mathrm{LiF}$$ is sparingly soluble in water. Reason R: The ionic radius of $${\mathrm{Li}}^{+}$$ ion is smallest among its group members, hence has least hydration enthalpy. In the light of the above statements, choose the most appropriate answer from the options given below.

An element A of group 1 shows similarity to an element B belonging to group 2. If A has maximum hydration enthalpy in group 1 then B is :

Which of the following statement is incorrect?