S Block Elements

For a good quality cement, the ratio of lime to the total of the oxides of $$\mathrm{Si}, \mathrm{Al}$$ and $\mathrm{Fe}$ should be as close as to :

KO₂ (potassium super oxide) is used in oxygen cylinders in space and submarines because it :

Which of the following on thermal decomposition yields a basic as well as an acidic oxide?

A metal on combustion in excess air forms X. X upon hydrolysis with water yields H₂O₂ and O₂ along with another product. The metal is :

One of the by-products formed during the recovery of NH₃ from Solvay process is :

A s-block element (M) reacts with oxygen to form an oxide of the formula MO₂. The oxide is pale yellow in colour and paramagnetic. The element (M) is :

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-amwm{font-weight:bold;text-align:center;vertical-align:top} .tg .tg-0lax{text-align:left;vertical-align:top} List-I Elements List-II Properties (a) Li (i) Poor water solubility of $${I^ - }$$ salt (b) Na (ii) Most abundant element in cell fluid (c) K (iii) Bicarbonate salt used in fire extinguisher (d) Cs (iv) Carbonate salt decomposes easily on heating Choose the correct 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-7btt{border-color:inherit;font-weight:bold;text-align:center;vertical-align:top} .tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top} .tg .tg-0lax{text-align:left;vertical-align:top} List - I List - II (a) Li (i) photoelectric cell (b) Na (ii) absorbent of $$C{O_2}$$ (c) K (iii) coolant in fast breeder nuclear reactor (d) Cs (iv) treatment of cancer (v) bearings for motor engines Choose the correct answer from the options given below :

Choose the correct statement from the following :

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

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

Correct statement about alkali metal oxides 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.

Lithium nitrate and sodium nitrate, when heated separately, respectively, give :

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-amwm{font-weight:bold;text-align:center;vertical-align:top} .tg .tg-0lax{text-align:left;vertical-align:top} List I List II A. Slaked lime I. $$\mathrm{NaOH}$$ B. Dead burnt plaster II. $$\mathrm{Ca(OH)_2}$$ C. Caustic soda III. $$\mathrm{Na_2CO_3\cdot 10H_2O}$$ D. Washing soda IV. $$\mathrm{CaSO_4}$$ Choose the correct answer from the options given below :

Which of the following reaction is correct?

Lithium aluminium hydride can be prepared from the reaction of :

Identify the correct order of standard enthalpy of formation of sodium halides :

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-amwm{font-weight:bold;text-align:center;vertical-align:top} List - I List - II A. K I. Thermonuclear reactions B. KCl II. Fertilizer C. KOH III. Sodium potassium pump D. Li IV. Absorbent of CO$$_2$$ Choose the correct answer from the options given below :