ECAT Chemistry Chapter 14 Group IIIA & IVA Elements Online Test With Answers

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ECAT Chemistry Chapter 14 Group IIIA & IVA Elements Online Test

Sr. # Questions Answers Choice
1 On alkali and alkaline earth metals down the group, there is decreasing trend in m.p. b.p. Ionization potentiall All of these
2 Which carbonate of alkali metals is insoluble in water Na<sub>2</sub>CO<sub>3</sub> K<sub>2</sub>CO<sub>3</sub> Li<sub>2</sub>CO<sub>3</sub> Cs<sub>2</sub>CO<sub>3</sub>
3 ______ reacts with alkalis to give hydrogen Be Mg Ca None
4 In a group IIA from top to bottom as the atomic number increases, there is regular decreases in Ionic size Atomic size Ionization potential None of these
5 LiOH ______ soluble than NaOH More soluble Less soluble Equally soluble None
6 Which colour is imparted by sodium Yellow Violet Red Crimson
7 The chemical formula of magnesite is MgCl<sub>2</sub> Mg(HCO<sub>3</sub>)<sub>2</sub> MgCO<sub>3</sub> None of these
8 In the earth crust sodium is 2.50% 2.30% 2.40% 3.50%
9 Alkaline earth metals posses two electrons in their outermost F-orbital D-orbital S-orbital P-orbital
10 Which is an essential constituent of chlorophyll Be Fe Mg Ca
11 S-block elements consist of Alkali metals Alkaline earth metals Alkali and alkaline earth metals None of these
12 The maximum number of electrons in the outermost shall of s-black elements is One Two Three Four
13 Potassium superoxide has a use in breathing equipment in space crafts. The balanced equation for the reaction is
14 Which of the following is not the reactions of lithium
15 Gypsum is a common mineral of Magnesium Strontium Calcium Barium
16 Borax is a common mineral of alkali metal sodium. Its formula is Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub> Na<sub>2</sub>,B<sub>4</sub>O<sub>7</sub>. 10H<sub>2</sub>O Na<sub>2</sub>B<sub>3</sub>O<sub>6</sub>. 10H<sub>2</sub>O Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>- 5H<sub>2</sub>O
17 Which of the following is lighter Li k Na Ca
18 The alkaline earth elements have in their s-orbital One electron Two electron No electron Three electron
19 Which of the element is not an alkaline earth metal Beryllium Strontium Barium Caesium
20 Which of the element is not alkali metal Lithium Rubidium Francium Magnesium
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