ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 ______ is called milk of magnesia NaOH KOH LiOH None
2 ______ is used in breathing equipments for mountaineers and in space craft Li<sub>2</sub>O BeO N<sub>2</sub> KO<sub>2</sub>
3 The electrolytic cell used for the production of metallic sodium is known as Down's cell Solvary's cell Haber's cell None of these
4 Carbonates of alkali metals dissolves freely in water to form Acidic solutions Neutral solution Alkaline solution None of these
5 NaHCO3is commonly called Soda ash Baking soda Washing soda None of these
6 ______ gives peroxide Li Ba Sr Be
7 Which of the following form normal oxide K Li Na None
8 Which of the following is the hardest metal among following Li Na Rb K
9 Which of the following salt is soluble in water CaCO<sub>3</sub> CaSO<sub>4</sub> MgSO<sub>4</sub> BaSO<sub>4</sub>
10 Alkali metals react violently with halogens to form Hydrides Halides Anyhydrides None of these
11 The formula of lime stone is CaCl<sub>2</sub> MgCO<sub>3</sub> Na<sub>2</sub>CO<sub>3</sub> CaCO<sub>3</sub>
12 The alkali metals form Ionic bond Covalent bond Co-ordinate bond H-bond
13 The chemical formula of gypsum is CaSO<sub>4</sub>. 5H<sub>2</sub>O CaSO<sub>4</sub>. 4H<sub>2</sub>O CaSO<sub>4</sub>. 2H<sub>2</sub>O None of these
14 Which of all following compound is not possible
15 On alkali and alkaline earth metals down the group, there is decreasing trend in m.p. b.p. Ionization potentiall All of these
16 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>
17 ______ reacts with alkalis to give hydrogen Be Mg Ca None
18 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
19 LiOH ______ soluble than NaOH More soluble Less soluble Equally soluble None
20 Which colour is imparted by sodium Yellow Violet Red Crimson
21 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
22 In the earth crust sodium is 2.50% 2.30% 2.40% 3.50%
23 Alkaline earth metals posses two electrons in their outermost F-orbital D-orbital S-orbital P-orbital
24 Which is an essential constituent of chlorophyll Be Fe Mg Ca
25 S-block elements consist of Alkali metals Alkaline earth metals Alkali and alkaline earth metals None of these
26 The maximum number of electrons in the outermost shall of s-black elements is One Two Three Four
27 Potassium superoxide has a use in breathing equipment in space crafts. The balanced equation for the reaction is
28 Which of the following is not the reactions of lithium
29 Gypsum is a common mineral of Magnesium Strontium Calcium Barium
30 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
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