ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 CaC2on hydrolysis form CH<sub>4</sub> C<sub>2</sub>H<sub>4</sub> C<sub>2</sub>H<sub>2</sub> C<sub>6</sub>H<sub>6</sub>
2 The chemical formula of chile salt peter is Na<sub>2</sub>CO<sub>3</sub> KNO<sub>3</sub> NaNO<sub>3</sub> NaNO<sub>2</sub>
3 Lithium reacts with air to form Peroxide Normal oxide Superoxide None of these
4 ______ is called milk of magnesia NaOH KOH LiOH None
5 ______ 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>
6 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
7 Carbonates of alkali metals dissolves freely in water to form Acidic solutions Neutral solution Alkaline solution None of these
8 NaHCO3is commonly called Soda ash Baking soda Washing soda None of these
9 ______ gives peroxide Li Ba Sr Be
10 Which of the following form normal oxide K Li Na None
11 Which of the following is the hardest metal among following Li Na Rb K
12 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>
13 Alkali metals react violently with halogens to form Hydrides Halides Anyhydrides None of these
14 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>
15 The alkali metals form Ionic bond Covalent bond Co-ordinate bond H-bond
16 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
17 Which of all following compound is not possible
18 On alkali and alkaline earth metals down the group, there is decreasing trend in m.p. b.p. Ionization potentiall All of these
19 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>
20 ______ reacts with alkalis to give hydrogen Be Mg Ca None
21 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
22 LiOH ______ soluble than NaOH More soluble Less soluble Equally soluble None
23 Which colour is imparted by sodium Yellow Violet Red Crimson
24 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
25 In the earth crust sodium is 2.50% 2.30% 2.40% 3.50%
26 Alkaline earth metals posses two electrons in their outermost F-orbital D-orbital S-orbital P-orbital
27 Which is an essential constituent of chlorophyll Be Fe Mg Ca
28 S-block elements consist of Alkali metals Alkaline earth metals Alkali and alkaline earth metals None of these
29 The maximum number of electrons in the outermost shall of s-black elements is One Two Three Four
30 Potassium superoxide has a use in breathing equipment in space crafts. The balanced equation for the reaction is
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