ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Which property is not present in Al? Reacts with acid Reacts with bases Changes litmus paper Changes methyle orange colour
2 Al is the most element in earth crust: O Si Al Pb
3 Density of aluminium is (g cm-3): B Al Si Ge
4 Which has soapy touch? Na2B4O7 H3BO3 Ca2B6O11 HBO2
5 Copper oxide is dedected by borax bead test with colour: Blue Red Yellow Black
6 Which is used to remove air bubbles form metals? B Be Mg Al
7 Which is used in navigational equipments? B Be Mg Al
8 Pb has inert pair of electrons: One Two Three Four
9 Which is not the form of silica? Amethyst quatz Rose quatz Smoky None of these
10 Silicon atom is hybridized: sp sp<sup>2</sup> sp<sup>3</sup> dsp<sup>2</sup>
11 Borax is hydrated: Penta Deca Hepta Octa
12 What is chrome yellow? Pbo Pb<sub>2</sub>O PbCrO<sub>4</sub> Pb<sub>3</sub>O<sub>4</sub>
13 Which is litharge or massicot? PbO Pb<sub>2</sub>O Pb<sub>3</sub>O<sub>4</sub> PbO<sub>2</sub>
14 What is going to replace the petroleum? Silica Silicates Silicones Silicon
15 What is the formula of asbestos? CaMg<sub>3</sub>(SiO<sub>3</sub>)<sub>4</sub> CaSiO<sub>3</sub> Na<sub>2</sub>SiO<sub>3</sub> Mg<sub>3</sub>H<sub>2</sub>(SiO<sub>3</sub>)<sub>4</sub>
16 Chief ore of aluminium is: Na<sub>3</sub>AIF<sub>6</sub> Al<sub>2</sub>O<sub>3</sub>.2H<sub>2</sub>O Al<sub>2</sub>O<sub>3</sub> Al<sub>2</sub>O<sub>3</sub> .H<sub>2</sub>O
17 Tincal is a mineral of: Al B Si C
18 Which of the following elements is not present abundantly in earth's crust? Silicon Aluminium Sodium Oxygen
19 Boric acid cannot be used: An antiseptic in medicine For washing eyes In soda bottles For enamels and glazes
20 Which element among the following belongs to Group IV-A of the periodic table? Barium Iodine Lead Oxygen
21 Which electronic configuration corresponds to an element of Group ||Z-A of the periodic table? 1s, 2s<sup>2</sup>, 2p<sup>6</sup>, 3s<sup>2</sup>, 3p<sup>6</sup>, 4s<sup>2</sup> 1s<sup>2 </sup>, 2s<sup>2</sup> , 2p<sup>6 </sup>, 3s<sup>2</sup>, 3p<sup>1</sup> 1s<sup>2</sup>, 2s<sup>2</sup>, 2p<sup>6</sup> 1s<sup>2</sup>, 2s<sup>2</sup>, 2p<sup>6</sup>, 3s<sup>2</sup>, 3p<sup>3</sup>
22 Which element forms an iron with charge 3+? Berylium Aluminium Carbon Silicon
23 Chemical composition of colemnite is: Ca<sub>2</sub>B<sub>6</sub>O<sub>11</sub>.5H<sub>2</sub>O CaB<sub>4</sub>O<sub>7</sub> .4 H<sub>2</sub>O Na<sub>2</sub>B<sub>7</sub>O<sub>7</sub>. 4 H<sub>2</sub>O CaNaB<sub>5</sub>O<sub>9</sub>.8H<sub>2</sub>O
24 Aluminium oxide is: Acidic oxide Basic oxide Amphoteric oxided None of these
25 Which metal is used in the thermit process because of its activity? Iron Copper Alumnium Zinc
26 The unit of rate constant is the same as that of the rate of reaction in : First order reaction. Second order reaction. Zero order reaction. Third order reaction.
27 With increases of 10°C temperature the rate of reactiondoubles. This increase in rate of reactionis due to :

 Decrease in activation energy or reaction. Decrease in number of collisions between reactant molecules. Increase in activation energy of reactants. Increase in number of effective collisions
28 The rate of reaction : Increase as the reaction proceeds. Decreases as the reaction proceeds. Remains the same as the reaction proceed. May decrease or increase as the reaction proceeds.
29 If the rate equation of a reaction 2A+B-------->Products is , Rate = K[A] [B], and A is present in large excess, then order of reaction is : 1 2 3 Above
30 In zero order reaction, the rate is independent of : Temperature of reaction Concentration ofreactants Concentration of products None of these.
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