ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 Copper oxide is dedected by borax bead test with colour: Blue Red Yellow Black
2 Which is used to remove air bubbles form metals? B Be Mg Al
3 Which is used in navigational equipments? B Be Mg Al
4 Pb has inert pair of electrons: One Two Three Four
5 Which is not the form of silica? Amethyst quatz Rose quatz Smoky None of these
6 Silicon atom is hybridized: sp sp<sup>2</sup> sp<sup>3</sup> dsp<sup>2</sup>
7 Borax is hydrated: Penta Deca Hepta Octa
8 What is chrome yellow? Pbo Pb<sub>2</sub>O PbCrO<sub>4</sub> Pb<sub>3</sub>O<sub>4</sub>
9 Which is litharge or massicot? PbO Pb<sub>2</sub>O Pb<sub>3</sub>O<sub>4</sub> PbO<sub>2</sub>
10 What is going to replace the petroleum? Silica Silicates Silicones Silicon
11 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>
12 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
13 Tincal is a mineral of: Al B Si C
14 Which of the following elements is not present abundantly in earth's crust? Silicon Aluminium Sodium Oxygen
15 Boric acid cannot be used: An antiseptic in medicine For washing eyes In soda bottles For enamels and glazes
16 Which element among the following belongs to Group IV-A of the periodic table? Barium Iodine Lead Oxygen
17 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>
18 Which element forms an iron with charge 3+? Berylium Aluminium Carbon Silicon
19 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
20 Aluminium oxide is: Acidic oxide Basic oxide Amphoteric oxided None of these
21 Which metal is used in the thermit process because of its activity? Iron Copper Alumnium Zinc
22 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.
23 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
24 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.
25 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
26 In zero order reaction, the rate is independent of : Temperature of reaction Concentration ofreactants Concentration of products None of these.
27

Which technique is used to determine the absorption of radiations?

 <p class="MsoNormal">Dilatometer method<o:p></o:p></p> <p class="MsoNormal">Optical rotation method<o:p></o:p></p> <p class="MsoNormal">Spectrometry<o:p></o:p></p> <p class="MsoNormal">Refractometric method<o:p></o:p></p>
28 The rate of reaction : Decreases as the reaction proceeds Increases as the reaction proceeds May decrease or increase reaction proceeds Remains same as the reaction proceeds
29 Dilatometer method is useful for the reaction that involve : Small volume changes in solutions Change in infractive indices Where reactants absorb U.V, visible or infrared radiation
30 The rate of reaction b/w two specific time intervals is called : Instantaneous rate of reaction. Average rate of reaction. Rate of a reaction. Minimum rate of a reaction.
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