ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 Polyanion formation is maximum in Nitrogen Oxygen Sulphur Boron
2 When sulphur is boiled with Na2SO3solution, the compound formed is Sodium sulphides Sodiums sulphates Sodium persulphate Sodium thiosulphate
3 Oleum is Castor oil Oil of vitriol Fuming of H<sub>2</sub>SO<sub>4</sub> None of them
4 The number of unpaired electrons in the p-subshell of oxygen atom 1 2 3 4
5 Ozone is not An allotrope A powerful oxidizing agent Paramagnetic A bent molecule
6 Which of the following is acidic? SO<sub>3</sub> N<sub>2</sub>O BeO HgO
7 Which of the following oxides is peroxide? Na<sub>2</sub>O<sub>2</sub> MnO<sub>2</sub> BaO SO<sub>2</sub>
8 Bond angle is minimum for H<sub>2</sub>O H<sub>2</sub>S H<sub>2</sub>Se H<sub>2</sub>Te
9 Hypo is used in photography for Developing picture Picture printed The colour of picture The fixation of picture
10 As a fixing agent in photography, sodium thisoulphate is used for Dissolving out unreacted silver bromide Converting silver Reducing solubility of AgBr Preventing overdeveloping and fogging
11 The acid used in lead storage cells is Phosphoric acid Nitric acid Sulphuric acid Hydrochloric acid
12 Which of the following is a tetrabasic acid? ORthophosphoric acid Hyposphosphorus acid Metaphosphoric Pyrophosphoric acid
13 Basicity of orthoposphoric acid is 2 3 4 5
14 P2O5is heated with water to give Hypophosphorus acid Phosphorus acid Hypophosphorus acid Orthophosphorus acid
15 Sodium hexametaphophate is known as Calgon Permutite Natalite Nitrolim
16 When ammonia is heated with cupric oxide, a molecule of ammonia will Gain 3 electrons Lose 3 electrons Gain 2 electrons Lose 2 electrons
17 HNO2acts as an/a Acid Oxidizing agent Reducing agent All the three
18 Which of the following compounds is explosive in nature? Phosphorus trichloride Nitrogen trichloride Hyponitrous acid Nitrosyl chloride
19 What causes nitrogen to be chemically inert? Multiple bond formation in the molecule Absence of bond distance Short internuclear distance High bond energy
20 White phosphorus is A mono atomic gas P<sub>4</sub>, a tetrahedral solid P<sub>8</sub>, a crown A linear diatomic molecule
21 Which of the following has highest dipole moment? NH<sub>3</sub> PH<sub>3</sub> AsH<sub>3</sub> SbH<sub>3</sub>
22 Orthophosphoric acid is Monobasic Dibasic Tribasic Tetrabasic
23 Which oxide of nitrogen is obtained on heating ammonium nitrate at 250° C? Nitric oxide Nitrous oxide Nitrogen dioxide Dinitrogen tetraoxide
24 The oxyacids of phosphorus in which phosphorus has the lowest oxidiation state is Hypophosphorus acid Orthophosphorus acid Pyrophosphorus acid Metaphosphorus acid
25 The most acidic of the following compounds is P<sub>2</sub>O<sub>3</sub> Sb<sub>2</sub>O<sub>3</sub> B<sub>2</sub>O<sub>3</sub> As<sub>2</sub>O<sub>3</sub>
26 Which of the following phosphorus is most reactive? Red phosphorus White phosphorus Scrlet phosphorus Violet phosphorous
27 Which element form group 15 gives most basic compound with hydrogen? Nitrogen Bismuth Arsenic Phosphorus
28 Group VA of the periodic table consists of the elements N, P, As, Sb and Bi, On passing from N to Bi, the oxides of the elements of general formula M2O3become Stronger reducing agents More ionic More basic More volatile
29 The structure of white phosphorus is Square planar Pyramidal Tetrahedral Trigonal planer
30 Which one of the following pentafluorides cannot be formed? PF<sub>5</sub> AsF<sub>5</sub> SbF<sub>5</sub> BiF<sub>5</sub>
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