ECAT Pre Engineering Chemistry Chapter 14 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 14 Group IIIA & IVA Elements

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ECAT Chemistry Chapter 14 Group IIIA & IVA Elements

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Question # 1

In a group IIA from top to bottom as the atomic number increases, there is regular decreases in

Question # 2

Which one of the following elements occurs free in nature?

Question # 3

Which of the following elements is most metallic?

Question # 4

The element caesium bears resemblance with

Question # 5

Which will have the maximum value of heat of hydration

Question # 6

Which of the following equations represents the action of heat on NaHCO3

Question # 7

Gypsum is applied to the soil to provide calcium and

Question # 8

Which salt is used for preserving food

Question # 9

The formula of lime stone is

Question # 10

The chemical formula of magnesite is

Question # 11

The electrolytic cell used for the production of metallic sodium is known as

Question # 12

All the elements of oxygen family are

Question # 13

Which is not the form of silica?

Question # 14

Borax is hydrated:

Question # 15

The acid which has a peroxy linkage is

Question # 16

Down's cell is used to prepare

Question # 17

All the following decompose easily on heating to give oxygen except

Question # 18

______ reacts with alkalis to give hydrogen

Question # 19

Each of the following is true of white and red phosphours except that they

Question # 20

Sodium should be stored in

Question # 21

Sodium forms largely

Question # 22

Which of the following elements is not present abundantly in earth's crust?

Question # 23

NaHCO3is prepared by

Question # 24

Which of the following sulphates is not soluble in water

Question # 25

LiOH ______ soluble than NaOH

Question # 26

P2O5is heated with water to give

Question # 27

As a fixing agent in photography, sodium thisoulphate is used for

Question # 28

A compound used as eye wash:

Question # 29

Which of the following compounds is explosive in nature?

Question # 30

Which of the following element is most reactive

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Sr.# Question Answer
1 Which of the following salt is used as purgative
A. CaSO4
B. MgSO4
C. BeSO4
D. NaCl
2 Which of the following is a tetrabasic acid?
A. ORthophosphoric acid
B. Hyposphosphorus acid
C. Metaphosphoric
D. Pyrophosphoric acid
3 Silicon atom is hybridized:
A. sp
B. sp2
C. sp3
D. dsp2
4 The chemical formula of magnesite is
A. MgCl2
B. Mg(HCO3)2
C. MgCO3
D. None of these
5 Corrundam is ore of:
A. Li
B. Be
C. B
D. Al
6 Baking powder has which one of the following formula
A. Na2CO3
B. Na2SO4
C. NaHCO3
D. K2CO3
7 Which of the following fluorides does not exists?
A. NF5
B. PF5
C. AsF5
D. SbF5
8 Lime, calcium oxide, is used in agriculture for
A. Adding ca metal in soil
B. Making soil acidic
C. Neutralizing acidic soil
D. Adding oxygen to soil
9 When a colourless gas is passed through bromine water only decolourisation takes place the gas is
A. SO2
B. HBR
C. HCl
D. H2S
10 Calcium carbide reacts with water to produce
A. Acetylene
B. Methane
C. Ethylene
D. Ethane
11 The metal with highest electrical resistance at room temperature is
A. Pb
B. Te
C. Po
D. Fe
12 Which metal is used in the thermit process because of its activity?
A. Iron
B. Copper
C. Alumnium
D. Zinc
13 Which of the following salt is soluble in water
A. CaCO3
B. CaSO4
C. MgSO4
D. BaSO4
14 P2O5is heated with water to give
A. Hypophosphorus acid
B. Phosphorus acid
C. Hypophosphorus acid
D. Orthophosphorus acid
15 Where lime is not used
A. In refining or metals
B. In paper industry
C. In glass industry
D. In the preparation of NaOH
16 Pb has inert pair of electrons:
A. One
B. Two
C. Three
D. Four
17 HNO2acts as an/a
A. Acid
B. Oxidizing agent
C. Reducing agent
D. All the three
18 The number of unpaired electrons in the p-subshell of oxygen atom
A. 1
B. 2
C. 3
D. 4
19 Polyanion formation is maximum in
A. Nitrogen
B. Oxygen
C. Sulphur
D. Boron
20 Which of the following is lighter
A. Li
B. k
C. Na
D. Ca
21 Orthophosphoric acid is
A. Monobasic
B. Dibasic
C. Tribasic
D. Tetrabasic
22 As a fixing agent in photography, sodium thisoulphate is used for
A. Dissolving out unreacted silver bromide
B. Converting silver
C. Reducing solubility of AgBr
D. Preventing overdeveloping and fogging
23 Sodium forms largely
A. Normal oxides
B. Per-oxides
C. Superoxides
D. None of these
24 Marble is chemically
A. CaCl2
B. CaCO3
C. Na2CO3
D. NaHCO3
25 The alkaline earth elements have in their s-orbital
A. One electron
B. Two electron
C. No electron
D. Three electron
26 On alkali and alkaline earth metals down the group, there is decreasing trend in
A. m.p.
B. b.p.
C. Ionization potentiall
D. All of these
27 Which will have the maximum value of heat of hydration
A. Na+
B. Cs+
C. Ba+2
D. Mg+2
28 Bond angle is minimum for
A. H2O
B. H2S
C. H2Se
D. H2Te
29 Which is used to remove air bubbles form metals?
A. B
B. Be
C. Mg
D. Al
30 Electron affinity of sulphur is
A. More than O and Se
B. More than O but less than Se
C. Less than O but more than Se
D. Equal to O and Se

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