ECAT Chemistry Chapter 1 Basic Concepts Online Test With Answers

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ECAT Chemistry Chapter 1 Basic Concepts Online Test

Sr. # Questions Answers Choice
1 Benzene is stable to: Oxidation Nitration KMnO<sub>4</sub> SULPHONATION
2 Formation of a cation is: Exothermic process Non-endothermic process Endothermic process None of above
3 An ion bearing positive charge is called: Cation Positron Anion None of above
4 A species having positive or negative charge is called: Electron Ion Proton Atom
5 Which statement about molecule is incorrect ? Molecules of a substance are similar Hemoglobin is a homo atomic molecules Oxygen molecule is a macro molecule It exist independently
6 Which statement about an atom is true ? The number of neutrons is not equal to number of electrons Mass number is less than atomic number All the elements have only one mass number Mass number can be equal to atomic number
7 In molecules kinetic and potential energies are: Definite Moderate Indefinite None of above
8 Molecules of High molecular weight usually greater than 10,000 are called: Macro molecules Mega molecules Poly molecules Gega molecules
9 Hemoglobin contains nearly: 10,000 atoms 100 atoms 1000 atoms 1 atom
10 Hemoglobin is 68000 times heavier than:

 Oxygen atom Nitrogen atom Carbon atom Hydrogen atom
11 NH3, HCL, H2O, HL are: <p class="MsoNormal"><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Diatomic molecules</span><o:p></o:p></p> <p class="MsoNormal"><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Poly-atomic molecules</span><o:p></o:p></p> <p class="MsoNormal"><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Mono-atomic molecules</span><b><o:p></o:p></b></p> <p class="MsoNormal"><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Heter</span>o atomic molecules<o:p></o:p></p>
12 He Ar and Ne are: <span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Mono-atomic molecules</span> <p class="MsoNormal"><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Heter</span>o atomic molecules<o:p></o:p></p> <p class="MsoNormal"><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Poly-atomic molecules</span><o:p></o:p></p> <p class="MsoNormal"><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Diatomic molecules</span><o:p></o:p></p>
13 CL2, N2 and O2 are: <p class="MsoNormal"><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Diatomic molecules</span><o:p></o:p></p> <p class="MsoNormal"><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Heter</span>o atomic molecules<o:p></o:p></p> <p class="MsoNormal"><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Poly-atomic molecules</span><o:p></o:p></p> <span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Mono-atomic molecules</span>
14 C6H12O6and C12H22O11 are: Mono-atomic molecules Diatomic molecules Poly-atomic molecules <p class="MsoNormal"><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Heter</span>o atomic molecules<o:p></o:p></p>
15 The number of subatomic particles in atoms sidcovered is more than: 110 100 125 90
16 Atoms can be evident by use of electron microscope, field ionization microscope and: x-rays Video camera<div><br></div> Telescope Compound microscope
17 Determination of atomic masses and invention of system of writing symbols was made by: J. Berzelius Democritus Dalton None of above
18 First atomic theory was put forward by an English school teacher: Maxewell Newton Sanger John Dalton
19

Metal tend to lose electrons, becoming:

 <p class="MsoNormal">Metals<o:p></o:p></p> <p class="MsoNormal">Positively charged<o:p></o:p></p> <p class="MsoNormal">Negatively charged<o:p></o:p></p> <p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><span style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: normal;"> (a)</span><span style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: &quot;Times New Roman&quot;;"></span><!--[endif]-->And (c)<o:p></o:p></p>
20 Atoms and molecules can either gain or lose electrons, forming charge particles called: <p class="MsoNormal">Positrons<o:p></o:p></p> <p class="MsoNormal">Photons<o:p></o:p></p> <p class="MsoNormal">Ions<o:p></o:p></p> <p class="MsoNormal">Electrons<o:p></o:p></p>
21

Covalent compound s mostly exist in the form of:

 <p class="MsoNormal">Protons<o:p></o:p></p> <p class="MsoNormal">Atoms<o:p></o:p></p> <span style="font-size:11.0pt;line-height:107%; font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;mso-ascii-theme-font:minor-latin;mso-fareast-font-family: Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin; mso-bidi-font-family:&quot;Times New Roman&quot;;mso-bidi-theme-font:minor-bidi; mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Neutrons</span> <p class="MsoNormal">Molecules<o:p></o:p></p>
22

The diameter of atoms is of the order:

 2* 10<sup>-5</sup>m <p class="MsoNormal">2* 10<sup>-10 </sup>m<sup><o:p></o:p></sup></p> 2* 10<sup>-2</sup>m 2* 10<sup>-3</sup>m
23 CO+ is an example of Stable molecule Anionic molecule ion Cationic molecular ion Free radical
24 When an electron is added to a uni positive ion we get: Cation Molecule Neutral atom Anion
25 The number of atoms present in molecule determines its: Molecularity Atomicity Basicity Acidity
26 Matter is defined as any thing which occupies space and: Molecules Mass Compound Molecules
27 Smallest particle of an element which may or may not have independent existence is known as: A molecule An ion An atom An electron
28 The branch of science dealing with structure, composition and changes in matter and laws and principles which govern these changes is called as chesmistry Geology Physics Mechanics
29 Isotopes differ in properties which depend upon mass arrangement of electrons in orbitals chemical properties the extent to which they may be affected in electric fields
30 The number of isotopes of gold is 3 1 2 4
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