Chemistry/Chemistry MCQ Questions Set-4 Sample Test,Sample questions

Question:
A bond formed by the transfer of electrons betwwen atoms of the elements is called

1.ionic bond

2.covalent bond

3.co ordinate bond

4.none


Question:
A yellow element that stinks when burned

1.Sulphur

2.Chlorine

3.Fluorine

4.Bromine


Question:
According to the modern Periodic Law the properties of elements are periodic functions of their

1.volency

2.atomic mass

3. number of neutrons

4. atomic number


Question:
An alloy is

1. a compound

2.an allotropic form

3.an isomer

4.a mixture


Question:
Cathode rays are 

1.electromagnetic wave

2.stream of alpha particle

3.stream of electrons

4.radiations


Question:
Cathode rays have

1. mass only

2.charge only

3. no mass and no charge

4.mass and charge both


Question:
Discovery of the nucleus of an atom was due to the experiment carried out by

1.Bohr

2.Rutherford

3.Moseley

4.Thomson


Question:
Dry distillation of calcium formate gives

1.HCOOH

2.CH3COOH

3.HCHO

4.CH3CHO


Question:
Formation of anions occurs by

1.loss of neutrons

2.gain of protons

3.gain of electrons

4.none


Question:
Give a possible molecular formula for C3H5ClO?

1.C6H10Cl2O2

2.C6H10O2

3.C6H10ClO2

4.C6H12Cl2O2


Question:
Group displacement law was given by

1.Bacquerel

2.Rutherford

3.Mendeleaf

4.Soddy and Fajan


Question:
If a system A is in thermal equilibrium with B and B is in thermal equilibrium with C then A and C are in equilibrium with each other. This is a statement of 

1.Cyclic rute

2. Zeroth law of thermodynamics

3. First law of thermodynamics

4.Second law of thermodynamics


Question:
Intermolecular forces in HCl are

1.Hydrogen bonding

2.Dipole-dipole

3. Dispersion force

4.All the above


Question:
Leakage of which of the following gases caused the Bhopal gas tragedy ?

1.Carbon monoxide

2.Methyl isocyanate

3.Nitrous oxide

4. Hydrogen sulphide


Question:
Minamata disease was caused by ?

1.Lead

2.Mercury

3.Cadmium

4.Zinc


Question:
Neutron was discovered by

1.J.J.Thomson

2.Chadwick

3.Rrutherford

4.Priestley


Question:
Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :

1. An acetylenic triple bond

2. Two ethylenic double bonds

3. A vinyl group

4.An isopropyl group


Question:
Select the correct statement (s).

1. When energy is transferred to the system from the surrounding as work the surrounding do work on the system and the value of work (W) positive.

2.When energy is transferred from the system to the surrounding as work work is done on the surrounding and the value of W is negative.

3.Both (A) and (B)

4. None of the above


Question:
Standard Electrode potential is measured in terms of

1.Pyrometer

2.Electrometer

3.Thermometer

4.Voltmeter


Question:
The activity of rradioisotope change with

1.temperature

2.pressure

3.chemical environment

4.None of these


Question:
The alpha-particles are

1.high energy electrons

2.positively charged hydrogen irons

3.high energy x ray radiations

4. double positively charged helium nuclei


Question:
The bonds in the compound MgSO4 can be described as

1.covalent

2.ionic

3.both A & B

4.None of the above


Question:
The element common to all acids is

1.Hydrogen

2.Oxygen

3.carbon

4.Sulphur


Question:
The element that has the highest first ionization potential is.......

1.Oxygen

2.Carbon

3.Boron

4.Nitrogen


Question:
The first indication that a stable nucleus can be broken down was afforded by

1.Rutherford

2. Madam Curie

3.Soddy

4.Schmidt


Question:
The formula C6H14 represents the hydrocarbon 

1.Hexene

2.Heptyne

3.Hexane

4.Hexyne


Question:
The main constituent of biogas is

1.Butane

2.Methane

3.Hydrogen Sulphide

4.Carbondioxide


Question:
The maximum number of hydrogen bonds in a water molecule is...........

1.1

2.3

3.4

4.2


Question:
The number of neutrons in dipositive Zinc ion is

1.34

2.36

3.38

4.40


Question:
The reactivity of an atom arises from 

1.the existence of unpaired electrons in the valence shell

2.the energy differences between the electron shells

3. the sum of the potential energies of all the electron shells

4. the average distance of the outermost electron shell from the nucleus


Question:
Trichloroacetaldehyde was subject to Cannizzaros reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another compound. The other compound is :

1.Chloroform

2. 2 2 2-Trichloroethanol

3.Trichloromethanol

4.2 2 2-Trichloropropanol


Question:
Under which conditions are gases most soluble in water?

1.low pressure and low temperature

2.low pressure and high temperature

3.high pressure and low temperature

4.high pressure and high temperature


Question:
Washing soda is 

1. sodium hydroxide

2.sodium carbonate

3.sodium bicorbonate

4.Potassium chloride


Question:
What element behaves most like magnesium?

1.Silicon

2.Strontium

3.Sulphur

4.Tin


Question:
What is the heaviest noble gas?

1.krypton

2.radon

3.helium

4.xenon


Question:
What is the molecular formula of Butyne?

 

1.c3H4

2.c4H6

3.c2H2

4.c4H10


Question:
What is the oxidation number of carbon in NaHCO3?

1.-4

2.-3

3.4

4.2


Question:
What is the systematic name of NH4ClO3?

1.Ammonium Chloride

2.Ammonium Chlorate

3.Ammonium Chlorane

4.Ammonium Chlorine


Question:
What is the systematic name of PbO?

1. Plumbic oxide

2.Lead oxide

3.Lead(II) oxide

4. All of the above


Question:
When combining with nonmetallic atoms metallic atoms generally will

1.Lose electrons and forms cations

2. Gain electrons and forms anions

3.Lose electrons and forms anions

4.Gain electrons and forms cations


Question:
Which among the following noble gas has highest molar mass?

 

1.Kr

2.Ne

3.Ar

4.Xe


Question:
Which combination will produce a precipitate?

1.NaOH (aq) and HCl (aq)

2.KOH (aq) and Mg(NO3)2 (aq)

3. NaC2H3O2(aq) and HCl (aq)

4.AgNO3(aq) and Ca(C2H2O3) (aq)


Question:
Which of the following is NOT a property of bases?

 

1. They react with acids and neutralise them

2.They turn red litmus blue

3. They turn blue litmus red

4.They have bitter taste


Question:
Which of the following statements about monosaccharide structure is true?

1.Aldoses and ketoses differ in the position of their hydroxyl groups.

2.Monosaccharides can be classified according to the spatial arrangement of their atoms.

3.All monosaccharides contain carbon hydrogen oxygen and nitrogen atoms.

4.A six-carbon sugar is called a pentose.


Question:
Which one of the following elements cannot be detected by Lassaignes test?

1.I

2.Cl

3.S

4.F


Question:
Which one of the following statements is not correct?

 

1.Fischer projection represents the molecule in an eclipsed conformation

2.Newman projection can be represented in eclipsed staggered and skew conformations

3.Fischer projection of the molecule is its most stable conformation

4.In Sawhorse projections the lines are inclined at an angle of 120 deg to each other.


Question:
Which reaction occurs spontaneously?

1.Cl2(g) + 2NaF(aq)--> F2(g) + 2NaCl(aq)

2.I2(s) + 2NaF(aq)--> F2(g) + 2NaI(aq)

3.Cl2(g) + 2NaBr(aq)-->Br2(l) + 2NaCl(aq)

4.I2(s) + 2NaBr(aq)--> Br2(l) + 2NaI(aq)


Question:
Which subatomic particle has a negative charge?

 

1.Neutron

2.Proton

3.Ion

4.Electron


Question:
Which type of molecule is CF4?

1.nonpolar with a symmetrical distribution of charge

2.polar with an asymmetrical distribution of charge

3.nonpolar with an asymmetrical distribution of charge

4.polar with a symmetrical distribution of charge


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