Chemistry MCQ Quiz Hub

1. The main constituent of biogas is
Butane
Methane
Hydrogen Sulphide
Carbondioxide

2. The element common to all acids is
Hydrogen
Oxygen
carbon
Sulphur

3. What is the molecular formula of Butyne?
c3H4
c4H6
c2H2
c4H10

4. The formula C6H14 represents the hydrocarbon
Hexene
Heptyne
Hexane
Hexyne

5. The bonds in the compound MgSO4 can be described as
covalent
ionic
both A & B
None of the above

6. 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
Cyclic rute
Zeroth law of thermodynamics
First law of thermodynamics
Second law of thermodynamics

7. Which combination will produce a precipitate?
NaOH (aq) and HCl (aq)
KOH (aq) and Mg(NO3)2 (aq)
NaC2H3O2(aq) and HCl (aq)
AgNO3(aq) and Ca(C2H2O3) (aq)

8. Discovery of the nucleus of an atom was due to the experiment carried out by
Bohr
Rutherford
Moseley
Thomson

9. Cathode rays are
electromagnetic wave
stream of alpha particle
stream of electrons
radiations

10. The maximum number of hydrogen bonds in a water molecule is...........
1
3
4
2

11. What element behaves most like magnesium?
Silicon
Strontium
Sulphur
Tin

12. The reactivity of an atom arises from
the existence of unpaired electrons in the valence shell
the energy differences between the electron shells
the sum of the potential energies of all the electron shells
the average distance of the outermost electron shell from the nucleus

13. Intermolecular forces in HCl are
Hydrogen bonding
Dipole-dipole
Dispersion force
All the above

14. What is the heaviest noble gas?
krypton
radon
helium
xenon

15. Which of the following statements about monosaccharide structure is true?
Aldoses and ketoses differ in the position of their hydroxyl groups.
Monosaccharides can be classified according to the spatial arrangement of their atoms.
All monosaccharides contain carbon hydrogen oxygen and nitrogen atoms.
A six-carbon sugar is called a pentose.

16. Select the correct statement (s).
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.
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.
Both (A) and (B)
None of the above

17. Which type of molecule is CF4?
nonpolar with a symmetrical distribution of charge
polar with an asymmetrical distribution of charge
nonpolar with an asymmetrical distribution of charge
polar with a symmetrical distribution of charge

18. Formation of anions occurs by
loss of neutrons
gain of protons
gain of electrons
none

19. An alloy is
a compound
an allotropic form
an isomer
a mixture

20. Which one of the following statements is not correct?
Fischer projection represents the molecule in an eclipsed conformation
Newman projection can be represented in eclipsed staggered and skew conformations
Fischer projection of the molecule is its most stable conformation
In Sawhorse projections the lines are inclined at an angle of 120 deg to each other.

21. Which of the following is NOT a property of bases?
They react with acids and neutralise them
They turn red litmus blue
They turn blue litmus red
They have bitter taste

22. Give a possible molecular formula for C3H5ClO?
C6H10Cl2O2
C6H10O2
C6H10ClO2
C6H12Cl2O2

23. The first indication that a stable nucleus can be broken down was afforded by
Rutherford
Madam Curie
Soddy
Schmidt

24. Cathode rays have
mass only
charge only
no mass and no charge
mass and charge both

25. A yellow element that stinks when burned
Sulphur
Chlorine
Fluorine
Bromine

26. When combining with nonmetallic atoms metallic atoms generally will
Lose electrons and forms cations
Gain electrons and forms anions
Lose electrons and forms anions
Gain electrons and forms cations

27. Dry distillation of calcium formate gives
HCOOH
CH3COOH
HCHO
CH3CHO

28. Trichloroacetaldehyde was subject to Cannizzaros reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another compound. The other compound is :
Chloroform
2 2 2-Trichloroethanol
Trichloromethanol
2 2 2-Trichloropropanol

29. The number of neutrons in dipositive Zinc ion is
34
36
38
40

30. Neutron was discovered by
J.J.Thomson
Chadwick
Rrutherford
Priestley

31. What is the oxidation number of carbon in NaHCO3?
-4
-3
4
2

32. The alpha-particles are
high energy electrons
positively charged hydrogen irons
high energy x ray radiations
double positively charged helium nuclei

33. According to the modern Periodic Law the properties of elements are periodic functions of their
volency
atomic mass
number of neutrons
atomic number

34. Washing soda is
sodium hydroxide
sodium carbonate
sodium bicorbonate
Potassium chloride

35. The activity of rradioisotope change with
temperature
pressure
chemical environment
None of these

36. Which subatomic particle has a negative charge?
Neutron
Proton
Ion
Electron

37. Which reaction occurs spontaneously?
Cl2(g) + 2NaF(aq)--> F2(g) + 2NaCl(aq)
I2(s) + 2NaF(aq)--> F2(g) + 2NaI(aq)
Cl2(g) + 2NaBr(aq)-->Br2(l) + 2NaCl(aq)
I2(s) + 2NaBr(aq)--> Br2(l) + 2NaI(aq)

38. What is the systematic name of PbO?
Plumbic oxide
Lead oxide
Lead(II) oxide
All of the above

39. A bond formed by the transfer of electrons betwwen atoms of the elements is called
ionic bond
covalent bond
co ordinate bond
none

40. Under which conditions are gases most soluble in water?
low pressure and low temperature
low pressure and high temperature
high pressure and low temperature
high pressure and high temperature

41. Leakage of which of the following gases caused the Bhopal gas tragedy ?
Carbon monoxide
Methyl isocyanate
Nitrous oxide
Hydrogen sulphide

42. The element that has the highest first ionization potential is.......
Oxygen
Carbon
Boron
Nitrogen

43. Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :
An acetylenic triple bond
Two ethylenic double bonds
A vinyl group
An isopropyl group

44. Which among the following noble gas has highest molar mass?
Kr
Ne
Ar
Xe

45. Group displacement law was given by
Bacquerel
Rutherford
Mendeleaf
Soddy and Fajan

46. Which one of the following elements cannot be detected by Lassaignes test?
I
Cl
S
F

47. What is the systematic name of NH4ClO3?
Ammonium Chloride
Ammonium Chlorate
Ammonium Chlorane
Ammonium Chlorine

48. Minamata disease was caused by ?
Lead
Mercury
Cadmium
Zinc

49. Standard Electrode potential is measured in terms of
Pyrometer
Electrometer
Thermometer
Voltmeter