Chemistry practice Test 1

Q. 1
The theory which could explain the law of chemical composition is
  • a. Avogadro’s law
  • b. Gay Lussac’s law
  • c. Dalton’s atomic theory
  • d. Antoine Lavoisier theory
  • e. None of these
  • Answer: A

Q. 2
The rate at which a gas escapes through a pin-hole into a vacuum is called
  • a. Diffusion
  • b. Effusion
  • c. Decomposition
  • d. Displacement
  • e. Evaporation
  • Answer: A

Q. 3
Pick out the correct example for semi-conductors
  • a. NaCl
  • b. Si-Ge
  • c. Nb3Ge alloy
  • d. Sulphur compound
  • e. SiO2
  • Answer: A

Q. 4
Which of the following binary systems is completely miscible on raising the temperature?
  • a. Phenol-H2O
  • b. Aniline-Hexane
  • c. H2O-Aniline
  • d. Carbon disulphide-Methyl alcohol
  • e. All of these
  • Answer: A

Q. 5
The oxidation number of a Group VIIA element in a compound is
  • a. +1
  • b. -1
  • c. 0
  • d. +2
  • e. Depends upon the element combined with an electronegative atom
  • Answer: A

Q. 6
When the pressure of the system remains constant during each step of a process, such process is said to be
  • a. Isothermal process
  • b. Adiabatic process
  • c. Isochoric process
  • d. Isobaric process
  • e. None of these
  • Answer: A

Q. 7
Which is the first element in the periodic table to have ‘4d’ electrons in its electronic configuration?
  • a. Ca
  • b. Sc
  • c. Rb
  • d. Y
  • e. La
  • Answer: A

Q. 8
Among the following, which group of elements have the maximum ionisation energy?
  • a. Alkali elements
  • b. Chalcogens
  • c. Halogens
  • d. Noble gases
  • e. Both B and C
  • Answer: A

Q. 9
When a covalent bond breaks in such a way that the shared pair of electrons stay on any one of the bonded atoms, such a reaction is called
  • a. Decomposition reaction
  • b. Homolytic fission reaction
  • c. Heterolytic fission reaction
  • d. Free radical addition reaction
  • e. Thermal fission
  • Answer: A

Q. 10
Pick out the correct statement.
  • a. Red litmus paper is used to identify acids
  • b. Dry litmus paper is used to test water-soluble gas
  • c. Blue litmus paper is used to identify acids
  • d. Blue litmus paper is used to identify bases
  • e. None of these
  • Answer: A

Q. 11
The NMR spectrum of ethylene glycol molecule will have
  • a. Two singlets
  • b. A triplet and a doublet
  • c. Two doublets
  • d. A singlet and a doublet
  • e. Two triplets
  • Answer: A

Q. 12
Which of the following is a Bronsted-Lowry acid?
  • a. CH2=CH2
  • b. CH3NH2
  • c. CH3CO2H
  • d. CH3COCH3
  • e. C6H10
  • Answer: A

Q. 13
Choose the correct phrase(s) for the following half-cell reaction.
Cu2+ (aq) + 2e- ➝ Cu(s)
I. It is a reduction reaction.
II. Reaction takes place in anode
III. Cu2+ is an oxidising agent.
  • a. I & II
  • b. I & III
  • c. II & III
  • d. I only
  • e. II only
  • Answer: A

Q. 14
The scale which is based on an empirical relation between the energy of a bond and the electro negativities of bonded atoms is
  • a. Pauling scale
  • b. Mulliken’s scale
  • c. Sanderson’s scale
  • d. Alfred and Rochow’s scale
  • e. Both A and B
  • Answer: A

Q. 15
Systematic error is also called
  • a. Experimental error
  • b. Random error
  • c. Indeterminate error
  • d. Determinate error
  • e. None of these.
  • Answer: A

Score: 0/15