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.
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