Q1. Which of the following set contains same number of molecules?
A. 1 gram O₂, 2 gram SO₂
B. 1 gram CO₂, 1 gram N₂O
C. 1 gram CO, 1 gram N₂
D. 1 gram O₂, 1 gram O₃
(a) A, B and C
(b) A and B
(c) C and D
(d) none of the above
Q2. Which one of the following is not an example of electromagnetic waves?
(a) Ultraviolet rays
(b) Radio waves
(d) Sound waves in air
Q3. The example of thermosetting and thermoplastic polymer respectively is
(a) polystyrene, polyvinylchloride
(b) bakelite, polystyrene
(c) polyethene, polyacredonitrile
(d) polystyrene, urea-formaldehyde resin
Q4. Which of the following is not a ‘green house gas’?
Q5. Which of the following is weakest Lewis Base?
Q6. If the result of an experiment turn out to be different than what was expected, then it can be concluded that
(a) one has not followed scientific method
(b) one need to repeat the experiment till the desired results are obtained
(c) one must admit that the experiment was a failure
(d) one should explore the possible reasons for it in the conclusion section
Q7. The cooking gas is mainly a mixture of the following two gases
(a) Methane and Ethane
(b) Ethane and Propane
(c) Propane and Butane
(d) Butane and Pentane
Q8. In bryophyllum reproduction occurs
(a) through stem
(b) through leaf
(c) through flower
(d) through root
Q9. Radiation with maximum penetration power is
(a) infrared radiation
(b) ultraviolet radiation
Q10. The mass of man is 72 kg at Earth. The value of kg at the Moon’s surface is 1/6 of that on the Earth. The mass of man at the Moon will be
(a) 12 kg
(b) 120 kg
(c) 72 kg
(d) 432 kg
Sol. Sound waves are longitudinal waves.
Sol. Plastics are made of polymers which are obtained from monomers. Polymerization process has two types: thermoplastic and thermosetting.
Sol. Sulphur oxide is not classified as a green house gas.
Sol. A lewis base is any species that donates a pair of electrons to a Lewis acid to form a Lewis adduct.
Sol. A casual analysis need to be done to ascertain the exact reason for the different result.
Sol. Propane and butane are mixed in different proportions in LPG cylinders.
Sol. In bryophyllum, reproduction takes place through the asexual mode i.e., budding.
Sol. Gamma rays have the most penetrating powers