The nucleon number and the proton number of a neutral atom of an element are 238 and 92 respectively. What is the number of neutrons in the atom?
A. 330 B. 165 C. 146 D. 119 E. 73 Correct Answer: Option C – 146
Which of the following statements about the atom is/are correct?
I. Energy is needed to remove electrons from an atom II. Particles in the nucleus of an atom are bound together by strong forces. III. A large amount of energy is required to separate the particles in the nucleus of an atom. IV. When the nucleus of a uranium atom is...
When the pressure of the gas in a discharge tube is gradually lowered; which of the following are correct?
I. there is a violet glow in the tube II. the glow in the tube splits into bands which get further apart. III. the glow and the bands eventually disappear and there is a green fluorescence in the tube. IV. the tube breaks into pieces. A. I and II only B. I and III...
Which of the following particles conduct electricity through salty water?
A. Atom B. molecules C. Electrons D. Neutrons E. Ions Correct Answer: Option E – Ions
Which of the following reduce(s) the effect of the back e.m.f. generated in the primary coil of an induction coil?
I. The capacitor in the circuit II. The make and break contact in the circuit III. The ratio of turns in the secondary to that in the primary A. l only B. II only C. I and II only D. II and III only E. I, II and III. Correct Answer: Option C – I and II...Products
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