Practice Gk questions set 3 - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) Which of the following elements does not lose an electron easily?
(a)
(b)
(c)
(d)
F has a tendency to gain an electron.
Q-2) Which among the following atoms has high atomic radi?
(a)
(b)
(c)
(d)
Q-3) The metal which is hard and has high m.p. and used in electric bulbs is
(a)
(b)
(c)
(d)
Tungsten (W) is used in electric bulbs.
Q-4) The lightest liquid metal is
(a)
(b)
(c)
(d)
Cs is a metal. It is liquid at room temperature. It is lighter than Hg (also a liquid metal).
Q-5) Consider the following equation for the formation of ammonia from nitrogen and hydrogen:
N2 + 3H2 = 2NH3
How many hydrogen molecules are required to react with 100 molecules of nitrogen?
(a)
(b)
(c)
(d)
Q-6) Which of the following is/are the example/examples of chemical change?- Crystallization of sodium chloride
- Melting of ice
- Souring of milk
Select the correct answer using the code given below.
(a)
(b)
(c)
(d)
Q-7) Consider the following statements with reference to the periodic table of chemical elements:- Ionisation potential gradually decreases along a period
- In a group of elements, electron affinity decreases as the atomic weight increases
- In a given period, electronegativity decreases as the atomic number increases
Which of these statement (s) is/are correct?
(a)
(b)
(c)
(d)
Q-8) According to Newland’s law of octaves, which element is the repetition of the first element in the periodic table?
(a)
(b)
(c)
(d)
Q-9) Which one of these group of elements is also called the halogen family?
(a)
(b)
(c)
(d)
Q-10) Consider the following statements regarding Bohr atomic model:
- It introduces the idea of stationary orbits.
- It assumes that the angular momentum of the electron is equal to -$(1/2)h/{2π}$
- It uses the planetary model of the atom involving circular orbits.
Which of the statements given above are correct?
(a)
(b)
(c)
(d)
According to Bohr, model electrons revolve around the nucleus in stationary orbits.
The angular momentum of these orbits is an integral multiple of $h/{2π}$.
It uses a planetary model of the atom involving circular orbits.