Practice Gk questions set 2 - general science mcq Online Quiz (set-1) For All Competitive Exams

Q-1)   Which is the symbol of the element tungsten?

(a)

(b)

(c)

(d)

Q-2)   What is the number of mole(s) of H2 (g) required to saturate one-mole benzene?

(a)

(b)

(c)

(d)

Explanation:

Q-3)   Regarding the atom of a chemical element, the magnetic quantum number refers to

(a)

(b)

(c)

(d)

Q-4)   Which of the following has a charge of +1 and a mass of 1 amu ?

(a)

(b)

(c)

(d)

Q-5)   Match List-I with List-II and select the correct answer using the code given below the lists.
List-I (Characteristic) List-II (Particle)
A. Zero mass 1. Positron
B. Fractional charge 2. Neutrino
C. Fractional spin 3. Quark
D. Integral spin 4. Photon

(a)

(b)

(c)

(d)

Explanation:

Q-6)   The nucleus of an atom contains

(a)

(b)

(c)

(d)

Explanation:

The nucleus contains protons and neutrons whereas electrons revolves around the nucleus in circular orbits.

Q-7)   Match List-I with List-II and select the correct answer using the code given below the lists.
List-I (Scientist) List-II (Discovery)
A. Goldstein 1. Atomic theory
B. Chadwick 2. Proton
C. JJ Thomson 3. Neutron
D. John Dalton 4. Electron
Code: A B C D

(a)

(b)

(c)

(d)

Explanation:

Q-8)   The following questions consist of two statements, one labelled as the Assertion (A) and the other as 'Reason (R), You are to examine these two statements carefully and select the answers to these items using the codes given below:
Assertion (A) :
Atomic weights of most of the elements are not whole numbers.
Reason (R) :
Atoms of most of the elements contain mixture of isotopes having different atomic weights.

(a)

(b)

(c)

(d)

Q-9)   Which would be the electrical charge on a sulphur atom containing 18 electrons ?

(a)

(b)

(c)

(d)

Explanation:

S(16) = 2, 8, 6

Hence S(18) need two or more electron to complete its octet.

i.e S + 2e– ⟶ S– –

Q-10)   The cathode ray experiment was done for the first time by

(a)

(b)

(c)

(d)