Explore topic-wise MCQs in Science.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.

1.

The electronic configuration of elements A, B, C and D are (2, 8, (a) (2, 8, (b) and (2, 8, 7) respectively. Which of them can make an ion with two negative charges.

A.  A   
B.  B
C.  Baking soda  
D.  D
Answer» D.  D
Discussion
2.

Neutron was discovered by

A.  Rutherford
B.  Langmuir
C.  Lemon seed  
D.  Austin
Answer» D.  Austin
Discussion
3.

The electronic configuration 2, 8, 8, 2 represents the element

A.  argon  
B.  potassium
C. Both statements are correct
D.  chlorine
Answer» D.  chlorine
Discussion
4.

Neutron is a fundamental particle carrying

A.  a charge of +1 and a mass of 1 unit
B.  no charge and a mass of 1 unit
C. Both statements are correct
D.  a charge of -1 and mass of 1 unit
Answer» C. Both statements are correct
Discussion
5.

Maximum number of electrons in any orbit is

A.  \[{{n}^{2}}\] 
B.  \[2{{n}^{2}}\]
C. Oxygen moves inside the cell.
D.  none of these
Answer» C. Oxygen moves inside the cell.
Discussion
6.

Number of protons, neutrons and electrons in the element\[_{89}{{\text{X}}^{\text{231}}}\]is

A.  89, 89, 242
B.  89, 142, 89
C. Sunflower plant
D.  89, 231, 89
Answer» C. Sunflower plant
Discussion
7.

Identify the element which has three isotopes with the neutrons, 6, 7, 8 respectively.

A.  Nitrogen
B.  Carbon
C. Grana  
D.  Neon
Answer» C. Grana  
Discussion
8.

    \[N{{a}^{+}}\] ion is isoelectronic with

A. \[L{{i}^{+}}\]    
B.  \[M{{g}^{2+}}\]
C. Smooth muscle tissue
D.  \[B{{a}^{2+}}\]
Answer» C. Smooth muscle tissue
Discussion
9.

What is the approximate thickness of the golden foil used in a-rays scattering experiment?

A.  1 m   
B.  0.05 cm
C. No change in the cell. 
D.  0.4 mm
Answer» D.  0.4 mm
Discussion