Atoms and molecules chapter Test Paper

JavaScript isn't enabled in your browser, so this file can't be opened. Enable and reload.

Atoms and molecules chapter Test Paper

K.V. NO.1 KUNJABAN AGARTALA-TRIPURA

Student Name *

Class *

Section *

Roll Number *

Question.1. The valency of nitrogen in NH3 is

1 point

Clear selection

Question.2. The formula of ethanol is C2H5OH. What will be its molecular mass?

1 point

46 u

34 u

34 g

46 g

Clear selection

Question.3. 1 u or 1 amu means

1 point

Mass of O-16 atom

Mass of Hydrogen molecule

1/12th mass of C-12 atoms

Mass of C-12 atom

Clear selection

Question 4. Which of the following statements is not true about an atom?

1 point

Atoms are not able to exist independently.

Atoms are the basic units from which molecules and ions are formed.

Atoms are always neutral in nature.

Atoms aggregate in large numbers to form the matter that we can see, feel or touch.

Clear selection

Question.5. The ratio of H:O by mass in hydrogen peroxide (H2O2) is

1 point

16 : 1

1 : 8

1 : 32

1 : 16

Clear selection

Question.6. Which of the following is incorrect statement for the atoms?

1 point

Nucleus of an atom is made up of protons and neutrons.

Atoms are made up of electrons, protons and neutrons.

Atoms are very tiny particles.

Atoms of different elements have same chemical properties.

Clear selection

Question.7. Adding electrons to an atom will result in a (an):

1 point

Molecule

Anion

Cation

Salt

Clear selection

Question.8. The molecule formula P2O5 means that:

1 point

A molecule contains 2 atoms of P and 5 atoms of O

The ratio of the mass of P to the mass of O in the molecule is 2:5

There are twice as many P atoms in the molecule as there are O atoms

The ratio of the mass of P to the ass of O in the molecule is 5:2

Clear selection

Question.9. What is the chemical formula of sodium carbonate?

1 point

Na2CO3

NaHCO3

NaCO3

Na2HCO3

Clear selection

Question.10. The total number of atoms represented by the compound CuSO₄.5H₂O is:

1 point

Clear selection

Submission Tracking ID - DO NOT CHANGE *

This is important for tracking purposes. Do not change. Any change in this will make your submission void

Submit

Clear form

Never submit passwords through Google Forms.

This content is neither created nor endorsed by Google. Report Abuse - Terms of Service - Privacy Policy

Forms