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- 1. Multiple Choice
What is the chemical formula of sodium carbonate?
Na2CO3
NaHCO3
NaCO3
Na2HCO3
- 2. Multiple Choice
Which of the following is the correct pair of atom and it's atomic symbol?
Sulphur-Su
Potassium-P
Phosphorus-P
Sodium-S
- 3. Multiple Choice
Number of moles present in 28 gm of Nitrogen atoms are
1
2
3
4
- 4. Multiple Choice
The reference standard used for defining atomic mass unit is
H-1
C-13
O-16
C-12
- 5. Multiple Choice
How many H atoms are in H2O?
1
2
- 6. Multiple Choice
Which law states that mass can neither be created nor be destroyed and given by ______________________.
Law of conservation.
Law of definite, Antonie Lavoisier
Law of conservation, Proust
None of the above
- 7. Multiple Choice
Which law states that mass can neither be created nor be destroyed?
LAW OF MULTIPLE PROPORTION
LAW OF CONSERVTION OF MASS
LAW OF CONSTANT PROPORTION
LAW OF CONSTANT PROPORTION
- 8. Multiple Choice
Which law states that in a chemical substance the elements are always present in definite proportion by mass and given by ______________________
Law of conservation of mass, Proust
Law of constant proportion,Lavosier
Law of constant proportion, Proust
None of the above
- 9. Multiple Choice
______________ is the smallest particle that takes part in a chemical reaction.
Molecule
Compound
Atoms
Ion
- 10. Multiple Choice
What is gold?elementcompoundmixture - Answer choicesTagsAnswer choicesTags