Download App

Atoms and Molecules — Science STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9ScienceAtoms and Molecules2 Marks
Question
Which law states, that in a chemical compound, elements always combine in a fixed proportion?
✓

Answer

In chemistry, the law of definite proportion, sometimes called Proust's law or the law of definite composition, or law of constant composition states that a given chemical compound always contains its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Que-Ans (Each of 2 Mark )" from Atoms and Molecules→Atoms and Molecules — all question types→Science STD 9 question papers→Rajasthan Board STD 9 question papers→Rajasthan Board question paper generator→

Similar questions

Name the chemical compound contains in nail$-$polish remover.
→
How much momentum will a dumb$-$bell of mass $10\ kg$ transfer to the floor if it falls from a height of $80\ cm$? Take its downward acceleration to be $10\ m s^{-2}.$
→
Define buoyant force. Name two factors on which buoyant force depends.
→
What is the significance of the formula of a substance?
→
In which condition, law of conservation of momentum is applicable?
→
What is light microscope?
→
Complete the Table on the basis of information available in the symbols given below:
$a.\  ^{35}_{17}\text{Cl}$
$b.\  ^{12}_{6}\text{C}$
$c.\  ^{81}_{35}\text{Br}$
Element $n_p$ $n_n$
     
→
What is the number of molecules in $1.5 \ moles$ of ammonia?
→
A cricket ball is seen to hit the bat first and the sound of hitting is heard a little later. Why?
→
On what factor does the inertia of a body depend? Which has more inertia, a cricket ball or a rubber ball of the same size?
→