Download App

Some Basic Concepts of Chemistry — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistrySome Basic Concepts of Chemistry3 Marks
Question
If two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element, are in whole number ratio.
  1. Is this statement true?
  2. If yes, according to which law?
  3. Give one example related to this law.
✓

Answer

  1. Yes, the statement is true.
  2. According to law of multiple proportions.
  3. Hydrogen and oxygen react to produce two compounds, water and hydrogen peroxide. Masses of oxygen which combine with fixed mass of hydrogen are in simple ratio.

 $\text{H}_2+\frac{1}{2}\text{O}_2\rightarrow\text{H}_2\text{O}\\^{2\text{g}}\ \ \ \ \ \ \ ^{16\text{g}}\ \ \ \ \ \ \ ^{18\text{g}}$

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 "3 Marks Question" from Some Basic Concepts of Chemistry→Some Basic Concepts of Chemistry — all question types→Chemistry STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

What is the hybridisation of each carbon in H2C = C = CH2.
→
5.975g of the higher oxide of metal gave 5.575g of lower oxide on heating. The quantity of the lower oxide gave 5.175g of metal on reduction. Prove that these results are in accordance with the law of multiple proportions.
→
For the following compound, write structural formulas and IUPAC names for all possible isomers having the number of double or triple bond as indicated:
C4H8 (one double bond).
→
Calculate:
  1. Mass in grams of 5.8mol of N2O.
  2. Number of moles in 8.0g of O2.
  3. Molar mass of 11.2L at STP weighs 8.5g.
→
The density of 3 molal solution of NaOH is 1.110g mL–1. Calculate the molarity of the solution.
→
Calculate the amount of $KCIO _3$ needed to supply sufficient oxygen for burning 112 L of CO gas at NTP.
→
How would you react to the statement that the electronegativity of N on Pauling scale is 3.0 in all the nitrogen compounds?
→
According to de Broglie, matter should exhibit dual behaviour, that is both particle and wave like properties. However, a cricket ball of mass 100g does not move like a wave when it is thrown by a bowler at a speed of 100km/h. Calculate the wavelength of the ball and explain why it does not show wave nature.
→
Neon gas is generally used in the sign boards. If it emits strongly at 616 nm , calculate (a) the frequency of emission, (b) distance travelled by this radiation in 30 s , (c) energy of quantum and (d) number of quanta present if it produces 2 J of energy.
→
A sample of HI(g) is placed in flask at a pressure of 0.2 atm. At equilibrium the
partial pressure of HI(g) is 0.04 atm.
What is Kp for the given equilibrium?
$\text{2HI (g)}\rightleftharpoons\text{H}_2\text{ (g) + I}_2\text{ (g)}$
→