Advertisements
Advertisements
प्रश्न
Does the solubility of a substance change with temperature? Explain with the help of an example.
उत्तर
Yes, the solubility of a substance changes with temperature. It generally increases with temperature. More sugar can be dissolved in hot water as compared to cold water.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
An ion with negative charge is called _______
Define: Relative atomic mass
What are orbits or shells ?
State Dalton’s atomic theory.
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is such a particle called ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the charge on the particle ?
Fill in the blank
A deficiency of electrons produces a ________ charge.
What are the building blocks of matter ?
How is the size of an atom indicated ?
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
Is it possible to see atoms these days ? Explain your answer.
Match the pairs.
Group 'A' | Group 'B' |
a. Proton | i. Negatively charged |
b. Electron | ii. Neutral |
c. Neutron | iii. Positively charged |
Draw the electron dot structure of this compound.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
What will be the charge present of the molecule XY after chemical combination?
Define the following term with an example.
Non-metal
The number of atoms present in a molecule is called its ______.
The graphite refill used is pencil is made of element called ______.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
The first scientific theory about atoms was given by J J. Thomson.