Ask a Teacher

Search

CBSE / Chemistry Questions

Total Questions 1082
why combustion occurs?how
which is the chemical used in LPG to give out the smell on it ?
which chemical is used to give out smell for LPG fuel
what is rain water harvesting?
what is dew?
name the two main gases present in air?
what is covalent bond ?
Out of the three elements P, Q and R having atomic numbers 11, 17 and 19 respectively which two elements will show similar properties and why ?
what are noble gases ?
what will happen if hydrogen molecule forms ionic bond,i.e, one hydrogen loses one electron and other gains an electron
what is precipitation?
what do you mean by catalyst
properties of covalent bond
how chloro fluoro carbons are dangerous to the ozone layer?
explain the reaction involved in burning of magnesium ribbon.
what is a chemical change and physical change with examples
WHAT IS SMOKE? HOW IS IT FORMED?
compare and contrast the arrangements of elements in Mendeleev's periodic table and Moseley's periodic table
While going across a period , what changes happento elements? [points]
PERIODIC TABLE DEVELOPED BY Newland .explain with points its limitations ,drawbacks and acheivements. {chap periodic classification of elements ]