Matter in Our Surroundings — Science STD 9 — Question

The best way to recover sugar form an aqueous sugar solution is:

The particle not present in an ordinary hydrogen atom is:

Isotopes of an element have:

The atomicities of ozone, sulphur, phosphorus and argon are respectively:

“Is malleable and ductile” best describes:

1. A solution.
2. A metal.
3. A compound.
4. A non-metal.

A solution of copper oxide was prepared by heating, igniting and precipitation. Which of the following method will give higher ratio of copper oxide:

3.42g of sucrose are dissolved in 18g of water in a beaker. The numbers of oxygen atoms in the solution are:

The law of constant proportions was given by:

Which one of the following is not a metalloid?

Which one of the following statements related to the process of evaporation is incorrect?