Is matter around us pure

The amount of solute present per unit volume or per unit mass of the solution/solvent is known as

• (a) Composition of solute

• (b) Concentration of a solvent

• (c) Concentration of a solute

• (d) Concentration of a solution

Two chemical species X and Y combine together to form a product P which contains both X and Y
X + Y   $\rightarrow$    P
X and Y cannot be broken down into simpler substances by simple chemical
reactions. Which of the following concerning the species X, Y and P are correct?
(i) P is a compound
(ii) X and Y are compound
(iii) X and Y are elements
(iv) P has a fixed composition

• (a) (i), (ii) and (iii),

• (b) (i), (ii) and (iv)

• (c) (ii), (iii) and (iv)

• (d) (i), (iii) and (iv)

The quantity of matter present in an object is called

• weight

• Gram

• mass

• density

What is the solute in the soda water?

• Water

• Carbon dioxide

• Sugar

• Oxygen

how will you seperate oxygen from a mixture of liquid air?

• centrifugation

• seperating funnel

• fractional distillation

• distillation

a mixture of dye in a volatile liquid can be seperated by?

• evaporatoion

• sedimentation

• chromatography

• filtration

Tyndall effect is observed in forests because of

• tress

• high oxygen level

• mist and dust particles in the air

• less sunlight

concentration of 36g of NaCl in 100 g of water is

• 23%

• 26.47%

• 29.32%

• 21.11%

. This is a type of heterogeneous mixture in which the particles are dispersed and do not settle out.

• alloy

• solution

• suspension

• colloid

Particles size of solution

• Less than 1 nm

• More than 1 nm

• Between 1 and 1000 nm

• More than 1000 nm