Question

lot
a.
A student takes three test tubes A, B and C containing salt solution,
starch in water and suspension of sand in water. He pastes small strips
of coloured paper on one side of each test tube. He then observe the
coloured paper from the other side of the test tube through the liquid
one by one. The correct observation out of the following is :
coloured spot is visible through A, not visible in B, appear
dim in C.
b. coloured spot is not visible through A, B and C.
C. coloured spot is not visible through A, appear dim in B,
visible in C.
d. coloured spot is clearly sen in A, appears dim in B, not
visible in C.​

Answer 1

Answer:

I think D because of process of elimination

Explanation:

Answer 2

Answer:

Concept :

A mixture is a substance made up of two or more dissimilar chemical compounds that are not chemically linked in chemistry. A mixture is a physical combination of two or more substances that maintains their identities and can take the shape of solutions, suspensions, or colloids. Chemical elements and compounds, among others, can be mechanically blended or mixed to create mixtures without causing any chemical bonding or other chemical change, preserving the chemical characteristics and composition of each component.

Explanation:

• The physical characteristics of a combination, such as its melting point, may be different from those of the components even when there are no chemical changes to the constituents.
• Some mixes can be physically, mechanically, or thermally divided into their constituent parts.
• Azeotropes are a particular type of mixture that frequently presents significant challenges when it comes to the separation procedures needed to get its constituent physical, chemical, or even a combination of those processes.

• A is a genuine answer that is totally transparent.

• B is a transluscent colloid.

• C is a suspension that almost completely blocks light.
• The answer is Coloured spot is clearly seen in A,appears dim in B,not visible in C.

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