High School Chemistry Questions and Answers - 1

Question: 1

The percentage of carbon in cast iron is

(A) 0.1 - 1.5%

(B) 0.25 - 2%

(C) 1.3 - 4%

(D) 2 to 5%

Question: 2

The mixture of 25% ethanol and 75% petrol is known as

(A) Absolute alcohol

(B) Power alcohol

(C) Methylated spirit

(D) Rectified spirit

Question: 3

A radioactive substance emits

(A) Alpha particle

(B) Beta particle

(C) Gamma particle

(D) All of the three

Question: 4

_____ alloys is used for making magnets.

(A) Stainless steel

(B) Magnalium

(C) Duralumin

(D) Alnico

Question: 5

A mixture of ethyl alcohol and water can be separated by

(A) Fractional distillation

(B) Using a separating funnel

(C) Sublimation

(D) Evaporation