True-False [Che-1M]

Question 11 Mark

The electric wires made up of copper and aluminium. [True/ False]

Answer

True.
Explanation:
Such as, copper, aluminum, etc. These metals are used to make wires. Most wires are made out of copper because it conducts electricity with high flexibility and very little resistance.

View full question & answer→

Question 21 Mark

State whether the following statement is true or false:
The aqueous solution of an ionic compound conducts electricity because there are plenty of free electrons in the solution.

Answer

False (It should be ‘ions’ in place of ‘electrons’).

View full question & answer→

Question 31 Mark

State whether the following statement is true or false :
Non-metals react with dilute acids to produce a gas which burns with a ‘pop’ sound.

Answer

False.

View full question & answer→

Question 41 Mark

Non-metals can exist in all three physical states, i.e. solid, liquid and gases. [True/ False]

Answer

True.
Explanation:
Three states of matter exist-solid, liquid, and gas.

View full question & answer→

Question 51 Mark

All the non-metals which are above hydrogen in the activity series, displaces hydrogen from dilute acids. [True/ False]

Answer

True.
Explanation:
The series of metals arranged in the decreasing order of their reactivity is called the activity or reactivity series. The most reactive metal is placed at the top, and the least reactive one is placed at the bottom of the series. Metals above hydrogen may displace.

View full question & answer→

Question 61 Mark

All ores contain minerals. [True/ False]

Answer

True.
Explanation:
Minerals and Ores: Natural materials. The Earth is the main source of minerals and ores.

View full question & answer→

Science True-False [Che-1M]

Test yourself on this topic