Metals and Non- metals

Sodium is a _______

• Insulator

• Semi- conductor

• Conductor

• None of these

A substance that can be broken down into simpler substances by chemical or physical means

• Elements

• Compounds

• Atom

• Matter

At room temperature _____ is brittle, but it becomes somewhat malleable at 100 degree Celsius.

• Sodium

• Gold

• Aluminum

• Zinc

X reacts with cold water to form its respective hydroxide and hydrogen gas. It burns with a golden flame. Identify X

• Pottasium

• Sodium

• Calcium

• Magnesium

Oxides of some metals like Aluminum, Zinc, Lead and Tin reacts with both acids and bases. Such oxides are called ________

• a) Neutral oxides

• b) Amphoteric oxides

• Both (a) and (b)

• None of these

There are around ___ elements out of which __ are naturally occurring

• 118, 92

• 118, 82

• 108, 82

• 108, 92

_____ and ____ are 2 non- metals which show luster

• Graphite, Iron

• Iron, Iodine

• Graphite ,Iodine

• None of these

Assertion: Sodium and Potassium are soft, can be cut with a knife.

Reason: Sodium and Potassium are Non-Metals

• a) Both Assertion and Reason is correct and Reason is the correct explanation of Assertion.

• b) Both Assertion and Reason is correct but Reason isn't the correct explanation of Assertion.

• c) Assertion is correct but Reason is wrong

• d) Assertion is wrong and Reason is correct

Assertion: A non-metal Sulphur is placed in the metal reactivity Series

Reason: A non metal in the Reactivity Series help in comparing the reactivity of the metals

• a) Both Assertion and Reason is correct and Reason is the correct explanation of Assertion.

• b) Both Assertion and Reason is correct but Reason isn't the correct explanation of Assertion.

• Assertion is correct but Reason is wrong

• Assertion is wrong and Reason is correct.

Assertion: Aluminium is ideal for aircraft manufacture.

Reason: It is light weight and strong, making it more fuel efficient.

• Both Assertion and Reason is correct and Reason is the correct explanation of Assertion.

• Both Assertion and Reason is correct but Reason isn't the correct explanation of Assertion.

• Assertion is correct but Reason is wrong.

• Assertion is wrong and Reason is correct.