Tag: group 16 elements

Quizzes (1) Questions (61)

Questions Related to group 16 elements

Multiple choice chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

Which one of the following elements is not detected by Lassaigne's test?

  1. Sulphur

  2. Nitrogen

  3. Oxygen

  4. Chlorine
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

It is a general test for the detection of halogens, nitrogen and sulphur in an organic compound. These elements are covalently bonded to the organic compounds. In order to detect them, these have to be converted into their ionic forms. This is done by fusing the organic compound with sodium metal. 

Multiple choice chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

State True or False.
Before 1961, the atomic weight standard for elements was based on oxygen and not carbon.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

True.

Before 1961, oxygen was used as the reference standard, with an assigned value of 16. The unit of atomic mass was thereby defined as $ 1/16$ the mass of an oxygen atom.

Multiple choice chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

The most abundant non-metal in the earth's crust is:

  1. chlorine

  2. hydrogen

  3. silicon

  4. oxygen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Aluminium is the first most abundant metal while iron is the second most abundant metal on earth. It is the fourth most common element in the earth's crust. Oxygen is the most abundant non metal and second is silicon present on earth's crust.

Multiple choice chemistry p- block elements-ii group 16 elements - general properties group 16 elements - trends in chemical properties group 16 elements

Statement 1: By mass, oxygen is the most abundant element in the human body.
Statement 2: It is principally found as $O _2$ in the bloodstream.

  1. Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.

  2. Both Statement 1 and Statement 2 are correct, but Statement 2 is NOT the correct explanation of Statement 1.

  3. Statement 1 is correct, but Statement 2 is not correct.

  4. Statement 1 is not correct, but Statement 2 is correct.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

By mass, oxygen is the most abundant element in the human body.

Oxygen is found in the human body as oxy-haemoglobin in the bloodstream but not as $O _2$

So statement 1 is correct but not 2.
Hence option C is correct.