CIE Chemistry Paper-1: Specimen Questions 70 - 72 of 99

Passage

In the below questions. Complete the following puzzle.

Complete the puzzle above

Complete the puzzle above

Find the missing values in the questions.

Question number: 70 (1 of 6 Based on Passage) Show Passage

MCQ▾

Question

TOP TO DOWN: At position 50, a gas with many industrial applications, important for plant growth. Belongs to group VA

Choices

Choice (4) Response
a.

Oxygen

b.

Nitrogen

c.

Carbon

d.

Phosphorous

Answer

b.

Explanation

Nitrogen is important to the chemical industry. It is used to make fertilisers, nitric acid, nylon, dyes and explosives. A colourless, odourless gas. Its electronic configuration is 1s2, 2s2, 2p3

Hence period = 2+3 = 5A

Completed Puzle given in the question

Completed Puzle given in the question

Names of the gases completed asked in the question

Question number: 71 (2 of 6 Based on Passage) Show Passage

MCQ▾

Question

TOP TO DOWN: At position 51, a noble gas belonging to group 18.

Choices

Choice (4) Response
a.

Krypton

b.

Helium

c.

Argon

d.

Neon

Answer

c.

Explanation

Argon is a chemical element with symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas.

Completed Puzle given in the question

Completed Puzle given in the question

Names of the gases completed asked in the question

Question number: 72 (3 of 6 Based on Passage) Show Passage

MCQ▾

Question

ACROSS: At position 48, a versatile element found in many different chemical compounds.

Choices

Choice (4) Response
a.

carbon

b.

Hydrogen

c.

Nitrogen

d.

Oxygen

Answer

a.

Explanation

Carbon is a chemical element with symbol C and atomic number 6. On the Periodic table, it is the first of six elements in column 14, which have in common the composition of their outer electron shell. Carbon is a versatile element and is found in many different chemical compounds, including those found in space. Carbon is versatile because it can form single, double, and triple bonds. It can also form chains, branched chains, and rings when connected to other carbon atoms.

 Completed Puzle given in the question

Completed Puzle given in the question

Names of the gases completed asked in the question

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