CHEMISTRY ONLINE TEST 13

1 / 10

Tin forms alloys like bronze and solder because —

It has high atomic mass

It is soft and malleable

It forms Sn⁴⁺ ions easily

It is highly reactive

2 / 10

Which compound is known as “dry ice”?

Carbon black

Dry CH₄

CO (solid)

CO₂ (solid)

3 / 10

The heaviest stable isotope of carbon is —

C-13

C-12

C-11

C-14

4 / 10

Which allotrope of carbon conducts electricity?

Charcoal

Diamond

Graphite

Fullerene

5 / 10

Diamond is a bad conductor of electricity because —

It forms ionic bonds

It contains impurities

It has high melting point

It has no free electrons

6 / 10

Which of the following shows maximum catenation?

Si

C

Ge

Pb

7 / 10

The most stable oxidation state of lead (Pb) is —

+2

+3

0

+1

8 / 10

Which oxide of carbon is acidic?

CO

COCl₂

CO₂

C₃O₂

9 / 10

Ability to form double bondsCarbon forms a large number of compounds due to —

Ability to form double bonds

High electronegativity

Presence of d-orbitals

Catenation and tetravalency

10 / 10

Which of the following is not a Group 14 element?

C

P

Si

Ge

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CHEMISTRY ONLINE TEST 13

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