TEST - 30 ( Chemical Bonding )

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EFFORTS NEVER FAIL

NAME : *

1.Ionic bond is formed between atoms of elements with electro negitivity difference equal to or greater than *

1 point

0.1

1.0

1.9

9.1

2.Except all the Noble gases have eight electrons in their outer most shell. *

1 point

Helium

Argon

Neon

Radon

3.The number of covalent bonds in Methane molecule *

1 point

4. Hybridisation of atomic orbitals was proposed by *

1 point

Linus pavling

Moseley

Mendaleeff

Cosal

5.The chemical formula of common salt is *

1 point

Na2Cl

NaCl

NaCl2

Na2Cl2

6.Which of the following elements exists as atoms but not molecules? *

1 point

Halogens

Metals

Inert gases

Alkaline earth metals

7.Which of the following are responsible for the formation of bonds between an atoms? *

1 point

Lone electrons

All electrons

Valence electrons

No electrons

8.Which of the following ions lose electrons to form stable positive ions? *

1 point

Anions

Cations

Both A & B

None

9.The valency of chlorine is *

1 point

10.Nitrogen forms a covalent bond. *

1 point

Single

Double

Triple

None

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