Question # 1

D-block consists of:

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4th,5th & 6th periods

2nd, 3rd & 4th periods

1st, 2nd, & 3rd periods

Which of the following compound is not directional in its bonding?

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CH⁴

KBr

CO²

H₂O

Which element has highest electronegativity?

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CI

F

Br

I

There are ____________ states of matter

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4

3

2

1

In ________________ Bohr considered hydrogen atom for his model .

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1913

1916

1917

1918

The core of the earth is ____________ than crust.

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LIghter

Heavier

Both

Nil

NaCl + H2O is ____________ solutions.

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Aqueous

Binary

H2O

Nil

The isotopes C-12 is present in abundance of:

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96.6%

97.6%

99.7%

None of these

The atomic number is represented by ____________

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A

Y

X

Z

In silver plating Anode is made of:

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Gold

Ag

Neon

Nil

Concentration is ratio of:

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solvent to solute

solute to solution

solvent to solution

both a and b

The branch of chemistry which deals with inter conversion of electrical & chemical energy is:

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Biochemistry

Electrochemistry

Organic chemistry

None of these

105 elements were discovered by the year ________________

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1984

1974

1086

1996

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