Question # 1

When U-235 breaks up, it produces?

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electrons

neutrons

protons

nothing

________________ is the shortest period.

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6th

8th

2nd

1st

Which one of the following is a galvanic cell?

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Daniel cell

Nelson's cell

Down's cell

Both B and C

Which one of the following is not an electrolytic cell:

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Down cell

Galvanic cell

Nelson' cell

Both a and c

Number of protons+ neutrons is :

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Atomic mass

Mass numbers

Both

Nil

Ionic compound are ________________ in water.

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insoluble

Soluble

Covalent

Solvent

............... periodic table consist of group & periods.

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Bohr

Rutherford

Mendeleev's

Nil

Which one is the following belongs no Noble Gases?

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O

F

Ne

Nil

Which is an acceptor molecule/ion?

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N₂

O₂

H⁺

CH₄

The absolute zero means:

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273.15 °C

-273.15 °C

0 °C

-373.15 °C

Which one is largest?

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Exo

Peta

Atto

Pico

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

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CH⁴

KBr

CO²

H₂O

In ________________ Rutherford's was studying radiations.

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1911

1931

1921

1922

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