Question # 1

____________ Is drawn in wires.

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Gold

Silver

Helium

Nil

The isotopes of an element have different number of

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Electrons

Protons

Neutrons

Protons & Neutrons

The simplest of these has formula:

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C60

C10

V20

C30

Nelson's cells used to prepare caustic soda along with gases. Which of the following gas is produced at cathode?

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CI₂

H₂

O₃

O₂

Es is symbol of :

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Erbium

Einsteinium

Europium

Fremium

Hydrogen is a ____________

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Metal

Non metal

Metalloids

Nil

D-block consists of:

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4th,5th & 6th periods

2nd, 3rd & 4th periods

1st, 2nd, & 3rd periods

________________ proposed that matter is composed of small particles.

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Greek

English's

Russian

Nil

Which of the following result in discovery of proton?

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cathode rays

canal rays

x-rays

alpha rays

Which one of the following will show negligible effect of temperature on its solubility?

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KCI

KNO³

NaNO³

NaCI

................. can be decomposed into simpler substanmce.

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Compound

Element

Solution

Mixture

Non-metals do not reaction with

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Strong bases

Concentrated acids

Dilute acids

Salts

Oxygen is ___________

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Metals

Non-metals

Gas

b & c

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