Question # 1

Washing clothes at 140 ^oF uses almost the energy as at 140 ^oF wash

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Half

Thrice

Twice

None of the above

Mass Number is repreented by

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Z

S

A

M

Whcih of the following atoms obey duplet rule.

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O₂

Cl₂

H₂

Li₂

Which is the correct formula of calcium phosphide.

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CaP

Ca₃P₂

CaP₂

Ca₂P₃

A substance formed when two or more different elements combine chemically.

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Compund

Solution

Element

Atom

The unit of ionization energy is

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nm and pm

kJ mol-1

Pascal

Newton

Malleability is the property by virtue of which a metal can be drawn into.

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Rods

Plates

Sheets

Wires

The enthalpy of reaction 2H2 +O2-----2H2O

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-571.6 kJ

-110.5 kJ

-393.5 kJ

+53.8 kJ

--------------- acts a catalyst promoting the breakdown of ozone.

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I2

Br2

Cl2

None

Emperical Formula of Glucose is

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CH2O

CHO

CHO2

C2HO

When new bonds ae formed, the energy is

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Consume

Remain same

Release

None of these

Whcih is true about the equilibrium state?

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The forard reaction stops

Both forward and reverse reactions stop

Both foward and reverse reactions continue at the same rate

The reverse reaction stops

When we move form left to right in a period, atomic number

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Decreases

Increases

First increases then decreases

None of the above

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