Question # 1

The wire in the flash bulbs is made up of

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Mg

Ba

Cu

Ag

Portland cement is manufactured by using

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Limestone,clay and sand

Limestone,gypsum and sand

Limestone,gypsum and alumina

Limestone,clay and gypsum

Which of the following halogens does not forms its oxyacids?

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Fluorine

Chlorine

Bromine

Iodine

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

An endothermic reaction is one in which

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Heat is converted into electricity

Heat is obsorbed

Heat is evolved

Heat is converted into mechanical work

In a reversible chemical reaction having two reactants in equilibrium if the concentration of the reactants are doubled then the equilibrium constant will

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Also be doubled

Be halved

Becomes one fourth

Remains the same

At 500 K the equilibrium constant for reaction cis-C₂H₂CI₂ trans-C₂H₂CI₂ is 0.6. At the same temperature the equilibrium constant for the reaction trans-C₂H₂CI₂ cis-C₂H₂CI₂ will be

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0.60

1.67

0.66

2.6

The weight of 11.2 liters of CO₂ at S.T.P. would be

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88 g

44 g

32 g

22 g

For the reaction

2A(g) + B(g) 3C(g) + D(g)

two moles each of A and B were taken into a flask The following must always be true when the system attained equilibrium

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[A] = [B]

[A] < [B]

[B] = [C]

[A] > [B]

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