Question # 1

The freezing point of 1 molal NaCI solution assuming NaCI to be 100% dissociated in water in

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-1.86°C

-3.72°C

+1.86°C

+3.72°C

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]

Detergents are

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Synthetic products

Natural products

Both A and B

None of the above

In which of the following elements +1 oxidation state is more stable than +3

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B

AI

Ga

Ti

Hydrolytic conversion of sucrose into glucose and fructose is known as

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Induction

Inversion

Insertion

Inhibition

Among the alkaline earth metals the element forming predominantly covalent compounds is

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Be

Mg

Sr

Calcium

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 last orbit of argon would have electrons

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8

18

2

6

Vitamin A is present in

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Liver

Milk

Green vegetables

All

The heats evolved in combustion of rhombic and monoclinic sulphur are - 70960 and -71030 cal mol^-1 respectively what will be heat of conversion of rhombic sulphur ti monoclinic?

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70960 calories

71030 calories

-70 calories

+70 calories

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

The vapour density of a gas is 11.2. The volume occupied by 11.2 g of this gas at N.T.P. is

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22.4 litres

11.2 litres

1 litre

2.24 litres

Dilute hydrochloric acid solution cannot be concentrated by boiling beyond

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11%

33%

44%

22%

Hypo is used to photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

Which of the following mineral does not contain Al?

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Cryolite

Mica

Feldspar

Fluorspar

What happens when CCl₄is treated with AgNO₃solution?

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NO₂will be evolved

A white ppt. of AgCl will form

CCl₄will dissolve in AgNO₃solution

Nothing will happen

Which of the following cannot be produced by acidic dehydration of alcohols?

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Ethers

Aldehyde

Alkyl Hydrogen sulphate

Alkene

The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water in

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-1.86°C

-3.72°C

+1.86°C

+3.72°C

Which of the following nitrogen fertilizer contain more nitrogen

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NaNO₃

KNO₃

NH₄NO₃

Urea

Which is the most amphoteric?

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Na₂O

MgO

Al₂O₃

CaO

Which of the following has greatest tendency to lose electron?

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F

Fr

S

Be

Which quantum number is sufficient to describe the electron is hydrogen

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ι

n

m

s

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