Question # 1

The number of unpaired electrons in the p-subshell of oxygen atom

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1

2

3

4

Dolomite has the composition

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KCL.MgCL₂.6H₂O

Na₃AIF₆

CaCO₃.MgCO₃

CaCL₂.MgCl_2.6H₂O

The formula to calcium cyanamide is

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Ca(CN)₂

CaC_2N

CaNCN

CaCHNH₂

Which of the following is monoatomic?

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Oxygen

Neon

Fluorine

Nitrogen.

Maximum number of active hydrogens

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Acetic acid

Glycerol

Methane

Methanol

If a salt bridge is removed electrode is made from which of the following?

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ZnCl₂

CuSO₄

Hg₂Cl₂

HgCl₂

The osmotic pressure of solution increases if

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Temperature is decreased

Solution constant is increased

Number of solute molecules are increased

Volume is increased

The reagent which forms crystalline osazone derivation when treated with glucose is

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Fehling solution

Phenyl hydrazine

Benedict solution

Hydroxyl amine

Which of the following has least mass?

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2 gram atom of nitrogen

3 x 10²³atoms of C

1 mole of S

7.0 g of Ag.

How many moles of Helium gas occupy 22.4 L at 0°C at a atm. Pressure?

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0.11

0.90

1.0

1.11

The spectrum of helium is expected to be similar to that of

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H

Li⁺

Na

He⁺

Dehydration of glycerol give

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Propane

Propene

Acrolein

Benzene

In a crystal a≠b≠c, a =γ= 90° andβ≠90°. It is

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Monoclinic

Rhombic

Trigonal

Tetragonal

If one litre of air is passed repeatedly over heated copper and magnesium till no further reduction in volume takes place, the volume finally obtained would be approximately

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800mL

200mL

10mL

Zero

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

Natural fertilizer provides potassium in the form of K₂O (potash)

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1.5 kg

3 kg

4.5 kg

6.5 kg

When quantity of electricity passed is one faraday then the mass deposited at the electrode is equal to

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One gm. atomic weight

One gm. equivalent weight

Electrochemical equivalent

None of the above

Hydrolytic conversion of sucrose into glucose and fructose is known as

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Induction

Inversion

Insertion

Inhibition

The last orbit of argon would have electrons

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8

18

2

6

Causticisation process is used for the preparation of

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Caustic soda

Caustic potash

Baryata solution

Slaked lime

Atmosphere of big/metropolitan cities is polluted most by

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Automobile exhausts

Pesticide residue

Household waste

Radio-active fall out

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