Question # 1

Which halide among the following is used as methylating agent?

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CH₃l

C₂H₅Cl

C₂H₅Br

C₆H₅Cl

The coinage metals are

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Ni, Pd, Pt

Cu, Ag, Au

Zn, Al, Pb

Fe, Si, Sn

The organic compounds containing Ph-OH group are called:

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Phenol

aldehyde

Keton

Carboxylic acids

Ethanol is prepared in Pakistan form fermentation of:

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Starch

Sugar

Glucose

Molasses

Which of the sub-atomic particles is not charged

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Electron

Proton

Neutron

All of them

2SO₂ + O₂ ⇌ 2SO₂H= 188KJ mole^-1

Which statement about following equilibrium is correct :

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The value ofK_pfalls with arise in temperature.

The value ofK_pis equal tok_c.

The value ofK_pfalls with the increase pressure.

Adding V₂O₅ catalyst increase the equilibrium yield of Sulphur trioxide.

Which of the element is not an alkaline earth metal

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Beryllium

Strontium

Barium

Caesium

Ethyl acetate reacts with CH₃MgBr to form

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Secondary alcohol

Tertiary alcohol

Primary alcohol and acid

Acid

E = hv is the

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Spectral equation

Plank's equation

de Broglie's equation

None of these

Sodium thisoulophate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behaviour

The specific conductance of a 0.1 N KCl solution at 23°C is 0.012 ohm^-1cm^-1. The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be

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0.142 cm^-1

0.66 cm^-1

0.916 cm^-1

1.12 cm^-1

The human body can synthesize ______ amino acids

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1

10

20

19

Cu²⁺with d⁹electronic configuration appears

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Yellow

Pink

Blue

Green

When methane reacts with Cl₂in the presence of diffused light the products obtained are?

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Chloroform only

Carbon tetrachloride only

Chloromethane and dichloromethane

Mixture of a,b,c

A solution consisting of 92 grams ethyl alcohol (C₂H₅OH) 96 grams methyl alcohol (CH₃OH) 90 grams water the mole fraction and mole percent of methyl alcohol is

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0.3. 30%

0.2, 30%

0.5, 30%

0.2, 20%

Bronze is an alloy which contains

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60% cu

70% cu

80% cu

99% cu

The mass of sulphur which combines with 24 grams oxygen to form SO₂

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32 gram

24 gram

8 gram

12 gram

Which of the following gives iodoform on heating with a solution of I₂containing Na₂CO₃?

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Ethyl alcohol

Acetone

Ethyl alcohol as well as acetone

Methyl alcohol

Which of the following is not a synthetic polymer?

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Polyethylene

PVC

Nylon

Cellophane

Which of the following statements is not true?

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Isotopes with even atomic masses are comparatively abundant

Isotopes with even atomic masses and even atomic numbers are comparatively abundant

Isotopes with even atomic masses and odd atomic number are comparatively abundant

Shape of CIO₃is

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Triangular pyramidal

Tetrahedral

Triangular planar

Triangular bipyramidal

A cell constant is generally found by measuring the conductivity of aqueous solution of

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BaCl₂

KCl

NaCl

MgCl₂

Aromatic aldehydes undergo disproportionation in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as

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Wurtz reaction

Cannizzaro reaction

Friedel Craft reaction

Claisen reaction

Which of the following compound is no formed according to octet rule:

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KrF₂

XeF₂

XeO₃

SF₆

Which of the following expressions show a heterolytic bond fission

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Mark the correct statement

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Na⁺is smaller than Na atom

Na⁺is larger than Na atom

Cl^-is the smaller than Cl atom

Cl^-(ion) and Cl (atom) are equal in size

During reaction of O₂and alkenes, a product:

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Glycol

Epxide

Halohydrin

Ethylene glycol

Which of the following compounds could be prepared by reacting bromoethane with KCN and then reducing the product

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CH₃CH₃

CH₃CH₂NH₂

CH₃CH₂CH₂NH₂

CH₃CH₂CH₃

The molarity of solution containing 14.5 grams urea (N₂H₄CO) dissolved in 100 cm³of the solution is

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1 molar

0.1 molar

0.2 molar

0.25 molar

Which statement about the following equilibrium in correct?

2SO_{2 (g)}+ O_2(g)---------------2sO_3(g)H= - 188.3 KJ mol-1

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T value of K_{p falls witha rise in temperate.}

The value of K_{p falls withincreasing pressure}

Adding V_2O₅catalyst increase the equilibrium yield of sulfur trioxide

The value of K_{p is equal to}K_p

The branch of chemistry which deals with thermal energy changes in chemical reactions is called

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Chemical kinetic

Thermodynamics

Thermochemistry

Mechanics

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