Question # 1

Amino acid which has cyclic structural is

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Proline

Valine

Alanine

Glutamic acid

Phenol is colourless, crystalline and solid

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Hygroscopie

Deliquescent

Moistening

Odourless

Increased awareness of environment issues has led chemist to develop products and processes that do not impact on the environment in terms of pollution or depletion of sources. To help chemist to achieve this aim, some principles are drawn, which one is not the guiding principle

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avoid waste production

use no solvent

use a catalyst

devise a multistep procedure for synthesis of new compounds

Which one the following is not postulated in the kinetic molecular theory of gases

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molecules of all the gases have same size and same mass

molecules are in chaotic motion

all molecular collisions are elastic

the volume of the molecules is negligible

Phenol can be diatingushed from ethyl alcohol by all of the following reagents except

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lodoforrn test

Na

Br2 /H2O

NaOH

NaOH+HCI- NaCI+ H2O. Enthalpy change in the above reaction is called

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Enthalpy of reaction

Enthalpy of Neutralisation

Enthalpy of formation

Enthalpy of combustion

The value of the vapour pressure of water at its boiling point at Karachi and Murree is

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same

different

depends upon the environmental conditions in both cities

greater at Murree and less at Karachi

How many allotropic forms are present in carbon?

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Two

Four

Three

Five

How many isotopes are present in palladium

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Two

Four

Six

nine

Dipole-dipole interaction are present in the

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atoms of the He gas

molecules of CCl4

molecules of solid iodine

molecules of :NH3

Which of the following is a limitation of balanced chemical equation

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Conditions and rate of reactions

Physical state and mechanism

Reactants and products and their coefficients

Both (a) and (b)

Which of the following waste material is not recycled for use again

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Paper

Plastic

Hides of animals

Glass

General formula of aliphatic carboxylic acids:

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R---OH

R----COH

R----CO---R

RCOOH

When an electron is added to a uni positive ion we get:

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Cation

Molecule

Neutral atom

Anion

Splitting of spectral lines of the hydrogen atom under the influence or magnetic field is called

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Stark effect

Zeeman effect

Compton effect

Photoelectric effect

Which of the following has more unpaired d-electrons?

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Zn⁺

Fe²⁺

Ni³⁺

Cu⁺

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High temperature and low pressure

Low temperature and low pressure

Low temperature and high pressure

High temperature and high pressure

With the increase in carbon no. the solubility of carboxylic acids

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Increases

Decreases

Remains same

None of these

In the hydrolysis of CH₃COOC₂H₅the acid produced is

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Inhibitor

Catalyst

Auto catalyst

None of above

Refrectrometric method is used when

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Reactions involving absorption of I.R. or U. V

Reactions involving change of refractive index

Reactions involving ions

Change of optical activity

Chloroflurocarbon releases a chemical harmful to ozone

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Fluorine

Chlorine

Nitrogen peroxide

Sulphure dioxdie

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-110.7 KJ/mole

+110.7 KH mole^-1

676.7 KJ mole^-1

+393.7 KH mole^-1

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