Question # 1

First energy level is denoted by:

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K

L

M

N

NaOH is prepared by ____________ of NaCL (aqueous).

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Electrolysis

Decomposition

A & B

Nil

Free radical is a

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Extremely stable

Extremely reactive

Extremely inert

All of these

The forces of attraction present between the molecules of a substance are called ____________ forces.

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Intermolecular forces

Covalent

Ionic

Nil

The earth is made up of ___________ % of iron.

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4

5

6

7

The symbol of sodium is :

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Sa

Na

Pa

Ca

Which one metal is least reactive?

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K

Fe

Cu

AI

All of the following are tri-atomic molecules except:

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H²

O³

H²O

CO²

PCL5 is ________________ shaped.

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Bipyromidal

Angular

Triangular

Linear

In common, a solution has ___________ components.

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1

2

3

4

____________ used to remove nail polish.

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Acetyline

Acetone

H2O

Nil

Water molecule had a structure;

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non-polar

polar

ionic

tetrahedral

Formic acid is present in

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String of bees

Sour milk

Apple

Fats

The most important disaccharide is .

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Sucrose

Glucose

Cellulose

None of them

Formula of baking soda is.

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Na₂CO₃

NaHCO₃

Na₂SO₄

Na₂PO₄

At equilibrium state there are possibilities: OR types of chemical equilibrium are.

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1

2

3

4

Which gas is responsible in warming the atmosphere?

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Nitrogen

Hydrogen

Helium

Fluorine

Word "acid" derived from:

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Urdu

English

Latin

Greek

When acid reacts with sulphites and Bi sulphates which gas is evolved?

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H2

CO₂

SO₂

NH₃

Bronsted and Lowry presented their theories of acids and bases in

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1785

1787

1923

1925

Lipids are macromolecules. They have characteristics except one of the following.

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They are high energy foods.

They are soluble in water.

They are poor conductor of heat.

They are esters of fatty acids.

Hydrogen atoms preset in pentane are.

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10

12

14

16

In chromatographic technique. Rf has unit.

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Mol dm-3

Cm

m3

No units

Chlorine atom and chloride Cl- ions

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Have same chemical and physical properties

Are allotropes of chlorine

Have same number of electrons

Have same number of proton

Splitting of spectral lines when atoms are subjected to strong electric field is called.

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Zeeman effect

Stark effect

Photoelectric effect

Compton effect

K_aand K_bof a conjugate acid and are related with k_was

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K_a+ K_b=K_w

K_a-K_b=K_w

K_a.K_b= K_w

K_a/ K_b= K_w

the rate of reaction when concentration of reactants are taken unity is called.

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Average rate

Instantaneous rate

Specific rate

Rate equation

NaCI and sand can be separated by one of the following without filtration

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Formation of solution and filtration

Formation of solution and evaporation without filtration

Sublimation

Chromatiograghy

Crystal to diamond is.

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Ionic

Molecular

Covalent

Metallic

Which of the hydrogen halide has the highest percentage of ionic character.

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HCl

HBr

HF

HI

Stoichiometric calculations cannot applied to reversible reactions because.

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Product again changes to reactant

Less product is formed

Reaction goes only in one direction

Products do not disappear.

A substance which rerareds the rate of a reaction is called

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Inhibitor

Activator

Auto-catalyst

None of these

Which one of the following salts do not hydrolyses

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CuSO4

Na2CO3

NaCl

AlCl3

Geometrical shape of [CO(NH3)6Cl3

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linear

square planar

Octahedral

Trigonal hypyramid

Ammonium nitrate fertilizers is not used for which crop

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Cotton

Wheat

Sugar cane

Paddy rice

In IUPAC system, the name of K4[Fe(CN)6] is

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Potassium ferricynaide

Potassium ferrocynide

Potassium Hexacyanoferrate (II)

Poatssium hexacaynoferrate (III)

Which of the following compounds will not give iodoform test on treatment with I2/NaOH

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Acetaldehyde

Acetone

Butanone

3-Pentaneone

Phenol on heating with concentrated nitric acid forms

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o-nitrophenol

T.N.T

Na2CO3

Cyclohexanol

The word paper is derived from the name of which reed plant.

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Rose

Sun flower

Papyrus

Water Hyacinth

The structure of Benzene is

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Hexagonal irregular

Tetrahedral

Trigonal planner

Hexagonal planner

Which woody raw material is used for the manufacture of paper pulp.

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Cotton

Bagasse

Poplar

Rice straw

What product are formed by the oxidative cleavage of 2-butene by alkaline KMnO4.

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Propionic acid and formic acid

Ethanoic acid only

Ethanal only

Water and ethanol

Down's cell is used to prepare.

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Sodium carbonate

Sodium bicarbonate

sodium metal

Sodium hydroxide

The general formula for Alkanes is

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C_nH_2n+1

C_nH_2n

C_nH_2n-2

C_nH_2n+2