Question # 1

-------------acts are reserve energy sources.

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Enzymes

Vitamins

Proteins

Lipids

Caustic chemical drain cleaner are captable of dissolving.

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Hair

Food

Grease

All of these

1- gram atom of carbon contain hwo many moles.

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1 mole

2 mole

6 moles

12 moles

Which of the following is insoluble salt

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KCl

AgCl

NaCl

CaCl2

When the rate of the forward reaction takes place at the rate of reverse reaction the composition of the reaction mixgure remains consant. It is called.

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Chemical Equilibrium

Static equilirbirum

Both a and b

None of the above

A reaction between an acid and a base produces

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Salt and an acid

Sald and base

Salt and water

Salt and gas

Which is used to manufacture soap?

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NH4OH

Ca(OH)2

NaOH

Mg(OH)2

Whcih of the following is not true about the formationof Na₂S

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Each sodium atom loses one electron

Sodium forms cation

Each sulphur atom gains one electron

Sulphur form anion

How many periods are present in the modern periodic table

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7

8

10

12

All transition elements belong to

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s and p block

d- block

f-block

d and f block

What does keep the particles present in the nucleus intact.

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Particles are held together by dipolar force

Particles are held together by wee nuclear force

Particles are held together by strong nuclear force

Particles are held together by electrostatic force

Which one of the following properties of water is responsible for rising of water in plants?

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Specific heat capacity

Viscosity

Excellent solvent action

Capillary action

Which of the following gas is used in warfare?

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Methane

Ethane gas

Mustard gas

None of these

Who put forward '' the vital force theory''?

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Kolbe

Wohler

Berzellius

Jabir - Bin - Hayan

Which of following is not conjugate base.

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S^-2

F^-1

Na⁺

SO₄

The removal of Mg⁺² and Ca⁺² Ion which are responsible for the hardness of water is called.

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Temporary hardness

Permanent hardness

Water softening

Hydrogen bonding

Freezing point of water is:

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-4°C

0°C

-36°C

-58°C

Chemical formula of chloroform is :

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CH₂Cl₂

CH₃Cl

CHCl₃

CCl₄

The meaning of latin word acidus is.

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Sweet

Tasteless

Salty

Sour

Which of the following in insoluble in water.

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Benzene

NaCl

KCl

All of them

Which gas is produce by the electrical lightening of air.

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NO

SO₂

SO₃

CO₂

Eggs oils and fats contain vitamin .

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A

B

C

D

Safe and reliable method of drying crystals is through.

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Pressing it between folds of filter paper

Drying it in oven

Evaporation of solution

Vacuum desiccator

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1

2

3

None of these

In which , case particles are separated from each other.

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Fusion

Condensation

Neutralizations

Vaporization

Which is not example of natural plasma.

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Lightening bolt

Aurora

Neon sign

Sum

The long chains of amino acids are coiled about one another onto a spiral by

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Ionic bond

Van der walls forces

Hydrogen bonding

Overlapping of orbitals

Le-Chatelier Braun principle is sometimes known as

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Law of mass action

Law of mobile equilibrium

Law of active mass

All of these above

The octet rule in not followed in the formation of

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NF₃

CF₄

CCI₄

PCI₅

a zero order reaction is one is which

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Reactants do not react

One reactant is in large excess

Concentration of reactant do not change with passage of time

Rate is of affected by changing concentration of reactants

______ Molecule has zero dipole moment.

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CO

H2S

SO2

CH4

When aqueous NaCl is electrolyzed, which of the following ions gas discharged at anode.

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Cl-

OH-

Na+

H+

In a period of periodic table, atomic radii

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Increases

Decreases

Remain same

First decreases than increases

Cyclic structure of benzene was proposed by

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Dewar

Faraday

Down

Kekule

The most ionic is

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HF

HCl

HBr

HI

Which is called milk of magnesia.

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MgCO3

Mg(OH)2

MgSO4

MgCl2

Which elements are deposited at the cathode during the electrolysis of brine in diaphragm cell

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H₂

Ba

Ra

Rn

Which of the following enzymes brings about the hydrolysis of fats

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Urease

Maltase

Zymase

Lipase

Which reaction is disproportionate reaction

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Aldol Condensation

Cannizzaros's reaction

Haloform reactions

Acid-catalyzed reactions

Which element form maximum compounds with Xenon

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F

Cl

Br

I

Which one of the following is an amide

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(NH₂)₂CO

NH₂.CH₃

C₆H₅NH₂

N(CH₃)₃

The macronutrients are required in quantities ranging from

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4-40 kg per acre

10-100 kg per acre

5-100 kg per acre

5-200 kg per acre

Aluminium oxide is

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Acidic oxide

Baric oxide

Amphoteric oxide

None of these

The percentage of nitrogen in urea is.

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36%

46%

56%

65%