Question # 1

All metals are solid except

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AI

Mg

Na

Hg

Which one is least oxidizing agent?

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F

CI

I

Br

It is heterogeneous mixture

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Sand

Milk

Air

Brass

___________ is a pure substance that can be broken down.

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Matter

Element

Mass

Mixture

Which one metal is least reactive?

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K

Fe

Cu

AI

The shape of H2O is ________________

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Angular

Linear

Triangular

All of above

It is a good reducing agent

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Fe

H

C

O

"×" & "." Represent:

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Shells

Neutrons

Electrons

Atoms

The right most position in the periodic table is occupied by:

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Alkall metals

Alkaline earth metals

Translation metals

Noble gasses

Dissolution in water is due to ____________ bonding.

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Ionic

Covalent

Hydrogen

Nil

The types of solutions on the basis of their physical states are

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3

6

9

12

The colour of litmus in a strong basic solution become.

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Yellow

Blue

Red

Colourless

The reaction goes from left to right , if:

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Qc = Kc

Qc > kc

Qc<Kc

Qc = 0

Which is used to manufacture of soap?

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NaOH

Ca(OH)₂

KOH

Mg(OH)₂

Which one of the following is not a fraction of petroleum?

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Kerosene oil

Diesel oil

Alcohol

Petrol

A saturated solution of sodium chloride is called.

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Brine

Suspension

Colloidal

None of these

If Qc > Kc the reaction will be in

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Chemical equilibrium

Static equilibrium

Reverse reaction

Forward reaction

When the numbers of moles of both sides are equal in a reaction, then the unit of K_c will be:

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No unit

mol^-2 dm⁶

mol dm³

mol^-2dm

Which gas creates suffocation and causes death?

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CO

CO₂

SO₃

SO₂

Which acid is found in Ant sting?

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Citric Acid

Formic Acid

Uric Acid

Sulphuric acid

Potassium Ferrocyanide is a:

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Normal salt

Mixed salt

Complex salt

Double salt

Neurological damage is caused by the poisoning of.

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Lead

Cadimium

Mercury

All of them

The partial pressure of oxygen in lungs is

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760 torr

320 torr

159 torr

116 torr

The nature of copper crystals is

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Metallic

Ionic

Covalent

Molecular

The S.I. units for the molar heat capacity are

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Joule Cm^-3degree^-1

Joule deg^-1atm^-1

Joule deg^-1mol^-1

Joule deg^-1kg^-1

A pressure cooker reduces cooking time because.

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Heat is uniformly distributed

Boiling point of water rises

A large flame is used

Vapour pressure of liquid reduces

In which compound oxidation state of chlorine is +5

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NaCl

HOCl

NaClO3

NaClO2

Which of the following molecules have highest bond energy

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F2

Cl2

Br2

I2

The H - H Bond energy in KJ mole -1 is.

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346

436

463

336

For the equilibrium system N2 + O2 + Heat = 2NO the equilibrium constant deceases by

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Decreasing the temperature

Adding a catalyst

Adding N2

Adding NO

Oxidation number of carbon in NaHCO₃

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+4

-6

+6

+2

If the salt bridge is not used between two half cells, then the voltage.

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Decrease rapidly

Decrease slowly

Drops to zero

Does not change

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1

2

3

None of these

Which substance is formed by the catalytic oxidation of methane at 100 ^oC, 200 atmospheric pressure and copper catalyst

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Methanol

Methanal

Methanoic acid

All of these

Which of the following are alkaline earth metals?

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Be, Mg, Ca

Li, Na, K

Fe, CO, Ni

B, Al, Ga

SO2 is not absorbed in water directly to form H2SO4 because.

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The reaction does not go to completion

The reaction is quite slow

The reaction is exothermic

SO3 is insoluble in water

The total number of translation elements is

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10

14

40

65

Which one is a disaccharide

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Glucose

Sucrose

Fructose

Cellulose

Which one is cyclic amino acid

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Glycine

Alanine

Proline

Aspartic acid

Oxidation of NO in air produces

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N₂O

N₂O₃

N₂O₄

N₂O₅

Acetamide is prepared by

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Heating ammonium acetate

Heating methyl cyanide

Heating ethyl acetate

The hydrolysis of methyl cyanide

The conversion of ethene to ethanol is an example of.

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Hydration

Dehydration

Neutralization

Esterification

An ester can be prepared by the reaction of.

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Two alcohols

Alcohol and an aldehyde

An alcohol and an organic acid

an acid and a ketone

The most metallic elements from the following is

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Arsenic

Oxygen

Antimony

Bismuth