Question # 1

positive ion hare formed by _________ of electrons.

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Gain

Loss

Sharing

Bonding

The most abundant element occurring in the oceans is:

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Oxygen

Hydrogen

Nitrogen

Silicon

____________ used to remove nail polish.

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Acetyline

Acetone

H2O

Nil

Cu + 2AgNO3 -------> Cu(NO3) +2Ag. In this reaction reducing agent is:

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Cu

AgNO3

Cu(NO3)2

Ag

The bond in covalent compound is ________________

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Covalent

Ionic

Dative

Couple

Sodium - potassium alloy is used in nuclear reactor as a:

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catalyst

coolant

reactant

absorber

H° + H° are ________________ in energy.

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Lower

Higher

Medium

Nil

At ____________ °C water converts to ice.

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101°

100°

99°C

100.2°C

How many number of electrons take part in triple covalent bond?

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2

4

6

8

Which one metal is least reactive?

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K

Fe

Cu

AI

Concentration is ratio of:

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solvent to solute

solute to solution

solvent to solution

both a and b

Which metal present in acid rain affect the aquatic life by clogging fish gills?

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Lead

Chromium

Aluminium

Mercury

Which pollutant is responsible for changing weather?

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Air pollutant

Water pollutant

Soil pollutant

All of them

Dehalogenation of tetrahalides produces acetylene. This reaction takes place in the presence of

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Sodium metal

Zinc metal

Magnesium metal

Potassium metal

Citric acid is present in

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Citrus fruits

Sour milk

Rancid butter

Apple

Salt makes the water permanently hard.

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CaSO₄

Ca(HCO₃)₂

NaHCO₃

NaCO₃

In which of the following groups , oxygen is attached on both sides with carbon atoms.

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Ketone group

Ether group

Aldehyde group

Easter group

Incomplete combustion of alkanes produces.

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Carbon dioxide only

Carbon monoxide only

Carbon monoxide and carbon black

Carbon dioxide and carbon black

Hydrogenation of vegetable oil to convert it into banaspatic ghee is carried out in the presence of catalyst:

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Ni-metal

Zn-metal

Na - Metal

Fe2O3

Which of the following is fat soluble vitamin?

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Vitamin A

Vitamin E

Vitamin K

All of these

soap is the sodium salt of long chain.

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Amino acids

Fatty acids

Nucleotides

None of them

Oxidation of alkenes forms:

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Glycol

Glyoxal

Formic acid

Oxalic acid

According to Boyle's law which parameters give a straight line parallel to x -axis when we plot a graph between

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P and V

P and 1/V

P and PV

V and T

In the ground state of an atom the electron is present.

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In the nuclsus

In the second shell

Nearest to the nucleus

Farthest from the nucleus

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Which of the following contains the same number of molecules as 9 g of water.

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2 g of hydrogen gas

14 g of nitrogen gas

32 g of oxygen gas

44 g of carbon dioxide gas

Solubility of which substance decreases by increasing temperature.

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NaNO3

KNO2

NaCl

Ce2(SO4)3

The number of molecules in one dm³of water is close to

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A glass is full of water and contains 6.02 x 10²³molecules of H2O The mass of water molecules is.

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18 gm

90 g

120 g

180 g

Ice float over water because.

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Its structure is diamond like

Its density is maximum at 4 ^oC

It is less dense than water

It has no regular arrangement of molecules.

Those elements whose electronegativities are 1.2 and 3.2, react to form

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Ionic bond

Covalent bond

Gaseous substance

Definiting a liquid substance

An aqueous solution of ethanol is water has vaporu pressure.

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Equal to the of water

Equal to that of ethanol

More than that of H2O

Less than that of water

Noon has low critical temperature and pressure as compared to other gases. the most probable reason is that

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Its octet is complete

It is a monoatomic gas

It has very low polarizability

It has least forces of attraction

What is Glacial acetic acid

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Pure acetic acid

95% acetic acid

a mixture of acetic acid and glycerol

Vinegar

Which raw material is used for manufacture eof HNO3 by Birkland eyed process

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NH3 and CO2

Air

Air and gypsum

Lime stone and urea

Which of the following species is ortho and para director.

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CHO

SO3H

NO2

Cl

Which one of the following compounds is a heterocyclic.

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Anthracene

Phenol

Pyridine

Aniline

The word alkali is derived from which language

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Arabic

Greek

French

German

Al reacts with caustic soda to form

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Sodium aluminates

Aluminium hydroxide

Aluminium oxide

sodium tetra aluminate

-SH Functional group is called

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Cyano

Mercapto

Nitro

Carboxyl

Which one of the following elements burns in air to form an oxide which, when shaken with water, give a solution with a pH greater than 7.

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Carbon

Magnesium

sulphur

Hydrogen

Which metal is used in the thermite process because of its activity.

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Iron

Copper

Aluminium

Zinc

Which of the following is an ester.

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Soap

Starch

PVC

Dacron

The flavour of amylacetate is

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Orange

Apricot

Banana

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