Question # 1

The element having less value of ionizatin energy and less value of electron affinity is likely to belong to.

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Group1

Group 13

Group 16

Group 17

Whcih term is the same for one mole of oxgen and one mole of water.

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atoms

mass

Molecules

Volume

Which of the following is a metal

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Magnesium

Carbon

Hydrogen

Nitrogen

In which period and group yu will place the elemnt whic is an important part of the solar cell?

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Third period and Sixth a grop Group 16

Third priod and forth A group Group 14

Second period and forth A group Group

Third prod and fifth A group Group 15

Which Isotopes is commonly used to irradiate cancer cells.

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Cobalt -60

Iodine-23

Carbon -14

Iodine-131

An element has 5 electrons in M shell. Its tomic number is.

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5

10

15

20

How many elements are present in 1st period.

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1

2

8

18

Molecular mass of Acetic Acid

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70 amu

43 amu

60 amu

80 amu

Which is the correct formula of calcium phosphide.

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CaP

Ca₃P₂

CaP₂

Ca₂P₃

Diamond is...................

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conductor

non -conductor

both a and b

None of these

In diamond, each C-atom is covaently bonded wiht.......C-atom

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Two

Three

Four

Five

Formula of palmitic acid is.

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C₁₅H₃₁COOH

C₁₂H₃₅COOH

C₁₅H₃₀COOH

C₁₇H₃₄COOH

What one of the following does not contain protein?

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Pulses

Potatoes

Beans

Eggs

Which one of the following ion does not cause hardness in water?

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Ca⁺²

Mg^-2

SO^-2

Na⁺

Swimming pools are cleaned by the process.

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Chlorination

Hydrogenations

Saponification

None of them

Which one of the following gases is used to destroy harmful bacteria in water.

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Iodine

Chlorine

Fluorine

Bromine

Molecular formula of butyne is .

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C₄H₆

C₃H₄

C₄H₇

C₄H₈

Gypsum in water is.

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Sparingly soluble

Insoluble

Highly soluble

None of them

About 99% of atmospheric mass lies in.

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35 km

30 km

15 km

16 km

Percentage of carbon in peat is.

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50%

60%

70%

80%

Margarine is produced by adding hydrogen to vegetable oil at.

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2000 ^oC

100^oC

200^oC

1000^oC

The envelope of different gases around the earth is called.

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Atmosphere

Brosphere

Lithosphere

Hydrosphere

Rutherford's model fo atom failed because

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The atom did not have a nucleus and electrons.

It did not account for the attraction between protons and neutrons.

It did not account for the stability of the atom

Their is actually no space between the nucleus and the electrons.

One of the following statements about Born-Haber cycle is correct. Which is that statement

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Born-Haber cycle is different from Hess's law

The energy change in a cyclic process is not zero

The lattice energy of the crystalline substances can be calculated easily

Heat of formation of the product and the lattice energy of the substance can be calculated simultaneously

Which of the following elements in its crystalline form will have the lowest enthalpy change of vaporization

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Chlorine

Argon

Phosphorus

Silicon

The cathodic reaction in the electrolysis of dill. H₂SO₄with Pt electrodes is

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Reduction

Oxidation

Both oxidation and reduction

Neither oxidation nor reduction

The concept of distribution of velocities among the gas molecules was given by.

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Clausius

Mexwell

Boltzmann

Vander waal

The unit of rate constant is the same as that of the rate of reaction is.

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First order reaction

Second order reaction

Zero order reaction

Third order reaction

The substance which decrease the activity of a catalyst is called.

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Promoter

Activator

Inhibitor

Positive catalyst

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

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In the nucleus

In the second shell

Nearest to the nucleus

Farthest from the nucleus

In Al2O3, the ratio between the ions is

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1 :2

2:1

2:3

3:2

Photosynthesis a photochemical reaction has order of reaction

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0

1

2

Fractional order

Which statement is incorrect about 64 g of SO2.

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It is one mole SO2

The number of SO2 molecule are 6.02 x 10²³

The number of oxygen atoms are 6.02 x 10²³

The number sulphur atom are 6.02 x 10²³

In which substance silicon is not present.

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Talc

Asbestos

Dolomite

Zirocon

In water the concentration of dissolved O₂should be

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1-3 ppm

2-4 ppm

4-8 ppm

8-12 ppm

When ethyl alcohol is heated with conc. H2SO4 it produces ethene. The temperature required is as proximately

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100 ^oC

78 ^oC

Above 200 ^oC

140- 170 ^oC

In which group of periodic table is the element which has atomic number 14.

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II

IV

III

VI

Which of the following lipids does not have glycerol backbone.

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Fat

Oil

Cholesterol

Phospholipid

The anhydride of HCIO4 is

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CIO3

CIO2

Cl2O5

Cl2O7

In aqua regia, the ratio of conc. HCl to Conc. HNO3 is

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1 : 1

2 :1

1:2

3 : 1

A caboxylic acid contains

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a hydroxyl group

a caboxyl group

a hydroxyl and carboxyl group

a carboxyl and an aldehyde group

Banana flavour is given by the ester

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Octyl acetate

Amyl butyrate

Amyl acetate

Ethyl butyrate

When ethyl alcohol is heated, with NH3 in presence of ThO2 then

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O-H bond is broken

C-O bond is broken

Ethene is formed

Ethane is formed

Preparation of vegetable ghee involves

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Halogenation

Hydrogenation

Hydroxylation

Dehydrogenation