Question # 1

The branch of chemistry that helps to treat dseases and synthesize new medicines.

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Physical Chemistry

Environmental Chemistry

Organic chemistry

Inorganic chemistry

How many covalent bonds does C₂H₂ molecule have.

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Two

Three

Four

Five

Dative covalent bondis also known as

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Covalent bond

Ionic Bond

Metallic Bond

Coordinate covalent bond

Which is used to manufacture soap?

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NH4OH

Ca(OH)2

NaOH

Mg(OH)2

According to Arrhenius concept base is a substance which dissociates in aqueios solution to give

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Hydroxide ions

Hydrogen ions

Pair of Electrons

Proton

The atomic radii of the elemtns in periodic table.

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Increase from left to right in a period

Do not chage from left to right in a period

Increase from top to bottom in a group

Decrease from top to bottom in a group

Elements of Group1 are called.

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Alkali Metlas

Alkali earth metals

Transition metals

Halogen

Which one is not an Arrhenious acid?

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HCl

H2SO4

CO2

HNO3

The study of theinteraction between drugs and biological targets, as wellas the development of new medicinal agents.

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Inorganic Chemistry

Organic chemistry

Medicinal Chemistry

Environmental chemistry

Number of protons in the nucleus of an atom is called.

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Atomic number

Mass Number

Mass Unit

Electron Number

The colour of anhydrous cobalt(II) cholride solid

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White

Black

Pink

Blue

Process of heating the concentrated ore to high temperature in excess of air is called.

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Roasting

Smelting

Bessemerization

All

About 99% atmosphere's lies within:

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30 kilometre

35 kilometre

15kilometre

11 kilometre

The reaction goes from left to right , if:

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Qc = Kc

Qc > kc

Qc<Kc

Qc = 0

Which diseases cause by the deficiency of vitamin E?

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Rickets

Anemia in babies

Scurvy

Night blindness

Night blindness is because of deficiency of:

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Vitamin A

Protein

Vitamin C

Vitamin D

If Qc > Kc the reaction will be in

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Chemical equilibrium

Static equilibrium

Reverse reaction

Forward reaction

When CaCO_3,.is heated in an open flask, it decomposes to form calcium oxides and .

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O₂

CO

CO₂

CO₃

Law of Mass Action was put forward by:

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G.N.Lewis

Lowry

Arrhenius

Gulbderg and Waage

Which is not an air pollutant?

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CO₂

CO

SO₂

NH₃

_________ acid is used in lead storage batteries as electrolyte.

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CH₃COOH

HCl

HNO₃

H₂SO₄

The value of equilibrium constant (Kc) depends only on:

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temperature

Pressure

concentration

density

The bond angle in NH3 molecule is

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109.5^o

107.5^o

104.5^o

106^o

Which of the following represents electronic configuration of the most electropositive elements

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He [ 2s^-1]

Xe [6s¹]

He [2s²]

Xe [6s²]

Rate of a chemical reaction generally increase rapidly even for small increase in temperature because of rapid increase in the

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Collisions frequency

Activation energy

Average KE of molecules

Fraction of molecules with energies more than activation energy

The number of moles of CO₂which contain 8.0 g of oxygen

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0.25

0.50

1.0

1.50

The structure of water molecule is.

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angular

Linear

Trigonal

Trigonal pyramidal

When fast neutron carries nuclear reaction with nitrogen it ejects aprticles.

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Alpha

Gamma

Beta

Nil

Salt of weak acid with strong base when dissolved in water gives.

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Acidic solution

Basic solution

Neutral solution

None of above

Gases deviate from ideal behaviour at high pressure. Which of the following is correct for non-ideal behaviour of gases

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At high pressure, the gas molecules move in one direction only

At high pressure, the collisions between the gas molecules are increased

At high pressure, the volume of the gas becomes insignificant

At high pressure, the intermolecular attraction becomes significant

When a reaction occurs in many steps than the slowest step is.

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Mechanism step

Rate determining step

enthalpy determining step

None of the above

12.04 x 10²³atoms of nitrogen gas is equal to.

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1 mol

2 mol

3 mol

4 mol

One mole of SO2 contains

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6.02 x 10²³atoms of oxygen

18.1 x 10²³atoms of SO2

6.02 x 10²³atoms of Sulphur

4 g atoms of SO2

The mean residence time of methane in atmosphere in

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1-2 years

3-4 years

3-5 years

3-7 years

As you proceed across a period in the periodic table the first ionization energy

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Decrease

Increase

Remains constant

First increase up the middle of period and then decreases

Acetylene reacts with ammoniacal cuprous chloride a red ppt is formed. This red ppt is of

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Copper chlorite

Coper chlorate

Cupric oxide

Copper acetylide

Which one is basic amino acid

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Lysine

Alanine

Glycine

Aspartic acid

The temperature of digester is main tained at

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100^oC

160-180^oC

200^oC

200-240^oC

Ethanol on oxidation in the presence of K2Cr2O7 and Conc. H2SO4 changes to.

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Acetaldehyde

Ethane

Ethene

CO2 and H2O

When methane reacts with Cl2 is commonly known as

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Mustard gas

Laughing gas

Phosgene gas

Bio gas

Which of the following elements is not present abundantly in earth's crust.

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Silicon

Aluminium

Sodium

Oxygen

Which substance is used for silvering of mirror.

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Acetaldehyde

Ethanol

Ethylene glycol

Acetone

Which raw material is used for preparation of bleaching powder.

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Cl2 and H2O

Cl2 and Lime

Cl2 and HOCl

HCl and Lime

Acetamide is prepared by

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Heating ammonium acetate

Heating methyl cyanide

Heating ethyl acetate

The hydrolysis of methyl cyanide