Question # 1

Marble is chemically

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CaCl₂

CaCO₃

Na₂CO₃

NaHCO₃

Which of the following equations represents the action of heat on NaHCO₃

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If initial concentration of the reactants and half life period of the reaction is known, then we can determine

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Average rate of reaction

Order of reaction

Rate constant k

Instantaneous rate

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Proton donar

Dehydrating agent

Catalyst

Electrophile

Which of the following is a typical transition metal

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Sc

Y

Ra

Co

Calculate the amount of charge flowing in 2 minute in a wire of resistance 10Ωwhen a potential difference of 20 V is applied

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120 C

240 C

20 C

4 C

The increase in size of the anion is due to:

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Increase in electron-electron repulsion

Increase in valence shell electrons.

Decrease in valence shell electrons.

Both (a) and (b).

Which has the largest radius?

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CO³⁺

Mn³⁺

Fe³⁺

Cr³⁺

Elements in which f-orbitals are in the process of completion are called

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Outer transition element

Inner transition elements

Non-tranistion elements

Radioactive elements

The molar boiling point constant is the ration of elevation in boiling point to :

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Molarity

Mole fraction of solvent

Mole fraction of solute.

Methyl alcohol is not used

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As a solvent

A an anti-freezing agent

As a substitute for petrol

For denaturing of ethyl alcohol

Which of the following compounds gives trichoromethane on distilling with bleaching power?

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Methanal

Phenol

Ethanol

methanol

Carboxylic acids generally exists in cyclic

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Monomers

Dimers

Trimers

Tetrameter

Which is the polymer that has amide linkage in its structure

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PVC

Poly ethene

Polyester

Nylon

Which element forms an iron with charge 3+?

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Berylium

Aluminium

Carbon

Silicon

The empirical formula of a compound is CH₂O. What may be the compound

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C₂H₅OH

C₆H₅OH

HCOOH

Sodium hexametaphophate is known as

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Calgon

Permutite

Natalite

Nitrolim

The boiling point of heavy water is

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108°C

101.4°C

99°C

110°C

Which of the following has highest bond order

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If 18 g glucose (C₆H₁₂C₆) is present in 1000 g of an aqueous of glucose it is said to be

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1 molal

1.1 molal

0.5 molal

0.1 molal

Chromium (VI) is highly toxic and can cause

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Blindness

Cancer

Liver problems

Blood problems

Which among the following elements have lowest value of IE₁?

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Pb

Sn

Si

C

Which is not a calcareous material

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Lime

Clay

Marble

Marine shell

Complex protein molecules which catalyses the organic reactions in the living cells are called

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Living organisms

Enzymes

Viruses

Bacteria

NH₃, HCL, H₂O, HL are:

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Diatomic molecules

Poly-atomic molecules

Mono-atomic molecules

Hetero atomic molecules

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Favour the formation of N₂O₄

Favour the decomposition of N₂O₄

Not alter the equilibrium

Stop the reaction

The bond angle H - O - H in ice ins closest to

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120° , 28^'

60°

90°

109°

Alkene general formula :

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C_nH_2n+2

C_nH_2n

C_nH_2n-2

C_nH_2n+1

In which type of following solutions the total volume of solutions may not be necessarily equal to sum of volumes of solute and solvent ?

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Percentage volume/volume

Percentage volume/weight

Percentage weight/volume

Percentage weight/weight

Similarity in properties of different organic compounds give rise to the under standing of ______

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Polymerization

Non-polar nature

Homologous series

Isomerism

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