Question # 1

Which of the following is an ortho-para directing group

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Formic acid is given names from Latin word a "formic" which means:

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Red out

Vinegar

butter

Milk

An ion bearing positive charge is called:

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Cation

Positron

Anion

None of above

Which of the following nitrogen fertilizer contains more nitrogen

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NaNO₃

KNO₃

NH₄NO₃

Urea

Eka-aluminium and Eka-silicon are known as

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Gallium and Germanium

Aluminium and silicon

Iron and sulphur

Proton and silicon

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2

3

4

9

Ethyl alcohol prepared during fermentation is pure:

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20%

10%

11%

12%

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

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Decrease rapidly

Decrease slowly

Does not change

Drops to zero

Organic acid without a carboxylic acid group is

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Ascorbic acid

Vinegar

Oxalic acid

Picric acid

Ethyl chloride on treatment with aqueous alkali gives

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Ethane

Ethene

Ethanal

Ethanol

The acid present in the stings of bees and wasps in

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Acetic acid

Formic acid

Formalin

Formaldehyde

Which nitrogen fertilizer is favoured in tropical regions because of its-hygroscopic nature

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Ammonium sulphate

Ammonium nitrate

Ammonium chloride

Ammonium phosphate

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

The detection of functional group is called :

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Numerical analysis.

Qualitative analysis.

Combustion analysis.

Quantitative analysis.

The electronegativeities of F,Cl,Br and I are 4.0,3.0,2.8,2.5 respectively.Hydrogen halide with a high percentage of ionic character is

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HF

HCL

HBr

HI

Analytical chemistry is the science of

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Chemical characterization

Physical characterization

Biological characterization

Biochemical characterization

The reference calomel electrode is made from which of the following?

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ZnCl₂

CuSO₄

Hg₂Cl₂

HgCl₂

The element which has a simple cubic lattice in solid state is

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Se

Te

Po

None of these

The total number of inner transition elements in the periodic table is

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10

14

28

30

The unit of the rate constant is the same as that of rate of reaction in :

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Third order reaction

Second order reaction

First order reaction

Zero order reaction

Acetone reacts with HCN to form a cyanohydrin. It is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

To get DDT, chlorobenzene has to react with one of the following compound in the presence of conc.H₂SO₄

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Trichloroethane

Dichloroacetone

Dichloroacetaldehyde

Trichloroacetealdehyde

The alkaline earth elements have in their s-orbital

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One electron

Two electron

No electron

Three electron

To determine the rate of reaction chemically a graphical method is applied. A graph is plotted between the amount or reactant decomposed or product formed against the time. The rate d_x/d_tat any time is equal to

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k

Tangentθ

1/a, a is initial conc.

1/a²

pH of the human blood which is essentially maintained constant due to carbonates, biocarbonates, phosphates etc., is

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7.00

7.25

7.35

7.47

Coordination number of Pt in [PtCI(NO₂) (NH₃)₄]²⁺is

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2-

4

1

6

Aldehydes and ketones are carbonyl compounds. Which of them react both with NaBH₄and with Tollen's reagent

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Both aldehydes and ketones

Aldehydes only

Ketones only

Neither aldehydes nor ketones

Oxidation of ter-alcohol gives:

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Aldehyde

Formaldehyde

Ketone

Alkens

In CH₄, all the H-C-H bond angles are

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120°

107°

109°

109.5°

The diameter of atoms is of the order:

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2* 10^-5m

2* 10^-10m

2* 10^-2m

2* 10^-3m

Which of the following is not present in RNA?

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Uracil

Thymine

Ribose

Phosphate

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