Question # 1

The net heat change in a chemical reaction is the same whether it is brought about in two or more different ways in one or several steps.it is known as

Choose an answer

Henry's law

Hess's law

joule's law

Law of conservation of energy

In the atmosphere, O₂is about

Choose an answer

10%

15%

21%

25%

Final product of hydrolysis of nitrile is

Choose an answer

Ketone

Alcohol

Aldehyde

Carboxylic acid

Which compound is obtained hy the elimination reaction on bromoethane?

Choose an answer

Butene

Ethene

Propene

Propane

The main pollutant of leather tanneries in the waste water is due to:

Choose an answer

Lead

Copper

Chromium (VI)

Chromium (III)

The order of reactivitv of alksI halides towards nucleophile is

Choose an answer

RI>RBr RF>RCI

RF>RCI>RBr>RI

RI>RBr> RCI>RE

RF>RBr>RCI>RI

The order of reaction provides valuable information about of reaction

Choose an answer

Condition

Concentration

Mechanism

Parameters

Which products are formed when triglyceride is hydrolysed

Choose an answer

Glycerol

Fatty acid

Glycerin

Both A and B

The molecules of CO₂is dry ice form the

Choose an answer

ionic crystals

covalent crystals

molecular crystals

any type of crystal

The number of unpaired electrons present in Fe ions is

Choose an answer

1

2

5

0

one gram of carbohydrate yields energy:

Choose an answer

10kcal

100kcal

4kcal

9kcal

What is the nature of Al₂O₃

Choose an answer

Acidic

Basic

Amphoteric

Neutral

The effective activity of a metal catalyst is increased if it is in

Choose an answer

Solid form

Liquid state

Gaseous state

Finely divided form

A set of compounds in which reactivity of halogen atom in the ascending order is

Choose an answer

Chlorobenzene, vinyl chloride, chloroethane

Chloroethane, chlorobenzene, vinyl chloride

Vinyl chloride,chlorobenzene chloroethane

Vinyl chloride, chloroethane,chlorobenzene

Which of the following molecules have its central atom sp²hybridized

Choose an answer

CH₄

C₂H₂

C₂H₄

CCl₄

Which is true about the electronegativity order of the following?

Choose an answer

P > Si

C > N

Br > Cl

Sr > Ca

Which of the following is non-typical transition element?

Choose an answer

Cr

Mn

Zn

Fe

Aledehydes ketones can be prepared form alcohols by their:

Choose an answer

Reduction

Oxidation

Decomposition

Synthesis

The color of ppts formed by Fehling's test is

Choose an answer

Brick red

Red

Yellow

Orange

Compounds X, Y and Z, all react with PCI₅to release hydrogen chloride, but only one of them reacts eith 2,4-dinitrophenylhydrazine reagent. Which one of the following combinations could be X, Y and Z

Choose an answer

Acetylene had a characteristic ethereal smell resembling that of

Choose an answer

Ginger

Vinegar

Garlic

Onion

Ketons are prepared by the oxidation of

Choose an answer

Primary alcohol

Secondary alcohol

Tertiary alcohol

None of these

More Classes

Other Links

Chemistry General Science Test Medium Mode MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer