Question # 1

Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen

Choose an answer

2 days

5 days

6 days

7 days

Which of the following successive ionization energies belong to a Group ll element?

Choose an answer

320,600,1110,1700,5650,

577,1820,2740,1160,14800,

428,3070,4600,5860,7990

736,1451,7740,10500,13600

What is the effect of polluted air on environment:

Choose an answer

ozone

acid rain

global warming

smog

Which woody raw material is used for the manufacture of paper pulp?

Choose an answer

cotton

bugases

poplar

rice straw

Buffer solutions are used in except

Choose an answer

Clinical analysis

Nutrition

Soil science

Qualitative analysis

Which of the following compound is least reactive

Choose an answer

HCHO

CH3CHO

CH3COCH3

C6H5CHO

Ethane nitrile can be converted into ethanoic acid through......intermediate

Choose an answer

Ethyl alcohol

AcetyI chloride

Acetamide

Methyl cyanide

Water is essential for life on

Choose an answer

Moon

Space

Earth

Sun

Plastics are amorphous solids and

Choose an answer

have sharp melting points

undergo clean cleavage when cut with knife

do not undergo clean cleavage

possess orderly arrangement over long distances

Styrene has empirical formula CH, and there is 92.2%C and 7.75% hydrogen. If molar mass is 104g mol¯, what will be integral multiple (n) to get molecular formula:

Choose an answer

2

4

6

8

Which of the following has isomorphous structure with MgO

Choose an answer

NaF

S

Sn

N

Which colour is imparted by sodium

Choose an answer

Yellow

Violet

Red

Crimson

A compound R has all of the following properties. It is neutral; It gives an orange precipitate with 2,4-dinitrophenythydrazine; it evolves hydrogen chloride when treated with PCI₅in the cold What could R be

Choose an answer

By reaction Grignard's reagent with the HCHO we get

Choose an answer

1° - alcohol

2° - alcohol

3° - alcohol

All of these

Transition elements form which type of bond

Choose an answer

Ionic bonds only

Covalent bonds only

Ionic and covalent bonds

Polar bonds

The other name for distribution law is

Choose an answer

Dispersive law

Partition law

Avogadro's law

separation law

Noble gases have the electronic configuration with their valance shell ns²np⁶except one

Choose an answer

He

Ne

Kr

Xe

Outer shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be

Choose an answer

XY

X₂Y

X₂Y₃

XY₂

When phenol is reduced in the presence of Zn dust, we get

Choose an answer

Cyclohexene

Cyclohexane

Benzene

Benzyne

Glutamic acid, aspartic acid are ______ amino acid

Choose an answer

Acidic

Basic

Neutral

None of these

Increasing skin cancer and high mutation rate are due to

Choose an answer

Acid rain

Ozone depletion

CO pollution

CO₂Pollution

Nylon 6, 6 is prepared by the reaction of nexamethylene with

Choose an answer

Formic acid

Acetic acid

Adipic acid

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