Chemistry MCQ: Practice Questions & Answers (Telugu) - Page 23

441.

When ethyne is burned with a certain gas, it can produce temperatures hot enough to melt metals. This is made use of in welding. What is this other gas called?oxyacetylene.gif

A

Oxygen

B

Carbon dioxide

C

Nitrogen

D

Methane

ChemistryEasyHydrocarbons

442.

Which of the following yield both alkane and alkene?

A

Kolbes electrolysis

B

Williamsons synthesis

C

Wurtz reaction

D

Sandmeyer reaction

ChemistryEasyHydrocarbons

443.

Chromyl chloride oxidises totulene to benzaldehyde, this reaction is known as

A

Rosennmund reaction

B

Wurtz reaction

C

Etard reaction

D

Fitting reaction

ChemistryEasyHydrocarbons

444.

Chlorination of alkanes is an example of ............ reaction.

A

elimination

B

free redical

C

redical

D

none of above

ChemistryEasyHydrocarbons

445.

Methane is the ............. component of natural gas:

A

between

B

major

C

minor

D

none of above

ChemistryEasyHydrocarbons

446.

Compounds that have the same molecular formula, but different structural formula are known as

A

isomers

B

monomers

C

isotopes

D

polymers

ChemistryEasyHydrocarbons

447.

Ethylene is a ________ molecule.

A

nonpolar

B

polar

C

both

D

none of above

ChemistryEasyHydrocarbons

448.

Which of the following is used as a synthetic fibre.

A

acrylonitrile

B

vinyl acetate

C

none of above

D

nil

ChemistryEasyHydrocarbons

449.

When toluene i treated with KMNO4, what is produced

A

Benzene

B

Chlorobenzene

C

Benzaldehyde

D

Benzoic acid

ChemistryEasyHydrocarbons

450.

Ethene is slightly .............. in taste.

A

bitter

B

tasteless

C

sweet

D

none of above

ChemistryEasyHardness Of Water

451.

Zeolite used in zeolite softening process for the treatment of hard water gets exhausted after certain time of usage but can be regenerated by flushing it with

A

10% calcium chloride solution

B

10% Magnesium Chloride solution

C

10% Magnesium sulphate solution

D

10% sodium chloride solution

ChemistryEasyHardness Of Water

452.

Zeolite softening process removes

A

Only temporary hardness of water

B

Only permanent hardness of water

C

Both temporary and permanent hardness of water

D

The dissolved gases in permanent hard water.

ChemistryEasyHardness Of Water

453.

Which of the following substances are commonly used in a filter?

A

Charcoal

B

Sand

C

both a & b

D

Aluminium Chloride

ChemistryEasyHardness Of Water

454.

Which of the following salts cause least hardness to water when converted to $CaCO_3$ equivalents?

A

10 mg of $CaCO_3$

B

19 mg of $CaSO_4$

C

10 mg of $MgCl_2$

D

10 mg of $CaCl_2$

ChemistryEasyHardness Of Water

455.

Which of the following physical method is used as germicidal in modern time for the treatment of drinking water?

A

Chlorination

B

Treating with Potassium permanganate

C

UV radiation

D

Treating with Bleaching powder

ChemistryEasyHardness Of Water

456.

Which of the following methods separates ionic and non – ionic impurities from water?

A

Electrodialysis

B

deionization

C

reverse osmosis

D

zeolite process

ChemistryEasyHardness Of Water

457.

Which of the following chemical is sometimes added in the process of coagulation and flocculation.

A

Aluminum sulphate

B

Aluminium oxide

C

Calcium chloride

D

none of these

ChemistryEasyHardness Of Water

458.

When temporary hard water is boiled, one of the substance formed is

A

$CaCO_3$

B

$CaSO_4$

C

$HCl$

D

$CO_2$

ChemistryEasyHardness Of Water

459.

Uneven deposition of turbines causes

A

Vibrational problems

B

Heat problems

C

Power problems

D

Uncontrolled cooling.

ChemistryEasyHardness Of Water

460.

Ultraviolet rays are used in the treatment of water for

A

Filtration

B

Sedimentation

C

Screening

D

Sterilization.

Chemistry : Practice Questions and Answers

Chemistry : Practice Questions and Answers