Chemistry MCQ: Practice Questions & Answers (Tamil) - Page 21

ChemistryEasyIndustrial Chemistry

401.

Aspirin is

A

vinyl chlodride

B

ethylene

C

chloroprene

D

acrlonitrite

ChemistryEasyIndustrial Chemistry

402.

Artificial Silk is

A

adepic acid and hexamethylenediammine

B

terephthalic acid and ethylene glycol

C

phenol and formaldehyde

D

vinyl cyanide

ChemistryEasyIndustrial Chemistry

403.

A substance which can act both as an antiseptic and disinfectant is

A

Enzyme

B

Teflon

C

Sucrose

D

Starch

ChemistryEasyIndustrial Chemistry

404.

A medicine which promotes secretion of urine is called

A

formaldehyde

B

acetaldehyde

C

ethylalcohol

D

acetone

ChemistryEasyIndustrial Chemistry

405.

A biodgradable detergent should contain by structurally

A

Teflon

B

Balelite

C

Polystyrene

D

nylon-6

ChemistryEasyIndustrial Chemistry

406.

2,4-dichlorophenxy acetic acid is used as a

A

Polystyrene

B

Polyethylene

C

Polypropylene

D

Dacron

ChemistryEasyHydrogen

407.

You can use a hydrogen fuel cell to power

A

Cars/Busses

B

Fork-lifts

C

Cell phones

D

All of the above

ChemistryEasyHydrogen

408.

Why does H+ ion always get associated with other atoms or molecules?

A

Ionisation enthalpy of hydrogen resembles that of alkali metals.

B

Its reactivity is similar to halogens.

C

It resembles both alkali metals and halogens.

D

Loss of an electron from hydrogen atom results in a nucleus of very small size as compared to other atoms or ions. Due to smal size it cannot exist free.

ChemistryEasyHydrogen

409.

Which one is ionic hydride in nature?

A

CrH

B

$NH_3$

C

$H_2O$

D

NaH

ChemistryEasyHydrogen

410.

Which of the following ions will cause hardness in water sample?

A

Ca2+

B

Na+

C

Cl-

D

K+

ChemistryEasyHydrogen

411.

Which of the following hydrides is electron-precise hydride?

A

$B_2H_6$

B

$NH_3$

C

$H_2O$

D

$CH_4$

ChemistryEasyHydrogen

412.

Which of the following compounds is used for water softening?

A

Ca3 ( $PO_4$ )2

B

$Na_3PO_4$

C

$Na_6P_6O_{18}$

D

$Na_2HPO_4$

ChemistryEasyHydrogen

413.

Which group forms hydride?

A

6

B

7

C

8

D

9

ChemistryEasyHydrogen

414.

When sodium peroxide is treated with dilute sulphuric acid, we get

A

sodium sulphate and water

B

sodium sulphate and oxygen

C

sodium sulphate, hydrogen and oxygen

D

sodium sulphate and hydrogen peroxide

ChemistryEasyHydrogen

415.

When $MnO_4$ reacts with $H_2O_2$ in basic medium then following species are involved, except

A

$MnO_2$

B

$O_2$

C

OH-

D

$Mn^{2+}$

ChemistryEasyHydrogen

416.

What is the strength of 20 volume solution of $H_2O_2$ ?

A

5g/L

B

10g/L

C

30g/L

D

60g/L

ChemistryEasyHydrogen

417.

What is the only by-product of hydrogen fuel-cells?

A

Carbon Dioxide ( $CO_2$ , which is a greenhouse gas)

B

Nothing

C

Water vapor

D

Helium

ChemistryEasyHydrogen

418.

What is the most common element in the world?

A

Hydrogen

B

Oxygen

C

Helium

D

Carbon

ChemistryEasyHydrogen

419.

What can you produce hydrogen from?

A

Water

B

Plants

C

Natural gasl

D

All of the above and more

ChemistryEasyHydrogen

420.

True/False: hydrogen fuel cell vehicles are electric vehicles

A

False Statement

B

True Statement

Chemistry : Practice Questions and Answers

Chemistry : Practice Questions and Answers