Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?

Bleaching action of bleaching powder is due to its __________ properties.

A

Reducing

B

Oxidising

C

Disinfecting

D

None of these

In a sample of 50 people, 19 had type O blood, 22 had type A blood, 7 had type B blood and 2 had type AB blood. If a person is selected randomly, find the probability that the person has neither type A nor type O blood?

A

15/25

B

31/50

C

11/25

D

9/50

In a group of 52 persons , 16 drink tea but not coffee and 33 drink tea. How many drink coffee but not tea?

A

3

B

7

C

19

D

17

Which of the following is used to remove rust stains on cloth?

A

Kerosene

B

Lime

C

Oxalic acid solution

D

Petrol

Which of the following is used to remove ink and rust stains on cloth?

A

Oxalic acid

B

Alcohol

C

Ether

D

Kerosene oil

Which one of the following organic compound is used to remove stains of iron compounds?

A

Oxalic acid

B

Benzoic acid

C

Phthalic acid

D

Cinnamic acid

Myocobacterium tuberculosis is identified by following stains

A

Acid fast stain

B

Zeihl Neelson stain

C

Gram stain

D

H & E stain

E

PAS stain

Hydrogen peroxide _____ as a bleaching agent because it effectively whitens a variety of fibres abd surfaces.

A

used

B

is used

C

is using

D

that it use

The most commonly used bleaching agent is

A

alcohol

B

carbon dioxide

C

chlorine

D

sodium chlorine

Chlorine acts as a bleaching agent only in the presence of

A

Dry air

B

Pure oxygen

C

Moisture

D

Sunlight

Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?

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