Tag: chemistry in daily life

Questions Related to chemistry in daily life

Currency notes can be marked with an invisible ink. Thieves can be trapped because this ink

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. Shows up in ultraviolet light

  2. Turns red on adding alkali

  3. Turns blue on adding acid

  4. It attracted by a magnet

Show answer
Correct Option: A
Explanation:

Invisible ink shows up in ultraviolet light.

Modern UV-invisible ink is mainly made by a fluorescent derived from things in nature that glow when exposed to an UV light.

Four samples of arhar dal were taken in four test tubes with some water in each and
labelled P,Q, R and S. A few drops of the following were added to these test tubes,
water to test tube P, HCl to test tube Q, NaOH to test tube R and alcohol to test tube S.
We would be able to confirm adulteration of the dal with metanil yellow in test tubes :

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. Q

  2. Q and R

  3. R and S

  4. S and P

Show answer
Correct Option: A
Explanation:

Metanil yellow adulteration in foods can be identified upon addition of HCl to the solution. 


As HCl with metanil yellow gives pink colour. 

Therefore, the adulteration could be confirmed only in test tube Q.

Hence the correct option is A.

A lot of controversy has been generated over the use of 'BVO' in soft drinks on the ground that it is carcinogenic (cancer-causing). What is 'BVO'?

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. Brominated vegetable oil

  2. Basic vitamin overdose

  3. B-complex vitamin overdoes

  4. Bakery vanilla odour

Show answer
Correct Option: A
Explanation:

BVO stands for brominated vegetable oil which is a food additive sometimes used to keep citrus flavoring from separating out in some sodas and sports drinks.

It is a complex mixture of plant derived triglycerides that have been reacted to contain atoms of the elements bromines bounded to the molecules.

Which of the following fibres is said to be very harmful for health?

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. Sawdust

  2. Asbestos

  3. Hay

  4. Cellulose

Show answer
Correct Option: B
Explanation:

Heavy exposure to asbestes over many years causes asbestosis which is a serious scarring condition of the lungs. This condition can cause progressive shortness of breath and in server cases can be fatal.

As regards the use of international food safety standards as reference point for the dispute settlements, which one of the following does WTO collaborate with?

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. Codex Alimentarius Commission

  2. International Federation of Standards Users

  3. International Organization for Standardization

  4. World Standards Cooperation

Show answer
Correct Option: A
Explanation:

Codex alimentarius commision was created in 1963 by FAO and WHO to develop food standards guidelines and related texts such as codes of practice under to joint FAO/WHO food standards programme. The main purpose of this program are protecting health of the consumer and ensuring fair trade practices in food trade.

Which of the following is used for preservation of biological substances and food materials?

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. Liquid ammonia

  2. Liquid dinitrogen

  3. Liquid sulphur dioxide

  4. Carbon dioxide

Show answer
Correct Option: B
Explanation:

Liquid nitrogen has many uses, mainly based on its cold temperature and low reactivity. Examples of common applications include:

1. The freezing and preservation of food products
2. The preservation of biological samples, such as sperm, eggs, and animal genetic sample.
3. Use as a coolant for superconductors, vacuum pumps, and other materials and equipment.
4. Use in cryotherapy to remove skin abnormalities.
5. The shielding of materials from the oxygen exposure
6. The quick freezing of water or pipe to allow work on them when valves aren't available
8. A source of extremely dry nitrogen gas.

Match the following

1) Food preservative a) Reserpine
2) Anti depressant b) Sodium benzoate
3) Lowers blood pressure c) Analgesic
4) Pain reliever d) Tofranil
-- e) Sodium cyclamate
chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. 1-a, 2-b, 3-d, 4-e

  2. 1-e, 2-a, 3-d, 4-b

  3. 1-b, 2-d, 3-a, 4-c

  4. 1-b, 2-e, 3-c, 4-d

Show answer
Correct Option: C
Explanation:

Reserpine-  Lowers blood pressure 
Sodium benzoate- Food preservatives, which prevent spoilage of food due to microbial growth.
Analgesic-Analgesics reduce or abolish pain without causing impairment of consciousness, mental confusion, in coordination or paralysis or some other disturbances of nervous system
Tofranil-Anti depressant 

Arrange the following in decreasing order of the sweetening capacity.
(I) Saccharin
(II) Aspartame
(III) Alitame 

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. I > II > III

  2. III > II > I

  3. III > I > II

  4. II > I > III

Show answer
Correct Option: C

Full form of GFC is?

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. Grazing food chain

  2. Grazing fish chain

  3. Gross food chain

  4. Green forest conservation

Show answer
Correct Option: A
Explanation:

GFC means "Grazing Food Chain".

A grazing food chain is a food chain in which the energy in the lowest trophic level is derived from photosynthesis.


 GFC is the major source of energy flow in the terrestrial ecosystem.

Which of the following statement is wrong about Abscisic acid :

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. It helps in general plant metabolism

  2. It is antagonistic to $GA _3$

  3. It helps in seed maturation & dormancy

  4. Morphogenesis

Show answer
Correct Option: A
Explanation:

It helps in general plant metabolism