What element is found in all organic compounds?

Correct Answer: An atom is the smallest particle of a substance Chemical substances are divided into two major groups They are 1 Pure Substances (and) 2 Mixtures There are two types of pure substances that are Elements and Compounds Elements : An element is a substance that is made up of only one kind of atoms and cannot be broken down into simpler substances by chemical means Metals and Non- metals come under elements Examples of elements are Iron, Silver, Gold, Mercury etc Compounds : A Compound is a substance that is formed when two or more elements combine chemically Examples of compounds are Water, Carbon dioxide, methane, vinegar etc Mixtures : A Mixture is formed when two or more substances mixed together but not chemically combined Example: Air

Correct Answer: No Boiling water is not a chemical change Because in this process it doesn't loss its properties It just changes its state ie, from liquid state to gaseous Hence, Boiling water is a Physiacl change and not a chemical change

Correct Answer: homogenous, silicates

Correct Answer: Aluminium

Correct Answer: nuclear fission

Correct Answer: steroid

Explanation:

Estrogen is a group of steroid hormone that control the development and maintenance of an individuals feminine characteristics. Natural estrogen exists in men as well as women and are found in higher amounts in women Especially in those of reproductive age.

 

Estrogens are hormones which are responsible to the body functions of the female body system such as menstruation, development of the female body such as pubic hair, breasts and development of the proportions of the body.

 

Lipids act as best energy storage molecules as the cleavage of fatty acids produces both energy and metabolic water which is a main component in almost all lipids.

Correct Answer: 0 deg C

Explanation:

The freezing point of water and melting point is 0 °C or 32 °F. The temperature may be lower if supercooling occurs.

Correct Answer: Pentagonal bipyramid

Explanation:

Hybridisation of iodine is  s p 3 d 3

 

So, the structure is pentagonal bipyramid.

Correct Answer: increase the alkalinity of the soil

Explanation:

Lime is sometimes applied to soil in order to increase the acidity of the soil.

Correct Answer: Plant ----> Animal ----> Atmosphere

Explanation:

During daylight hours, plants capture carbon dioxide from the atmosphere and use it to make carbohydrates which is stored as starch in the plant. Animals feed on the plants and extract the carbohydrates through their digestive system. The carbohydrates, namely glucose, are used by the animals for production of ATP through cellular respiration.

 

Cellar respiration in the animals produces carbon dioxide as a waste product. The carbon dioxide is released into the atmosphere, from where it is again captured by plants and the cycle is repeated.

 

Hence, option B) Plant ----> Animal ----> Atmosphere is the path possible in carbon cycle.