Question

11.
Write the reaction of the substance 'X' named react with wate
0.7 Why should a Magnesium ribbon be cleaned before burning in air
Or
Write the limitation of Newland's law of octaves
Q.8 What is respiration and write its types
Or
Nephron is called magic filter. Why?
0.9 What is excretion? Write the names of excretory organ.
Or
Write the name of plant hormones with its function.
Q.10 What is Liver? Write its function.
Or
What is Neurons? Describe its structure.
0.11 Write the function of Human Kidney​

Answer 1

Answer:

Write the reaction of the substance X named in (1) above with water. Answer: (1) The solution of the substance used for whitewashing is calcium oxide also called quicklime with chemical formula CaO. ... CaO (s) + H2O (l) → Ca(OH)2(aq).

HOPE IT'S HELPFUL

Answer 2

Answer:

Ans9:- plant hormones are- cytokinin, ethylene, gibberellin, Auxin,abscisic acid

FUNCTION OF PLANT HORMONES

Ethylene- ripening of fruit

cytokinin- helps in plant cell to divide

Gibberellin- help in growing of plant

Auxin- involved in tropism,also help in grow of their branches

Abscisic acid- close the stomatal pores

Ans10:- liver is the largest solid organ and the largest gland in the human body helps in protein synthesis and detoxification.

function of liver:-

1 bile production and excretion.

2 enzyme activation.

3 storage of glycogen, vitamin and minerals.

4 metabolism of fat, carbohydrates and protein.

5 Excretion of cholesterol, hormones and drug.

ANS11:- function of kidney

1. regulation of pH.

2. excretion of waste and toxic.

3. production of hormones.

4. regulation of ion concentration.

5. regulation of osmolarity.

ANS8:- respiration is simply can be explained that taking of oxygen and removal of carbon dioxide like breathing process from the outside (environment).

types of respiration

• Breathing or ventilation.
• Cellular respiration.
• External respiration.
• Internal respiration.

ANS7:- limitations of Newlands law of octave

• it was applicable for the lighters elements whsich have 40 u only
• only 56 elements were known at that time but later discovery of some more elements was reason behind it.
• after calcium, every eight elements didn't possess properties similar to that of the first.
• Newland could arrange the elements upto calcium only out of the 56 elements at that time.