Question of Exercise 1

Changes Around Us of Class 6

Which one of the following is a reversible change ?


Option 1Curdling of milk

Option 2Ripening of fruits

Option 3Melting of ice

Option 4Burning of wood

Frequently Asked Questions

Identify the plural form of the following noun: tomato


A: tomatoes

B: tomatos

C: tomatoez

D: tomatows



  • The plural form of any noun is the word used when there is more than one entity of any certain something.
  • So, for the given word ‘tomato’, the plural form is ‘tomatoes’.
  • Options B, C, and D are wrong as they are spelled incorrectly.

Final Answer: The correct answer option is A i.e., tomatoes.

Name the following

(a) The three hormones produced by pancreas
(b) The hormone produced by adrenal medulla
(c) The condition caused by the over secretion of insulin
(d) The hormone secreted by beta cells of the islets of Langerhans
(e) The hormone which increases blood pressure
(f) The hormone causing more urine formation
(g) The hormone which stimulates the entire sympathetic nervous system


(a) Insulin, glucagon, somatostatin
(b) Adrenaline
(c) Hypoglycemia
(d) Insulin
(e) Adrenaline
(f) Anti-diuretic hormone (Vasopressin)
(g) Adrenaline

The deficiency of ADH causes

(a) diabetes mellitus
(b) diabetes insipidus
(c) dwarfism 
(d) acromegaly


(b) diabetes insipidus

Exophthalmic goitre is caused due to the overactivity of

(a) thymus 
(b) thyroid
(c) parathyroid 
(d) adrenal cortex


(b) thyroid

A gland having endocrine as well as exocrine function is

(a) Pituitary 
(b) Thyroid
(c) Pancreas 
(d) adrenal


(c) Pancreas

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