National Science Olympiad Forum By SOF Olympiad Trainer - Page 83

User Forum

Subject :NSO    Class : Class 10

A compound is prepared from gypsum upon heating to a temperature of 373 K and it changes back to gypsum on adding water. Which is the incorrect statement about the compound?

A The compound is used for setting fractured bones.
B The compound is called plaster of Paris which is calcium sulphate dihydrate with a formula CaSO4.2H2O.
C If heated at higher temperature, the compound becomes dehydrated and is called dead burnt plaster.
D Both (A) and (B).


option is d

Post Your Answer

Subject :NSO    Class : Class 5

Post Your Answer

Subject :NSO    Class : Class 5

Post Your Answer

Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8

Post Your Answer

Subject :NSO    Class : Class 7

Read the given statements and select the option that correctly identifies them as true (T) and false (F) ones.
(i) Llama and alpaca are breeds of wool yielding camels.
(ii) Cocoon of silkworm secretes fibre made of protein which hardens on exposure to air and becomes silk fibre.
(iii) Anthrax is an occupational disease of wool industry caused by Bacillus anthracis.

(i) (ii) (iii)
A T F F
B T F T
C F F T
D T T F


Sorter's disease is an occupational disease of wool industry caused by Bacillus anthracis.

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8

Ans 3:

Class : Class 3

Post Your Answer

Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8
Solution Wrong!

Post Your Answer

Subject :NSO    Class : Class 9

Ans 1:

Class : Class 10

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
please give explanation

Ans 2:

Class : Class 4

Post Your Answer

Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7
Option C could also be possible

Ans 3:

Class : Class 6

Post Your Answer

Subject :NSO    Class : Class 7

Post Your Answer