Test Details

Ch. 2

Mcq

Nov 29, 6:30 PM

60 minutes

Nov 29, 7:30 PM

45.0 marks

MCQ

30 questions

Lata Paliwal

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Class Details

Science

10th

Science

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Question Text

Question 1 :
Which part of tooth, made up of calcium phosphate, is the hardest substance in the body?

Question 2 :
The solution of bleaching powder in water is always a clear solution.

Question 3 :
Water of crystallization is the fixed number of water molecules chemically attached to a unit of a salt in its crystalline form.

Question 4 :
Which of the following methods is adopted for preparing dilute solution of ${ H }_{ 2 }S{ O }_{ 4 }$?

Question 5 :
If $H^{+}$ion concentration of a solution is increasedby $10$ times, its $pH$ will :

Question 7 :
The acid present in the body of red ant is ________.

Question 10 :
Aquaregia is prepared by mixing conc. $HCl$ and $conc. HNO_3$ in the ratio ________ 

Question 20 :
Copper sulphate pentahydrate is commonly called as_______, whereas ferrous sulphate heptahydrate is commonly called as ________ .

Question 21 :
A milkman adds a very small amount of baking soda to fresh milk. The pH will :

Question 22 :
Heated calcium sulphate with half a water of crystallization is commonly called as :

Question 24 :
A salt associated with water of crystallization is known as a:

Question 25 :
$CO_2$ gas along with solid $(Y)$ is obtained when sodium salt $(X)$ is heated. $(X)$ is again obtained when $CO_2$ gas is passed into aqueous solution of $(Y)$. $(X)$ and $(Y)$ respectively are :

Question 26 :
Calamine is used to reduce the irritating effect of ant bite/sting because it reacts with (X) released due to the bit /sting of ants with (Y) present in calamine. (X) and (Y) respectively are:

Question 27 :
The water of crystallisation is the fixed number of _________ molecules in one formula unit of salt.

Question 28 :
The bleaching action of the bleaching powder is due to the liberation of 

Question 29 :
One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is:

Question 30 :
By which we can measure the exact $pH$ of aqueous solution?

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